Crushing, grading and waste heat recovery all-in-one machine for high-temperature steel slag

Abstract

The invention relates to the technical field of iron and steel smelting, in particular to a high-temperature steel slag crushing, grading and waste heat recovery all-in-one machine which comprises a steel slag crushing bin, a steel slag grading bin, a crushing mechanism and a grading mechanism, the steel slag crushing bin is provided with a conveying channel and a slag outlet, and the crushing mechanism reciprocates along the crushing channel; the steel slag classification bin is communicated with the steel slag crushing bin through the slag outlet, and the classification mechanism outputs the steel slag from different classification outlets according to the granularity of the steel slag in the steel slag classification bin; the bin wall of the steel slag crushing bin and the bin wall of the steel slag grading bin are provided with first interlayer cavities capable of allowing water to pass through and exhausting air, water can pass through the first interlayer cavities so that steel slag can be cooled, waste heat of the steel slag can be used for heating water into steam to be used, a fourth interlayer cavity is formed in the grading mechanism, and a second interlayer cavity is formed in a flue gas channel in the steel slag crushing bin. And the fourth interlayer cavity and the second interlayer cavity are communicated with the first interlayer cavity.

Description

Technical Field

[0001] The invention relates to the technical field of steel smelting, and in particular to an integrated machine for crushing, grading and recovering waste heat of high-temperature slag. Background Art

[0002] At present, the steel slag produced by steelmaking is mostly treated by the hot stewing method. The hot stewing method is to cool the high-temperature steel slag to 400-500℃, and crush it to the specified particle size, then pour the steel slag into a stewing tank or a hot stewing pool, and then carry out a series of treatments such as water cooling, crushing, and magnetic separation.

[0003] When the slag is taken out of the smelting furnace and transferred to the cooling equipment, the temperature is about 800-1000℃, and the slag is a mixture of molten and solid. Since the hot stewing treatment of slag has temperature and particle size requirements, the slag needs to be cooled to the required temperature and crushed to the required size before hot stewing. It takes a long time to cool the slag, so this treatment method is not only time-consuming and inefficient, but also leads to a lot of heat being wasted, and the piled up cooled slag will also take up a lot of space. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide an integrated machine for crushing, grading and recovering waste heat of high-temperature steel slag, which can accelerate the cooling rate of the steel slag, utilize the heat of the steel slag, and crush the steel slag during the cooling process, effectively improving the efficiency of cooling and crushing the steel slag.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: a high-temperature steel slag crushing, grading and waste heat recovery integrated machine, including a steel slag crushing bin, a steel slag grading bin, a crushing mechanism and a grading mechanism, the steel slag crushing bin is provided with a slag inlet and a slag outlet, a conveying channel is provided between the slag inlet and the slag outlet in the steel slag crushing bin, an avoidance hole is provided on the side wall of the steel slag crushing bin along the conveying channel, the crushing mechanism includes a crushing roller, a crushing drive and a travel drive, the crushing roller is arranged through the avoidance hole, the crushing roller is driven to rotate by the crushing drive and driven by the travel drive It is driven to move back and forth along the conveying channel. Crushing teeth are arranged on the crushing roller at the corresponding conveying channel. The crushing teeth move with the crushing roller and crush the steel slag in the crushing channel and push it to the slag outlet. The steel slag classification bin is arranged at the slag outlet. The steel slag classification bin is connected with the steel slag crushing bin and the steel slag classification bin is provided with at least two classification outlets. The classification mechanism is arranged in the steel slag classification bin and outputs the steel slag from the designated classification outlet according to the particle size of the steel slag. The first interlayer cavity is arranged on the bin wall of the steel slag classification bin and the bin wall of the steel slag crushing bin. The first interlayer cavity is provided with a water injection interface and an exhaust interface. The crushing mechanism is in the steel slag crushing bin. While crushing the steel slag, it pushes the steel slag to the slag outlet. The classification mechanism discharges the steel slag in the steel slag classification bin according to the steel slag particle size. The bin wall of the steel slag crushing bin and the steel slag classification bin are both provided with the first interlayer cavity. The heat of the steel slag is used to heat the water in the first interlayer cavity into a gaseous state, which is not only conducive to cooling the steel slag, but also can make full use of the waste heat of the steel slag.

