A coke test system and method

Abstract

The present invention discloses a coke test system and method, which improves work efficiency, reduces labor intensity, and improves the accuracy of test results. A coke test system includes: a mechanical flat sieve device for screening coke balls of required particle sizes; a dryer for drying the screened coke balls; a loss-in-weight scale for weighing the dried coke balls of required weight; a high-temperature electric furnace for putting the coke balls weighed by the loss-in-weight scale and conducting a reactivity test; a Type I drum device for conducting a drum test on the reacted coke balls; the mechanical flat sieve device is further used for screening out waste residues from the coke waste after the drum test, a platform scale for weighing the reacted coke balls and weighing the remaining coke waste after screening out the waste residues.

Description

Technical Field

[0001] The present invention relates to the technical field of coke physical and chemical property detection, and particularly to a coke test system and method. Background Art

[0002] Coke is a solid product of high-temperature carbonization. Its main component is carbon, and it has a cracked and irregular pore structure (or porous structure with pores). The number of cracks directly affects the strength and shatter resistance of coke, and its index is generally measured by the crack degree (the length of cracks per unit volume of coke). Coke is an important energy source and is very cheap, so most of the coke in the world is used for ironmaking. Coke is a solid fuel, hard, porous, with a high calorific value, made by high-temperature carbonization of coal, and is mostly used for ironmaking. Coke is usually classified into metallurgical coke (including blast furnace coke, foundry coke, ferroalloy coke, etc.), gasification coke, coke for calcium carbide, etc. Coke is the most important product of coking. More than 90% of the coke in most countries is used for blast furnace ironmaking. The use of coke instead of charcoal in blast furnaces laid the foundation for the large-scale development of modern blast furnaces and was a major milestone in the history of metallurgy. Coke is also used in casting and the blast furnace smelting of non-ferrous metals such as copper, lead, zinc, titanium, antimony, and mercury, acting as a reducing agent, heating agent, and column skeleton. To achieve better technical and economic indicators in blast furnace operation, the coke used for smelting (metallurgical coke) must have appropriate chemical and physical properties, including thermal properties during the smelting process.

[0003] Currently, coking coal resources are scarce worldwide. The large-scale development of blast furnaces requires higher quality and stability of coke, while the amount of strongly caking coal in coking coal resources is decreasing. To obtain high-quality coking coal, it is necessary to master the key links of predicting and controlling coke quality. Considering economic benefits and practical situations, each coking plant is committed to the research of coal blending schemes. Although the newly developed coking technologies in recent years have solved some problems to a certain extent, such as the use of weakly caking coal and the expansion of the range of coking coal, there are still urgent problems to be solved, such as improving the coal blending structure, enhancing and stabilizing coke quality, and controlling production costs. Therefore, some large and medium-sized enterprises have carried out research on coke quality prediction in combination with their own characteristics, predicting coke quality using various property indicators of single coal and blended coal, and determining an economic and reasonable coal blending ratio through fewer coal blending tests.

[0004] Currently, the equipment for testing the thermal stability index of test coke at high temperature is usually a traditional electric furnace, which is heated, sampled, and tested manually. It has the disadvantages of high labor intensity, poor working environment, large heat radiation damage, inaccurate test data, and lack of automatic control means. Therefore, a system with high test accuracy, convenient use and maintenance, safety and reliability, and a relatively high degree of automation throughout the process is needed to complete the coke reactivity and reaction strength tests. Summary of the Invention

[0005] The object of the present invention is to overcome the deficiencies of the prior art and provide a coke test system and method, which improve work efficiency, reduce labor intensity, and improve the accuracy of test results.

[0006] The object of the present invention is achieved as follows:

[0007] A coke test system includes:

[0008] A mechanical flat screen device for screening coke balls of the required particle size;

[0009] A dryer for drying the screened coke balls;

[0010] A weighing scale for weighing the required weight of the dried coke balls;

[0011] A high-temperature electric furnace for placing the coke balls weighed by the weighing scale and conducting a reactivity test;

[0012] A type-I drum device for conducting a drum test on the reacted coke balls;

[0013] The mechanical flat screen device is also used to screen out waste residues from the coke waste after the drum test,

[0014] A platform scale for weighing the reacted coke balls and the residual coke waste after screening out the waste residues.

[0015] Preferably, it further includes:

[0016] A screen plate placement rack for placing the screen plates of the mechanical flat screen device;

[0017] A gas supply system, which is connected to the high-temperature electric furnace and used to introduce nitrogen or carbon dioxide;

[0018] A waste recovery machine for loading the waste after the test.

