Preparation method of metallurgical coke powder cold-pressed pellets

Abstract

The invention relates to the technical field of metallurgical coke powder, and discloses a preparation method of metallurgical coke powder cold-pressed pellets, which comprises the following steps: S1, feeding: putting a prepared coke powder raw material into a stock bin (2) through a forklift, and providing the material for the next procedure conveniently by the material in the stock bin (2); the method has the following advantages and effects that the formed coke is high in forming rate and uniform in particle size, wet pellets fall for more than two times at 1.5 m to be complete, the drying strength can reach more than 150 kg, the firing heat strength at 1100 DEG C is more than 40 kg, the furnace burden requirement is met, the formed coke replaces coke to serve as a reducing agent to be put into a blast furnace for ironmaking, the framework effect is provided, and the formed coke is suitable for large-scale production. According to the present invention, the air permeability in the blast furnace is improved, the fine coke powder particles can be tightly combined together by adding the coke powder binder so as to form the high-strength unbreakable pellet, the coke powder can easily form the regular and uniform pellet shape during the cold press molding process, and the prepared pellet can easily improve the smelting efficiency and the product quality.

Description

Technical Field

[0001] The invention relates to the technical field of metallurgical coke powder, and in particular to a method for preparing metallurgical coke powder cold-pressed pellets. Background Art

[0002] Modern blast furnaces have a history of hundreds of years, and their technology has reached a fairly perfect level. However, as it becomes increasingly perfect and large-scale, it also brings problems such as long process, large investment and environmental pollution. Due to the increasing shortage of coking coal resources, the gradual aging of coke ovens and people's increasing concern about coke oven pollution, people usually use "with or without pre-reduction" to divide molten reduction into "one-step" molten reduction and "two-step" molten reduction. At present, the molten reduction process mostly adopts the two-step method, that is, the ore is first pre-reduced in a vertical furnace (lump ore) or a fluidized bed (powder ore), and then enters the final reduction furnace. Coal and oxygen are added to the final reduction furnace, and the coal combustion produces heat and reducing gases such as H2 and CO. The ore that has passed the pre-reduction process is melted and further reduced to produce molten iron and slag, and H2 and CO are used as reducing agents for the reduction furnace.

[0003] However, the existing metallurgical coke powder cold-pressed pellets have the problems of low coke forming rate and uneven particle size. Summary of the invention

[0004] The purpose of the present invention is to provide a method for preparing metallurgical coke powder cold-pressed pellets, which can solve the problems raised in the above background technology.

[0005] The above technical objectives of the present invention are achieved through the following technical solutions: A method for preparing metallurgical coke powder cold-pressed pellets, comprising a base, a conveyor belt and a coke powder molding machine, the base, the upper surface of the base is fixedly connected with a stirring bin, one side of the stirring bin is fixedly connected with a bracket, the upper surface of the bracket is fixedly connected with a motor, the output end of the motor is fixedly connected with a first gear, the first gear is meshed with a second gear, one side of the first gear and the second gear are fixedly connected with a stirring shaft, the surface of the stirring shaft is fixedly connected with a stirring blade, one side of the coke powder molding machine is fixedly connected with a second conveyor belt, the lower surface of the coke powder molding machine is fixedly connected with a frame, the inside of the frame is fixedly connected with a motor, the output end of the motor is fixedly connected with a third gear, the third gear is meshed with a chain, the chain is meshed with a fourth gear, one side of the fourth gear is fixedly connected with a fifth gear, the fifth gear is meshed with a sixth gear, the insides of the fifth gear and the sixth gear are fixedly connected with a rotating rod, the surface of the rotating rod is fixedly connected with a cylinder, and the surface of the cylinder is provided with a pressing groove.

[0006] By adopting the above technical scheme, the coke powder is poured into the mixing bin, fully crushed in the mixing bin so that the particles meet the grading requirements, and the ingredients are proportioned according to the grading. The coke powder binder (the amount added is 5% to 7% of the coke powder) is added to the mixing bin and stirred evenly. Then water (the amount of water is 20% to 25%) is added to the mixing bin and stirred evenly. Finally, the coke powder is poured into the coke powder forming machine → dried in the drying furnace → crushed in the crusher → finished product warehouse. The forming rate of the coke is high, the particle size is uniform, the wet ball falls more than twice at 1.5m and is intact, the drying strength can reach more than 150kg, and the 1100℃ burning heat intensity is more than 40kg, which meets the requirements of the charge. The coke is used as a reducing agent instead of coke to be put into the blast furnace for ironmaking, and provides a skeleton effect to improve the air permeability in the blast furnace.