[0006] As an optional technical solution of the present invention, the steel slag crushing bin is provided with a smoke outlet, a smoke channel is provided in the steel slag crushing bin, the smoke channel is communicated with the smoke outlet, a second interlayer cavity is provided on the channel wall of the smoke channel, and the second interlayer cavity is communicated with the first interlayer cavity. The high-temperature smoke of the steel slag can be discharged by the smoke channel, and the heat of the high-temperature smoke can be utilized.

[0007] As an optional technical solution of the present invention, at least one baffle is provided in the smoke channel, a third interlayer cavity is provided in the baffle, and the third interlayer cavity is communicated with the second interlayer cavity and / or the first interlayer cavity. The baffle is provided in the smoke channel to extend the travel distance of the high-temperature smoke and improve the utilization effect of the heat of the high-temperature smoke.

[0008] As an optional technical solution of the present invention, the grading mechanism includes a grading screen, the grading screen is provided with a fourth interlayer cavity, and the fourth interlayer cavity is communicated with the first interlayer cavity; the flue gas inlet of the flue gas channel is arranged above the grading screen. The fourth interlayer cavity is arranged in the grading screen, which is conducive to cooling the steel slag when grading the steel slag and improving the utilization efficiency of the waste heat of the steel slag.

[0009] As an optional technical solution of the present invention, the slag grading bin is provided with two grading outlets, namely a first grading outlet and a second grading outlet. The grading screen is arranged above the first grading outlet, and the screen surface is inclined toward the direction of the second grading outlet.

[0010] As an optional technical solution of the present invention, the grading screen includes a fixed grading screen and a vibrating grading screen. A vibrating mounting part is provided above the first grading outlet. The vibrating grading screen is provided above the first grading outlet through the vibrating mounting part, and is driven to vibrate by a vibrating driving part provided outside the slag grading bin. The lower end of the vibrating grading screen is at the second grading outlet. The fixed grading screen is connected to the bin wall of the slag grading bin, and the lower end of the fixed grading screen is above the vibrating grading screen. After the slag enters the slag grading bin, it first falls onto the fixed grading screen, and then disperses to the vibrating grading screen along the fixed grading screen. The fixed grading screen and the vibrating grading screen cooperate to achieve the grading and screening effect of the slag, and also prevent the vibrating grading screen from being continuously impacted by the slag and damaged.

[0011] As an optional technical solution of the present invention, a double-roll crushing mechanism is arranged above the fixed grading screen at the slag outlet; Alternatively, a single roller crushing mechanism is provided on the upper screen surface of the fixed grading screen, and the single roller crushing mechanism cooperates with the fixed grading screen. A double roller crushing mechanism or a single roller crushing mechanism is provided at the fixed grading screen, so that the steel slag can be further crushed before the steel slag is graded.

[0012] As an optional technical solution of the present invention, a crushing drum is arranged at the position of the crushing roller in the steel slag crushing bin, and at least one first row of teeth and at least one second row of teeth are arranged on the outer wall of the crushing drum along the circumferential direction, and the first row of teeth and the second row of teeth both include at least one crushing tooth, and the first row of teeth and the second row of teeth are alternately distributed along the circumference of the crushing drum, and each crushing tooth of the first row of teeth and each crushing tooth of the second row of teeth are mutually offset in the axial direction of the crushing drum. The first row of teeth and the second row of teeth are alternately distributed along the circumferential direction, and the crushing teeth of the first row of teeth and the crushing teeth of the second row of teeth are offset in the axial direction, which is convenient for fully crushing the steel slag and achieving a better scraping effect.

[0013] As an optional technical solution of the present invention, a traveling rail is arranged along the conveying channel outside the slag crushing bin, a traveling vehicle is arranged on the traveling rail, a traveling driving member is arranged on the traveling vehicle and drives the traveling vehicle to reciprocate along the traveling rail, the crushing roller is arranged on the traveling vehicle through a water-cooled bearing seat, and a water-cooling chamber is arranged in the crushing roller and / or the crushing barrel.

