A disturbance-enhanced granulation method and system with freely adjustable blade angle

Abstract

A disturbance-enhanced granulation method and system with freely adjustable blade angle, the system comprising a granulation barrel, a granulation device and a frame. The granulation barrel is a cylindrical structure, and the frame is a frame structure. The granulation device comprises a granulation paddle shaft, a granulation blade and a granulation paddle drive device. The granulation paddle shaft and the granulation paddle are both arranged inside the granulation barrel, and the granulation paddle drive device is arranged on the frame. A plurality of granulation blades are evenly distributed on the granulation paddle shaft. The outer end portion of the granulation blade away from the granulation paddle shaft is designed to be bent in the direction of movement, and the upper surface of the granulation blade is an inclined surface inclined in the direction of movement. The present invention adopts a granulation blade with an inclined upper surface and a bent end, which applies forces in multiple directions to the material during the granulation process, causing the material to roll while moving forward and upward, increasing the contact frequency between the materials and improving the granulation efficiency.

Description

Technical Field

[0001] The present invention relates to a granulation device and method, in particular to a disturbance-enhanced granulation method and system with freely adjustable blade angle, belonging to the field of sintering granulation. Background Art

[0002] In the steel industry, sintering machines are used to sinter concentrate powder, rich ore powder and secondary iron-containing raw materials of different compositions and particle sizes into blocks, and partially eliminate harmful impurities such as sulfur and phosphorus contained in the ore in preparation for use in blast furnace ironmaking.

[0003] Since concentrate powder, rich ore powder and secondary iron-containing raw materials are all fine-particle powders, they cannot be sintered directly. They need to be processed into granular materials with a certain volume before they can be put into the sintering machine for sintering. Therefore, granulation is an important part of the sintering process.

[0004] The existing technology of sintering raw material granulation mainly adopts the cylindrical granulator, which is a hollow cylindrical body arranged at a certain angle and continuously rotating around the center line of the barrel. The material of the cylindrical granulator enters from the higher end. As the barrel rotates, the material rolls from the higher end to the lower end with the help of gravity and is discharged from the lower end. The principle of cylindrical granulation is as follows Figure 7 a. Figure 7 As shown in b, the barrel of the granulator will lift the material in the barrel during the rotation process. When the material is lifted to a certain height, that is, when the lifting angle is greater than the angle of repose of the material, the pile will collapse, causing the material to slide relatively along its surface, and complete the particle growth during the sliding process to achieve granulation. The cylindrical granulator is a passive granulation device. The granulation motion obtained by the material is weak, and the core material cannot obtain regular relative sliding, which does not meet the granulation conditions. Therefore, the granulation effect is poor, and the critical conditions for material granulation are high, such as high moisture content requirements and high adhesive ratio requirements, which make the proportion of non-ferrous components in the raw materials high. It is difficult to meet the requirements of modern technological progress and has formed a technical bottleneck. In addition, CN201911401704 discloses a multi-disc excitation perturbation method forced granulator, which is provided with a disk perpendicular to the axis of the rotating disk cluster and a plurality of excitation disks distributed along the axis, which improves the existing granulation process. However, the direction of the force exerted by the excitation disk on the material is relatively single, resulting in a low contact frequency between the materials and an insufficient granulation efficiency. Summary of the Invention

[0005] To address the existing problems of cylindrical granulators, which have poor granulation efficiency, high critical conditions for material granulation, and low granulation efficiency with perturbation granulators, the present invention proposes a perturbation-enhanced granulation method and system with freely adjustable blade angle. The present invention incorporates angle-adjustable, end-bent granulation blades in the granulator. During the granulation process, these blades impart forces in different directions to the material, causing it to roll in three dimensions and enhancing the granulation effect. Furthermore, the blades can freely adjust their inclination angle to ensure that the particle size of the granulated material meets production requirements.

[0006] According to a first embodiment of the present invention, a disturbance-enhanced granulation system with freely adjustable blade angle is provided.

[0007] A disturbance-enhanced granulation system with freely adjustable blade angle, the system comprises a granulation barrel, a granulation device and a frame. The granulation barrel is a cylindrical structure, the frame is a frame structure, and the granulation barrel is arranged in the frame. The granulation device comprises a granulation paddle shaft, a granulation blade and a granulation paddle drive device. The granulation paddle shaft and the granulation paddle are both arranged inside the granulation barrel, and the granulation paddle drive device is arranged on the frame. The top of the granulation paddle shaft is connected to the granulation paddle drive device. Several granulation blades are evenly distributed on the granulation paddle shaft. The outer end portion of the granulation blade away from the granulation paddle shaft is designed to be bent in the direction of movement, and the upper surface of the granulation blade is an inclined surface inclined in the direction of movement. Preferably, the granulation paddle shaft is eccentrically arranged inside the granulation barrel.

[0008] Preferably, the granulating blade is movably connected to the granulating blade shaft so that the angle α between the upper surface of the granulating blade and the horizontal plane can be freely adjusted within the range of 0-90°. Preferably, the angle α between the upper surface of the granulating blade and the horizontal plane is 5-85°, preferably 10-80°, more preferably 15-75°, more preferably 20-70°, for example, any one of 22°, 24°, 26°, 28°, 30°, 32°, 34°, 36°, 38°, 40°, 42°, 44°, 46°, 48°, 50°, 52°, 54°, 56°, 58°, 60°, 62°, 64°, 66°, and 68°.

[0009] Preferably, the inner end of the granulating blade is perpendicular to the shaft wall of the granulating paddle shaft. The bending angle β formed by the bent outer end of the granulating blade and the inner end of the granulating blade is 95-170°, preferably 100-150°, more preferably 110-140°, for example, any one of 115°, 120°, 125°, 130°, and 135°.

[0010] Preferably, n layers of granulating blades are provided on the outer surface of the granulating paddle shaft from top to bottom, with each layer having 1 to 15 granulating blades. Preferably, each layer has 2 to 12 granulating blades, more preferably each layer has 3 to 10 granulating blades, and the granulating blades in the same layer are evenly distributed around the granulating paddle shaft. Wherein: 1 ≤ n ≤ 30, preferably 3 ≤ n ≤ 20, more preferably 5 ≤ n ≤ 15, and n is an integer.

[0011] Preferably, the n layers of granulating blades are arranged in a staggered distribution from top to bottom, that is, in the vertical direction, between any two adjacent layers of granulating blades, the projections of any upper and lower adjacent granulating blades do not overlap.

[0012] Preferably, n layers of granulating blades are arranged in a spiral staircase arrangement from top to bottom. That is, in the vertical direction, when each granulating blade layer has only one granulating blade, all the granulating blades can together form a spiral staircase granulating blade group arranged from top to bottom and spiraling around the outer surface of the granulating blade shaft. Preferably, when each granulating blade layer has m granulating blades, all the granulating blades can together form m mutually parallel spiral staircase granulating blade groups.

[0013] Preferably, the length of the granulating blades in the n-layer granulating blade layer gradually increases from top to bottom.

[0014] Preferably, among the n layers of granulating blades, the angles α between the upper surfaces of the granulating blades in any two layers and the horizontal plane are different. That is, in the vertical direction, the angles α between the upper surfaces of the granulating blades in each layer and the horizontal plane decrease or increase with each layer.

[0015] Preferably, the layer-by-layer decreasing change or the layer-by-layer increasing change are both arithmetic differences.

[0016] Preferably, the system further includes a slewing bearing and a granulation barrel drive system. The bottom of the granulation barrel body is connected to the bottom of the frame via the slewing bearing. The granulation barrel drive system is disposed on one side of the exterior of the frame and connected to the slewing bearing. The granulation barrel drive system drives the slewing bearing to rotate the granulation barrel body around its own axis within the frame.

[0017] Preferably, the device further comprises a feeding mechanism, a discharging mechanism, a fixed support, and a base. The feeding mechanism is disposed at the top of the granulation barrel. The discharging mechanism is disposed at the bottom of the granulation barrel. The fixed support is disposed below the frame and connected to the frame via an adjustable bracket. The base is disposed below the fixed support and is connected between the fixed support and the base via a load cell.

[0018] Preferably, the discharge mechanism includes a discharge disc, a push rod, and a discharge drive mechanism. The discharge drive mechanism is connected to the discharge disc via the push rod, i.e., the discharge drive mechanism drives the push rod to control the opening of the discharge disc. Preferably, a motor is further provided below the discharge disc to drive the discharge disc to rotate.

[0019] Preferably, the granulation barrel is arranged in an inclined manner. The angle γ formed by the axis of the granulation barrel and the horizontal direction is 5-60°, preferably 8-50°, more preferably 10-45°, further preferably 15-40°, and even more preferably 20-35°, for example, any one of 25°, 26°, 27°, 28°, 29°, 30°, 31°, 32°, 33°, and 34°.