[0019] Preferably, it further includes a manipulator, which is used to perform test process operations. The screen plate placement rack, mechanical flat screen device, dryer, weighing scale, waste recovery machine, high-temperature electric furnace, type-I drum device, and platform scale are placed in a ring shape, and the manipulator is arranged in the middle of the ring.

[0020] Preferably, it further includes a PLC control system. The high-temperature electric furnace, type-I drum device, mechanical flat screen device, manipulator, and gas supply system are respectively connected to the PLC control system, and the PLC control system is used for test process control.

[0021] Preferably, the type-I drum device includes a drum body, a drum cover, a solid rack, a reduction motor, a drum seat, a lid opening and closing cylinder assembly, a drum receiving device, a clamping cylinder, a movable bracket, and a slide rail;

[0022] The slide rail is arranged on the top of the movable bracket. A slider and a motor for driving the slider are provided on the slide rail. The opening and closing cover cylinder assembly includes a cylinder and an opening and closing cover pressing plate. The cylinder is vertically arranged, the upper end of the cylinder is installed on the slider, and the opening and closing cover pressing plate is installed at the lower end of the cylinder, and is used to drive the opening and closing cover pressing plate to reciprocate along the slide rail through the slider. The opening and closing cover pressing plate is used to cooperate with the lifting of the cylinder to realize the extraction and lowering of the drum cover.

[0023] The drum base is located below the slide rail. The reduction motor is fixed on the drum base. The solid frame is fixed on the rotating shaft of the reduction motor. The side wall of the drum body is connected to the solid frame and can be disassembled, and is used to drive the drum body to rotate through the reduction motor.

[0024] The drum feeding device is located below the slide rail. The drum feeding device includes a hopper and a hopper frame. The hopper is placed above the hopper frame. The hopper is used to put the coke sample. A support structure is provided in the hopper frame for placing the drum body. Clamping cylinders are arranged on both sides of the hopper frame for clamping the drum body. The hopper is used to introduce the coke sample into the drum body.

[0025] It further includes a counter. The counter is connected to the reduction motor. When the drum body rotates to the set number of turns, the counter issues a control signal to turn off the reduction motor.

[0026] A control switch is provided on the cylinder to control the stroke of the cylinder.

[0027] Preferably, the number of the opening and closing cover cylinder assemblies is two. The two opening and closing cover cylinder assemblies are symmetrically arranged on the slide rail. A bayonet structure is provided on the opening and closing cover pressing plate for clamping connection with the drum cover. The two opening and closing cover pressing plates realize the clamping of the drum cover.

[0028] Locking switches are provided on the drum cover and the drum body. The locking switch on the drum cover is used to lock the drum cover on the drum body. When the opening and closing cover pressing plate realizes the clamping of the drum cover, the manipulator simultaneously presses the corresponding locking switch to release the locking of the drum cover, so that the opening and closing cover pressing plate can move upward through the cylinder to remove the drum cover.

[0029] The locking switch on the drum body is used to lock the drum body on the solid frame. When the manipulator realizes the grasping of the drum cover, the manipulator simultaneously presses the corresponding locking switch to release the locking of the drum body, so that the manipulator can carry the drum body.

[0030] Preferably, the output shaft of the reduction motor is connected to the middle part of the solid frame.

[0031] Preferably, the cylinder is a pull rod type cylinder.

[0032] Preferably, the control switch is a solenoid valve.

[0033] Preferably, the high-temperature electric furnace comprises a furnace shell and a reactor. The reactor has a sealing cover provided with a snap fastener. The furnace shell is provided with a cylinder mounting plate and a locking seat. The locking seat includes a fixed angle seat and a fastening clamping plate. The fixed angle seat is fixed on the furnace shell. The fastening clamping plate is hinged to the fixed angle seat. The fixed angle seat is provided with a straight groove corresponding to the snap fastener, and the fastening clamping plate is provided with a J-shaped groove corresponding to the snap fastener. The straight groove is used to make way for the snap fastener, and the J-shaped groove is used to be clamped and positioned with the snap fastener. An opening and closing cylinder is arranged between the cylinder mounting plate and the fastening clamping plate. The opening and closing cylinder is used to drive the fastening clamping plate to rotate, so that the J-shaped groove on the fastening clamping plate is clamped and positioned with the snap fastener, or the clamping and positioning is released.