[0014] As an optional technical solution of the present invention, avoidance holes are provided on two opposite side walls of the slag crushing bin, walking rails are provided on two opposite sides of the slag crushing bin, and a traveling vehicle is provided on each walking rail, and both ends of the crushing roller extend out of the slag crushing bin and are respectively connected to the two traveling vehicles; Alternatively, a telescopic sealing structure is provided at the avoidance hole on the slag crushing bin, and the crushing roller is connected to the telescopic sealing structure and rotates relative to the telescopic sealing cover.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. A conveying channel is provided in the steel slag crushing bin, and crushing teeth are provided on the crushing roller corresponding to the crushing channel. The crushing roller is driven to rotate by the crushing driving member, and is driven to move back and forth along the conveying channel by the traveling driving member. The crushing teeth rotate with the crushing roller and move back and forth along the conveying channel, which can not only crush the steel slag in the conveying channel, but also play the effect of scraping the steel slag to the discharge port; 2. The slag grading bin is provided with a first grading outlet and a second grading outlet. Both the fixed grading screen and the vibrating grading screen are arranged obliquely above the first grading outlet, and both are located at the slag outlet. When the slag in the slag crushing bin enters the slag grading bin from the slag outlet, it first falls onto the fixed grading screen. While the fixed grading screen screens the slag, the slag on the fixed grading screen also moves toward the vibrating grading screen. This design can prevent the vibrating grading screen from being damaged by the impact of the slag for a long time. The fixed grading screen and the vibrating grading screen cooperate to grade the slag. The small-sized slag that meets the requirements is discharged from the first grading outlet, and the slag with larger particle size is discharged from the second grading outlet. 3. Both the slag crushing bin and the slag grading bin are provided with a first interlayer cavity, and the first interlayer cavity is provided with a water injection interface and an exhaust interface. During the crushing and grading process of the slag, the high-temperature slag heats the water in the first interlayer cavity into steam, which can not only realize the utilization of the residual heat of the slag, but also improve the cooling speed of the slag; the grading screen of the grading mechanism is provided with a fourth interlayer cavity, which can utilize the heat of the slag while grading and screening the slag, and accelerate the cooling speed of the slag; 4. A flue gas channel for discharging high-temperature flue gas is arranged in the steel slag crushing bin, a second interlayer cavity is arranged on the channel wall of the flue gas channel, the second interlayer cavity is communicated with the first interlayer cavity, a baffle is arranged in the flue gas channel to increase the moving distance of the flue gas, a third interlayer cavity is arranged inside the baffle, the third interlayer cavity is communicated with the first interlayer cavity or the second interlayer cavity, such a design can utilize the waste heat of the high-temperature flue gas and is conducive to reducing the temperature of the high-temperature flue gas when it is discharged; 5. The crushing roller is installed through a water-cooled bearing seat. A water-cooling chamber is set in the crushing roller and the crushing cylinder. By continuously introducing cooling water into the water-cooling chamber, the working parts of the crushing mechanism can be cooled. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 This is the structural diagram of the integrated crushing, grading and waste heat recovery machine; Figure 2This is the structural diagram of the slag crushing bin and crushing mechanism; Figure 3 It is the structural diagram of the slag classification bin and classification mechanism; Figure 4 It is a structural diagram of the crushing mechanism; In the figure: 1. slag crushing bin, 11. slag inlet, 12. slag outlet, 13. conveying channel, 14. smoke outlet, 15. smoke channel, 16. baffle, 2. slag grading bin, 21. first grading outlet, 22. second grading outlet, 3. crushing mechanism, 31. crushing roller, 32. crushing drive member, 33. travel drive member, 34. travel rail, 35. travel vehicle, 36. crushing cylinder, 37. telescopic sealing cover, 4. grading mechanism, 41. fixed grading screen, 42. vibrating grading screen, 43. vibrating drive member. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Example

[0019] like Figure 1-Figure 4 As shown, a high-temperature steel slag crushing, grading and waste heat recovery integrated machine includes a steel slag crushing bin 1, a steel slag grading bin 2, a crushing mechanism 3 and a grading mechanism 4. A slag inlet 11 is provided at the front end of the steel slag crushing bin 1, a slag outlet 12 is provided at the rear end of the steel slag crushing bin 1, and a conveying channel 13 is provided between the slag inlet 11 and the slag outlet 12 in the steel slag crushing bin 1. After the high-temperature steel slag is loaded into the steel slag crushing bin 1 from the slag inlet 11, it can be discharged from the slag outlet 12 along the conveying channel 13.

[0020] See also Figure 1 , Figure 2 and Figure 4 The silo wall of the slag crushing bin 1 is provided with an avoidance hole, which is a strip hole provided along the conveying channel 13. The crushing mechanism 3 includes a crushing roller 31, a crushing driving member 32 and a traveling driving member 33. The crushing roller 31 is provided through the avoidance hole, and crushing teeth are provided on the crushing roller 31 at a position corresponding to the conveying channel 13. The crushing driving member 32 is used to drive the crushing roller 31 to rotate, and the traveling driving member 33 is used to drive the crushing roller 31 to move back and forth along the conveying channel 13. The crushing teeth are driven to move back and forth along the conveying channel 13 while the crushing roller 31 rotates, which not only crushes the slag in the conveying channel 13, but also pushes the slag in the conveying channel 13 toward the slag outlet 12, thereby playing the role of crushing and pushing materials.