[0020] Preferably, the granulating paddle shaft rotates in the opposite direction of its axis to the granulating barrel. The paddle shaft preferably rotates at a speed of 50 to 1000 r / min, preferably 80 to 600 r / min, more preferably 100 to 400 r / min, and even more preferably 150 to 300 r / min. The granulating barrel preferably rotates at a speed of 2 to 20 r / min, preferably 4 to 10 r / min, and more preferably 6 to 8 r / min.

[0021] Preferably, the device further comprises a scraper. The scraper comprises a vertical section and a horizontal section. The top end of the vertical section passes through the top of the granulation barrel and is fixedly connected to the bracket. One end of the horizontal section is vertically connected to the bottom end of the vertical section, and the other end thereof points to the axial direction of the granulation barrel. The surfaces from the blade to the back of the blade of the vertical section and the horizontal section are both inclined surfaces facing in the opposite direction to the rotation direction of the granulation barrel. Preferably, the vertical distance between the horizontal section and the bottom surface of the granulation barrel is not more than 10 mm, preferably not more than 8 mm, and more preferably not more than 5 mm.

[0022] According to a second embodiment of the present invention, a method for intensified granulation using a disturbance intensified granulation system with freely adjustable blade angle is provided.

[0023] A method for enhanced granulation using a disturbance enhanced granulation system with freely adjustable blade angle, the method comprising the following steps:

[0024] 1) According to actual production needs, adjust the initial speed of the granulating paddle shaft to Z0, r / min. Adjust the average initial angle between the upper surface of the granulating paddle and the horizontal plane to α0,°.

[0025] 2) The material is conveyed into the granulation barrel. The granulation barrel drive system is activated to drive the granulation barrel to rotate along its own axis. At the same time, the granulation paddle drive device is activated to drive the granulation paddle shaft and granulation blades in the direction opposite to the rotation direction of the granulation barrel. After granulation is completed, granulated material is obtained.

[0026] 3) Detect the average particle size of the granulated material (d0, mm). According to the size of d0, adjust the speed of the granulating paddle shaft to make the particle size of the granulated material meet the actual production needs.

[0027] Preferably, in step 1), the initial rotation speed of the granulating paddle shaft is adjusted to Z0: 50 r / min to 1000 r / min, preferably 80 r / min to 600 r / min, more preferably 100 r / min to 400 r / min, and further preferably 150 r / min-300 r / min.

[0028] Preferably, in step 1), the average initial angle between the upper surface of the granulating blade and the horizontal plane is adjusted to α0:

[0029] 101) When the average particle size d0 of the granulated material required for actual production is ≤1mm, 0°<α0≤8° or 80°≤α0<90°.

[0030] 102) When the average particle size of the granulated material required for actual production is 1mm<d0≤3mm, 8°<α0≤18° or 70°≤α0<80°.

[0031] 103) When the average particle size of the granulated material required for actual production is 3mm<d0≤5mm, 18°<α0≤36° or 60°≤α0<70°.

[0032] 104) When the average particle size of the granulated material required for actual production is 5mm<d0≤8mm, 36°<α0≤45° or 55°≤α0<60°.

[0033] 105) When the average particle size of the granulated material required for actual production is 8mm<d0, 45°<α0<55°.

[0034] Preferably, the average value of the initial angle α0 between the upper surface of the granulating blade and the horizontal plane refers to:

[0035] A) When the included angle α between the upper surface of all granulating blades and the horizontal plane is the same, α0=α. When the change in the value of α0 needs to be adjusted by △α, the included angle α between the upper surface of all granulating blades and the horizontal plane needs to be adjusted by △α.

[0036] B) When the angle α between the upper surface of all granulating blades and the horizontal plane decreases or increases layer by layer, the angles between the upper surface of each layer of granulating blades and the horizontal plane in the n layers of granulating blades are set to be α1, α2, α3, ···, α n . Then α0=(α1+α1+α3+···+α n When the change value of α0 needs to be adjusted to △α, the change value of the angle α between the upper surface of all granulating blades and the horizontal plane needs to be adjusted to △α.

[0037] Preferably, step 3) is specifically as follows: setting the average particle size range of the granulated material required for actual production to [d min , d max The average particle size of the granulated material discharged from the discharge mechanism is detected and recorded as d0, mm.

[0038] 301) When d0>d max When the rotation speed of the granulating paddle shaft is reduced, d0∈[d min , d max ].

[0039] 302) When d min ≤d0≤d max When the system is in the current state, the system remains unchanged.

[0040] 303) When d0<d min When the rotation speed of the granulating paddle shaft is increased, d0∈[d min , d max ].

[0041] Preferably, step 301) is specifically as follows:

[0042] 301a) When d0>150%d max hour,

[0043] 301b) When 130% d max <d0≤150%d max hour,

[0044] 301c) when d max <d0≤130%d max hour,

[0045] Where k1, k2, and k3 are speed adjustment coefficients. The value range of k1 is 0.75-0.95, the value range of k2 is 0.4-0.75, and the value range of k3 is 0.15-0.4. Z0 is the initial speed of the granulating paddle shaft, and Z1 is the speed of the granulating paddle shaft after adjustment. By adjusting the speed of the granulating paddle shaft, the particle size of the granulated material can be controlled to meet production requirements.

[0046] Preferably, step 303) is specifically as follows:

[0047] 303a) When d0≤50%d min hour,

[0048] 303b) When 50% d min <d0≤80%d min hour,

[0049] 303c) When 80% d min <d0<d min hour,

[0050] K4, K5, and K6 are speed adjustment coefficients. K4 ranges from 0.85 to 1.1, K5 ranges from 0.45 to 0.85, and K6 ranges from 0.1 to 0.45. Z0 is the initial speed of the paddle shaft, and Z1 is the adjusted speed. By adjusting the paddle shaft speed, the particle size of the granulated material can be controlled to meet production requirements.

[0051] In the prior art, since the cylindrical granulator is set at an angle, the granulation process relies on the rolling of the cylinder to drive the rolling of the material and then lift the material. When the material is lifted to a certain height, its lifting angle is greater than the angle of repose of the material, causing the material pile to collapse, and the material to slide relatively along the surface. During the sliding process, the particles grow and granulation is achieved. In this process, the granulation effect on the material is weak. Moreover, since the material has a certain accumulation volume in the cylinder, the core material cannot obtain regular relative sliding during the above-mentioned sliding granulation process, and the granulation conditions are not met, so the granulation effect is poor. This is mainly manifested in the high requirements for the critical conditions for material granulation; such as high moisture content requirements and high adhesive ratio requirements, which leads to a high proportion of non-ferrous components in the raw materials, making it difficult to meet the requirements of modern technological progress. In addition, CN201911401704 discloses a multi-disc excitation disturbance method forced granulator, which is equipped with multiple excitation disks perpendicular to the axis of the rotating disk cluster and distributed along the axis. Although the process purpose of active granulation is achieved, the direction of the force exerted by the excitation disk on the material is relatively single, resulting in a low contact frequency between the materials and insufficient granulation efficiency.

[0052] In this invention, the granulator is equipped with an adjustable-angle, bent-end granulating blade. During the granulation process, it applies forces in different directions (F1, F2, F3, F4, and the force generated by the barrel's rotation) to the material, causing the material to roll in three dimensions and enhancing the granulation effect. Furthermore, the granulating blade can be freely adjusted in its inclination angle to ensure that the particle size of the granulated material meets production requirements.

[0053] In the present invention, the material enters the granulation barrel from the feed port at the top of the bracket and falls to the bottom of the granulation barrel. The granulation paddle drive system and the granulation barrel drive system are started, driving the granulation barrel and the granulation paddle shaft to rotate around their own axes, and the granulation paddle shaft drives the granulation blade to rotate. The end of the granulation blade is bent in the direction of movement, and the upper surface of the granulation blade is tilted toward the direction of movement of the granulation blade, so that the material is subjected to forces in both the forward and upward directions during the granulation process, causing the material to move forward and upward and roll. During the movement of the material, it continuously absorbs surrounding fine particles and gradually grows larger. When the particle size of the material meets production requirements, it is discharged from the bottom of the barrel.

[0054] In the present invention, the length of the granulating blades gradually increases from top to bottom, with the longer blades at the bottom capable of simultaneously rolling up more material particles and increasing the contact rate between materials. Because the friction between the granulating blades and the material during movement is insufficient to provide the centripetal force for material movement, the material gradually escapes from the granulating blades. Therefore, the length of the upper portion of the granulating blades is reduced. Simultaneously, as the height increases, the length of the granulating blades gradually decreases, allowing the material to escape from the granulating blades earlier after gaining sufficient kinetic energy, allowing it to move more within the granulating barrel, increasing the probability of collision between materials and improving granulation efficiency.

