System and method for reducing powder rate and flash in cold-pressed pellets

Abstract

A system and method for reducing powder content and accelerating drying of cold-pressed pellets, belonging to the field of material pelletizing technology, includes an indoor working area, an outdoor working area, a material box support, a circulating material box, an adjustable-angle cylindrical focusing mirror, a specially modified transport vehicle, and a single-beam crane system outside the storage area. The system employs a multi-hole circulating material box, allowing moisture to evaporate from multiple angles, increasing the evaporation surface area and drying efficiency. It creates airflow conditions through the duct, accelerating the evaporation of moisture from the pellet surface. The temperature of the pellets is increased by focusing light through a cylindrical concave mirror, accelerating evaporation and creating a temperature and density difference between the inside and outside of the wall, further accelerating airflow. The combination of the airflow duct and high temperature significantly enhances the evaporation rate of the pellets. Through a unique concept and design, special equipment and mature tools are rationally combined, achieving a major innovation in the drying and logistics methods of cold-pressed pellets, realizing rapid drying, powder reduction, low-cost, and high-quality production.

Description

Technical Field

[0001] This invention belongs to the field of material briquetting technology, specifically relating to a system and method for reducing powder content and accelerating drying of cold-pressed briquettes. Background Technology

[0002] The double-roller briquetting process with ball sockets is a widely used cold-state material briquetting process, applicable to various industries. It is suitable for fine ore, sintered return ore, iron-containing solid waste, various types of sludge, waste containing other valuable substances, pulverized coal, coke powder, etc. After briquetting, the briquettes can be fed into converters, blast furnaces, reduction shaft furnaces, rotary hearth furnaces, rotary kilns, and belt roasters for further processing. Briquetting requires low investment, yields quick results, is highly efficient, and has strong adaptability to materials. However, currently, most enterprises lack sophisticated processes for drying, storing, and reducing breakage of the briquettes, resulting in the following shortcomings:

[0003] 1. A method involves using an upward-lifting conveyor belt to discharge pellets into small piles, then moving the belt belt down a slope from one side of the pile until a ridge is formed. If space constraints prevent this, a loader is used to shovel the pellets to the finished product warehouse for large-scale stacking. This method uses a gentle slope for discharge when the new pellets are not yet strong, reducing breakage. After accumulating a certain amount, the pellets are shoveled away, allowing for a period of strengthening in place, which also lays the foundation for reducing breakage during subsequent shoveling. This method is a significant improvement over the extensive and frequent shoveling process and represents a technological innovation for companies that understand pelletizing technology. However, it still involves piling, loading, and unloading to the warehouse, which presents serious collision problems.

[0004] 2. Some companies use multiple short conveyor belts to transport newly pressed briquettes directly to the finished product warehouse for large-scale stockpiling. When space permits, they stack the briquettes in a 1 / 4-circle pattern from the outside in (multiple 1 / 4-circles nested within each other, forming a 1 / 4-cake shape when viewed from above; the rings represent ridges, and the spaces between the rings represent valleys, facilitating ventilation), creating a stockpile with a valley in the middle to maximize ventilation. This approach represents a further innovation, but it is limited to control within the briquetting production line; breakage during loading is still unavoidable.

[0005] 3. Some companies face space constraints when building briquetting production lines. New briquettes, forming small mounds, are immediately shoveled to the finished product warehouse for continued drying at room temperature, or scooped up with oil shovels and transported to large heaps for drying. This method has two drawbacks: first, it doesn't allow sufficient time for the briquettes to harden before hastily turning them over; second, the heaps are too high and lack ventilation, making it the most unscientific method of briquetting and storage. While this is manageable in summer, in winter the briquettes are difficult to dry, and the large heaps result in slow drying, causing various problems for users, such as significant temperature drops, hydrogen buildup in the molten steel, and potential explosions.

[0006] 4. Some companies employ processes that utilize flue gas or electric heating to dry the pellets, hardening them before they land or are loaded onto trucks to increase their strength and enhance their resistance to impacts and collisions. This improves their resistance to breakage during subsequent tipping. However, this method is costly and only suitable for high-value materials or production lines with ample capital. This approach focuses on pre-emptive reinforcement without addressing the issue of reducing the tipping process. While the amount of powder generated by impacts and friction during the subsequent tipping is reduced compared to the wet-pile tipping method, it is still significant.

[0007] Insufficient aging and hardening time for the pellets, coupled with repeated handling, turning over, and bumping during pelleting, increases powder production. This not only inconveniences users but also results in deductions from the pelletizing company's pay, impacting profitability. Taking measures to remove powder and re-pelletize further increases costs. Additionally, it generates significant dust, which is detrimental to the health of workers.

[0008] Excessive powder content or insufficient drying hinders users from effectively utilizing and maximizing the value of the material. This is mainly due to:

[0009] 1. The dust removal system removes a large amount of powder, reducing the actual amount fed into the furnace, which also increases the load on the dust removal system and causes equipment failure.

[0010] 2. While electric arc furnaces (electric arc resistance furnaces) excel at processing powdered materials, large quantities of powder can easily sinter, leading to poor charge permeability. This hinders the removal of CO generated after carbon reduction of oxides in minerals, slowing the reduction reaction rate according to Richardley's principle, reducing furnace yield, and increasing costs. Furthermore, the sintered charge layer has high conductivity, making it difficult to insert electrodes deeply, resulting in low energy efficiency, which also affects yield and quality. Increased power consumption and issues such as charge collapse and sparking can occur, posing risks to equipment and personnel safety. If the pellets are not dry, moisture will absorb heat, resulting in waste.

[0011] 3. In vertical shaft furnaces using briquetting, increased powder leads to decreased permeability, affecting in-furnace reactions and causing deterioration of furnace conditions and performance indicators. For rotary kilns, excessive powder easily forms rings, hindering productivity and operating rates. High moisture content also carries away heat and causes refractory materials to easily pulverize, reducing furnace lifespan, increasing maintenance costs, and lowering operating rates.

[0012] 4. For converters, electric furnaces, induction furnaces, etc., the large amount of pellets and powders generates significant dust, resulting in poor on-site operating conditions. Using wet pellets can cause hydrogen enrichment in the metal, leading to quality deterioration and high material usage risks. Adding wet alloys to molten steel ladles or non-ferrous metal ladles can easily cause a sudden steam explosion, which is detrimental to personnel and equipment safety.

[0013] Traditional briquetting companies typically lack specialized drying facilities, relying instead on natural drying in stockpiles (wind and sun), with the first batch dried and transported out. Because the permeability of the briquettes decreases after stacking, drying takes a long time, requiring a large buffer yard for the briquetting company, thus increasing investment. While adding drying equipment can speed up drying and output, it also increases costs. Adding screening and dust removal equipment can reduce powder production and avoid penalties to some extent, but the increased investment and operating costs make it uneconomical.

[0014] An investigation into the domestic situation revealed that there is currently no systematic, low-cost process that can simultaneously achieve both drying and powder reduction. Therefore, it is necessary to develop a systematic process for rapidly drying pellets and reducing pulverized material, starting from the stage from pellet output to use, by combining a series of equipment and operating methods. Summary of the Invention

[0015] The purpose of this invention is to provide a system and method for reducing powder content and accelerating drying of cold-pressed pellets. The system for reducing powder content and accelerating drying of cold-pressed pellets includes the following components: an indoor working area, an outdoor working area, a material box support, a circulating material box, an adjustable-angle cylindrical focusing lens, a specially modified transport vehicle, and a single-beam crane system outside the storage area.