[0021] Specifically, the crushing roller 31 is provided with a crushing barrel 36 at a position in the slag crushing bin 1. The crushing barrel 36 is connected to the crushing roller 31 and rotates with the crushing roller 31. The outer wall of the crushing barrel 36 is provided with a first row of teeth and a second row of teeth. The first row of teeth includes at least one crushing tooth distributed along the axial direction of the crushing barrel 36. The second row of teeth includes at least one crushing tooth distributed along the axial direction of the crushing barrel 36. The first row of teeth and the second row of teeth are both one or more. The first row of teeth and the second row of teeth are alternately distributed in the circumferential direction of the crushing barrel 36. The crushing teeth of the first row of teeth and the crushing teeth of the second row of teeth are mutually staggered in the axial direction of the crushing barrel 36. Figure 1 and Figure 2 From the perspective shown, the crushing barrel 36 rotates counterclockwise, and the first row of teeth and the second row of teeth are used to crush the steel slag in the conveying channel 13, and the first row of teeth and the second row of teeth are used to pull the steel slag in the conveying channel 13 toward the slag outlet 12. Preferably, the first row of teeth and the second row of teeth each include at least two crushing teeth, and the crushing effect of the steel slag can be adjusted by reasonably arranging the spacing between the crushing teeth of the first row of teeth and / or the spacing between the crushing teeth of the second row of teeth.

[0022] A traveling rail 34 is provided outside the steel slag crushing bin 1, and the traveling rail 34 is provided along the conveying passage 13. A traveling vehicle 35 is provided outside the steel slag crushing bin 1, and the traveling vehicle 35 is provided on the traveling rail 34 and is provided with a traveling wheel that can cooperate with the traveling rail 34. The traveling driving member 33 drives the traveling wheel to rotate so as to drive the traveling vehicle 35 to reciprocate along the traveling rail 34. The traveling driving member 33 is a driving member in the form of a motor, a traveling motor, etc. A bearing seat structure suitable for mounting a crushing roller 31 is provided on the traveling vehicle 35, and the crushing roller 31 is mounted on the traveling vehicle 35 and rotates relative to the traveling vehicle 35. The rotating part of the crushing driving member 32 is transmission-connected with the crushing roller 31, and the crushing driving member 32 drives the crushing roller 31 to rotate. The crushing driving member 32 is a rotating driving member in the form of a motor, etc.

[0023] Furthermore, the crushing roller 31 is connected to the traveling vehicle 35 through a water-cooled bearing seat, and a water-cooling cavity is provided in the crushing roller 31 and / or the crushing cylinder 36. The water-cooling cavity is communicated with the water injection space of the water-cooled bearing seat, and cooling water is continuously injected into the water-cooled bearing seat and the water-cooling cavity, so that the crushing roller, the crushing cylinder and the water-cooled bearing seat can be cooled, so that the crushing mechanism 3 can be used for a long time in a high-temperature environment, and avoid deformation and damage due to the long-term high temperature in the slag crushing bin 1. The water-cooled bearing seat and the water-cooling cavity are also equipped with exhaust holes, and the water vapor formed by the vaporization of the cooling water can be discharged from the exhaust holes for power generation or passed into the air bag for storage.

[0024] Further, avoidance holes are provided on two opposite side walls of the slag crushing bin 1, and walking rails 34 are provided on two opposite sides of the slag crushing bin 1. Traveling vehicles 35 are provided on the two walking rails 34. Both ends of the crushing roller 31 extend from the two avoidance holes to the outside of the slag crushing bin 1, and are respectively connected to the two traveling vehicles 35. Both traveling vehicles 35 may be provided with a traveling driving member 33 or one of the traveling vehicles 35 may be provided with a traveling driving member 33.

[0025] See also Figure 4 The slag crushing bin 1 is provided with a telescopic sealing structure at the avoidance hole, and the telescopic sealing structure is used to block the avoidance hole. The telescopic sealing structure is a telescopic cover or other telescopic blocking structure. The crushing roller 31 is connected to the telescopic sealing structure and can rotate relative to the telescopic sealing cover 37. When the crushing roller 31 moves toward the slag inlet 11, the telescopic sealing structure between the crushing roller 31 and the slag inlet 11 is contracted and the part between the crushing roller 31 and the slag outlet 12 is extended. When the crushing roller 31 moves toward the slag outlet 12, the telescopic sealing structure between the crushing roller 31 and the slag inlet 11 is extended and the part between the crushing roller 31 and the slag outlet 12 is contracted, so that the avoidance hole is always in a blocked state.