[0034] Preferably, the reactor is a horizontal furnace. A coke container is arranged in the reactor. Electric heating wires are wound around the outer wall of the reactor for heating the coke. One end of the reactor axially inserts a thermocouple for measuring the temperature inside the electric furnace. One end of the reactor is axially provided with an air inlet pipe, and an air outlet pipe is vertically arranged at one end of the reactor. The air outlet pipe passes through the cylinder mounting plate. A heat insulation layer is arranged between the reactor and the furnace shell, and a heat insulation board is installed on the furnace shell.

[0035] Preferably, the snap fastener is a Z-shaped rod. One end of the snap fastener is welded and fixed to the sealing cover, and the other end of the snap fastener is used to cooperate with the locking seat.

[0036] Preferably, the cylinder mounting plate is located above the sealing cover. The number of the locking seats is two, and the two locking seats are symmetrically arranged on both sides of the sealing cover.

[0037] Preferably, the stroke of the opening and closing cylinder is controlled by a solenoid valve.

[0038] A use method of a coke test system includes the following steps:

[0039] S1: The manipulator places the sieve plates of the required particle size on the mechanical flat sieve device, then pours the coke balls. The mechanical flat sieve device starts to work to screen the coke balls. Take the coke balls of the required particle size and put them into a dryer for drying. Weigh the required weight of the coke balls with a loss-in-weight scale and put them into the reactor. The weight is recorded as m. Connect the air inlet of the reactor to the gas supply system;

[0040] S2: The high-temperature electric furnace is heated up at a heating rate of 8 °C / min to 16 °C / min. When the temperature of the high-temperature electric furnace reaches 400 °C, nitrogen is introduced at a flow rate of 0.8 L / min to prevent the coke from burning. When the temperature of the high-temperature electric furnace reaches 1100 °C, it is stabilized for 10 min, the nitrogen is cut off, and carbon dioxide is introduced instead, with a flow rate of 5 L / min. The reaction lasts for 2 h. The heating is stopped, the carbon dioxide is cut off, and nitrogen is introduced instead, with a flow rate of 2 L / min until the temperature of the coke drops to room temperature, and then the nitrogen supply is stopped;

[0041] S3: Take out the reacted coke, weigh it using a platform scale and record the data. Denote the weight as m1, and send the weighing result to the computer. The computer calculates the reactivity of the coke according to the formula to calculate the reactivity of the coke;

[0042] S4: Put the reacted coke into the Type-I drum device for a drum test. The motor driving the slider operates, driving the opening and closing cover pressing plate to start moving from one end of the slide rail to directly above the drum cover. The air cylinder descends, driving the opening and closing cover pressing plate to engage with the drum cover. The air cylinder rises, and the drum cover is lifted, thus realizing the automatic opening of the drum cover;

[0043] The manipulator starts to assist. It transports the drum body from the fixed frame to the hopper rack. Then the clamping air cylinder starts to operate. At this time, the drum body is fixed in the hopper rack. Pour the coke sample into the hopper. The coke sample slides down along the inner wall of the hopper into the drum body. The clamping air cylinder contracts, releasing the fixed state of the drum body;

[0044] The manipulator starts to assist. It transports the drum body from the hopper rack to be fixed on the solid rack. The opening and closing cover pressing plate puts down the drum cover to seal the drum body;

[0045] The reduction motor operates, driving the drum body to rotate. When it rotates to the set number of turns, the counter sends a control signal to cut off the power supply of the reduction motor to stop it;

[0046] The opening and closing cover pressing plate extracts the drum cover. The motor driving the slider operates, driving the opening and closing cover pressing plate to move towards one end of the slide rail;

[0047] The manipulator starts to assist. It moves out the drum body, then dumps out the coke waste. The manipulator then transports the drum body back to the fixed frame. At this time, one movement cycle is completed;

[0048] S5: The manipulator replaces the sieve plate with a smaller sieve hole in the mechanical flat sieve device, then pours in the coke waste. The mechanical flat sieve device starts to work to screen out the waste residue. Weigh the weight of the remaining coke waste on the sieve plate using a platform scale, denote it as m2, and send the weighing result to the computer. The computer calculates the post-reaction strength according to the formula to calculate the post-reaction strength.

[0049] Due to the adoption of the above technical solutions, the present invention has the following beneficial effects:

[0050] 1. The present invention uses a manipulator, which reduces the labor intensity of operators and has the advantages of high test accuracy, convenient use and maintenance, safety and reliability, and automation of the whole process;

[0051] 2. The PLC control system provides reliable technical parameters for the selection of coke quality, which is beneficial to the stable operation of the blast furnace and the reduction of coke costs.