[0016] 1. Indoor work area

[0017] The indoor work area is a steel structure workshop, including two briquetting production lines (one dry and one wet), located in two separate bays. Their function is to produce cold-pressed briquettes, pack them, and ship them to the outdoor work area, while also serving as a temporary storage area for briquettes and empty boxes during rainy weather. The dry briquetting production line includes a dry briquetting equipment area, a No. 1 raw material pool, a No. 1 circulating material bin storage area (empty and / or full boxes), a No. 1 raw material overhead crane, a No. 1 output track, and a No. 1 track electric flatcar. The wet briquetting production line includes a wet briquetting equipment area, a No. 2 raw material pool, a No. 2 circulating material bin storage area (empty and / or full boxes), a No. 2 raw material overhead crane, a No. 2 output track, and a No. 2 track electric flatcar. The steel structure workshop has steel pipe or I-beam columns, with rail beams welded to the top of the columns for the overhead crane installation.

[0018] 2. Outdoor work area

[0019] The outdoor work area is adjacent to and orthogonal to the indoor work area. Its function is to serve as a finished product warehouse, a rapid drying area for pellets, a loading area, and a temporary storage area for empty boxes during sunny weather. The outdoor work area includes track support beams and columns, a finished product trolley, a reinforced concrete wall reinforced with triangular reinforced concrete columns, a V-shaped air-gathering wing wall, and a material box support.

[0020] 3. Circulating material bin

[0021] The circulating material bin consists of a bottom slide made of thick-walled channel steel, multiple uprights made of steel pipe, an upper longitudinal beam made of channel steel, a bottom crossbeam made of steel plate, an upper crossbeam made of square tube, a guide groove made of small channel steel, and reinforcing angle plates (all right-angle parts are equipped with these; for clarity and simplicity, [the following is omitted]). Figure 2 The structure consists of three parts: a front sliding gate (made of perforated steel plate and small angle steel welded together, with round holes forming hanging protrusions on its protruding parts), a lifting plate, a 3-5mm thick material box enclosure, and a sliding plate lifting rope (steel wire rope and rope buckle). Its function is to serve as a ventilated storage and transportation box for the ball material, reducing the number of times the ball material is turned over and reducing the amount of crushed material while promoting rapid drying of the ball material. All the above parts are welded and made of Q355 or higher quality material. The bottom of the column is welded to the bottom slide, the upper longitudinal beam is welded to the top of the column, the bottom crossbeam is welded to the bottom slide to connect and fix the two bottom slides, the guide groove is welded to the inner side of the frontmost column, the lifting plate is welded to the upper longitudinal beam, and the material box enclosure is welded to the inner side of the column (there are a total of 5 material box enclosures, which are respectively set on the top, bottom, left, right and back of the circulating material box, and the front of the circulating material box is the sliding gate).

[0022] 4. Material bin support

[0023] The sliding material box support consists of a longitudinal base made of billet, a solid steel column, a crossbeam made of square tube, a roller groove made of thick-walled channel steel, a horizontal base made of billet, a reinforcing component made of small square tube, a roller made of wear-resistant steel (set on the roller shaft), a rolling bearing, a pin seat and a pin. Its functions are: a support for drying or temporarily storing full or empty boxes in the circulating material box, and a sliding quick loading device during loading. The above components are primarily welded frames, made of Q355 or higher strength material. The rollers and roller shafts are made of Mn13Cr2 wear-resistant steel. The lower ends of the solid steel columns are welded to the longitudinal bases, and the upper ends are welded to thick roller grooves. Crossbeams are welded to the inner side of the upper ends of the solid steel columns. One crossbeam is installed every four solid steel columns to ensure structural rigidity; a transverse base is installed every two solid steel columns to further ensure structural rigidity. Reinforcing members are welded inside the roller grooves, located in the gaps between the rollers, to strengthen the roller grooves and prevent deformation. The rollers are fastened to the roller shafts with keys for easy disassembly and assembly. The roller shafts are mounted on the roller grooves via rolling bearings. A pin seat is located on the outer side of the upper end of the solid steel column. The pin is inserted into the pin seat to prevent the circulating material box from moving forward. After the pin is removed, the circulating material box can move forward and slide into the transport vehicle. For easy loading, the material box support has a 10% slope.

[0024] 5. Adjustable elevation cylindrical condenser lens

[0025] The adjustable-angle cylindrical condenser consists of a box-type column welded from thick steel plates, a box-type power platform welded from thick steel plates, a motor, a reducer, a main shaft, a cylindrical space frame welded from angle steel, a rectangular thin steel plate reflective surface covered with aluminum foil, a column mounting pit, and a ground steel plate. Its function is to concentrate sunlight onto the material box after ventilation and drying, and further accelerate the drying of the pellets through high temperature. At the same time, it works with the surrounding wall to act as an air duct. The above components are made of Q355 or higher strength material. The installation arrangement is as follows: a box-type power platform, welded from box-type columns and thick steel plates, is directly cast into the reinforced concrete cage-type column installation pit. After extending above ground, it is firmly welded to the ground-laying steel plate through a through-type welding method and reinforced by triangular ribs welded to the box-type columns and ground-laying steel plate. The motor and reducer are bolted to the box-type power platform welded from thick steel plates. The reducer's output shaft is connected to the main shaft via a coupling to output power. Isosceles trapezoidal members are welded to both ends of the main shaft near their ends, and columnar space frames are welded onto these isosceles trapezoidal members. Rectangular thin steel plates with aluminum foil reflective surfaces are bolted to the columnar space frames. The device's elevation angle can be adjusted when the motor rotates forward and backward to focus sunlight onto the outdoor material box as much as possible.

[0026] 6. Specially modified transport vehicles

[0027] The transport vehicle is a general deep-box vehicle for transporting granular materials. Two modifications are needed: First, weld roller grooves with the same structure and width as the material box support to the inside of the compartment near the side panel to facilitate smooth connection of the circulating material box sliding from the material box support; second, reinforce the inner side of the rear of the compartment with steel plates of 20mm or more, and open holes at the rear of the compartment to insert horizontal stoppers, and open holes at the rear of the bottom of the compartment to insert vertical stoppers (large-head pins).

[0028] 7. Electric single-girder crane system outside the basement

[0029] A gantry frame consisting of vertical I-beams and horizontal rails is installed outside the storage area. The rails are welded or bolted to the I-beam columns and reinforced with triangular stiffeners. A single-beam crane is then installed on the horizontal structure.

[0030] A method for reducing powder content and accelerating drying of cold-pressed pellets includes the following steps:

[0031] (1) Operation Mode 1

[0032] ① The circulating material bins are hoisted from inside and outside the factory building onto the track-mounted electric flatcar. A material bin is also placed on one side of the end of the track. The briquetting material from the briquetting production line is output to the circulating material bins via a horizontal conveyor belt and an upward conveyor belt at the end.

[0033] ② After the circulating material box is full, first move the lifting belt conveyor to load the material box on one side of the track, and then start the track electric flat car to transport the circulating material box to the outdoor work area.