[0026] See also Figure 1 and Figure 3 The slag grading bin 2 is arranged at the slag outlet 12, and the slag grading bin 2 is connected with the slag crushing bin 1 through the slag outlet 12. The slag leaves the slag crushing bin 1 from the slag outlet 12 and falls into the slag grading bin 2. At least two grading outlets are arranged at the bottom of the slag grading bin 2, and a grading mechanism 4 is arranged in the slag grading bin 2, and the grading mechanism 4 is used to distribute the slag to the designated grading outlets according to the particle size of the slag.

[0027] There are preferably two grading outlets, namely a first grading outlet 21 and a second grading outlet 22. The grading mechanism 4 includes a grading screen, which is tilted above the first grading outlet 21. The screen surface of the grading screen is tilted in the direction of the second grading outlet 22. The grading screen screens the slag, and the slag with small particle size falls into the first grading outlet 21 through the grading screen, and the slag with large particle size falls into the second grading outlet 22 along the grading screen. A stewing tank or a slag transfer device is provided at the first grading outlet 21, and a slag container or a slag reprocessing mechanism is provided at the second grading outlet 22.

[0028] As a preferred embodiment, the grading screen includes a fixed grading screen 41 and a vibrating grading screen 42. A vibrating mounting member is arranged above the first grading outlet 21. The vibrating mounting member is an elastic mounting structure for installing the vibrating screen. The vibrating grading screen 42 is obliquely arranged above the first grading outlet 21 through the vibrating mounting member, and the lower end of the vibrating grading screen 42 extends to the second grading outlet 22; a vibrating driving member 43 is arranged outside the slag grading bin 2. The vibrating driving member 43 can be a vibration motor or a vibration driving member formed by combining an ordinary driving motor and a vibration driver. A connecting rod is arranged at the vibration output portion of the vibrating driving member 43. A through hole is arranged on the bin wall of the slag grading bin 2. The connecting rod passes through the through hole and is connected to the vibrating grading screen 42 so that the vibrating driving member 43 can drive the vibrating grading screen 42 to vibrate.

[0029] The fixed grading screen 41 is also tilted, connected to the wall of the slag grading bin 2, and the lower end of the fixed grading screen 41 is above the vibrating grading screen 42. In the direction of the conveying channel 13, the fixed grading screen 41 is between the slag inlet 11 and the vibrating grading screen 42. After the slag in the slag crushing bin 1 falls into the slag grading bin 2 from the slag outlet 12, it directly falls onto the fixed grading screen 41, and then disperses onto the vibrating grading screen 42 along the screen surface of the fixed grading screen 41. The slag with small particle size falls from the screen holes of the fixed grading screen 41 or the vibrating grading screen 42 to the first grading outlet 21 below, and the slag with large particle size falls to the second grading outlet 22 along the screen surfaces of the fixed grading screen 41 and the vibrating grading screen 42. The fixed grading screen 41 is fixedly installed, and the steel slag falling into the steel slag grading bin 2 first falls onto the fixed grading screen 41, and then slides along the fixed grading screen 41 to the vibrating grading screen 42, which can prevent a large amount of steel slag from impacting the vibrating grading screen 42, thereby preventing the vibrating grading screen 42 from being damaged.

[0030] A double-roll crushing mechanism 3 may be provided above the fixed grading screen 41 at the slag outlet 12. The steel slag in the steel slag crushing bin 1 is first crushed by the double-roll crushing mechanism 3 before entering the steel slag grading bin 2, and then graded by the grading mechanism 4. A single-roll crushing mechanism 3 may also be provided on the upper screen surface of the fixed grading screen 41. The single-roll crushing mechanism 3 includes a crushing roller, which is driven to rotate by a rotary drive assembly. The crushing roller cooperates with the upper screen surface of the fixed grading screen 41 to crush the steel slag passing between the fixed grading screen 41 and the fixed grading screen 41. The fixed grading screen 41 may also be provided as an arc screen to improve the crushing effect of the cooperation with the single-roll crushing mechanism 3.