[0052] 3. After adopting the above solution, steel-making enterprises can clearly understand the quality of the purchased coke, providing a reference for coke selection. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] Figure 1 It is a schematic structural diagram of the present invention;

[0054] Figure 2 It is a schematic structural diagram of the mechanical flat screen device;

[0055] Figure 1 , Figure 2 In, 1. Screen plate placement rack; 2. Mechanical flat screen device; 3. Dryer; 4. Weighing scale for reduction; 5. Waste material recycling machine; 6. High-temperature electric furnace; 7. Type I drum device; 8. Platform scale; 9. Manipulator; 10. Gas supply system; 11. PLC control system; 13. Motor; 14. Reducer; 15. Moving frame; 16. Screen plate; 17. Flat screen frame; 18. Receiving hopper; 19. Receiving bucket;

[0056] Figure 3 It is a schematic structural diagram of the Type I drum provided by an embodiment of the present invention;

[0057] Figure 4 It is a schematic diagram of the Type I drum receiving device;

[0058] Figure 5 It is a schematic diagram of the Type I drum body;

[0059] Figures 3 - 5 In, 1. Drum body; 2. Drum cover; 3. Fixed frame; 4. Reduced-speed motor; 5. Drum frame; 6. Opening and closing cover cylinder assembly; 7. Drum receiving device; 8. Clamping cylinder; 9. Movable support; 10. Slide rail; 11. Counter; 12. Cylinder; 13. Opening and closing cover pressure plate; 14. Hopper; 15. Hopper frame.

[0060] Figure 6 It is a schematic structural diagram of the electric furnace device provided by an embodiment of the present invention;

[0061] Figure 7 It is a side view of the electric furnace device provided by an embodiment of the present invention;

[0062] Figure 8 It is a schematic internal structure diagram of the electric furnace device provided by an embodiment of the present invention;

[0063] Figure 9 It is a schematic structural diagram of the locking seat provided by an embodiment of the present invention;

[0064] Figures 6 - 9Among them: 1. Furnace shell; 5. Opening and closing cylinder; 6. Sealing cover; 7. Outlet pipe; 10. Locking seat; 13. Snap; 4. Inlet port; 15. Thermocouple; wherein: 2. Reactor; 3. Electric heating wire; 8. Heat preservation layer; 9. Heat insulation board; 14. Handle; 11. Fixed angle seat; 12. Buckling card board. Specific implementation mode

[0065] To make the purpose and technical solutions of the present invention clearer, the present invention will be further described below in conjunction with the drawings and embodiments. The schematic implementation modes and descriptions of the present invention are only used to understand the present invention and are not intended to limit the present invention.

[0066] From Figure 1 It can be seen that a coke reactivity and post-reaction strength test system designed by the present invention includes a sieve plate placement rack 1, a mechanical flat sieve device 2, a dryer 3, a weighing scale 4, a waste recycling machine 5, a high-temperature electric furnace 6, a type I drum device 7, a platform scale 8, a manipulator 9, a gas supply system 10, and a PLC control system 11.

[0067] From Figure 2 It can be seen that the mechanical flat sieve device includes a motor 13, a reducer 14, a moving frame 15, sieve plates 16, a flat sieve frame 17, a receiving hopper 18, and a receiving barrel 19.

[0068] From Figures 3 - 5 It can be seen that the type I drum device includes a drum body 1 (in a cuboid structure), a drum cover 2, a solid rack 3, a reduction motor 4, a drum seat 5, an opening and closing cover cylinder assembly 6, a drum receiving device 7, a clamping cylinder 8, a movable bracket 9, a slide rail 10, and a counter 11.

[0069] The slide rail 10 is arranged at the top of the movable bracket 9. A slider and a motor for driving the slider (the connection method is a screw-nut mechanism or an electric push rod) are arranged on the slide rail 10. The opening and closing cover cylinder assembly 6 includes a cylinder 12 and an opening and closing cover pressing plate 13. The cylinder 12 is vertically arranged, the upper end of the cylinder 12 is installed on the slider, and the opening and closing cover pressing plate 13 is installed at the lower end of the cylinder 12, and is used to drive the opening and closing cover pressing plate 13 to reciprocate along the slide rail 10 through the slider. The opening and closing cover pressing plate 13 is used to cooperate with the lifting of the cylinder 12 to realize the extraction and lowering of the drum cover 2;

[0070] The drum seat 5 is located below the slide rail 10. The reduction motor 4 is fixed on the drum seat 5. The solid rack 3 is fixed on the rotating shaft of the reduction motor 4. The side wall of the drum body 1 is connected to the solid rack 3 and can be disassembled, and is used to drive the drum body 1 to rotate through the reduction motor 4;

[0071] The drum feeding device 7 is located below the slide rail 10. The drum feeding device includes a hopper 14 and a hopper frame 15. The hopper 14 is placed above the hopper frame 15. The hopper 14 is used for putting coke samples. A support structure is provided inside the hopper frame 15 for placing the drum body 1. The clamping cylinders 8 are arranged on both sides of the hopper frame 15 for clamping the drum body 1. The hopper 14 is used for guiding the coke samples into the drum body 1.