[0007] The present invention is further configured as follows: a top cover is overlapped on the upper surface of the mixing chamber, and a handle is fixedly connected to the upper surface of the top cover.

[0008] By adopting the above technical solution, the provision of the top cover can prevent debris and waste from entering the mixing chamber after use.

[0009] The present invention is further configured as follows: a protective cover is fixedly connected to the surface of the handle, and an anti-slip protrusion is fixedly connected to the surface of the protective cover.

[0010] By adopting the above technical solution, the setting of the handle can facilitate the staff to open the top cover.

[0011] The present invention is further configured as follows: the number of the pressing grooves is several, and the several pressing grooves are arranged on the surface of the cylinder in the form of an annular array.

[0012] By adopting the above technical solution, the arrangement of multiple pressing grooves makes the forming faster and the working efficiency higher.

[0013] The present invention is further configured as follows: a notch is provided on one side of the mixing bin, and a discharge pipe is fixedly connected to the interior of the notch.

[0014] By adopting the above technical solution, the setting of the discharge pipe can facilitate the discharge of materials.

[0015] The present invention is further configured as follows: a slot is provided on the upper surface of the discharge pipe, and a plug plate is plugged into the interior of the slot.

[0016] By adopting the above technical solution, the staff can discharge the materials by pulling up the insert plate.

[0017] The present invention is further configured as follows: a U-shaped rod is fixedly connected to the top end of the plug board, and a limiting strip is fixedly connected to the bottom end of the plug board.

[0018] By adopting the above technical solution, the setting of the U-shaped rod can facilitate the staff to lift the plug board.

[0019] The present invention is further configured as follows: a rubber sleeve is fixedly connected to the surface of the U-shaped rod, and an anti-slip pattern is provided on the surface of the rubber sleeve.

[0020] By adopting the above technical solution, the provision of the anti-slip pattern can increase the friction between the rubber sleeve and the hands of the staff.

[0021] The present invention is further configured as follows: a bracket is fixedly connected to the lower surface of the conveyor belt, and a connecting rod is fixedly connected to the interior of the bracket.

[0022] By adopting the above technical solution, the setting of the connecting rod can enhance the stability of the bracket.

[0023] The present invention is further configured as follows: a method for preparing metallurgical coke powder cold pressed pellets, comprising the following steps:

[0024] S1: Loading, the prepared coke powder raw materials are put into the silo by a forklift, and the materials are placed in the silo to facilitate the supply of materials to the next process;

[0025] S2: Crushing: the materials in the silo are crushed by the crushing mechanism. The materials are fully crushed so that the material particles meet the grading requirements, so as to facilitate the preparation of pellets in the later stage.

[0026] S3: Batching: Batching the crushed materials according to the grade. Batching according to the grade is to ensure the quality of the later pellet production, optimize the pelletizing performance and improve the roasting performance;

[0027] S4: stirring, the batched materials are stirred by a stirring device, and coke powder binder is added during the stirring process so that the materials and the coke powder binder can be fully mixed. A proper amount of water can be added during the stirring process so that the coke powder binder and the materials can fully react chemically. The addition of coke powder binder can make the fine coke powder particles tightly combined together to form high-strength and non-breakable pellets. Secondly, the coke powder is easier to form a regular and uniform pellet shape during the cold pressing process. At the same time, the use of prepared pellets helps to improve smelting efficiency and product quality;

[0028] S5: molding, after the stirring is completed, putting it into a coke powder molding machine, and the coke powder molding machine prepares wet metallurgical coke powder cold pressed pellets;

[0029] S6: Drying: placing the wet metallurgical coke powder cold pressed pellets into a drying furnace for drying, and producing dry metallurgical coke powder cold pressed pellets after the drying is completed;

[0030] S7: Finished products are crushed out. To meet the needs of later use, the dry metallurgical coke powder cold pressed pellets are crushed by a crusher to crush them into particles with uniform particle size. Finally, the products are formed and put into the finished product warehouse.