[0034] ③ After the track-mounted electric flatcar reaches the outdoor work area and the overhead crane's operating range, it stops. The outdoor finished product overhead crane then lifts the circulating material box and places it on the box support. For dry briquetting, the finished product overhead crane directly lifts the circulating material box and loads it onto the car.

[0035] ④ After the ball material is placed on the material box support, it dries rapidly under the high-speed airflow of the air passage formed by the figure-eight open-shaped wind-gathering wing wall, the reinforced concrete wall reinforced with corner reinforced concrete columns, the adjustable-angle cylindrical condenser, and the factory wall, as well as the high temperature formed by the condenser concentrating sunlight.

[0036] ⑤ The dried pellets are loaded into the circulating hopper according to the first-in, first-out (outdoor work area) principle. There are two loading methods:

[0037] A. Thread two thick steel wire ropes with loops at both ends through the lifting holes on the circulating material box. Then, use an overhead crane to lower the circulating material box into a specially modified transport vehicle (the inner side of the truck bed is welded with roller grooves and rollers similar to those on the material box bracket; the rear of the truck bed has horizontal stops made of 20-50mm thick alloy steel square bars that pass through the rear of the truck bed, and vertical stops inserted into the rear of the truck floor to block the circulating material box during unloading; after each time the circulating material box is lowered, the insertion of the horizontal and vertical stops must be checked). Two circulating material boxes are lowered into each truck, then the rear stops are inserted, and the rear truck bed is closed.

[0038] B. Align the rear of the specially modified transport vehicle with the material box support, ensuring that the roller grooves on both the vehicle and the support are straight and close to the ends of the roller grooves on the vehicle. Remove the pin from the safety device at one end of the material box support, and gently push it from behind using the forklift forks to allow the circulating material box to slide into the specially modified transport vehicle's cargo compartment. Place two material boxes in each vehicle, then insert the rear stop and close the rear cargo compartment.

[0039] ⑥ The vehicle transports the above circulating material boxes to the outside of the user's underground warehouse. The small crane (electric hoist) on the gantry pulls out the pull-out gate at the rear of the material box. The vehicle reverses so that the rear wheels touch the threshold outside the warehouse grid. Then the rear panel is opened, and the vehicle's hydraulic system is activated to tilt the truck bed and dump the ball material in the material box into the underground warehouse.

[0040] ⑦ After unloading, the carriage is returned to its original position, the rear panel is fastened, and the gantry crane puts the material box insertion gate back in.

[0041] ⑧ The specially modified transport vehicles return to the outdoor working area of ​​the briquetting plant. The outdoor overhead crane places the empty circulating material box on the material box support or directly onto the electric flat car and drives into the plant to collect the briquetting material.

[0042] (2) Operation Mode 2

[0043] ① After the briquetting machine's outlet, multiple short belt conveyors with pulleys extend to the outdoor work area. The briquetting material is output via an upward-lifting belt to a circulating hopper pre-placed on a hopper support. When one hopper is full, the upward-lifting belt is adjusted to output material to another adjacent hopper. This model is considered in case of electric flatcar malfunction, or during production line construction, eliminating the need for tracks and flatcars.

[0044] ② After the briquettes are placed on the material box support, they are rapidly dried under the high-velocity airflow formed by the air duct consisting of the V-shaped air-collecting wing wall, the reinforced concrete wall reinforced with corner reinforced concrete columns, the adjustable-angle cylindrical condenser lens, and the factory walls, as well as the high temperature generated by the condenser lens concentrating sunlight. Dry briquetting does not require this drying process.

[0045] ③ Load the dried briquetting hopper (or a dry briquetting hopper already filled with briquettes) onto the truck according to the first-in, first-out principle (for outdoor work areas) (this principle does not apply to dry briquetting, but briquettes briquetized that day must be delivered on the same day to prevent pulverization due to aging). There are two loading methods:

[0046] A. Thread two thick steel wire ropes with loops at both ends through the lifting holes on the circulating material box. Then, use an overhead crane to lower the circulating material box into a specially modified transport vehicle (the inner side of the truck bed is welded with roller grooves and rollers similar to those on the material box bracket; the rear of the truck bed has horizontal stops made of 20-50mm thick alloy steel square bars that pass through the rear of the truck bed, and vertical stops inserted into the rear of the truck floor to block the circulating material box during unloading; after each time the circulating material box is lowered, the insertion of the horizontal and vertical stops must be checked). Two circulating material boxes are lowered into each truck, then the rear stops are inserted, and the rear truck bed is closed.

[0047] B. Align the rear of the specially modified transport vehicle with the material box support, ensuring that the roller grooves on both the vehicle and the support are straight and close to the ends of the roller grooves on the vehicle. Remove the pin from the safety device at one end of the material box support, and gently push it from behind using the forklift forks to allow the circulating material box to slide into the specially modified transport vehicle's cargo compartment. Place two material boxes in each vehicle, then insert the rear stop and close the rear cargo compartment.

[0048] ④ The vehicle transports the above circulating material boxes to the outside of the user's underground warehouse. The small crane (electric hoist) on the gantry pulls out the pull-out gate at the rear of the material box. The vehicle reverses so that the rear wheels touch the threshold outside the underground warehouse grid. Then the rear panel is opened, and the vehicle's hydraulic system is started to tilt the truck bed, dumping the ball material in the material box into the underground warehouse.

[0049] ⑤ After unloading, the carriage is returned to its original position, the rear panel is fastened, and the gantry crane puts the material box insertion and removal gate back in.

[0050] ⑥ The specially modified transport vehicles return to the outdoor working area of ​​the briquetting plant. The outdoor overhead crane places the empty circulating material box on the material box support or directly onto the electric flat car and drives into the plant to collect the briquetting material.

[0051] By circulating the material bins in this way, rapid drying can be achieved while reducing tipping and breakage of the granules.

[0052] Features of the present invention

[0053] 1. The system of the present invention includes: an indoor working area, an outdoor working area, a material box support, a circulating material box, an adjustable cylindrical condenser lens, a specially modified transport vehicle, and a transportation method for drying and reducing crushing of the pellets.

[0054] 2. Indoor operating area: Includes two briquetting production lines (one dry and one wet). The dry briquetting production line includes a dry briquetting equipment area, raw material pool, circulating material bin placement area (empty or full), raw material overhead crane, output track, and track-mounted electric flatcar. The wet briquetting production line has the same layout and basic components as the dry briquetting production line, only the briquetting equipment is different.

[0055] 3. Outdoor working area: Adjacent to and orthogonal to the indoor working area, it can serve as a finished product warehouse, a rapid drying area for pellets, a loading area, and a temporary storage area for empty boxes in good weather. The outdoor working area includes track support beams and columns, finished product trolleys, reinforced perimeter walls, V-shaped air-collecting wing walls, and material box supports.

[0056] 4. Circulating material bin

[0057] The system comprises a bottom chute made of thick-walled channel steel, multiple columns made of steel pipe, an upper longitudinal beam made of channel steel, a bottom crossbeam made of steel plate, an upper crossbeam made of square tube, a guide chute made of small channel steel, reinforcing angle plates, a front insertion gate, a lifting hole plate, a material box enclosure made of machined scraps, and a lifting rope (steel wire rope and rope buckle). Its function is to serve as a ventilated storage and transport box for the pellets, reducing the number of times the pellets are turned over and minimizing crushed material while promoting rapid drying. All parts are welded from Q355 or higher strength material. The columns are welded above the bottom chute, the upper longitudinal beams are welded to the top of the columns, the bottom crossbeams are welded to the bottom chute, the guide chute is welded to the inside of the foremost column, the lifting hole plate is welded to the upper longitudinal beam, and the material box enclosure is welded to the inside of the columns.