[0072] The output shaft of the reduction motor 4 is connected to the middle of the solid frame 3. The cylinder 12 is an SC32×25 pull-rod type standard cylinder. A manipulator is also included, which is used to carry the drum body filled with coke samples from the drum feeding device to the fixed frame, and to carry the drum body not filled with samples from the fixed frame to the drum feeding device. A counter 11 is also included. The counter 11 is connected to the reduction motor 4. When the drum body 1 rotates to the set number of turns, the counter 11 sends a control signal to turn off the reduction motor 4. A control switch is provided on the cylinder to control the stroke of the cylinder. The control switch is a solenoid valve. A control system is also included. The control system is respectively connected to the reduction motor, the motor driving the slider, the counter, and the control switch, and is used to control the operation of the Type I drum device.

[0073] The number of the opening and closing cover cylinder assemblies 6 is two. The two opening and closing cover cylinder assemblies 6 are symmetrically arranged on the slide rail 10. A C-shaped bayonet structure is provided on the opening and closing cover pressing plate 13 for clamping with the drum cover 2 (with clamping plates on both sides for cooperating with the bayonet). The two opening and closing cover pressing plates 13 realize the clamping of the drum cover 2.

[0074] Locking switches are provided on the drum cover 2 and the drum body 1. The locking switch on the drum cover 2 is used to lock the drum cover 2 on the drum body 1. When the opening and closing cover pressing plate 13 realizes the clamping of the drum cover 2, the opening and closing cover pressing plate 13 simultaneously presses the corresponding locking switch to release the locking of the drum cover 2, so that the opening and closing cover pressing plate 13 can move upward through the cylinder 12 to remove the drum cover 2.

[0075] The locking switch on the drum body 1 is used to lock the drum body 1 on the solid frame 3. When the manipulator grasps the drum cover 2, the manipulator simultaneously presses the corresponding locking switch to release the locking of the drum body 1, so that the manipulator can carry the drum body 1.

[0076] The locking switch adopts a conventional elastic lock structure, which can be unlocked by pressing, or a door lock structure, which is locked when closed (put in), and unlocked when pressed (press the doorknob to open). Of course, a locking seat structure in a high-temperature electric furnace can also be adopted and controlled by a cylinder, without using a manipulator to unlock.

[0077] From Figures 6 - 9It can be seen that the high-temperature electric furnace includes a furnace shell 1, a reactor 2, electric heating wires 3, an opening and closing cylinder 5, a sealing cover 6, a heat preservation layer 8, a heat insulation board 9, a locking seat 10, and a solenoid valve (not shown).

[0078] The reactor 2 is a lightweight high-aluminum outer wire tube, with electric heating wires 3 wound around its outer wall, which is connected to a wire and used to heat the coke. The reactor 2 has an inlet pipe 4, an outlet pipe 7, a thermocouple 15, and a coke container, and the coke container has a handle 14. The inlet pipe 4 is provided at one end of the reactor 2, and the outlet pipe 7 is provided at one end of the reactor 2 close to the end cover and passes through the cylinder mounting plate;

[0079] A heat preservation layer of lightweight alumina bricks is provided between the outside of the reactor 2 and the furnace shell 1 to prevent a large amount of heat loss and maintain the stability of the temperature inside the furnace. The experimental electric furnace is a horizontal furnace, which provides heat for the reactor 2, and a heat insulation board 9 is installed on the outside of the shell.

[0080] The number of the locking seats 10 is two, and the two locking seats 10 are symmetrically arranged on both sides of the outlet of the reactor 2. The locking seat 10 includes a fixed angle seat 11 and a fastening clamping plate 12. The locking seat 10 is used to be clamped with the bayonet on the sealing cover 6, and the two locking seats 10 realize the fixation of the sealing cover 6;

[0081] The opening and closing cylinder 5 is arranged below the cylinder mounting plate, and the two opening and closing cylinders 5 are symmetrically arranged on both sides of the outlet of the reactor 2 and are hinged to the cylinder mounting plate and the fastening clamping plate 12, so that the free end of the fastening clamping plate 12 can move upward through the opening and closing cylinder 5. When the fastening clamping plate 12 moves upward, the buckle 13 on the sealing cover 6 can be removed from the locking seat 10, thereby releasing the locking of the sealing cover 6.