[0055] In the present invention, a granulating blade with an inclined upper surface and a bent end is used, such as Figure 5 As shown in the figure, the granulating blades rotate, and the material is simultaneously acted upon by the forces of F1, F2, F3, and F4. In the horizontal direction, the material is acted upon by the interlaced forces of F2 and F4. While the material moves forward, it generates two sub-velocities in different directions on the horizontal plane, causing the material particles to spin. In the vertical direction, the material is acted upon by the forces of F1 and F3, causing the material to move upward. Combined with F1, F2, F3, and F4, the material performs a three-dimensional spin motion while moving upward and forward, and continuously rotates during the process of adhering to fine particles. The fine particles adhering to the core material particles in all directions are more uniform, and the granulation effect is better. Figure 6As shown, because the granulation barrel rotates about its own axis in the opposite direction of the granulation blades, the interaction between the granulation blades and the granulation barrel creates three zones of material movement in the horizontal plane: the granulation excitation zone, the turbulent zone, and the material conveying zone, from the inside out. In the material conveying zone, the rotation of the granulation barrel drives the material particles toward the center of the barrel, where they are transported to the turbulent zone and the granulation excitation zone. In the granulation excitation zone, the granulation blades impart a forward force to the material, causing the particles to move forward and simultaneously spin horizontally. Particles from the material conveying zone and the granulation excitation zone ultimately converge in the turbulent zone. Because the material movement in these zones is in opposite directions and the material rolls under the action of the blades, the contact frequency in the turbulent zone is higher. As coarser particles roll in the horizontal plane, they continuously adhere to finer particles, forming larger particles.

[0056] In the present invention, multiple granulating blades are positioned perpendicular to the granulating paddle shaft, causing the material to spiral downward from top to bottom. Simultaneously, the upwardly moving material, under the interaction of the granulating blades, spirals within the vertical plane, simultaneously causing rolling within the vertical plane. The combined movement of the material within the horizontal and vertical planes manifests as rolling in three-dimensional space. During this rolling process, the material particles continuously adhere to fine particles, becoming larger particles and then being discharged from the bottom of the barrel. The repeated action of the high-speed granulating blades during the granulation process results in high granulation intensity and a strong drop force for the granulated material.

[0057] In the present invention, a granulating blade with a freely adjustable inclination angle is used. By changing the angle between the upper surface of the granulating blade and the horizontal plane, the direction and strength of the force exerted by the granulating blade on the material particles can be changed. When the average angle α0 between the upper surface of the granulating blade and the horizontal plane satisfies 0°<α0≤45°, the material is subjected to a greater lifting force during the production process. As α0 gradually decreases, both the lifting force and the horizontal force on the material gradually decrease, resulting in a decrease in the material's movement height and speed within the granulating barrel, a shortened granulation time, and a lowered granulation efficiency, thereby reducing the particle size of the granulated material. When 45°<α0<90°, the material is subjected to a greater horizontal force during the production process. As α0 gradually increases, the lifting force decreases and the horizontal force increases, resulting in a decrease in the material's movement height within the granulating barrel, a shortened granulation time, and a smaller particle size of the granulated material. According to actual production experience, when Z0 remains unchanged and α0 varies between 40° and 55°, the horizontal force and lifting force on the material in the granulating barrel are relatively balanced (the amplitude of change is relatively small, reaching the peak), and the lifting height and movement speed are both in an ideal state. At this time, the particle size of the granulated material obtained is the largest.

[0058] Through experiments, it was found that when the rotation speed of the granulating blade shaft is constant (for example, 150r / min-300r / min), the average particle size d0 of the granulated material required for actual production and the average angle α0 between the upper surface of the granulating blade and the horizontal plane have the following rules:

[0059] When 0°<α0≤8° or 80°≤α0<90°, the average particle size d0 of the granulated material required for actual production is ≤1mm.

[0060] When 8°<α0≤18° or 70°≤α0<80°, the average particle size of the granulated material required for actual production is 1mm<d0≤3mm.

[0061] When 18°<α0≤36° or 60°≤α0<70°, the average particle size of the granulated material required for actual production is 3mm<d0≤5mm.

[0062] When 36°<α0≤45° or 55°≤α0<60°, the average particle size of the granulated material required for actual production is 5mm<d0≤8mm.

[0063] At that time, when 45°<α0<55°, the average particle size of the granulated material required for actual production is 8mm<d0.

[0064] In the present invention, once α0 is determined, within the range of 150 r / min-300 r / min, the faster the rotation speed of the granulating paddle shaft, the greater the force exerted on the material in the granulating barrel, the faster the movement speed of the material, the higher the contact frequency, and the larger the particle size of the granulated material obtained. The slower the rotation speed, the smaller the force exerted on the material in the granulating barrel, the slower the movement speed of the material, the lower the contact frequency, and the smaller the particle size of the granulated material obtained.

[0065] In the present invention, based on the granulating blade with freely adjustable inclination angle, the present invention adopts the method of coarse adjustment and fine adjustment to control the particle size of the granulated material. According to production experience, the average value of the initial angle between the upper surface of the granulating blade and the horizontal plane is adjusted to α0, °, and the initial rotation speed of the granulating paddle shaft is adjusted to Z0, r / min (150r / min≤Z0≤300r / min). The granulated material obtained under the above production conditions is compared with the particle size of the granulated material required for production. The theoretical granulating paddle shaft rotation speed Z1 under the current α0 condition is calculated according to the formula, and the rotation speed of the granulating paddle shaft is adjusted to Z1. For adjusting the initial angle between the upper surface of the granulating blade and the horizontal plane, the machine can be stopped for adjustment or online adjustment, or the granulating paddle shaft with a granulating blade having a different inclination surface can be directly replaced.

[0066] In the present invention, as a preferred embodiment, the angle between the upper surface of the granulating blade and the horizontal plane gradually increases from bottom to top. When the material is at the bottom of the granulating barrel, it is subjected to a greater upward lifting force from the granulating blade, causing it to rise faster. When the material is in the upper middle portion of the granulating barrel, it is subjected to a greater horizontal force from the granulating blade, increasing the speed of the material's horizontal movement. In other words, the present invention gradually increases the inclination of the upper surface of the granulating blade from bottom to top, tailored to the material's motion state at different stages within the granulating barrel, conforming to the material's motion patterns and improving granulation efficiency.

[0067] In the present invention, as a preferred embodiment, multiple layers of staggered or spiral granulating blades are provided on the granulating paddle shaft. This increases the frequency of contact between the granulating blades and the material particles, imparting greater force to the material, accelerating its movement, increasing the frequency of contact between the materials, and increasing the particle size of the granulated material. Furthermore, the provision of multiple layers of staggered or spiral granulating blades prevents a small portion of the material particles from not contacting the granulating blades, which could result in large variations in the particle size of the granulated material.

[0068] In this invention, a discharge mechanism and a load cell are installed at the discharge port. The load cell carries the weight of the metering disturbance enhanced granulation system, providing real-time information on the amount of material in the barrel, providing basic data for controlling the material filling rate. A push rod can freely control the opening of the discharge disc, thereby jointly controlling the filling rate in the granulation barrel with the load cell to ensure the granulation effect. A motor rotates the discharge disc to prevent blockage of the granulation discharge port and prevent smooth discharge.

[0069] Compared with the prior art, the present invention has the following beneficial effects:

[0070] 1. The present invention adopts a granulating blade with an inclined upper surface and a bent end, which applies forces in multiple directions to the material during the granulation process, causing the material to move forward and upward while rolling, increasing the contact frequency between the materials and improving the granulation efficiency.

[0071] 2. The present invention adopts a granulating blade with a freely adjustable inclination angle. By changing the angle between the upper surface of the granulating blade and the horizontal plane, the direction of the force exerted by the granulating blade on the material particles can be changed, thereby changing the particle size of the granulated material, so that the average particle size of the material discharged by the discharge mechanism meets the production requirements.

[0072] 3. The present invention aims at the movement state of the material at different stages in the granulation barrel, so that the inclination of the upper surface of the granulation blade gradually increases from bottom to top, which conforms to the movement law of the material and improves the granulation efficiency.

[0073] 4. The present invention provides multiple layers of staggered or spirally arranged granulating blades on the granulating blade shaft to increase the contact frequency between the granulating blades and the material particles, thereby improving the granulation efficiency and preventing a small portion of the material particles from not contacting the granulating blades, resulting in a large difference in the particle size of the granulated material. BRIEF DESCRIPTION OF THE DRAWINGS

[0074] Figure 1 This is a front view of a disturbance granulation device with freely adjustable blade angle provided by the present invention.