[0031] When there are more than two grading outlets, the number and form of the grading screens can be reasonably arranged according to the number of grading outlets. For example, when there are three grading outlets arranged side by side, the grading screen includes a first sieve plate, a second sieve plate and an inclined baffle plate, and the three grading outlets are respectively a first grading outlet 21, a second grading outlet 22 and a third grading outlet, the first sieve plate is inclinedly arranged above the first grading outlet 21 and the second grading outlet 22, and the lower end of the first sieve plate is at the third grading outlet; the second sieve plate is inclinedly arranged above the first grading outlet 21, the second sieve plate is below the first sieve plate, and the lower end of the second sieve plate is at the second grading outlet 22, the inclined baffle plate is inclinedly arranged between the first sieve plate and the second sieve plate, the high end of the inclined baffle plate is connected to the low end of the first sieve plate, and the low end of the inclined baffle plate is close to the high end of the second sieve plate. The steel slag entering the steel slag grading bin 2 first falls onto the first sieve plate, and the steel slag with large particle size falls to the third grading outlet along the inclined first sieve plate. The steel slag with smaller particle size passes through the sieve holes of the first sieve plate and falls onto the inclined baffle plate, and then falls onto the second sieve plate along the inclined baffle plate. Then, the steel slag is sorted by the second sieve plate and distributed to the first grading outlet 21 and the second grading outlet 22 respectively.

[0032] The temperature of the steel slag loaded into the steel slag crushing bin 1 from the slag inlet 11 is relatively high. In order to make full use of the waste heat of the steel slag, the bin wall of the steel slag crushing bin 1 and the bin wall of the steel slag grading bin 2 are both provided with a first interlayer cavity. The two first interlayer cavities can be provided independently or in communication. The first interlayer cavity is provided with a water injection interface and an exhaust interface. The water injection interface is used to connect a water-passing device or a water-passing pipeline to continuously inject water into the first interlayer cavity. The exhaust interface is used to connect an air bag or a steam pipeline to continuously output the steam of the first interlayer cavity. During the steel slag processing process, the high-temperature steel slag in the steel slag crushing bin 1 and the steel slag grading bin 2 heats the water in the first interlayer cavity into a gaseous state and outputs it from the exhaust interface, which not only utilizes the heat of the steel slag, but also accelerates the cooling speed of the steel slag.

[0033] Furthermore, a fourth interlayer cavity is provided in the grading screen of the grading mechanism 4, and the fourth interlayer cavity is communicated with the first interlayer cavity of the slag grading bin 2. The grading mechanism 4 can cool down the slag while grading and screening the slag. Specifically, the grading screen includes a fixed grading screen 41 and a vibrating grading screen 42, and a fourth interlayer cavity is provided inside the fixed grading screen 41 and the vibrating grading screen 42. The fixed grading screen 41 is connected to the inner wall of the slag grading bin 2, and the fourth interlayer cavity of the fixed grading screen 41 is directly communicated with the first interlayer cavity. A connecting pipe is provided on the vibrating grading screen 42, and the vibrating grading screen 42 is communicated with the fourth interlayer cavity through the connecting pipe. The connecting pipe is a deformable flexible pipe to adapt to the positional displacement of the vibrating grading screen 42 due to vibration.

[0034] In some embodiments, the fixed grading screen 41 and the vibrating grading screen 42 are in the form of a sieve plate with a plurality of sieve holes on the plate surface and a fourth interlayer cavity inside the plate surface. In other embodiments, the fixed grading screen 41 and the vibrating grading screen 42 include a plurality of pipes arranged side by side and connected in sequence, or include a plurality of pipes arranged alternately and connected, and the gaps between the pipes form sieve holes.

[0035] See also Figure 1 and Figure 2 The slag crushing bin 1 is also provided with a smoke outlet 14, and the high-temperature smoke in the slag crushing bin 1 and the slag classification bin 2 can be discharged from the smoke outlet 14. The slag crushing bin 1 is provided with a smoke channel 15, which is communicated with the smoke outlet 14. The channel wall of the smoke channel 15 is provided with a second interlayer cavity, which is communicated with the first interlayer cavity of the slag crushing bin 1. When the high-temperature smoke moves along the smoke channel 15, the high-temperature smoke heats the water in the second interlayer cavity into a gaseous state, thereby realizing cooling of the high-temperature smoke and utilizing the waste heat in the high-temperature smoke.