[0031] The invention has the following beneficial effects: the coke powder is poured into a mixing bin, fully crushed in the mixing bin, so that the particles meet the grading requirements, and the ingredients are proportioned according to the grading, and a coke powder binder (the amount added is 5% to 7% of the coke powder) is added in the mixing bin and stirred evenly, and then water (the amount of water is 20% to 25%) is added in the mixing bin and stirred evenly, and finally poured into a coke powder forming machine, drying furnace drying, crushing by a crusher, and finished product warehouse, the forming rate of the molded coke is high, the particle size is uniform, the wet ball falls more than 2 times at 1.5m and is intact, the drying strength can reach more than 150kg, the 1100℃ burning heat strength is greater than 40kg, and the furnace charge requirements are met. The molded coke replaces coke as a reducing agent for blast furnace ironmaking, and provides a skeleton effect to improve the air permeability in the blast furnace, and the addition of the coke powder binder can make the fine coke powder particles tightly combined together to form high-strength and non-breakable pellets, and secondly, the coke powder is more likely to form a regular and uniform pellet shape during the cold pressing process, and at the same time, the use of the prepared pellets is helpful to improve the smelting efficiency and product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. 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 creative work.

[0033] Figure 1 It is a structural schematic diagram of the present invention;

[0034] Figure 2 It is a structural schematic diagram of the framework of the present invention;

[0035] Figure 3 It is a structural schematic diagram of the mixing bin of the present invention;

[0036] Figure 4 It is a structural schematic diagram of the conveyor belt of the present invention;

[0037] Figure 5 For the present invention Figure 2 The enlarged structural diagram at A in the middle;

[0038] Figure 6 For the present invention Figure 1 Enlarged structural diagram at B in the middle.

[0039] In the figure, 1. base; 2. mixing bin; 3. motor; 4. first gear; 5. second gear; 6. mixing blade; 7. conveyor belt; 8. coke powder forming machine; 9. second conveyor belt; 10. frame; 11. motor; 12. third gear; 13. chain; 14. fourth gear; 15. fifth gear; 16. sixth gear; 17. cylinder; 18. pressing groove; 19. top cover; 20. discharge pipe; 21. plug plate;. DETAILED DESCRIPTION

[0040] The technical solution of the present invention will be clearly and completely described below in conjunction with specific embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than 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.

[0041] Reference Figure 1-6 A method for preparing metallurgical coke powder cold-pressed pellets comprises a base 1, a conveyor belt 7 and a coke powder forming machine 8. A stirring bin 2 is fixedly connected to the upper surface of the base 1. A notch is provided on one side of the stirring bin 2. A discharge pipe 20 is fixedly connected to the inside of the notch. A slot is provided on the upper surface of the discharge pipe 20. A plug-in plate 21 is plugged into the inside of the slot. A U-shaped rod is fixedly connected to the top of the plug-in plate 21. A limit strip is fixedly connected to the bottom of the plug-in plate 21. A rubber sleeve is fixedly connected to the surface of the U-shaped rod. The surface of the rubber sleeve is provided with anti-slip grooves. A top cover 19 is overlapped on the upper surface of the stirring bin 2. The upper surface of the top cover 19 is fixedly connected to the A handle is connected, a protective cover is fixedly connected to the surface of the handle, and an anti-slip protrusion is fixedly connected to the surface of the protective cover. A bracket is fixedly connected to one side of the stirring bin 2, and a motor 3 is fixedly connected to the upper surface of the bracket. A first gear 4 is fixedly connected to the output end of the motor 3, and the first gear 4 is meshed with a second gear 5. A stirring shaft is fixedly connected to one side of the first gear 4 and the second gear 5, and a stirring blade 6 is fixedly connected to the surface of the stirring shaft. A second conveyor belt 9 is fixedly connected to one side of the coke powder forming machine 8, and a frame 10 is fixedly connected to the lower surface of the coke powder forming machine 8. The coke powder is poured into the stirring bin and fully crushed in the stirring bin. , so that the particles meet the grading requirements, according to the grading ingredients, add coke powder binder (the amount is 5% to 7% of the coke powder) in the mixing bin and stir evenly, then add water (the amount of water is 20% to 25%) in the mixing bin and stir evenly, and finally pour it into the coke powder forming machine → drying furnace drying → crushing in the crusher → finished product warehouse. The coke forming rate is high, the particle size is uniform, the wet ball falls more than 2 times at 1.5m, the drying strength can reach more than 150kg, and the 1100℃ burning heat strength is more than 40kg, which meets the requirements of the furnace charge. This type of coke replaces coke as a reducing agent to be added to the blast furnace for ironmaking, and provides a skeleton effect to improve the permeability of the blast furnace. The frame 10 is fixedly connected to a motor 11 inside, and a third gear 12 is fixedly connected to an output end of the motor 11. The third gear 12 is meshed with a chain 13, and the chain 13 is meshed with a fourth gear 14. A fifth gear 15 is fixedly connected to one side of the fourth gear 14, and the fifth gear 15 is meshed with a sixth gear 16. A rotating rod is fixedly connected inside the fifth gear 15 and the sixth gear 16, and a cylinder 17 is fixedly connected to the surface of the rotating rod. A pressing groove 18 is provided on the surface of the cylinder 17. The number of the pressing grooves 18 is several, and the several pressing grooves 18 are provided on the surface of the cylinder 17 in the form of a ring array.