[0082] It also includes a manipulator, which is used to remove the sealing cover 6 (with a handle), put the coke container filled with coke samples into the electric furnace, and take out the coke container after the reaction from the electric furnace. A solenoid valve is provided on the opening and closing cylinder 5, and the solenoid valve is used to control the stroke of the cylinder, thereby driving the fastening clamping plate 12 to move up and down. The thermocouple 15 is used to measure the temperature inside the electric furnace, so as to realize the automatic control of the temperature inside the furnace.

[0083] The test steps for the reactivity and post-reaction strength of coke in the present invention are as follows:

[0084] S1: The manipulator places the sieve plates of the required particle size on the flat sieve frame, and then pours the completed coke balls. The mechanical flat sieve device starts to work. First, the motor drives the reducer to move, and the moving frame connected to the reducer also starts to make a horizontal reciprocating motion. In this embodiment, the reducer is connected to the moving frame through a crank-rocker mechanism, and the moving frame is slidably fitted or roller-fitted on the flat sieve frame. The moving frame drives the sieve plates to start making a horizontal reciprocating motion, and the material passes through the sieve holes for screening and impurity removal. Since each point on the sieve surface makes a planar circular motion, and the material makes a spiral downward movement relative to the sieve surface due to its own weight, the material is automatically classified, and impurities in the raw material are separated according to different particle sizes, realizing the screening of coke. Take the coke balls between 23 - 25 mm and put them into the dryer for drying. Weigh 200 ± 0.5 g of coke balls with a loss-in-weight scale and spread them flat in the reactor. Record the weight as m. Ensure that the coke layer in the reactor is in the middle of the constant temperature zone of the high-temperature electric furnace. Connect the gas inlet of the reactor to the gas supply system and check the gas path;

[0085] S2: The high-temperature electric furnace heats up at a heating rate of 8 °C / min - 16 °C / min. When the central temperature reaches 400 °C, nitrogen is introduced at a flow rate of 0.8 L / min to prevent coke burnout. When the central temperature reaches 1050 °C, preheat the carbon dioxide gas cylinder port to ensure stable outflow of carbon dioxide. When the central temperature reaches 1100 °C, stabilize for 10 min, cut off the nitrogen, and change to carbon dioxide with a flow rate of 5 L / min, and record the start reaction time. After introducing carbon dioxide, the central temperature should recover to 1100 °C ± 3 °C within 5 min - 10 min. React for 2 h, stop heating, cut off carbon dioxide, and change to nitrogen with a flow rate of 2 L / min.

[0086] S3: Take out the reacted coke, weigh it with a platform scale and record the data. Record the weight as m1, send the weighing result to the computer, and the processor in the computer calculates the coke reactivity according to the calculation model.

[0087] S4: Put the reacted coke into the Type I drum device for a drum test. The motor drives the cylinder to start working. The cylinder drives the opening / closing cover pressing plate to start moving from one end of the slide rail to directly above the drum cover. The opening / closing cover pressing plate contacts the drum cover, and the drum cover is extracted below the opening / closing cover pressing plate, thus realizing the automatic opening of the drum cover. The manipulator starts to assist in the work and transports the drum body into the hopper rack. Pour the coke sample into the receiving hopper, and the coke sample slides down along the inner wall of the hopper into the drum body. After the drum body is filled with the coke sample, the manipulator starts to assist in the work and transports the drum body from the hopper rack to the solid rack. At this time, the opening / closing cover pressing plate lowers the drum cover. The reduction motor drives the drum body to rotate. When it rotates to the set number of turns, the counter issues a control signal to cut off the power supply of the motor and stop it. Then the opening / closing cover pressing plate contacts the drum cover, and the drum cover is extracted below the opening / closing cover pressing plate again. The motor drives the cylinder to drive the opening / closing cover pressing plate to move towards one end of the slide rail.

[0088] S5: The manipulator takes out the drum body, pours out the coke after the drum test, screens it with a round hole sieve with a diameter of 10 mm, weighs the mass of the material on the sieve using a platform scale, and records the data, denoted as m2. Send the weighing result to the computer, and the processor in the computer calculates the post-reaction strength according to the calculation model.

[0089] S6: The manipulator directly pours the remaining coke into the waste material recycling machine for recycling.

