An electric furnace device for coke reactivity test and its working method

Abstract

The present invention discloses an electric furnace device for coke reactivity testing and an operating method thereof, which can realize automatic operation of loading and unloading the electric furnace. The device comprises a furnace shell and a reactor, wherein the reactor has a sealing cover provided with a buckle. The furnace shell is provided with a cylinder mounting plate and a locking seat, wherein the locking seat comprises a fixed angle seat and a buckling clamp. The fixed angle seat is fixed to the furnace shell, and the buckling clamp is hinged to the fixed angle seat. The fixed angle seat has a straight groove corresponding to the buckle, and the buckling clamp has 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 engage with the buckle for positioning. An opening and closing cylinder is provided between the cylinder mounting plate and the buckling clamp, and the opening and closing cylinder is used to drive the buckling clamp to rotate, so that the J-shaped groove on the buckle clamp engages with the buckle for positioning, or releases the engagement.

Description

Technical Field

[0001] The present invention relates to the technical field of coke reactivity testing, in particular to an electric furnace device for coke reactivity testing and a working method thereof. Background Art

[0002] Coke is primarily used in blast furnace ironmaking and blast furnace smelting of non-ferrous metals such as copper, lead, zinc, titanium, antimony, and mercury, serving as a reducing agent, exothermic agent, and a skeletal material. The use of coke in ironmaking blast furnaces, replacing charcoal, laid the foundation for the large-scale construction of modern blast furnaces and marked a major milestone in metallurgical history. To achieve optimal technical and economic performance in blast furnace operation, smelting coke (metallurgical coke) must possess appropriate chemical and physical properties, including thermal properties during the smelting process. In addition to its extensive use in ironmaking and non-ferrous metal smelting (metallurgical coke), coke is also used in casting, chemical industry, calcium carbide, and ferroalloys, with varying quality requirements. For example, casting coke generally requires large particle size, low porosity, high fixed carbon content, and low sulfur content. Coke used in chemical gasification does not require stringent strength requirements, but requires good reactivity and a high ash melting point. Coke used in calcium carbide production requires a high fixed carbon content.

[0003] Coke plays a crucial role in the blast furnace production process and plays a decisive role in various blast furnace economic indicators. Therefore, current blast furnace coke requirements are quite high. Coke's thermal reactivity directly affects its calorific value. Coke with insufficient calorific value will increase the fuel and coke ratios in ironmaking, affecting the thermal regime and thus increasing costs. Coke with insufficient strength is brittle and produces dust inside the furnace, which affects the air permeability and thus the smooth operation of the blast furnace. Coke has no effect on the furnace body. However, it does affect the quality of the iron. Good coke can more fully reduce iron from oxides and provide sufficient heat. Coke's reactivity and post-reaction strength are important indicators of coke quality, so reducing experimental errors is crucial. Electric furnaces used for coke testing generally lack automatic loading and unloading functions, which consumes a lot of manpower and time. Therefore, the design of an electric furnace device that can automatically load and unload the furnace is necessary. Summary of the Invention

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art and provide an electric furnace device for coke reactivity test and a working method thereof, which can realize automatic operation of charging and unloading the electric furnace.

[0005] The object of the present invention is achieved like this:

[0006] An electric furnace device for coke reactivity testing includes a furnace shell and a reactor. The reactor has a sealing cover, 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 buckle clamp, the fixed angle seat is fixed to the furnace shell, the buckle clamp is hinged to the fixed angle seat, the fixed angle seat is provided with a straight groove corresponding to the buckle, the buckle clamp 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 engage with the buckle for positioning, an opening and closing cylinder is provided between the cylinder mounting plate and the buckle clamp, the opening and closing cylinder is used to drive the buckle clamp to rotate, so that the J-shaped groove on the buckle clamp is engaged with the buckle for positioning, or releases the engagement and positioning.

[0007] Preferably, the reactor is a horizontal furnace, a coke container is provided in the reactor, the outer wall of the reactor is wrapped with a heating wire, the heating wire is used to heat the coke; a thermocouple is inserted axially at one end of the reactor, the thermocouple is used to measure the temperature in the electric furnace, an air inlet pipe is axially provided at one end of the reactor, an air outlet pipe is vertically provided at one end of the reactor, the air outlet pipe passes through the cylinder mounting plate, an insulation layer is provided between the reactor and the furnace shell, and an insulation plate is installed on the furnace shell.

[0008] Preferably, a robot is also included, which is used to open and close the sealing cover, and put in and take out the coke container.

[0009] Preferably, the buckle is a Z-shaped rod, one end of the buckle is welded and fixed to the sealing cover, and the other end of the buckle is used to cooperate with the locking seat.

[0010] Preferably, the cylinder mounting plate is located above the sealing cover, and there are two locking seats, which are symmetrically arranged on both sides of the sealing cover.

[0011] Preferably, the stroke of the opening and closing cylinder is controlled by a solenoid valve.