[0036] The smoke inlet of the smoke channel 15 is arranged at the slag outlet 12 and is located above the grading screen. The smoke inlet is arranged here not only to facilitate the discharge of high-temperature smoke from the slag crushing bin 1 and the slag grading bin 2, but also to facilitate the discharge of smoke dust generated during slag grading.

[0037] Furthermore, in order to improve the waste heat utilization effect of high-temperature flue gas and high-temperature smoke, at least one baffle 16 is provided in the flue gas channel 15, the baffle 16 is connected to the inner wall of the flue gas channel 15, and a third interlayer cavity is provided in the baffle 16, and the third interlayer cavity is communicated with the second interlayer cavity. In the case where the flue gas channel 15 is formed by the wall of the slag crushing bin 1, the third interlayer cavity of some baffles 16 can also be communicated with the first interlayer cavity of the slag crushing bin 1.

[0038] The baffles 16 are arranged in the smoke channel 15, so that the length of the smoke channel 15 can be extended under a certain space, so that the high-temperature smoke can travel a longer distance before being discharged from the smoke outlet 14, and contact the inner wall of the smoke channel 15 and the baffles 16 for a longer time, thereby effectively utilizing the waste heat of the high-temperature smoke. The baffles 16 are preferably multiple, and each baffle 16 is sequentially staggered along the smoke channel 15, so that the high-temperature smoke can continuously meander in the smoke channel 15.

[0039] Please refer again Figure 1-Figure 4When the high-temperature slag is fed into the slag crushing bin 1 from the slag inlet 11, the high-temperature slag is in a state of a mixture of molten and solid states. The high-temperature slag moves toward the slag outlet 12 along the conveying channel 13, and heats the water in the first interlayer cavity of the slag crushing bin 1 into a gaseous state. During the movement, the high-temperature slag gradually cools down and becomes solid. The crushing mechanism 3 moves back and forth, crushing the solid slag while continuously scraping the slag toward the slag outlet 12, so that the slag can be transported to the slag outlet 12 along the conveying channel 13. The conveying channel 13 can also be set in a form inclined toward the slag outlet 12. After the slag enters the slag classification bin 2 from the slag outlet 12, the classification mechanism 4 classifies and screens the slag. During the classification process, the slag heats the water in the first interlayer cavity of the slag classification bin 2 and the water in the fourth interlayer cavity of each component of the classification screen, so that the slag is further cooled down. By reasonably setting the length of the conveying channel 13 or the scraping speed of the crushing mechanism 3, the slag is at a temperature suitable for hot stewing after being classified. During the treatment of the slag in the slag crushing bin 1 and the slag grading bin 2, the high-temperature flue gas of the slag continuously meanders along the flue gas channel 15 and is discharged from the flue gas outlet 14. The high-temperature flue gas heats the water in the second interlayer chamber and the third interlayer chamber when moving in the flue gas channel 15, thereby utilizing the waste heat of the high-temperature flue gas.

[0040] During the process of slag crushing and grading, water is continuously passed through the first interlayer chamber, the second interlayer chamber, the third interlayer chamber and the fourth interlayer chamber. The heat of the slag and flue gas heats the water into steam and continuously outputs it, which not only speeds up the cooling of the slag and flue gas, but also makes full use of the heat of the slag and flue gas to reduce energy waste. The generated steam can also be used for power generation, storage and resale, etc., which can generate more profits.

[0041] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0042] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A high-temperature slag crushing, grading and waste heat recovery integrated machine, characterized in that: The invention comprises a slag crushing bin (1), a slag grading bin (2), a crushing mechanism (3) and a grading mechanism (4); the slag crushing bin (1) is provided with a slag inlet (11) and a slag outlet (12); a conveying passage (13) is provided between the slag inlet (11) and the slag outlet (12) in the slag crushing bin (1); an avoidance hole is provided on the side wall of the slag crushing bin (1) along the conveying passage (13); the crushing mechanism (3) comprises a crushing roller (31), a crushing driving member (32) and a traveling driving member (33); the crushing roller (31) is arranged through the avoidance hole; the crushing roller (31) is driven to rotate by the crushing driving member (32) and driven by the traveling driving member (33) to move along the conveying passage (13); The slag grading bin (2) is arranged at the slag grading bin (12), the slag grading bin (2) is connected to the slag crushing bin (1) and the slag grading bin (2) is provided with at least two grading outlets, the grading mechanism (4) is arranged in the slag grading bin (2) and outputs the slag from the designated grading outlets according to the particle size of the slag, the bin wall of the slag grading bin (2) and the bin wall of the slag crushing bin (1) are provided with a first interlayer cavity, and the first interlayer cavity is provided with a water injection interface and an exhaust interface.