[0058] 5. Material bin support

[0059] The sliding material box support consists of a billet longitudinal base, solid steel columns, square tube crossbeams, thick-walled channel steel roller grooves, a billet transverse base, rollers made of wear-resistant steel plate reinforced with small square tubes, rolling bearings, pin seats, and pins. It serves as a support for drying or temporarily storing circulating material boxes and as a sliding quick-loading device. All components are welded from Q355 or higher strength material, and the rollers and shafts are made of Mn13Cr2 steel for wear resistance. One crossbeam is installed for every four columns, and one transverse base is installed for every two columns to ensure structural rigidity. Reinforcing members are welded into the gaps between the rollers inside the roller grooves to strengthen the grooves and prevent deformation. The material box support has a 10% slope for easy loading.

[0060] 6. Adjustable elevation cylindrical condenser

[0061] The system comprises box-type columns welded from thick steel plates, a box-type power platform welded from thick steel plates, a motor, reducer, main shaft, a column-shaped space frame welded from angle steel, a rectangular thin steel plate reflective surface covered with aluminum foil, a column installation pit, and a ground steel plate. It concentrates sunlight to accelerate the drying of the spherical material, working in conjunction with the surrounding wall to function as a ventilation duct. All components are made of Q355 or higher strength material. The columns and power platform are directly cast into a reinforced concrete cage foundation, extending above the ground and welded securely to the ground steel plate through a through-welding method, further reinforced by triangular ribs welded to the columns and ground steel plate. The device's elevation angle can be adjusted to align with the sun and concentrate sunlight onto the outdoor spherical material box during forward and reverse rotation.

[0062] 7. Specially modified transport vehicles

[0063] First, a roller groove with the same structure and width as the material box support is welded inside the compartment near the side panel to facilitate smooth connection of the circulating material box that slides from the support. Second, the inner side of the compartment is reinforced with a steel plate of more than 20mm at the rear of the compartment. At the same time, a hole is opened at the rear of the compartment to insert a horizontal stop and a hole is opened at the rear of the bottom of the compartment to insert a vertical stop.

[0064] 8. Electric single-girder crane system outside the basement

[0065] A gantry frame consisting of vertical I-beams and horizontal rails is installed about 0.5 meters outside the underground warehouse. The horizontal beams made of rails are welded or bolted to the I-beam columns and reinforced with triangular stiffeners.

[0066] 9. Rapid drying and low-breakage material transfer method for pellets

[0067] (1) Dry balls can be supplied with less breakage, while wet balls can be dried quickly and supplied with less breakage.

[0068] (2) There are two different transshipment methods.

[0069] The beneficial effects of this invention are:

[0070] 1. After the pellets are pressed, they are directly loaded into the ventilated circulating material box, which provides sufficient time for aging and hardening, and avoids collisions and frictions caused by the pellets falling on the ground and subsequent shoveling, dumping, loading and other processes, thus minimizing the amount of crushing.

[0071] 2. A porous circulating feeder is used to evaporate moisture from multiple angles, increasing the evaporation surface area and drying efficiency. The strength and rigidity of the porous scrap material plate are superior to those of ordinary steel wire mesh.

[0072] 3. Create airflow conditions that accelerate airflow, allowing moisture on the surface of the ball material to evaporate quickly.

[0073] 4. The temperature of the pellets is increased by focusing light through a concave mirror on the cylindrical surface, accelerating evaporation. In addition, the temperature and density difference between the air inside and outside the wall further accelerates airflow due to its suction effect. The combination of the air duct and the high temperature significantly enhances the evaporation rate of the pellets' moisture.

[0074] 5. Two operating modes were designed: one is to use an electric flatbed cart to transport balls out of the factory, and the other is to use a short belt conveyor to transport balls out of the factory to the material box on the support. This method is highly efficient in ball output, highly adaptable, and further reduces the impact and crushing of balls.

[0075] 6. It adopts a unique combination of indoor and outdoor work areas and both dry and wet briquetting production lines. The division of labor in each area is clear, and the operations can be carried out in parallel without conflict. The production line has high efficiency, can adapt to a variety of materials, and can make full use of sunny weather while adapting to both cloudy and sunny weather.

[0076] 7. Adhering to the principles of minimizing tipping, frictionless handling, and prioritizing strength before transportation, the combination of various innovative and mature equipment has enabled the rapid drying of cold-pressed pellets with minimal powder production.

[0077] Overall, with its unique concept and design, the system rationally combines specialized and mature equipment and tools, achieving a major innovation in cold-pressed pellet drying and logistics methods. This enables rapid drying, powder reduction, low-cost, and high-quality production of pellets, which is conducive to achieving a win-win situation for supply and demand, the healthy development of the cold-bonded pellet industry, and energy conservation and emission reduction in the industry. Attached Figure Description

[0078] Figure 1 A plan view (top) and a three-dimensional structure view (bottom) of the operating area (left is the outdoor operating area, right is the indoor operating area) of a system for reducing powder content and accelerating drying of cold-pressed pellets.

[0079] Figure 2 A circulating feed hopper for a system that reduces powder yield and accelerates drying of cold-pressed pellets;

[0080] Figure 3 A hopper support (partial unit of a long support) for a system that reduces powder content and accelerates drying of cold-pressed pellets;

[0081] Figure 4 An adjustable-angle cylindrical condenser lens for a system that reduces powder yield and speeds up drying of cold-pressed spherical materials, shown in plan view (top) and three-dimensional structure view (bottom);

[0082] Figure 5 A schematic diagram of a specially modified transport vehicle for a system that reduces powder content and accelerates drying of cold-pressed pellets;

[0083] Figure 6 A schematic diagram of a gantry crane removing a slide gate valve for a system that reduces powder content and accelerates drying of cold-pressed pellets;

[0084] In the diagram, 1-1 is the dry briquetting equipment area, 1-2 is the raw material pool I, 1-3 is the circulating material box placement area I, 1-4 is the raw material overhead crane I, 1-5 is the output track I, and 1-6 is the track electric flatcar I; 2-1 is the wet briquetting equipment area, 2-2 is the raw material pool II, 2-3 is the circulating material box placement area II, 2-4 is the raw material overhead crane II, 2-5 is the output track II, and 2-6 is the track electric flatcar II; 3-1 is the track support beam, 3-2 is the finished product overhead crane, 3-3 is the triangular reinforced concrete column reinforced reinforced concrete wall, 3-4 is the V-shaped air collection wing wall, 3-5 is the material box support; 5 is the circulating material box, 5-1 is the bottom slide, 5-2 is the column, 5-3 is the upper longitudinal beam, 5-4 is the bottom crossbeam, 5-5 is the upper crossbeam, 5-6 is the guide groove, 5-7 is the reinforcing corner plate, and 5-8 is the front insertion gate. 5-8-1 Perforated steel plate; 5-8-2 Small angle steel; 5-8-3 Hanging protrusion; 5-9 Hanging perforated plate; 5-10 Material box enclosure; 5-11 Insert plate and lifting rope; 6-1 Longitudinal base; 6-2 Solid steel column; 6-3 Crossbeam; 6-4 Roller groove; 6-5 Horizontal base; 6-6 Reinforcing member; 6-7 Roller; 6-8 Rolling bearing; 6-9 Pin seat; 6-10 Pin; 7-1 Box-type column. 7-2 Box-type power platform, 7-3 Motor, 7-4 Reducer, 7-5 Main shaft, 7-6 Columnar space frame, 7-7 Rectangular thin steel plate reflective surface, 7-8 Column mounting pit, 7-9 Ground steel plate; 8-1 Carriage bottom, 8-2 Carriage panel, 8-3 Horizontal stop, 8-4 Vertical stop; 9-1-1 I-beam column, 9-1-2 Horizontal beam, 9-1-3 Triangular stiffening plate, 9-2 Single girder crane. Detailed Implementation