[0012] A method for operating an electric furnace device for coke reactivity testing,

[0013] The opening and closing cylinder contracts, driving the free end of the fastening plate to move upward, thereby releasing the fastening position of the buckle;

[0014] The manipulator opens the sealing cover, then places the coke container filled with coke samples into the furnace, and then closes the sealing cover. The opening and closing cylinder extends, driving the free end of the fastening plate to descend, and the J-shaped groove on the fastening plate engages with the buckle to lock the sealing cover.

[0015] The electric furnace is heated at a rate of 8°C / min to 16°C / min. When the temperature reaches 100°C, nitrogen is introduced at a flow rate of 0.8L / min. When the bed temperature reaches 1100°C, it is stabilized for 10 minutes, the nitrogen is cut off, and carbon dioxide is introduced at a flow rate of 5L / min. The reaction is continued for 2 hours. The heating is stopped, the carbon dioxide is cut off, and nitrogen is introduced at a flow rate of 2L / min. When the coke temperature drops to room temperature, the nitrogen is stopped.

[0016] The opening and closing cylinder 5 contracts, driving the free end of the fastening clamp plate to move upward, thereby releasing the fastening position of the clamp;

[0017] The robot opens the sealing cover, takes out the coke container, and then closes the sealing cover. The opening and closing cylinder extends, driving the free end of the fastening card to descend. The J-shaped groove on the fastening card is engaged with the buckle to position the sealing cover, completing a movement cycle.

[0018] Due to the adoption of the above technical solution, this solution has the characteristics of reasonable structure, convenient operation, safety and reliability, high efficiency, high degree of automation, and easy use and maintenance. The present invention has the following beneficial effects:

[0019] 1. The present invention realizes automatic opening and installation of the sealing cover by cooperating with the opening and closing cylinder, the locking seat and the manipulator, replacing the traditional manual labor, simplifying the process and reducing labor intensity.

[0020] 2. The robot places the reactor filled with coke samples into the electric furnace, and then takes the reactor out of the electric furnace after the reaction, which simplifies the procedure, improves efficiency and ensures the safety of personnel operation.

[0021] 3. Since the cylinder is connected to the solenoid valve, it is easy to operate and has a high degree of automation. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic structural diagram of an electric furnace device provided in an embodiment of the present invention;

[0023] Including: 1. Furnace shell; 5. Opening and closing cylinder; 6. Sealing cover; 7. Exhaust pipe; 10. Locking seat; 13. Buckle;

[0024] Figure 2 A side view of an electric furnace device provided in an embodiment of the present invention;

[0025] Among them: 4, air inlet; 15, thermocouple

[0026] Figure 3 A schematic diagram of the internal structure of an electric furnace device provided in an embodiment of the present invention;

[0027] Wherein: 2. Reactor; 3. Heating wire; 8. Insulation layer; 9. Heat insulation board; 14. Handle;

[0028] Figure 4 A schematic diagram of the locking seat structure provided by an embodiment of the present invention;

[0029] Among them: 11, fixed angle seat; 12, fastening the clamping plate. DETAILED DESCRIPTION

[0030] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described below with reference to the accompanying drawings and examples. The exemplary embodiments of the present invention and their description are only used to receive the present invention and are not intended to limit the present invention.

[0031] like Figures 1-4 As shown, an electric furnace device for coke reactivity test includes a furnace shell 1, a reactor 2, a heating wire 3, an opening and closing cylinder 5, a sealing cover 6, an insulation layer 8, an insulation board 9, a locking seat 10, and a solenoid valve (not shown).

[0032] The reactor 2 is a lightweight, high-aluminum outer tube with a heating wire 3 wrapped around its outer wall, connected to a conductor for heating the coke. The reactor 2 has an air inlet pipe 4, an air outlet pipe 7, a thermocouple 15, and a coke container with a handle 14. The air inlet pipe 4 is located at one end of the reactor 2, and the air outlet pipe 7 is located at the end of the reactor 2 near the end cap and passes through the cylinder mounting plate.

[0033] A layer of lightweight aluminum brick insulation is provided between the outside of the reactor 2 and the furnace shell 1 to prevent large amounts of heat loss and maintain a stable temperature inside the furnace. The experimental electric furnace is a horizontal furnace that provides a heat source for the reactor 2, and a heat insulation board 9 is installed on the outside of the shell.

[0034] There are two locking seats 10, symmetrically arranged on either side of the reactor 2 outlet. The locking seats 10 include a fixed angle seat 11 and a fastening plate 12. The locking seats 10 are used to engage with the bayonet on the sealing cover 6, and the two locking seats 10 secure the sealing cover 6.

[0035] The opening and closing cylinder 5 is arranged below the cylinder mounting plate. 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 card plate 12, so that the free end of the fastening card plate 12 can move upward through the opening and closing cylinder 5. When the fastening card plate 12 moves upward, the buckle 13 on the sealing cover 6 can be removed from the locking seat 10, thereby releasing the lock on the sealing cover 6.

[0036] The system also includes a robotic arm for removing the sealing cover 6 (with a handle), placing the coke container containing the coke sample into the furnace, and removing the coke container from the furnace after the reaction. The opening and closing cylinder 5 is equipped with a solenoid valve that controls the cylinder's stroke, thereby driving the vertical movement of the clamping plate 12. The thermocouple 15 is used to measure the temperature within the furnace, thereby achieving automatic temperature control.