[0090] The present invention uses a manipulator, which reduces the labor intensity of the operator, and has the characteristics of high test accuracy, convenient use and maintenance, safety and reliability, and automation of the whole process. The PLC control system provides reliable technical parameters for the selection of coke quality, which is beneficial to the stable operation of the blast furnace and the reduction of coke cost. After adopting the above scheme, steelmaking enterprises can clearly master the quality of the purchased coke, providing a reference for the selection of coke.

[0091] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention and are not restrictive. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the present invention.

Claims

1. A coke test system, characterized in that, Including: A mechanical flat screen device for screening coke balls of the required particle size; A dryer for drying the screened coke balls; A loss-in-weight scale for weighing the dried coke balls of the required weight; A high-temperature electric furnace for placing the coke balls weighed by the loss-in-weight scale and conducting a reactivity test; A Type-I drum device for conducting a drum test on the reacted coke balls; The mechanical flat screen device is also used to screen out waste residues from the coke waste after the drum test; A platform scale for weighing the reacted coke balls and the residual coke waste after screening out the waste residues; Also including: A screen plate placement rack for placing the screen plates of the mechanical flat screen device; A gas supply system, which is connected to the high-temperature electric furnace. The gas supply system can separately introduce nitrogen or carbon dioxide; A waste recovery machine for loading the waste after the test; Also including a manipulator. The manipulator is used for operating the test process. The screen plate placement rack, mechanical flat screen device, dryer, loss-in-weight scale, waste recovery machine, high-temperature electric furnace, Type-I drum device and platform scale are placed in a ring shape, and the manipulator is arranged in the middle of the ring; The Type-I drum device includes a drum body, a drum cover, a solid rack, a reduction motor, a drum seat, an opening and closing cover cylinder assembly, a drum receiving device, a clamping cylinder, a movable bracket and a slide rail; The slide rail is arranged at the top of the movable bracket. A slider and a motor for driving the slider are provided on the slide rail. The opening and closing cover cylinder assembly includes a cylinder and an opening and closing cover pressure plate. The cylinder is vertically arranged, and the upper end of the cylinder is installed on the slider. The opening and closing cover pressure plate is installed at the lower end of the cylinder and is used to drive the opening and closing cover pressure plate to reciprocate along the slide rail through the slider. The opening and closing cover pressure plate is used to cooperate with the lifting of the cylinder to extract and lower the drum cover; The drum seat is located below the slide rail. The reduction motor is fixed on the drum seat. The solid rack is fixed on the rotating shaft of the reduction motor. The side wall of the drum body is connected to the solid rack and can be disassembled, and is used to drive the drum body to rotate through the reduction motor; The drum receiving device is located below the slide rail. The drum receiving device includes a hopper and a hopper rack. The hopper is placed above the hopper rack. The hopper is used to put the coke sample. A support structure is provided in the hopper rack for placing the drum body. The clamping cylinders are arranged on both sides of the hopper rack for clamping the drum body. The hopper is used to introduce the coke sample into the drum body; Also including a counter, which is connected to the reduction motor. When the drum body rotates to the set number of turns, the counter issues a control signal to turn off the reduction motor; A control switch is provided on the cylinder to control the stroke of the cylinder; Also including a PLC control system. The high-temperature electric furnace, Type-I drum device, mechanical flat screen device, manipulator and gas supply system are respectively connected to the PLC control system. The PLC control system is used for controlling the test process.

2. The coke test system according to claim 1, wherein: The number of the opening and closing cover cylinder assemblies is two. The two opening and closing cover cylinder assemblies are symmetrically arranged on the slide rail. The opening and closing cover pressure plate is provided with a C-shaped bayonet structure for clamping with the drum cover, and the two opening and closing cover pressure plates realize the clamping of the drum cover; The drum cover and the drum body are provided with locking switches. The locking switch on the drum cover is used to lock the drum cover on the drum body. When the opening and closing cover pressing plate clamps the drum cover, the manipulator simultaneously presses the corresponding locking switch to release the locking of the drum cover, so that the opening and closing cover pressing plate can move upward through the cylinder to remove the drum cover. The locking switch on the drum body is used to lock the drum body on the solid frame. When the manipulator grasps the drum cover, the manipulator simultaneously presses the corresponding locking switch to release the locking of the drum body, so that the manipulator can carry the drum body.