[0085] A system for reducing powder yield and accelerating drying of cold-pressed pellets, such as Figure 1-6 As shown, it includes the following components: indoor operating area, outdoor operating area, material bin support, circulating material bin, adjustable-angle cylindrical condenser lens, specially modified transport vehicle, and single-girder crane system outside the storage area; among which:

[0086] The indoor work area is a steel structure workshop, comprising two briquetting production lines, one for dry processing and one for wet processing, located in two separate bays. Its function is to produce cold-pressed briquettes, pack them for shipment to the outdoor work area, and serve as a temporary storage area for briquettes and empty boxes during rainy weather. The dry briquetting production line includes dry briquetting equipment area 1-1, raw material pool I 1-2, circulating material bin storage area I 1-3 (empty and / or full boxes), raw material overhead crane I 1-4, output track I 1-5, and electric flatcar I 1-6. The wet briquetting production line includes wet briquetting equipment area 2-1, raw material pool II 2-2, circulating material bin storage area II (empty and / or full boxes) 2-3, raw material overhead crane II 2-4, output track II 2-5, and electric flatcar II 2-6. The steel structure workshop has steel pipe or I-beam columns, with rail beams welded to the top of the columns for overhead crane installation.

[0087] The outdoor work area is adjacent to and orthogonal to the indoor work area. Its function is to serve as a finished product warehouse, a rapid drying area for pellets, a loading area, and a temporary storage area for empty boxes during sunny weather. The outdoor work area includes track support beams 3-1, a finished product crane 3-2, a triangular reinforced concrete column-reinforced reinforced concrete wall 3-3, a V-shaped air-gathering wing wall 3-4, and a material box support 3-5. The V-shaped air-gathering wing wall 3-4 has four sides, two on the left and two on the right. The left air-gathering wing wall 3-4 connects to the front and rear ends of the triangular reinforced concrete column-reinforced reinforced concrete wall 3-3, forming a 30° angle with it; the right air-gathering wing wall 3-4 connects to the front and rear ends of the left wall of the factory building (i.e., the wall adjacent to the track support beams 3-1), forming a 30° angle with it.

[0088] The circulating material box 5 consists of a bottom slide 5-1 made of thick-walled channel steel, multiple uprights 5-2 made of steel pipe, an upper longitudinal beam 5-3 made of channel steel, a bottom crossbeam 5-4 made of steel plate, an upper crossbeam 5-5 made of square tube, a guide groove 5-6 made of small channel steel, and reinforcing angle plates 5-7 (all right-angle parts are equipped with this; for simplicity...). Figure 2Only three are shown in the diagram: a front insert gate 5-8 (welded from perforated steel plate 5-8-1 and small angle steel 5-8-2, with a round hole forming a hanging protrusion 5-8-3), a hanging hole plate 5-9, a 3-5mm thick material box enclosure 5-10, and an insert plate lifting rope 5-11, which consists of a steel wire rope and a rope buckle. The function of the circulating material box 5 is to serve as a ventilated storage and transportation box for the ball material, reduce the number of times the ball material is turned over, reduce the amount of crushed material, and promote the rapid drying of the ball material. All the above parts are welded using Q355 or higher strength material. The bottom of the column 5-2 is welded to the bottom slide rail 5-1, the upper longitudinal beam 5-3 is welded to the top of the column 5-2, the bottom crossbeam 5-4 is welded to the bottom slide rail 5-1 to connect and fix the two bottom slide rails 5-1, the guide groove 5-6 is welded to the inside of the foremost column 5-2, the lifting plate 5-9 is welded to the upper longitudinal beam 5-3, and the material box enclosure plate 5-10 is welded to the inside of the column 5-2. There are a total of 5 material box enclosure plates 5-10, which are respectively set on the top, bottom, left, right and back of the circulating material box 5. The front of the circulating material box 5 is the pull-out gate plate 5-8. For simplicity, Figure 2 The holes and their distribution in the perforated steel plate 5-8-1 and the hopper enclosure 5-10 are shown in the figure to represent that the perforated steel plate 5-8-1 and the hopper enclosure 5-10 are designed to be perforated on the entire surface.

[0089] The material box support is specifically a sliding material box support, consisting of a longitudinal base 6-1 made of square billet, a solid steel column 6-2, a crossbeam 6-3 made of square tube, a roller groove 6-4 made of thick-walled channel steel, a horizontal base 6-5 made of square billet, a reinforcing member 6-6 made of small square tube, a roller 6-7 made of wear-resistant steel (set on the roller shaft), a rolling bearing 6-8, a pin seat 6-9, and a pin 6-10. Its functions are: a support for drying or temporarily storing full or empty material boxes in the circulating material box 5; and a sliding quick-loading device for loading onto vehicles. The above components form a welded frame, made of Q355 or higher strength material. The rollers and roller shafts are made of Mn13Cr2 wear-resistant steel. The lower end of the solid steel column 6-2 is welded to the longitudinal base 6-1, and the upper end of the solid steel column 6-2 is welded with a thick roller groove 6-4. The crossbeam 6-3 is welded to the inner side of the upper end of the solid steel column 6-2. One crossbeam 6-3 is installed every four solid steel columns 6-2 to ensure structural rigidity. A transverse base 6-5 is installed every two solid steel columns 6-2 (for simplicity...). Figure 3Only one is shown in the diagram, further ensuring structural rigidity; the reinforcing member 6-6 is welded inside the roller groove 6-4, located in the gap between the rollers, serving to strengthen the roller groove 6-4 and prevent deformation; the roller 6-7 is fastened to the roller shaft by a key for easy disassembly and assembly; the roller shaft is mounted on the roller groove 6-4 via a rolling bearing 6-8; the pin seat 6-9 is located on the outer side of the upper end of the solid steel column 6-2, and the pin 6-10 is inserted into the pin seat 6-9 to prevent the circulating material box 5 from moving forward. After the pin 6-10 is removed, the circulating material box 5 can move forward and slide into the transport vehicle. For easy loading, the material box support has a 10% slope.