[0042] Specifically, the method for preparing metallurgical coke powder cold pressed pellets comprises the following steps:

[0043] S1: Loading, the prepared coke powder raw materials are put into the silo 2 by a forklift, and the materials are placed in the silo 2 to facilitate the supply of materials to the next process;

[0044] S2: Crushing: the material in the silo 2 is crushed by the crushing mechanism, and the material is fully crushed so that the material particles meet the grading requirements, so as to facilitate the preparation of pellets in the later stage;

[0045] S3: Batching: Batching the crushed materials according to the grade. Batching according to the grade is to ensure the quality of the later pellet production, optimize the pelletizing performance and improve the roasting performance;

[0046] S4: stirring, the batched materials are stirred by a stirring device, and coke powder binder is added during the stirring process so that the materials and the coke powder binder can be fully mixed. A proper amount of water can be added during the stirring process so that the coke powder binder and the materials can fully react chemically. The addition of coke powder binder can make the fine coke powder particles tightly combined together to form high-strength and non-breakable pellets. Secondly, the coke powder is easier to form a regular and uniform pellet shape during the cold pressing process. At the same time, the use of prepared pellets helps to improve smelting efficiency and product quality;

[0047] S5: molding, after the stirring is completed, it is put into the coke powder molding machine 8, and the coke powder molding machine 8 prepares wet metallurgical coke powder cold pressed pellets;

[0048] S6: Drying: placing the wet metallurgical coke powder cold pressed pellets into a drying furnace for drying, and producing dry metallurgical coke powder cold pressed pellets after the drying is completed;

[0049] S7: Finished products are crushed out. To meet the needs of later use, the dry metallurgical coke powder cold pressed pellets are crushed by a crusher to crush them into particles with uniform particle size. Finally, the products are formed and put into the finished product warehouse.

[0050] The amount of the coke powder binder added in step S4 is 5-7% of the coke powder, and the amount of water added in step S4 is 20%-25%.

[0051] In the present invention, coke powder is poured into a mixing bin, fully crushed in the mixing bin, so that the particles meet the grading requirements, and the coke powder binder (the amount added is 5% to 7% of the coke powder) is added to the mixing bin according to the grading and stirred evenly, and then water (the amount of water is 20% to 25%) is added to the mixing bin and stirred evenly, and finally poured to a coke powder forming machine, drying furnace, crushing machine, and finished product warehouse. The molded coke has a high forming rate and uniform particle size, and the wet ball falls more than 2 times at 1.5m and is intact. The drying strength can reach more than 150kg, and the 1100℃ burning heat strength is greater than 40kg, which meets the requirements of furnace charge. The molded coke replaces coke as a reducing agent to be added to a blast furnace for ironmaking, and provides a skeleton effect to improve the air permeability in the blast furnace. In addition, the addition of the coke powder binder can make the fine coke powder particles tightly combined together to form high-strength and non-breakable pellets. Secondly, the coke powder is more likely to form a regular and uniform pellet shape during the cold pressing process. At the same time, the use of the prepared pellets is helpful to improve the smelting efficiency and product quality.