3. The coke test system according to claim 1, characterized in that: The high-temperature electric furnace includes a furnace shell and a reactor. The reactor has a sealing cover, and the sealing cover is provided with a buckle. The furnace shell is provided with a cylinder mounting plate and a locking seat. The locking seat includes a fixed angle seat and a fastening clamping plate. The fixed angle seat is fixed on the furnace shell, and the fastening clamping plate is hinged to the fixed angle seat. The fixed angle seat is provided with a straight groove corresponding to the buckle, and the fastening clamping plate is provided with a J-shaped groove corresponding to the buckle. The straight groove is used to make way for the buckle, and the J-shaped groove is used to be clamped and positioned with the buckle. An opening and closing cylinder is arranged between the cylinder mounting plate and the fastening clamping plate. The opening and closing cylinder is used to drive the fastening clamping plate to rotate, so that the J-shaped groove on the fastening clamping plate is clamped and positioned with the buckle, or the clamping and positioning is released.

4. The coke test system according to claim 3, wherein: The reactor is a horizontal furnace. A coke container is arranged in the reactor, and an electric heating wire is wound around the outer wall of the reactor for heating the coke. One end of the reactor is axially inserted with a thermocouple for measuring the temperature in the electric furnace. One end of the reactor is axially provided with an air inlet pipe, and an air outlet pipe is vertically arranged at one end of the reactor. The end of the reactor where the air outlet pipe is arranged protrudes from the furnace shell. The air outlet pipe passes through the cylinder mounting plate. A heat preservation layer is arranged between the reactor and the furnace shell, and a heat insulation plate is installed on the furnace shell.

5. A method for using the coke test system according to claim 1, comprising the following steps: S1: The manipulator places the sieve plate of the required particle size on the mechanical flat sieve device, then pours the coke balls. The mechanical flat sieve device starts to work to screen the coke balls. Take the coke balls of the required particle size and put them into the dryer for drying. Weigh the required weight of the coke balls with a reduction scale and put them into the reactor. The weight is recorded as m. Connect the air inlet of the reactor to the gas supply system. S2: The high-temperature electric furnace is heated up at a heating rate of 8 °C / min 16 °C / min. When the temperature of the high-temperature electric furnace reaches 400 °C, nitrogen is introduced at a flow rate of 0.8 L / min to prevent coke burnout. When the temperature of the high-temperature electric furnace reaches 1100 °C, it is stabilized for 10 min, nitrogen is cut off, and carbon dioxide is introduced instead, with a flow rate of 5 L / min. The reaction lasts for 2 h, heating is stopped, carbon dioxide is cut off, and nitrogen is introduced instead, with a flow rate of 2 L / min until the temperature of the coke drops to room temperature, and then the nitrogen supply is stopped; S3: Take out the reacted coke, weigh it using a platform scale and record the data. Denote the weight as m1, and send the weighing result to the computer. The computer calculates the reactivity of the coke according to the formula , and calculates the reactivity of the coke; S4: Put the reacted coke into the type I drum device for a drum test. The motor driving the slider works to drive the opening and closing cover pressing plate to start moving from one end of the slide rail to directly above the drum cover. The cylinder descends to drive the opening and closing cover pressing plate to be clamped with the drum cover. The cylinder ascends, and the drum cover is extracted, so as to automatically open the drum cover. The manipulator starts to assist in the work, transports the drum body from the fixed frame to the hopper frame. Then the clamping cylinder starts to work. At this time, the drum body is fixed in the hopper frame. Pour the coke sample into the hopper, and the coke sample slides down along the inner wall of the hopper into the drum body. The clamping cylinder contracts to release the fixed state of the drum body. The manipulator starts to assist in the work, transports the drum body from the hopper frame to the solid frame for fixing. The opening and closing cover pressing plate puts down the drum cover to seal the drum body. The reduction motor operates to drive the drum body to rotate. When it rotates to the set number of turns, a control signal is sent by the counter to cut off the power supply of the reduction motor to stop it. The opening and closing cover pressing plate extracts the drum cover, and the motor driving the slider operates to drive the opening and closing cover pressing plate to move towards one end of the slide rail; The manipulator starts to assist in the work, removes the drum body, then dumps out the coke waste, and the manipulator then transports the drum body to the fixing rack. At this time, a movement cycle is completed; S5: The manipulator replaces the sieve plate of the mechanical flat sieve device with a sieve plate having a smaller sieve hole, then pours in coke waste, and the mechanical flat sieve device starts to work to screen out the waste residue. The weight of the residual coke waste on the sieve plate is weighed using a platform scale, denoted as m2, and the weighing result is sent to the computer. The computer calculates the post-reaction strength according to the formula , and calculates the post-reaction strength.

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