[0090] The adjustable-angle cylindrical focusing mirror consists of a box-type column 7-1 welded from thick steel plates, a box-type power platform 7-2 welded from thick steel plates, a motor 7-3, a reducer 7-4, a main shaft 7-5, a cylindrical space frame 7-6 welded from angle steel, a rectangular thin steel plate reflective surface 7-7 with aluminum foil attached, a column mounting pit 7-8, and a floor steel plate 7-9. Its function is to concentrate sunlight onto the material box on the basis of ventilation and drying, and further accelerate the drying of the ball material through high temperature. At the same time, it works with the surrounding wall (the reinforced concrete wall 3-3 reinforced with angle steel columns and the factory wall adjacent to the track support beam 3-1) to play the role of an air duct. The above components are made of Q355 or higher strength material. The installation relationship is as follows: the box-type column 7-1 and the box-type power platform 7-2, welded from thick steel plates, are directly cast into the reinforced concrete cage-type column installation pit 7-8. After protruding from the ground, they are firmly welded to the ground-laying steel plate 7-9 through a through-type welding method and reinforced by triangular ribs welded to the box-type column 7-1 and the ground-laying steel plate 7-9; the motor 7-3 and the reducer 7-4 are bolted to the box-type power platform 7-2 welded from thick steel plates; the output shaft of the reducer 7-4 is connected to the main shaft 7-5 via a coupling to output power; isosceles trapezoidal members are welded to both ends of the main shaft 7-5 near the ends, and columnar space frames 7-6 are welded to the isosceles trapezoidal members; rectangular thin steel plate reflective surfaces 7-7 with aluminum foil are bolted to the columnar space frames 7-6. When the motor rotates forward and reverse, the elevation angle of the device can be adjusted to focus sunlight onto the outdoor material box as much as possible.

[0091] The specially modified transport vehicle is a general deep-box vehicle for transporting granular materials. Two modifications are made: First, a roller groove with the same structure and width as the material box support is welded inside the box near the side panel to facilitate smooth connection of the circulating material box sliding from the material box support; Second, the inner side of the rear of the box panel is reinforced with a steel plate of more than 20mm. At the same time, a through hole is opened at the rear of the box panel 8-2 to insert a horizontal stop 8-3, and a through hole is opened at the rear of the bottom of the box 8-1 to insert a vertical stop (large-head pin) 8-4.

[0092] The electric single-girder crane system outside the storage area specifically consists of a gantry frame composed of vertical I-beams and horizontal rails installed outside the storage area. A horizontal beam 9-1-2, made of rails, is welded or bolted to the I-beam column 9-1-1 and reinforced with triangular stiffeners 9-1-3. A single-girder crane 9-2 is then installed on the horizontal beam.

[0093] A method for reducing powder content and accelerating drying of cold-pressed pellets includes the following steps:

[0094] (1) Operation Mode 1

[0095] ① The overhead cranes inside and outside the factory hoist the circulating material bins onto the electric flatbed cars 1-6 and 2-6 on the tracks. A material bin is also placed on one side of the end of the track. The briquetting material from the briquetting production line is output to the circulating material bins via a horizontal belt and an upward belt at the end.

[0096] ② After the circulating material box 5 is full, first move the lifting belt conveyor to load the material box on one side of the track, and then start the track electric flat car 1-6 and 2-6 to transport the circulating material box 5 to the outdoor working area.

[0097] ③ After the track-mounted electric flatcars 1-6 and 2-6 have traveled to the outdoor work area and stopped within the crane's operating range, the outdoor finished product crane 3-2 lifts the circulating material box 5 and places it on the box support. For dry briquetting, the finished product crane 3-2 directly lifts the circulating material box 5 and loads it onto the car.

[0098] ④ After the ball material is placed on the material box support, it is quickly dried under the high-velocity airflow of the air passage formed by the open-shaped wind-gathering wing wall 3-4, the reinforced concrete wall 3-3 reinforced with corner reinforced concrete columns, the adjustable-angle cylindrical condenser, the factory wall adjacent to the track support beam 3-1, and the high temperature formed by the condenser concentrating sunlight.

[0099] ⑤ The dried pellets are loaded into the circulating hopper according to the first-in, first-out (outdoor work area) principle. There are two loading methods:

[0100] A. Pass two thick steel wire ropes with loops at both ends through the lifting holes 5-9 on the circulating material box. Then, use an overhead crane to lower the circulating material box into a specially modified transport vehicle. Roller grooves and rollers, similar to those on a material box bracket, are welded and installed on the inner side of the truck bed. At the rear of the truck bed, there are horizontal stops 8-3 made of 20-50mm thick alloy steel square bars that pass through the rear of the truck bed, and vertical stops 8-4 inserted into the rear of the truck floor to block the circulating material box during unloading. After each use, the insertion of the horizontal and vertical stops must be checked. Place two circulating material boxes in each truck, then insert the rear stops, and then close the rear truck bed.

[0101] B. Align the rear of the specially modified transport vehicle with the material box support, ensuring that the roller grooves 6-4 on both the vehicle and the material box support are straight and close to the ends of the roller grooves on the vehicle. Remove the pin 6-10 from the safety device (i.e., pin seat 6-9) at one end of the material box support. Gently push from behind with the forklift fork arm to allow the circulating material box to slide into the specially modified transport vehicle's cargo compartment. Place two material boxes in each vehicle, then insert the rear stop and close the rear cargo compartment.

[0102] ⑥ The vehicle transports the above-mentioned circulating material boxes to the outside of the user's underground warehouse. The small crane (electric hoist) on the gantry pulls out the pull-out gate 5-8 at the rear of the material box. The vehicle reverses so that the rear wheels touch the threshold outside the underground warehouse grid. Then the rear panel is opened, and the vehicle's hydraulic system is started to tilt the truck bed, dumping the ball material in the material box into the underground warehouse.

[0103] ⑦ After unloading, the carriage is returned to its original position, the rear panel is fastened, and the gantry crane puts the material box insertion gate back in.

[0104] ⑧ The specially modified transport vehicles return to the outdoor working area of ​​the briquetting plant. The outdoor overhead crane places the empty circulating material box on the material box support or directly onto the electric flat car and drives into the plant to collect the briquetting material.

[0105] (2) Operation Mode 2

[0106] ① After the briquetting machine's outlet, multiple short belt conveyors with pulleys extend to the outdoor work area. The briquetting material is output via an upward-lifting belt to a circulating hopper pre-placed on a hopper support. When one hopper is full, the upward-lifting belt is adjusted to output material to another adjacent hopper. This model is considered in case of electric flatcar malfunction, or during production line construction, eliminating the need for tracks and flatcars.

[0107] ② After the briquettes are placed on the material box support, they are rapidly dried under the high-velocity airflow formed by the air duct consisting of the V-shaped air-collecting wing wall 3-4, the reinforced concrete wall 3-3 reinforced with angled reinforced concrete columns, the adjustable-angle cylindrical condenser lens, and the factory wall adjacent to the track support beam 3-1, as well as the high temperature generated by the condenser lens concentrating sunlight. Dry briquetting does not require this drying process.

[0108] ③ Load the dried briquetting hopper (or a dry briquetting hopper already filled with briquettes) onto the truck according to the first-in, first-out principle (for outdoor work areas) (this principle does not apply to dry briquetting, but briquettes briquetized that day must be delivered on the same day to prevent pulverization due to aging). There are two loading methods:

[0109] A. Pass two thick steel wire ropes with loops at both ends through the lifting holes 5-9 on the circulating material box. Then, use an overhead crane to lower the circulating material box into a specially modified transport vehicle. Roller grooves and rollers, similar to those on a material box bracket, are welded and installed on the inner side of the truck bed. At the rear of the truck bed, there are horizontal stops 8-3 made of 20-50mm thick alloy steel square bars that pass through the rear of the truck bed, and vertical stops 8-4 inserted into the rear of the truck floor to block the circulating material box during unloading. After each use, the insertion of the horizontal and vertical stops must be checked. Place two circulating material boxes in each truck, then insert the rear stops, and then close the rear truck bed.