[0075] Figure 2 This is a side view of a disturbance granulation device with freely adjustable blade angle provided by the present invention.

[0076] Figure 3 This is a schematic structural diagram of a granulation device of a disturbance granulation device with freely adjustable blade angle provided by the present invention.

[0077] Figure 4 This is a schematic structural diagram of the discharge mechanism of a disturbance granulation device with freely adjustable blade angle provided by the present invention.

[0078] Figure 5 This is a force analysis diagram of the material on the granulating blade of a disturbance granulating device with freely adjustable blade angle provided by the present invention.

[0079] Figure 6 This is a schematic diagram of the movement direction of materials in a disturbance granulation device with freely adjustable blade angle provided by the present invention.

[0080] Figure 7 a is a structural diagram of a cylindrical granulator in the prior art.

[0081] Figure 7 b is a schematic diagram of material sliding in a cylindrical granulator in the prior art.

[0082] Figure markings: 1: granulation barrel body; 2: granulation device; 201: granulation paddle shaft; 202: granulation blade; 203: granulation paddle driving device; 3: frame; 4: slewing bearing; 5: granulation barrel driving system; 6: feeding mechanism; 7: unloading mechanism; 701: unloading disc; 702: push rod; 703: unloading driving mechanism; 704: motor; 8: fixed support; 9: base; 10: adjustable bracket; 11: weighing sensor; 12: scraper; 1201: vertical section; 1202: horizontal section. DETAILED DESCRIPTION

[0083] The technical solutions of the present invention are illustrated below with examples, and the scope of protection requested by the present invention includes but is not limited to the following embodiments.

[0084] According to a first embodiment of the present invention, a disturbance-enhanced granulation system with freely adjustable blade angle is provided.

[0085] A disturbance-enhanced granulation system with freely adjustable blade angle, the system comprises a granulation barrel 1, a granulation device 2 and a frame 3. The granulation barrel 1 is a cylindrical structure, the frame 3 is a frame structure, and the granulation barrel 1 is arranged in the frame 3. The granulation device 2 comprises a granulation paddle shaft 201, a granulation blade 202 and a granulation paddle driving device 203. The granulation paddle shaft 201 and the granulation blade 202 are both arranged inside the granulation barrel 1, and the granulation paddle driving device 203 is arranged on the frame 3. The top end of the granulation paddle shaft 201 is connected to the granulation paddle driving device 203. A plurality of granulation blades 202 are evenly distributed on the granulation paddle shaft 201. The outer end portion of the granulation blade 202 away from the granulation paddle shaft 201 is designed to be bent in the direction of movement, and the upper surface of the granulation blade 202 is an inclined surface inclined in the direction of movement. Preferably, the granulating paddle shaft 201 is eccentrically arranged inside the granulating barrel 1.

[0086] Preferably, the granulating blade 202 is movably connected to the granulating blade shaft 201, so that the angle α between the upper surface of the granulating blade 202 and the horizontal plane can be freely adjusted within the range of 0-90°. Preferably, the angle α between the upper surface of the granulating blade 202 and the horizontal plane is 5-85°, preferably 10-80°, more preferably 15-75°, more preferably 20-70°, for example, any one of 22°, 24°, 26°, 28°, 30°, 32°, 34°, 36°, 38°, 40°, 42°, 44°, 46°, 48°, 50°, 52°, 54°, 56°, 58°, 60°, 62°, 64°, 66°, and 68°.

[0087] Preferably, the inner end of the granulating blade 202 is perpendicular to the shaft wall of the granulating blade shaft 201. The bending angle β formed by the bent outer end of the granulating blade 202 and the inner end of the granulating blade 202 is 95-170°, preferably 100-150°, more preferably 110-140°, for example, any one of 115°, 120°, 125°, 130°, and 135°.

[0088] Preferably, n layers of granulating blades 202 are provided on the outer surface of the granulating paddle shaft 201 from top to bottom, with each layer having 1 to 15 granulating blades 202. Preferably, each layer has 2 to 12 granulating blades 202, more preferably 3 to 10 granulating blades 202, and the granulating blades 202 on the same layer are evenly distributed around the granulating paddle shaft 201. Wherein: 1 ≤ n ≤ 30, preferably 3 ≤ n ≤ 20, more preferably 5 ≤ n ≤ 15, and n is an integer.

[0089] Preferably, the n layers of granulating blades 202 are staggered from top to bottom, that is, in the vertical direction, between any two adjacent layers of granulating blades 202, the projections of any two adjacent upper and lower granulating blades 202 do not overlap.

[0090] Preferably, n layers of granulating blades 202 are arranged in a spiral-stepped arrangement from top to bottom, i.e., in the vertical direction, when each layer of granulating blades 202 has only one granulating blade 202, all granulating blades 202 can together form a spiral-stepped granulating blade 202 array arranged from top to bottom and spiraling around the outer surface of the granulating blade shaft 201. Preferably, when each layer of granulating blades 202 has m granulating blades 202, all granulating blades 202 can together form m mutually parallel spiral-stepped granulating blade 202 arrays.

[0091] Preferably, the length of the granulating blades 202 in the n layers of granulating blades 202 gradually increases from top to bottom.

[0092] Preferably, among the n layers of granulating blades 202, the angles α between the upper surfaces of the granulating blades 202 and the horizontal plane in any two layers are different. That is, in the vertical direction, the angles α between the upper surfaces of the granulating blades 202 in each layer and the horizontal plane decrease or increase with each layer.

[0093] Preferably, the layer-by-layer decreasing change or the layer-by-layer increasing change are both arithmetic differences.

[0094] Preferably, the system further includes a slewing bearing 4 and a granulation barrel drive system 5. The bottom of the granulation barrel body 1 is connected to the bottom of the frame 3 via the slewing bearing 4. The granulation barrel drive system 5 is arranged on one side of the outside of the frame 3 and is connected to the slewing bearing 4. The granulation barrel drive system 5 drives the slewing bearing 4 to rotate the granulation barrel body 1 around its own axis within the frame 3.

[0095] Preferably, the device further comprises a feeding mechanism 6, a discharging mechanism 7, a fixed support 8 and a base 9. The feeding mechanism 6 is arranged at the top of the granulating barrel 1. The discharging mechanism 7 is arranged at the bottom of the granulating barrel 1. The fixed support 8 is arranged below the frame 3 and is connected to the frame 3 via an adjustable bracket 10. The base 9 is arranged below the fixed support 8, and the fixed support 8 and the base 9 are connected via a weighing sensor 11.

[0096] Preferably, the discharge mechanism 7 includes a discharge disc 701, a push rod 702, and a discharge drive mechanism 703. The discharge drive mechanism 703 is connected to the discharge disc 701 via the push rod 702, that is, the discharge drive mechanism 703 drives the push rod 702 to control the opening of the discharge disc 701. Preferably, a motor 704 is further provided below the discharge disc 701 to drive the discharge disc 701 to rotate.

[0097] Preferably, the granulation barrel 1 is arranged in an inclined manner. The angle γ formed by the axis of the granulation barrel 1 and the horizontal direction is 5-60°, preferably 8-50°, more preferably 10-45°, further preferably 15-40°, and even more preferably 20-35°, for example, any one of 25°, 26°, 27°, 28°, 29°, 30°, 31°, 32°, 33°, and 34°.

[0098] Preferably, the rotation direction of the granulating paddle shaft 201 along its own axis is opposite to the rotation direction of the granulating barrel 1 along its own axis. Preferably, the rotation speed of the granulating paddle shaft 201 is 50 r / min to 1000 r / min, preferably 80 r / min to 600 r / min, more preferably 100 r / min to 400 r / min, and further preferably 150 r / min to 300 r / min; the rotation speed of the granulating barrel 1 is 2 r / min to 20 r / min, preferably 4 r / min to 10 r / min, and more preferably 6 r / min to 8 r / min.

[0099] Preferably, the device further comprises a scraper 12. The scraper 12 comprises a vertical section 1201 and a horizontal section 1202. The top of the vertical section 1201 passes through the top of the granulation barrel 1 and is fixedly connected to the frame 3. One end of the horizontal section 1202 is vertically connected to the bottom end of the vertical section 1201, and the other end thereof points to the axial direction of the granulation barrel 1. The surfaces from the blade to the back of the blade of the vertical section 1201 and the horizontal section 1202 are both inclined surfaces facing in the opposite direction to the rotation direction of the granulation barrel 1. Preferably, the vertical distance between the horizontal section 1202 and the bottom surface of the granulation barrel 1 is not more than 10 mm, preferably not more than 8 mm, and more preferably not more than 5 mm.