2. The high-temperature slag crushing, grading and waste heat recovery integrated machine according to claim 1 is characterized in that: The slag crushing bin (1) is provided with a smoke outlet (14), a smoke channel (15) is provided inside the slag crushing bin (1), the smoke channel (15) is communicated with the smoke outlet (14), a channel wall of the smoke channel (15) is provided with a second interlayer cavity, and the second interlayer cavity is communicated with the first interlayer cavity.

3. The high-temperature slag crushing, grading and waste heat recovery integrated machine according to claim 2 is characterized in that: At least one baffle plate (16) is arranged in the smoke channel (15), a third interlayer cavity is arranged in the baffle plate (16), and the third interlayer cavity is communicated with the second interlayer cavity and / or the first interlayer cavity.

4. The high-temperature slag crushing, grading and waste heat recovery integrated machine according to claim 2 is characterized in that: The grading mechanism (4) comprises a grading screen, the grading screen is provided with a fourth interlayer cavity, the fourth interlayer cavity is communicated with the first interlayer cavity; the smoke inlet of the smoke channel (15) is arranged above the grading screen.

5. The high-temperature slag crushing, grading and waste heat recovery integrated machine according to claim 4 is characterized in that: The slag grading bin (2) is provided with two grading outlets, namely a first grading outlet (21) and a second grading outlet (22); a grading screen is provided above the first grading outlet (21), and the screen surface is inclined in the direction of the second grading outlet (22).

6. The high-temperature slag crushing, grading and waste heat recovery integrated machine according to claim 5, characterized in that: The grading screen comprises a fixed grading screen (41) and a vibrating grading screen (42). A vibrating mounting member is arranged above the first grading outlet (21). The vibrating grading screen (42) is arranged above the first grading outlet (21) through the vibrating mounting member and is driven to vibrate by a vibrating driving member (43) arranged outside the slag grading bin (2). The lower end of the vibrating grading screen (42) is at the second grading outlet (22). The fixed grading screen (41) is connected to the bin wall of the slag grading bin (2), and the lower end of the fixed grading screen (41) is above the vibrating grading screen (42).

7. The integrated machine for crushing, grading and recovering waste heat of high-temperature steel slag according to claim 6, characterized in that: A double-roll crushing mechanism (3) is arranged above the fixed grading screen (41) at the slag outlet (12); Alternatively, a single-roller crushing mechanism (3) is provided on the upper screen surface of the fixed grading screen (41), and the single-roller crushing mechanism (3) cooperates with the fixed grading screen (41).

8. The high-temperature slag crushing, grading and waste heat recovery integrated machine according to claim 6, characterized in that: The crushing roller (31) is provided with a crushing barrel (36) at a position inside the slag crushing bin (1); at least one first row of teeth and at least one second row of teeth are circumferentially arranged on the outer wall of the crushing barrel (36); both the first row of teeth and the second row of teeth include at least one crushing tooth; the first row of teeth and the second row of teeth are alternately distributed along the circumference of the crushing barrel (36); and each crushing tooth of the first row of teeth and each crushing tooth of the second row of teeth are mutually staggered in the axial direction of the crushing barrel (36).

9. The high-temperature slag crushing, grading and waste heat recovery integrated machine according to claim 6, characterized in that: A traveling rail (34) is arranged outside the slag crushing bin (1) along the conveying passage (13), a traveling vehicle (35) is arranged on the traveling rail (34), a traveling driving member (33) is arranged on the traveling vehicle (35) and drives the traveling vehicle (35) to reciprocate along the traveling rail (34), a crushing roller (31) is arranged on the traveling vehicle (35) via a water-cooled bearing seat, and a water-cooling chamber is arranged inside the crushing roller (31) and / or the crushing drum (36).

10. The high-temperature slag crushing, grading and waste heat recovery integrated machine according to claim 9, characterized in that: Avoidance holes are provided on two opposite side walls of the slag crushing bin (1), walking rails (34) are provided on two opposite sides of the slag crushing bin (1), and a traveling vehicle (35) is provided on each of the walking rails (34), and both ends of the crushing roller (31) extend out of the slag crushing bin (1) and are respectively connected to the two traveling vehicles (35); Alternatively, a telescopic sealing structure is provided at the avoidance hole on the slag crushing bin (1), and the crushing roller (31) is connected to the telescopic sealing structure and rotates relative to the telescopic sealing cover (37).

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