[0052] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for preparing metallurgical coke powder cold pressed pellets, comprising the following steps: S1: Loading, the prepared coke powder raw material is put into the silo (2) by a forklift, and the material is in the silo (2) so that it is convenient to provide material for the next process; S2: crushing, the material in the silo (2) is crushed in a crushing mechanism, and the material is fully crushed so that the material particles meet the grading requirements, so as to facilitate the preparation of pellets in the later stage; S3: Batching: Batching the crushed materials according to the grade. Batching according to the grade is to ensure the quality of the later pellet production, optimize the pelletizing performance and improve the roasting performance; S4: stirring, the batched materials are stirred by a stirring device, and coke powder binder is added during the stirring process so that the materials and the coke powder binder can be fully mixed. A proper amount of water can be added during the stirring process so that the coke powder binder and the materials can fully react chemically. The addition of coke powder binder can make the fine coke powder particles tightly combined together to form high-strength and non-breakable pellets. Secondly, the coke powder is easier to form a regular and uniform pellet shape during the cold pressing process. At the same time, the use of prepared pellets helps to improve smelting efficiency and product quality; S5: forming, after the stirring is completed, putting it into a coke powder forming machine (8), and the coke powder forming machine (8) prepares wet metallurgical coke powder cold pressed pellets; S6: Drying: placing the wet metallurgical coke powder cold pressed pellets into a drying furnace for drying, and producing dry metallurgical coke powder cold pressed pellets after the drying is completed; S7: Finished products are crushed out. To meet the needs of later use, the dry metallurgical coke powder cold pressed pellets are crushed by a crusher to crush them into particles with uniform particle size. Finally, the products are formed and put into the finished product warehouse.

2. The method for preparing metallurgical coke powder cold pressed pellets according to claim 1, characterized in that: The amount of the coke powder binder added in step S4 is 5-7% of the coke powder.

3. The method for preparing metallurgical coke powder cold pressed pellets according to claim 1, characterized in that: The amount of water added in step S4 is 20%-25%.

4. The method for preparing metallurgical coke powder cold pressed pellets according to any one of claims 1 to 3, characterized in that: The invention comprises a base (1), a conveyor belt (7) and a coke powder forming machine (8), wherein the upper surface of the base (1) is fixedly connected to a stirring chamber (2), one side of the stirring chamber (2) is fixedly connected to a bracket, the upper surface of the bracket is fixedly connected to a motor (3), the output end of the motor (3) is fixedly connected to a first gear (4), the first gear (4) is meshed with a second gear (5), one side of the first gear (4) and the second gear (5) are both fixedly connected to a stirring shaft, the surface of the stirring shaft is fixedly connected to a stirring blade (6), one side of the coke powder forming machine (8) is fixedly connected to a second conveyor belt (9), the lower surface of the coke powder forming machine (8) is fixedly connected to a frame (10), the interior of the frame (10) is fixedly connected to a motor (11), the output end of the motor (11) is fixedly connected to a third gear (12), the third gear (12) is meshed with a chain (13) The chain (13) is meshed with a fourth gear (14), a fifth gear (15) is fixedly connected to one side of the fourth gear (14), the fifth gear (15) is meshed with a sixth gear (16), a rotating rod is fixedly connected inside the fifth gear (15) and the sixth gear (16), a cylinder (17) is fixedly connected to the surface of the rotating rod, a pressing groove (18) is provided on the surface of the cylinder (17), a top cover (19) is overlapped on the upper surface of the mixing chamber (2), a handle is fixedly connected to the upper surface of the top cover (19), a protective cover is fixedly connected to the surface of the handle, an anti-slip protrusion is fixedly connected to the surface of the protective cover, the number of the pressing grooves (18) is several, and the several pressing grooves (18) are provided on the surface of the cylinder (17) in the form of a ring array, a notch is provided on one side of the mixing chamber (2), a discharge pipe (20) is fixedly connected inside the notch.

5. The method for preparing metallurgical coke powder cold pressed pellets according to claim 4, characterized in that: The upper surface of the discharge pipe (20) is provided with a slot, and a plug plate (21) is plugged into the interior of the slot.

6. The method for preparing metallurgical coke powder cold pressed pellets according to claim 5, characterized in that: The top end of the plugging plate (21) is fixedly connected to a U-shaped rod, and the bottom end of the plugging plate (21) is fixedly connected to a limiting strip.

7. The method for preparing metallurgical coke powder cold pressed pellets according to claim 6, characterized in that: A rubber sleeve is fixedly connected to the surface of the U-shaped rod, and anti-slip grooves are provided on the surface of the rubber sleeve. A bracket is fixedly connected to the lower surface of the conveyor belt (7), and a connecting rod is fixedly connected to the interior of the bracket.

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