[0100] According to a second embodiment of the present invention, a method for intensified granulation using a disturbance intensified granulation system with freely adjustable blade angle is provided.

[0101] A method for enhanced granulation using a disturbance enhanced granulation system with freely adjustable blade angle, the method comprising the following steps:

[0102] 1) According to actual production needs, the initial rotation speed of the granulating paddle shaft 201 is adjusted to Z0, r / min. The average initial angle between the upper surface of the granulating paddle 202 and the horizontal plane is adjusted to α0,°.

[0103] 2) The material is conveyed into the granulation barrel 1, and the granulation barrel drive system 5 is activated to drive the granulation barrel 1 to rotate along its own axis. At the same time, the granulation paddle drive device 203 is activated to drive the granulation paddle shaft 201 and the granulation blade 202 to rotate in the direction opposite to the rotation direction of the granulation barrel 1. After granulation is completed, granulated material is obtained.

[0104] 3) Detect the average particle size of the granulated material as d0, mm. According to the size of d0, adjust the rotation speed of the granulating paddle shaft 201 so that the particle size of the granulated material meets the actual production needs.

[0105] Preferably, in step 1), the initial rotation speed Z0 of the granulating paddle shaft 201 is adjusted to 50 r / min to 1000 r / min, preferably 80 r / min to 600 r / min, more preferably 100 r / min to 400 r / min, and further preferably 150 r / min-300 r / min.

[0106] Preferably, in step 1), the average value of the initial angle between the upper surface of the granulating blade 202 and the horizontal plane is adjusted to α0.

[0107] 101) When the average particle size d0 of the granulated material required for actual production is ≤1mm, 0°<α0≤8° or 80°≤α0<90°.

[0108] 102) When the average particle size of the granulated material required for actual production is 1mm<d0≤3mm, 8°<α0≤18° or 70°≤α0<80°.

[0109] 103) When the average particle size of the granulated material required for actual production is 3mm<d0≤5mm, 18°<α0≤36° or 60°≤α0<70°.

[0110] 104) When the average particle size of the granulated material required for actual production is 5mm<d0≤8mm, 36°<α0≤45° or 55°≤α0<60°.

[0111] 105) When the average particle size of the granulated material required for actual production is 8mm<d0, 45°<α0<55°.

[0112] Preferably, the average value of the initial angle α0 between the upper surface of the granulating blade 202 and the horizontal plane is:

[0113] A) When the angle α between the upper surface of all granulating blades 202 and the horizontal plane is the same, α0=α. When the change in the value of α0 needs to be adjusted by △α, the change in the angle α between the upper surface of all granulating blades 202 and the horizontal plane needs to be adjusted to △α;

[0114] B) When the angle α between the upper surface of all granulating blades 202 and the horizontal plane decreases or increases layer by layer, it is assumed that the angles between the upper surface of each layer of the granulating blades 202 and the horizontal plane are α1, α2, α3, ..., α n . Then α0=(α1+α1+α3+···+α n When the change value of α0 needs to be adjusted to Δα, the change value of the angle α between the upper surface of all the granulating blades 202 and the horizontal plane needs to be adjusted to Δα.

[0115] Preferably, step 3) is specifically as follows: setting the average particle size range of the granulated material required for actual production to [d min , d max The average particle size of the granulated material discharged by the discharge mechanism 7 is detected and recorded as d0, mm.

[0116] 301) When d0>d max When the rotation speed of the granulating paddle shaft 201 is reduced, d0∈[d min , d max ].

[0117] 302) When d min ≤d0≤d max When the system is in the current state, the system remains unchanged.

[0118] 303) When d0<d min When the rotation speed of the granulating paddle shaft 201 is increased, d0∈[d min , d max ].

[0119] Preferably, step 301) is specifically as follows:

[0120] 301a) When d0>150%d max hour,

[0121] 301b) When 130% d max <d0≤150%d max hour,

[0122] 301c) when d max <d0≤130%d max hour,

[0123] Where k1, k2, and k3 are speed adjustment coefficients. The value range of k1 is 0.75-0.95, the value range of k2 is 0.4-0.75, and the value range of k3 is 0.15-0.4. Z0 is the initial speed of the granulating paddle shaft 201, and Z1 is the speed of the granulating paddle shaft 201 after adjustment. By adjusting the speed of the granulating paddle shaft 201, the particle size of the granulated material is controlled to meet production requirements.

[0124] Preferably, step 303) is specifically as follows:

[0125] 303a) When d0≤50%d min hour,

[0126] 303b) When 50% d min <d0≤80%d min hour,

[0127] 303c) When 80% d min <d0<d min hour,

[0128] Wherein, k4, k5, and k6 are speed adjustment coefficients. The value range of k4 is 0.85-1.1, the value range of k5 is 0.45-0.85, and the value range of k6 is 0.1-0.45. Z0 is the initial speed of the granulating paddle shaft 201, and Z1 is the speed of the granulating paddle shaft 201 after adjustment. By adjusting the speed of the granulating paddle shaft 201, the particle size of the granulated material is controlled to meet production requirements.

[0129] Example 1

[0130] A disturbance-enhanced granulation system with freely adjustable blade angle, the system comprises a granulation barrel 1, a granulation device 2 and a frame 3. The granulation barrel 1 is a cylindrical structure, the frame 3 is a frame structure, and the granulation barrel 1 is arranged in the frame 3. The granulation device 2 comprises a granulation paddle shaft 201, a granulation blade 202 and a granulation paddle driving device 203. The granulation paddle shaft 201 and the granulation blade 202 are both arranged inside the granulation barrel 1, and the granulation paddle driving device 203 is arranged on the frame 3. The top end of the granulation paddle shaft 201 is connected to the granulation paddle driving device 203. A plurality of granulation blades 202 are evenly distributed on the granulation paddle shaft 201. The outer end portion of the granulation blade 202 away from the granulation paddle shaft 201 is designed to be bent in the direction of movement, and the upper surface of the granulation blade 202 is an inclined surface inclined in the direction of movement. The granulating paddle shaft 201 is eccentrically arranged inside the granulating barrel 1 .

[0131] Example 2

[0132] Example 1 was repeated, except that the granulating blade 202 was movably connected to the granulating blade shaft 201, so that the angle α between the upper surface of the granulating blade 202 and the horizontal plane could be freely adjusted within the range of 0-90°. The angle between the upper surface of the granulating blade 202 and the horizontal plane was 45°.

[0133] The inner end of the granulating blade 202 is perpendicular to the shaft wall of the granulating blade shaft 201. The bending angle β formed by the bent outer end of the granulating blade 202 and the inner end of the granulating blade 202 is 120°.

[0134] Example 3

[0135] Example 2 was repeated, except that five layers of granulating blades 202 were provided from top to bottom on the outer surface of the granulating paddle shaft 201, with each layer having eight granulating blades 202. The granulating blades 202 on the same layer were evenly distributed around the granulating paddle shaft 201.

[0136] Example 4

[0137] Example 3 was repeated, except that the five layers of granulating blades 202 were arranged in a staggered distribution from top to bottom, that is, in the vertical direction, between any two adjacent layers of granulating blades 202, the projections of any two adjacent upper and lower granulating blades 202 did not overlap.

[0138] Example 5

[0139] Example 3 is repeated, except that the five layers of granulating blades 202 are arranged in a spiral stepped manner from top to bottom. In the vertical direction, each layer of granulating blades 202 has only one granulating blade 202, and all the granulating blades 202 together constitute a spiral stepped granulating blade 202 group arranged on the outer surface of the granulating blade shaft 201 from top to bottom.

[0140] Example 6

[0141] Example 3 is repeated, except that each layer of granulating blades 202 has 8 granulating blades 202, and all granulating blades 202 together form 8 parallel spiral stepped granulating blade 202 groups.

[0142] The length of the granulating blades 202 in the five layers of granulating blades 202 gradually increases from top to bottom.

[0143] Example 7

[0144] Example 4 was repeated, except that the angle α between the upper surface of the granulating blades 202 and the horizontal plane in any two layers of the granulating blades 202 was different. That is, in the vertical direction, the angle α between the upper surface of the granulating blades 202 and the horizontal plane in each layer increased from bottom to top.

[0145] The layer-by-layer incremental change is an arithmetic difference change.