[0110] B. Align the rear of the specially modified transport vehicle with the material box support, ensuring that the roller grooves 6-4 on both the vehicle and the material box support are straight and close to the ends of the roller grooves on the vehicle. Remove the pin 6-10 from the safety device (i.e., pin seat 6-9) at one end of the material box support. Gently push from behind with the forklift fork arm to allow the circulating material box to slide into the specially modified transport vehicle's cargo compartment. Place two material boxes in each vehicle, then insert the rear stop and close the rear cargo compartment.

[0111] ④ The vehicle transports the above circulating material boxes to the outside of the user's underground warehouse. The small crane (electric hoist) on the gantry pulls out the pull-out gate 5-8 at the rear of the material box. The vehicle reverses so that the rear wheels touch the threshold outside the underground warehouse grid. Then the rear panel is opened, and the vehicle's hydraulic system is started to tilt the truck bed, dumping the ball material in the material box into the underground warehouse.

[0112] ⑤ After unloading, the carriage is returned to its original position, the rear panel is fastened, and the gantry crane puts the material box insertion and removal gate back in.

[0113] ⑥ The specially modified transport vehicles return to the outdoor working area of ​​the briquetting plant. The outdoor overhead crane places the empty circulating material box on the material box support or directly onto the electric flat car and drives into the plant to collect the briquetting material.

[0114] By circulating the material bins in this way, rapid drying can be achieved while reducing tipping and breakage of the granules.

Claims

1. A system for reducing powder content and accelerating drying of cold-pressed pellets, characterized in that, The system includes: an indoor work area, an outdoor work area, a material bin support (3-5), a circulating material bin, an adjustable-angle cylindrical condenser, specially modified transport vehicles, and a single-girder crane system outside the storage area. The indoor work area is a steel structure workshop, including one dry briquetting production line and one wet briquetting production line. The dry briquetting production line includes a dry briquetting equipment area (1-1), raw material pool I (1-2), circulating material bin I (1-3), raw material overhead crane I (1-4), output track I (1-5), and electric flatcar I (1-6). The wet briquetting production line includes a wet briquetting equipment area (2-1), raw material pool II (2-2), circulating material bin II (2-3), raw material overhead crane II (2-4), output track II (2-5), and electric flatcar II (2-6). The outdoor work area is adjacent to and orthogonal to the indoor work area. The outdoor work area includes track support beams (3-1), finished product cranes (3-2), triangular reinforced concrete column reinforced concrete enclosure (3-3), figure-eight open-shaped wind-gathering wing walls (3-4), and material box supports (3-5). The finished product cranes (3-2) lift the circulating material boxes (5) and place them on the material box supports (3-5) or directly lift the circulating material boxes (5) to load them onto the vehicle. The figure-eight open-shaped wind-gathering wing walls (3-4) have four sides, two on the left and two on the right. The left wind-gathering wing walls (3-4) are connected to the front and rear ends of the triangular reinforced concrete column reinforced concrete enclosure (3-3) and form a 30° angle with the triangular reinforced concrete column reinforced concrete enclosure (3-3). The right wind-gathering wing walls (3-4) are connected to the front and rear ends of the factory wall adjacent to the track support beams (3-1) and form a 30° angle with the left wall of the factory. The material box support (3-5) is a support for drying or temporarily storing full or empty boxes of the circulating material box (5), and is a sliding quick loading device for the circulating material box (5) when loading it onto a vehicle. The circulating material box (5) is composed of a bottom slide (5-1), a column (5-2), an upper longitudinal beam (5-3), a bottom crossbeam (5-4), an upper crossbeam (5-5), a guide groove (5-6), a reinforcing angle plate (5-7), a front pull-out gate (5-8), a lifting hole plate (5-9), a material box enclosure plate (5-10), and a lifting rope for the insert plate (5-11). The bottom of the column (5-2) is welded to the bottom slide (5-1), and the upper longitudinal beam (5-3) is welded to the top of the column (5-2). The crossbeam (5-4) is welded to the bottom slide (5-1) to connect and fix the two bottom slides (5-1). The guide groove (5-6) is welded to the inside of the front column (5-2). The lifting hole plate (5-9) is welded to the upper longitudinal beam (5-3). The material box enclosure plate (5-10) is welded to the inside of the column (5-2). There are a total of 5 material box enclosure plates (5-10), which are respectively set on the top, bottom, left, right and back sides of the circulating material box (5). The front of the circulating material box (5) is a pull-out gate plate (5-8). The adjustable-angle cylindrical condenser focuses sunlight onto the material box on the basis of ventilation and drying, and further accelerates the drying of the ball material through high temperature. At the same time, it works with the reinforced concrete wall (3-3) reinforced with angle reinforced concrete column and the factory wall of the adjacent track support beam (3-1) to play the role of air duct (8). The specially modified transport vehicle has roller grooves with the same structure and width as the material box support (3-5) welded to the side panel inside the compartment, so as to smoothly connect the circulating material box (5) that slides from the material box support (3-5) and transport the circulating material box (5) containing ball material to the outside of the warehouse. The single beam crane system outside the warehouse is used to pull out the pull-out gate (5-8) at the tail of the circulating material box (5). After the material is unloaded, the pull-out gate (5-8) is put back.

2. The system for reducing powder content and accelerating drying of cold-pressed pellets according to claim 1, characterized in that, The hopper support (3-5) consists of a longitudinal base (6-1), solid steel columns (6-2), crossbeams (6-3), roller grooves (6-4), a transverse base (6-5), reinforcing members (6-6), rollers (6-7), rolling bearings (6-8), pin seats (6-9), and pins (6-10). The lower end of the solid steel column (6-2) is welded to the longitudinal base (6-1), and the upper end of the solid steel column (6-2) is welded to the thick roller groove (6-4). The crossbeam (6-3) is welded to the inner side of the upper end of the solid steel column (6-2). One crossbeam (6-3) is set every four solid steel columns (6-2) to ensure structural rigidity. Every two solid steel columns (6-10)... 2) A horizontal base (6-5) is set to further ensure the structural rigidity; the reinforcing member (6-6) is welded inside the roller groove (6-4) and located in the gap between the rollers, which plays the role of reinforcing the roller groove (6-4) and preventing deformation; the roller (6-7) is fastened to the roller shaft by a key; the roller shaft is installed on the roller groove (6-4) by a rolling bearing (6-8); the pin seat (6-9) is set on the outer side of the upper end of the solid steel column (6-2), and the pin (6-10) is inserted into the pin seat (6-9) to prevent the circulating material box (5) from moving forward. After the pin (6-10) is pulled out, the circulating material box (5) moves forward and slides into the transport vehicle.