[0146] Example 8

[0147] Example 7 is repeated, except that the system further includes a slewing bearing 4 and a granulation barrel drive system 5. The bottom of the granulation barrel body 1 is connected to the bottom of the frame 3 via the slewing bearing 4. The granulation barrel drive system 5 is arranged on one side of the outside of the frame 3 and connected to the slewing bearing 4. The granulation barrel drive system 5 drives the slewing bearing 4 to rotate the granulation barrel body 1 around its own axis within the frame 3.

[0148] Example 9

[0149] Example 8 was repeated, except that the device further included a feeding mechanism 6, a discharging mechanism 7, a fixed support 8, and a base 9. The feeding mechanism 6 was disposed on the top of the granulation barrel 1. The discharging mechanism 7 was disposed on the bottom of the granulation barrel 1. The fixed support 8 was disposed below the frame 3 and connected to the frame 3 via an adjustable bracket 10. The base 9 was disposed below the fixed support 8, and a weighing sensor 11 was connected between the fixed support 8 and the base 9.

[0150] Example 10

[0151] Example 9 is repeated, except that the discharge mechanism 7 includes a discharge disc 701, a push rod 702, and a discharge drive mechanism 703. The discharge drive mechanism 703 is connected to the discharge disc 701 via the push rod 702. That is, the discharge drive mechanism 703 drives the push rod 702 to control the opening of the discharge disc 701. A motor 704 is also provided below the discharge disc 701 to drive the discharge disc 701 to rotate.

[0152] Example 11

[0153] Example 10 was repeated, except that the granulating barrel 1 was tilted and the angle γ between the axis of the granulating barrel 1 and the horizontal direction was 30°.

[0154] The rotation direction of the granulating paddle shaft 201 along its own axis is opposite to the rotation direction of the granulating barrel 1 along its own axis. The rotation speed of the granulating paddle shaft 201 is 200r / min, and the rotation speed of the granulating barrel 1 is 6r / min.

[0155] Example 12

[0156] Example 10 was repeated, except that the granulating barrel 1 was tilted and the angle γ between the axis of the granulating barrel 1 and the horizontal direction was 25°.

[0157] The rotation direction of the granulating paddle shaft 201 along its own axis is opposite to the rotation direction of the granulating barrel 1 along its own axis. The rotation speed of the granulating paddle shaft 201 is 180r / min, and the rotation speed of the granulating barrel 1 is 7r / min.

[0158] Example 13

[0159] Example 10 was repeated, except that the granulating barrel 1 was tilted and the angle γ between the axis of the granulating barrel 1 and the horizontal direction was 34°.

[0160] The rotation direction of the granulating paddle shaft 201 along its own axis is opposite to the rotation direction of the granulating barrel 1 along its own axis. The rotation speed of the granulating paddle shaft 201 is 160r / min, and the rotation speed of the granulating barrel 1 is 8r / min.

[0161] Example 14

[0162] Repeat Example 11, except that the device further includes a scraper 12. The scraper 12 includes a vertical section 1201 and a horizontal section 1202. The top of the vertical section 1201 passes through the top of the granulation barrel 1 and is fixedly connected to the frame 3. One end of the horizontal section 1202 is vertically connected to the bottom end of the vertical section 1201, and the other end thereof points to the axial direction of the granulation barrel 1. The surfaces from the blade to the back of the blade of the vertical section 1201 and the horizontal section 1202 are both inclined surfaces facing in the opposite direction to the rotation direction of the granulation barrel 1. The vertical distance between the horizontal section 1202 and the bottom surface of the granulation barrel 1 is not more than 5 mm.

[0163] Application Example 1

[0164] The device described in Example 14 was applied to the granulation of fine iron ore. The particle size of the granulated material required for production was 4 mm. The average initial angle α0 between the upper surface of the granulating blade 202 and the horizontal plane was adjusted to 25°. The initial rotation speed Z0 of the granulating paddle shaft 201 was set to 240 r / min. The material was transported into the granulating barrel 1. The granulating barrel drive system was started to drive the granulating barrel 1 to rotate along its own axis. At the same time, the granulating paddle drive device 203 was started to drive the granulating paddle shaft 201 and the granulating paddle 202 to rotate in the direction opposite to the rotation direction of the granulating barrel 1. After the granulation was completed, the granulated material was obtained. The average particle size of the granulated material was detected to be d0 = 6 mm. The rotation speed of the granulating paddle shaft 201 was adjusted:

[0165] Since 130%d max <d0≤150%d max ,

[0166] The value of k2 is 0.45, and the rotation speed of the granulating paddle shaft 201 is adjusted to 186 r / min, so that the particle size of the granulated material meets the production requirements.

[0167] Application Example 2

[0168] The device described in Example 14 was applied to the granulation of fine iron ore. The average particle size of the granulated material required for production was 6 mm. The average initial angle α0 between the upper surface of the granulating blade 202 and the horizontal plane was adjusted to 43°. The initial rotation speed Z0 of the granulating paddle shaft 201 was set to 300 r / min. The material was transported into the granulating barrel 1. The granulating barrel drive system was started to drive the granulating barrel 1 to rotate along its own axis. At the same time, the granulating paddle drive device 203 was started to drive the granulating paddle shaft 201 and the granulating paddle 202 to rotate in the direction opposite to the rotation direction of the granulating barrel 1. After the granulation was completed, the granulated material was obtained. The average particle size d0 of the granulated material was detected to be 10 mm. The rotation speed of the granulating paddle shaft 201 was adjusted:

[0169] Since d0>150%d max ,

[0170] The value of k1 is 0.7, and the rotation speed of the granulating paddle shaft 201 is adjusted to 160 r / min, so that the particle size of the granulated material meets the production requirements.

[0171] Application Example 3

[0172] The device described in Example 14 was applied to the granulation of fine iron ore. The average particle size of the granulated material required for production was 10 mm. The average initial angle α0 between the upper surface of the granulating blade 202 and the horizontal plane was adjusted to 43°. The initial rotation speed Z0 of the granulating paddle shaft 201 was set to 260 r / min. The material was transported into the granulating barrel 1. The granulating barrel drive system was started to drive the granulating barrel 1 to rotate along its own axis. At the same time, the granulating paddle drive device 203 was started to drive the granulating paddle shaft 201 and the granulating paddle 202 to rotate in the direction opposite to the rotation direction of the granulating barrel 1. After the granulation was completed, the granulated material was obtained. The average particle size d0 of the granulated material was detected to be 12 mm. The rotation speed of the granulating paddle shaft 201 was adjusted:

[0173] Due to d max <d0≤130%d max ,

[0174] The value of k3 is 0.3, and the rotation speed of the granulating paddle shaft 201 is adjusted to 244.4 r / min, so that the particle size of the granulated material meets the production requirements.

[0175] Application Example 4

[0176] The apparatus described in Example 14 was applied to the granulation of fine iron ore. The average particle size of the granulated material required for production was 5 mm. The average initial angle α0 between the upper surface of the granulating blade 202 and the horizontal plane was adjusted to 32°, and the initial rotation speed Z0 of the granulating paddle shaft 201 was set to 190 r / min. The material was conveyed into the granulating barrel 1. The granulating barrel drive system was activated to drive the granulating barrel 1 to rotate along its own axis. Simultaneously, the granulating paddle drive device 203 was activated to drive the granulating paddle shaft 201 and the granulating paddle 202 to rotate in a direction opposite to the rotation direction of the granulating barrel 1. After granulation was completed, granulated material was obtained. The average particle size d0 of the granulated material was measured to be 5 mm, which met the production requirements.

[0177] Application Example 5

[0178] The device described in Example 14 was applied to the granulation of fine iron ore. The average particle size of the granulated material required for production was 7 mm. The average initial angle α0 between the upper surface of the granulating blade 202 and the horizontal plane was adjusted to 40°. The initial rotation speed Z0 of the granulating paddle shaft 201 was set to 200 r / min. The material was transported into the granulating barrel 1. The granulating barrel drive system was started to drive the granulating barrel 1 to rotate along its own axis. At the same time, the granulating paddle drive device 203 was started to drive the granulating paddle shaft 201 and the granulating paddle 202 to rotate in the direction opposite to the rotation direction of the granulating barrel 1. After the granulation was completed, the granulated material was obtained. The average particle size of the granulated material was detected to be d0 = 6 mm. The rotation speed of the granulating paddle shaft 201 was adjusted:

[0179] Since 80% d min <d0<d min ,

[0180] The value of k6 is 0.4, and the rotation speed of the granulating paddle shaft 201 is adjusted to 211 r / min, so that the particle size of the granulated material meets the production requirements.

[0181] Application Example 6

[0182] The device described in Example 14 was applied to the granulation of fine iron ore. The average particle size of the granulated material required for production was 8 mm. The average initial angle α0 between the upper surface of the granulating blade 202 and the horizontal plane was adjusted to 45°. The initial rotation speed Z0 of the granulating paddle shaft 201 was set to 200 r / min. The material was transported into the granulating barrel 1. The granulating barrel drive system was started to drive the granulating barrel 1 to rotate along its own axis. At the same time, the granulating paddle drive device 203 was started to drive the granulating paddle shaft 201 and the granulating paddle 202 to rotate in the direction opposite to the rotation direction of the granulating barrel 1. After the granulation was completed, the granulated material was obtained. The average particle size of the granulated material was detected to be d0 = 5 mm. The rotation speed of the granulating paddle shaft 201 was adjusted:

[0183] Since 50% d min <d0≤80%d min ,

[0184] The value of k5 is 0.65, and the rotation speed of the granulating paddle shaft 201 is adjusted to 258.75 r / min, so that the particle size of the granulated material meets the production requirements.

[0185] Application Example 7

[0186] The device described in Example 14 was applied to the granulation of fine iron ore. The average particle size of the granulated material required for production was 13 mm. The average initial angle α0 between the upper surface of the granulating blade 202 and the horizontal plane was adjusted to 52°. The initial rotation speed Z0 of the granulating paddle shaft 201 was set to 160 r / min. The material was transported into the granulating barrel 1. The granulating barrel drive system was started to drive the granulating barrel 1 to rotate along its own axis. At the same time, the granulating paddle drive device 203 was started to drive the granulating paddle shaft 201 and the granulating paddle 202 to rotate in the direction opposite to the rotation direction of the granulating barrel 1. After granulation, the granulated material was obtained. The average particle size of the granulated material was detected to be d0 = 6 mm. The rotation speed of the granulating paddle shaft 201 was adjusted:

[0187] Since d0≤50%d min ,

[0188] The value of k4 is 0.9, and the rotation speed of the granulating paddle shaft 201 is adjusted to 237.5 r / min, so that the particle size of the granulated material meets the production requirements.

Claims

1. A disturbance-enhanced granulation system with freely adjustable blade angle, characterized by: The system comprises a granulating barrel (1), a granulating device (2) and a frame (3); the granulating barrel (1) is a cylindrical structure, the frame (3) is a frame structure, and the granulating barrel (1) is arranged in the frame (3); the granulating device (2) comprises a granulating paddle shaft (201), a granulating paddle (202) and a granulating paddle driving device (203); the granulating paddle shaft (201) and the granulating paddle (202) are both arranged in the interior of the granulating barrel (1), and the granulating paddle driving device (203) is arranged on the frame (3); the top end of the granulating paddle shaft (201) is in contact with the granulating paddle driving device (203); ) are connected; a plurality of granulating blades (202) are evenly distributed on the granulating blade shaft (201); a section of the outer end of the granulating blade (202) away from the granulating blade shaft (201) is designed to be bent in the direction of movement, and the upper surface of the granulating blade (202) is an inclined surface inclined in the direction of movement; the granulating paddle shaft (201) is eccentrically arranged inside the granulating barrel (1); the granulating blade (202) and the granulating paddle shaft (201) are movably connected, so that the angle α between the upper surface of the granulating blade (202) and the horizontal plane can be freely adjusted within the range of 0-90°.

2. The system according to claim 1, wherein: The angle α between the upper surface of the granulating blade (202) and the horizontal plane is any angle between 5° and 85°.

3. The system according to claim 2, characterized in that: The angle α between the upper surface of the granulating blade (202) and the horizontal plane is any angle between 10° and 80°.

4. The system according to claim 3, wherein: The angle α between the upper surface of the granulating blade (202) and the horizontal plane is any angle between 15° and 75°.

5. The system according to claim 4, characterized in that: The angle α between the upper surface of the granulating blade (202) and the horizontal plane is any angle between 20° and 70°.

6. The system according to claim 2, characterized in that: The inner end of the granulating blade (202) is perpendicular to the shaft wall of the granulating blade shaft (201); and the bending angle β formed by the bent outer end of the granulating blade (202) and the inner end of the granulating blade (202) is any angle between 95° and 170°.

7. The system according to claim 6, characterized in that: The bending angle β formed by the bent outer end of the granulating blade (202) and the inner end of the granulating blade (202) is any angle between 100° and 150°.

8. The system according to claim 7, characterized in that: The bending angle β formed by the bent outer end of the granulating blade (202) and the inner end of the granulating blade (202) is any angle between 110° and 140°.

9. The system according to claim 1, wherein: On the outer surface of the granulating paddle shaft (201), n ​​layers of granulating blades (202) are provided from top to bottom, with each layer provided with 1 to 15 granulating blades (202); and the granulating blades (202) located in the same layer are evenly distributed around the granulating paddle shaft (201); wherein: 1≤n≤30, and n is an integer.

10. The system according to claim 9, characterized in that: Each layer is provided with 2 to 12 granulating blades (202); 3≤n≤20.

11. The system according to claim 10, characterized in that: Each layer is provided with 3 to 10 granulating blades (202); wherein: 5≤n≤15.

12. The system according to claim 9, wherein: The n layers of granulating blades (202) are arranged in a staggered distribution from top to bottom, that is, in the vertical direction, between any two adjacent layers of granulating blades (202), the projections of any two adjacent upper and lower granulating blades (202) do not overlap.

13. The system according to claim 12, characterized in that: The n layers of granulating blades (202) are arranged in a spiral stepped distribution from top to bottom, that is, in the vertical direction, when each layer of granulating blades (202) has only one granulating blade (202), all the granulating blades (202) can together form a spiral stepped granulating blade (202) group arranged from top to bottom and spiraling around the outer surface of the granulating blade shaft (201).

14. The system according to claim 13, wherein: When each layer of granulating blades (202) has m granulating blades (202), all the granulating blades (202) can together form m mutually parallel spiral stepped granulating blade (202) groups.

15. The system according to claim 9, wherein: The length of the granulating blades (202) in the n layers of granulating blades (202) gradually increases from top to bottom.

16. The system according to claim 9, wherein: In the n layers of granulating blades (202), the sizes of the angles α between the upper surfaces of the granulating blades (202) of any two layers and the horizontal plane are different; that is, in the vertical direction, the sizes of the angles α between the upper surfaces of the granulating blades (202) of each layer and the horizontal plane decrease or increase layer by layer.

17. The system according to claim 16, characterized in that: The layer-by-layer decreasing change or layer-by-layer increasing change are both arithmetic differences.

18. The system according to any one of claims 1 to 17, characterized in that: The system further comprises a slewing bearing (4) and a granulating barrel driving system (5); the bottom of the granulating barrel body (1) and the bottom of the frame (3) are connected via the slewing bearing (4); the granulating barrel driving system (5) is arranged on one side outside the frame (3) and connected to the slewing bearing (4); the granulating barrel driving system (5) drives the slewing bearing (4) to rotate the granulating barrel body (1) around its own axis in the frame (3).

19. The system according to claim 18, characterized in that: The device further comprises a feeding mechanism (6), a discharging mechanism (7), a fixed support (8) and a base (9); the feeding mechanism (6) is arranged on the top of the granulating barrel (1); the discharging mechanism (7) is arranged at the bottom of the granulating barrel (1); the fixed support (8) is arranged below the frame (3) and is connected to the frame (3) via an adjustable bracket (10); the base (9) is arranged below the fixed support (8), and a weighing sensor (11) is connected between the fixed support (8) and the base (9).

20. The system according to claim 19, characterized in that: The unloading mechanism (7) comprises a unloading disc (701), a push rod (702) and a unloading drive mechanism (703); the unloading drive mechanism (703) is connected to the unloading disc (701) via the push rod (702), that is, the unloading drive mechanism (703) drives the push rod (702) to control the opening of the unloading disc (701).

21. The system according to claim 20, characterized in that: A motor (704) is further provided below the discharge disc (701), and the motor (704) can drive the discharge disc (701) to rotate.

22. The system according to any one of claims 1 to 17, 19 to 21, characterized in that: The granulation barrel (1) is arranged in an inclined manner; the angle γ formed by the axis of the granulation barrel (1) and the horizontal direction is any angle between 5° and 60°.

23. The system according to claim 18, wherein: The granulation barrel (1) is arranged in an inclined manner; the angle γ formed by the axis of the granulation barrel (1) and the horizontal direction is any angle between 5° and 60°.

24. The system according to claim 22, wherein: The angle γ formed between the axis of the granulating barrel (1) and the horizontal direction is any angle between 8° and 50°.

25. The system according to claim 23, wherein: The angle γ formed between the axis of the granulating barrel (1) and the horizontal direction is any angle between 8° and 50°.