3. The system for reducing powder content and accelerating drying of cold-pressed pellets according to claim 1, characterized in that, The adjustable-angle cylindrical condenser lens consists of a box-type column (7-1), a box-type power platform (7-2), a motor (7-3), a reducer (7-4), a main shaft (7-5), a cylindrical space frame (7-6), a rectangular thin steel plate reflective surface (7-7), a column installation pit (7-8), and a ground steel plate (7-9). The box-type column (7-1) and the box-type power platform (7-2) are directly cast into the column installation pit (7-8), and after extending out of the ground, they are firmly welded to the ground steel plate (7-9) through a through-type weld and supported by triangular ribs. The structure is reinforced by welding to the box-type column (7-1) and the floor steel plate (7-9); the motor (7-3) and the reducer (7-4) are bolted to the box-type power platform (7-2); the output shaft of the reducer (7-4) is connected to the main shaft (7-5) through a coupling to output power; isosceles trapezoidal parts are welded to both ends of the main shaft (7-5) near the end, and columnar space frame (7-6) is welded on the isosceles trapezoidal parts; a rectangular thin steel plate reflective surface (7-7) with aluminum foil attached is bolted to the columnar space frame (7-6).

4. The system for reducing powder content and accelerating drying of cold-pressed pellets according to claim 2, characterized in that, The specially modified transport vehicle is converted from a general deep-box vehicle used for transporting granular materials. The inner side of the rear of the box is reinforced with steel plates of more than 20mm. At the same time, a hole is opened at the rear of the box (8-2) to insert a horizontal stop (8-3), and a hole is opened at the rear of the bottom of the box (8-1) to insert a vertical stop (8-4).

5. The system for reducing powder content and accelerating drying of cold-pressed pellets according to claim 1, characterized in that, The single-girder crane system outside the underground warehouse specifically consists of a gantry frame composed of vertical I-beams and horizontal rails set up outside the underground warehouse. The horizontal beams (9-1-2) made of rails are welded or bolted to the I-beam columns (9-1-1) and reinforced with triangular stiffeners (9-1-3). The single-girder crane (9-2) is installed on the horizontal beams.

6. The system for reducing powder content and accelerating drying of cold-pressed pellets according to claim 1, characterized in that, The front insert gate (5-8) is welded from a perforated steel plate (5-8-1) and a small angle steel (5-8-2), and its protruding part has a round hole to form a hanging protrusion (5-8-3); the insert plate hanging rope (5-11) is composed of a steel wire rope and a rope buckle.

7. The system for reducing powder content and accelerating drying of cold-pressed pellets according to claim 1, characterized in that, The hopper support (3-5) has a 10% slope.

8. A method for reducing powder content and accelerating drying of cold-pressed pellets, implemented using the system described in any one of claims 1-7, characterized in that, Includes the following steps: (1) Operation Mode 1 ① The overhead crane inside and outside the factory hoisted the circulating material box (5) to the No. I track electric flat car (1-6) and No. II track electric flat car (2-6). The material box was also placed on one side of the end of the track. The ball material of the ball pressing production line was output to the circulating material box (5) by the connection of the horizontal belt and the end lifting belt. ② After the circulating material box (5) is full, first move the lifting belt conveyor to load the material box on one side of the track, and then start the No. I track electric flat car (1-6) and No. II track electric flat car (2-6) to transport the circulating material box (5) to the outdoor work area. ③ After the No. I track electric flatcar (1-6) and No. II track electric flatcar (2-6) travel to the outdoor work area and stop, the outdoor finished product crane (3-2) lifts the circulating material box (5) and places it on the material box support (3-5); for dry briquetting, the finished product crane (3-2) directly lifts the circulating material box (5) and loads it onto the vehicle. ④ After the ball material is placed on the material box support (3-5), it is quickly dried under the high-velocity air in the air passage formed by the figure-eight open wind-gathering wing wall (3-4), the corner reinforced concrete column reinforced concrete enclosure wall (3-3), the adjustable-angle cylindrical condenser, the factory wall adjacent to the track support beam (3-1), and the high temperature formed by the condenser concentrating sunlight. ⑤ Load the dried ball material into the circulating hopper according to the first-in, first-out principle; ⑥ The vehicle transports the circulating material box (5) to the user's warehouse. Pull out the pull-out gate (5-8) at the rear of the material box, open the rear panel, and pour the ball material in the material box into the underground warehouse. ⑦ After unloading, return the carriage to its original position, fasten the rear panel, and put back the material box pull-out gate (5-8); ⑧ The specially modified transport vehicle returns to the outdoor working area of ​​the briquetting plant. The outdoor crane places the empty circulating material box (5) on the material box bracket (3-5) or directly on the electric flat car and drives into the plant to collect the briquetting material. (2) Operation Mode 2 ① After the ball outlet of the briquetting machine, a short belt conveyor with multiple pulleys is connected and extends to the outdoor working area. The ball material is output to the circulating material box placed in advance on the material box support (3-5) by the lifting belt. When one material box is full, the direction of the lifting belt is adjusted to output the ball material to another adjacent material box. In case of electric flat car failure, or when the production line is built, this mode is considered and no track or flat car is set up. ② After the briquettes are placed on the material box support (3-5), they are rapidly dried under the high-velocity airflow formed by the air passage formed by the figure-eight-shaped wind-gathering wing wall (3-4), the reinforced concrete wall reinforced with corner reinforced concrete columns (3-3), the adjustable-angle cylindrical condenser, and the factory wall adjacent to the track support beam (3-1), as well as the high temperature formed by the condenser concentrating sunlight; dry briquetting does not require this drying process. ③ Load the dried pellet bins onto the truck according to the first-in, first-out principle; ④ The vehicle transports the above circulating material box (5) to the user's warehouse. Pull out the pull-out gate (5-8) at the rear of the material box, open the rear panel, and pour the ball material in the material box into the underground warehouse. ⑤ After unloading, return the carriage to its original position, fasten the rear panel, and put the material box pull-out gate (5-8) back in; ⑥ The specially modified transport vehicle returns to the outdoor working area of ​​the briquetting plant. The outdoor crane places the empty circulating material box (5) on the material box support (3-5) or directly on the electric flat car and drives into the plant to receive the briquetting material.

9. A method for reducing powder content and accelerating drying of cold-pressed pellets according to claim 8, characterized in that, In step ⑤ of operation mode 1 and step ③ of operation mode 2, there are two loading methods: A. Pass two thick steel wire ropes with rope loops at both ends through the lifting hole plate (5-9) on the circulating material box, and then use the finished crane (3-2) to lift the circulating material box (5) into the specially modified transport vehicle. The inner side of the car body is welded with roller grooves and rollers. The rear of the car body has a horizontal stop (8-3) made of alloy steel square rod with a thickness of 20-50mm that passes through the rear of the car body and a vertical stop (8-4) inserted into the rear of the car body floor to block the circulating material box (5) when unloading. Two circulating material boxes (5) are placed in each car. Then insert the rear stop and close the rear car body. B. Align the rear of the specially modified transport vehicle with the material box bracket (3-5), so that the roller groove (6-4) on the vehicle and the material box bracket (3-5) are in a straight line and close to the end of the roller groove on the vehicle. Pull out the pin (6-10) on the safety device at one end of the material box bracket (3-5), and push it from the rear to make the circulating material box (5) slide into the specially modified transport vehicle compartment; put 2 material boxes in each vehicle, and then insert the tail stop and close the rear compartment.

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