26. The system according to claim 24 or 25, characterized in that: The angle γ formed between the axis of the granulating barrel (1) and the horizontal direction is any angle between 10° and 45°.

27. The system according to claim 26, characterized in that: The angle γ formed between the axis of the granulating barrel (1) and the horizontal direction is any angle between 15° and 40°.

28. The system according to claim 26, wherein: The angle γ formed between the axis of the granulating barrel (1) and the horizontal direction is any angle between 20° and 35°.

29. The system according to claim 22, wherein: The rotation direction of the granulating paddle shaft (201) along its own axis is opposite to the rotation direction of the granulating barrel (1) along its own axis.

30. The system according to claim 23, wherein: The rotation direction of the granulating paddle shaft (201) along its own axis is opposite to the rotation direction of the granulating barrel (1) along its own axis.

31. The system according to claim 22, wherein: The rotation speed of the granulating paddle shaft (201) is 50 r / min to 1000 r / min; the rotation speed of the granulating barrel (1) is 2 r / min to 20 r / min.

32. The system according to claim 23, wherein: The rotation speed of the granulating paddle shaft (201) is 50 r / min to 1000 r / min; the rotation speed of the granulating barrel (1) is 2 r / min to 20 r / min.

33. The system according to claim 31 or 32, characterized in that: The rotation speed of the granulating paddle shaft (201) is 80 r / min to 600 r / min; the rotation speed of the granulating barrel (1) is 4 r / min to 10 r / min.

34. The system according to claim 33, wherein: The rotation speed of the granulating paddle shaft (201) is 100 r / min to 400 r / min; the rotation speed of the granulating barrel (1) is 6 r / min to 8 r / min.

35. The system according to any one of claims 1-17, 19-21, 23-25, 27-32, 34, characterized in that: The device further comprises a scraper (12); the scraper (12) comprises a vertical section (1201) and a horizontal section (1202); the top end of the vertical section (1201) passes through the top of the granulating barrel (1) and is fixedly connected to the frame (3); one end of the horizontal section (1202) is vertically connected to the bottom end of the vertical section (1201), and the other end thereof points in the axial direction of the granulating barrel (1); the surfaces from the blade to the back of the blade of the vertical section (1201) and the horizontal section (1202) are both inclined surfaces facing in the opposite direction to the rotation direction of the granulating barrel (1).

36. The system according to claim 18, wherein: The device further comprises a scraper (12); the scraper (12) comprises a vertical section (1201) and a horizontal section (1202); the top end of the vertical section (1201) passes through the top of the granulating barrel (1) and is fixedly connected to the frame (3); one end of the horizontal section (1202) is vertically connected to the bottom end of the vertical section (1201), and the other end thereof points in the axial direction of the granulating barrel (1); the surfaces from the blade to the back of the blade of the vertical section (1201) and the horizontal section (1202) are both inclined surfaces facing in the opposite direction to the rotation direction of the granulating barrel (1).

37. The system according to claim 35, wherein: The vertical distance between the horizontal section (1202) and the bottom surface of the granulation barrel (1) is no more than 10 mm.

38. The system according to claim 36, wherein: The vertical distance between the horizontal section (1202) and the bottom surface of the granulation barrel (1) is no more than 10 mm.

39. The system according to claim 37 or 38, characterized in that: The vertical distance between the horizontal section (1202) and the bottom surface of the granulation barrel (1) is no more than 8 mm.

40. The system according to claim 39, wherein: The vertical distance between the horizontal section (1202) and the bottom surface of the granulation barrel (1) is no more than 5 mm.

41. A method for enhanced granulation using the disturbance enhanced granulation system with freely adjustable blade angle according to any one of claims 1 to 40, the method comprising the following steps: 1) According to actual production needs, the initial rotation speed of the granulating paddle shaft (201) is adjusted to Z0, r / min; the average value of the initial angle between the upper surface of the granulating paddle (202) and the horizontal plane is adjusted to α0,°; 2) conveying the material into the granulation barrel (1), starting the granulation barrel drive system (5) to drive the granulation barrel (1) to rotate along its own axis, and simultaneously starting the granulation paddle drive device (203) to drive the granulation paddle shaft (201) and the granulation paddle (202) to rotate in a direction opposite to the rotation direction of the granulation barrel (1); after the granulation is completed, the granulated material is obtained; 3) detecting the average particle size of the granulated material as d0; and adjusting the rotation speed of the granulating paddle shaft (201) according to the size of d0 so that the particle size of the granulated material meets actual production needs.

42. The method according to claim 41, wherein: In step 1), the initial rotation speed of the granulating paddle shaft (201) is adjusted to Z0: 50 r / min to 1000 r / min; and / or The average value of the initial angle between the upper surface of the granulating blade (202) and the horizontal plane is adjusted to α0: 101) When the average particle size d0 of the granulated material required for actual production is ≤1mm, 0°<α0≤8° or 80°≤α0<90°; 102) When the average particle size of the granulated material required for actual production is 1mm<d0≤3mm, 8°<α0≤18° or 70°≤α0<80°; 103) When the average particle size of the granulated material required for actual production is 3mm<d0≤5mm, 18°<α0≤36° or 60°≤α0<70°; 104) When the average particle size of the granulated material required for actual production is 5mm<d0≤8mm, 36°<α0≤45° or 55°≤α0<60°; 105) When the average particle size of the granulated material required for actual production is 8mm<d0, 45°<α0<55°.

43. The method according to claim 42, wherein: In step 1), the initial rotation speed Z0 of the granulating paddle shaft (201) is adjusted to 80 r / min to 600 r / min.

44. The method according to claim 43, wherein: In step 1), the initial rotation speed Z0 of the granulating paddle shaft (201) is adjusted to 100 r / min to 400 r / min.

45. The method according to claim 44, characterized in that: In step 1), the initial rotation speed Z of the granulating paddle shaft (201) is adjusted to 150 r / min-300 r / min.

46. ​​The method according to claim 42, wherein: The average value of the initial angle α0 between the upper surface of the granulating blade (202) and the horizontal plane is: A) when the angle α between the upper surface of all granulating blades (202) and the horizontal plane is the same, α0=α; when the change value of the value of α0 needs to be adjusted by △α, the change value of the angle α between the upper surface of all granulating blades (202) and the horizontal plane needs to be adjusted by △α; B) When the angle α between the upper surface of all the granulating blades (202) and the horizontal plane changes gradually decreasing or increasing layer by layer, it is assumed that the angle between the upper surface of each layer of the granulating blades (202) and the horizontal plane in the n layers of granulating blades (202) from top to bottom is α1, α2, α3, ···, α n ;Then α0=(α1+α1+α3+···+α n ) / n; when the change value of the value of α0 that needs to be adjusted is △α, the change value of the angle α between the upper surface of all the granulating blades (202) and the horizontal plane needs to be adjusted to △α.

47. The method according to claim 42, wherein: Step 3) is specifically as follows: setting the average particle size range of the granulated material required for actual production to [d min , d max ]; the average particle size of the granulated material discharged by the discharge mechanism (7) is detected and recorded as d0; 301) When d0>d max When the rotation speed of the granulating paddle shaft (201) is reduced, d0∈[d min , d max ]; 302) When d min ≤d0≤d max When , the current state of the system remains unchanged; 303) When d0<d min When the rotation speed of the granulating paddle shaft (201) is increased, d0∈[d min , d max ].

48. The method according to claim 47, wherein: Step 301) is specifically as follows: 301a) When d0>150%d max hour, 301b) When 130% d max <d0≤150%d max hour, 301c) when d max <d0≤130%d max hour, Among them, k1, k2, and k3 are speed adjustment coefficients, the value range of k1 is 0.75-0.95, the value range of k2 is 0.4-0.75, and the value range of k3 is 0.15-0.4; Z0 is the initial speed of the granulating paddle shaft (201), and Z1 is the speed of the granulating paddle shaft (201) after adjustment; by adjusting the speed of the granulating paddle shaft (201), the particle size of the granulated material is controlled to meet production requirements.

49. The method according to claim 47 or 48, wherein: Step 303) is specifically as follows: 303a) When d0≤50%d min hour, 303b) When 50% d min <d0≤80%d min hour, 303c) When 80% d min <d0<d min hour, Among them, k4, k5, and k6 are speed adjustment coefficients, the value range of k4 is 0.85 to 1.1, the value range of k5 is 0.45 to 0.85, and the value range of k6 is 0.1 to 0.45; Z0 is the initial speed of the granulating paddle shaft (201), and Z1 is the speed of the granulating paddle shaft (201) after adjustment; by adjusting the speed of the granulating paddle shaft (201), the particle size of the granulated material is controlled to meet production requirements.

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