[0037] A method for operating an electric furnace device for coke reactivity testing,

[0038] The electromagnetic valve drives the opening and closing cylinder 5 to start working, and the opening and closing cylinder 5 moves upward, driving the fastening clamping plate 12 to move upward for a distance, so that the buckle 13 on the sealing cover 6 can move freely.

[0039] The manipulator starts the auxiliary work, removes the sealing cover 6 from the outlet, and then places the coke container filled with coke samples into the reactor 2. Make sure that the coke layer is in the middle of the constant temperature zone of the electric furnace. At this time, insert the thermocouple 15 into the sleeve and place it in the center of the material layer to fix the coke container. The manipulator starts the auxiliary work, and puts the sealing cover 6 back to the outlet. The buckle 13 on the sealing cover 6 is just engaged with the fixed angle seat 11 on the locking seat 10. The solenoid valve receives the signal, and the opening and closing cylinder 5 starts to work, driving the buckling card 12 to descend to the locking seat 10. The sealing cover 6 is locked in the locking seat 10, and the sealing cover 6 is firmly fixed. Connect the air inlet of the reactor 2 to the gas supply system, check the air path, and ensure that the system is airtight.

[0040] Heat the furnace at a rate of 8°C / min to 16°C / min. When the bed temperature reaches 100°C, introduce nitrogen at a rate of 0.8 L / min. When the bed temperature reaches 1100°C, stabilize for 10 minutes, then shut off the nitrogen and introduce carbon dioxide at a rate of 5 L / min. Allow the reaction to continue for 2 hours, then stop heating, shut off the carbon dioxide, and introduce nitrogen at a rate of 2 L / min until the coke temperature drops to room temperature, at which point the nitrogen flow is stopped.

[0041] The electromagnetic valve drives the opening and closing cylinder 5 to start working. The opening and closing cylinder 5 moves upward, driving the fastening card plate 12 to move upward for a distance, so that the buckle 13 on the sealing cover 6 can move freely. The manipulator starts to assist in the work, removing the sealing cover 6 from the outlet, taking out the coke container from the furnace, and then putting the sealing cover 6 back to the outlet. The buckle 13 on the sealing cover 6 just engages with the fixed angle seat 11 on the locking seat 10. The electromagnetic valve receives the signal, and the opening and closing cylinder 5 starts working, driving the fastening card plate 12 to descend to its original position. The sealing cover 6 is locked in the locking seat 10 and is firmly fixed. At this time, one movement cycle has been completed.

[0042] There are two locking seats 10, symmetrically arranged on either side of the reactor 2 outlet. The locking seats 10 include a fixed angle seat 11 and a fastening plate 12. The locking seats 10 are used to engage with the bayonet on the sealing cover 6, and the two locking seats 10 secure the sealing cover 6.

[0043] The opening and closing cylinder 5 is arranged below the cylinder mounting plate. The two opening and closing cylinders 5 are symmetrically arranged on both sides of the outlet of the reactor 2 and are connected to the fastening card plate 12 so that the fastening card plate 12 can be moved upward by the opening and closing cylinder 5. When the fastening card plate 12 moves upward, the buckle 13 on the sealing cover 6 can be removed from the locking seat 10, thereby releasing the lock on the sealing cover 6.

[0044] In the embodiment, the robot is used to remove and replace the sealing cover 6 to realize automated operation, put the coke container into the furnace and then take it out, replacing the traditional manual operation, eliminating the disadvantages of traditional manual operation, reducing labor intensity, greatly improving the efficiency and practicality of the electric furnace, and achieving the effect of saving time and effort to a certain extent, and playing a good role in protecting the health of the operators and on-site safety.

[0045] 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 limiting. 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 method for operating an electric furnace device for coke reactivity testing, characterized in that: An electric furnace device for coke reactivity test comprises a furnace shell and a reactor, wherein the reactor has a sealing cover, characterized in that: a buckle is provided on the sealing cover, a cylinder mounting plate and a locking seat are provided on the furnace shell, the locking seat comprises a fixed angle seat and a buckling clamping plate, the fixed angle seat is fixed to the furnace shell, the buckling clamping plate is hinged to the fixed angle seat, a straight groove is provided on the fixed angle seat corresponding to the buckle, a J-shaped groove is provided on the buckling clamping plate corresponding to the buckle, the straight groove is used to make way for the buckle, and the J-shaped groove is used to engage with the buckle for positioning, an opening and closing cylinder is provided between the cylinder mounting plate and the buckling clamping plate, the opening and closing cylinder is used to drive the buckling clamping plate to rotate, so that the J-shaped groove on the buckling clamping plate is engaged with the buckle for positioning, or releases the engagement and positioning; The reactor is a horizontal furnace, with a coke container inside. The outer wall of the reactor is wrapped with a heating wire for heating the coke. A thermocouple is inserted axially at one end of the reactor, and the thermocouple is used to measure the temperature inside the furnace. An air inlet pipe is axially provided at one end of the reactor, and an air outlet pipe is vertically provided at one end of the reactor. The end of the reactor where the air outlet pipe is provided protrudes from the furnace shell, and the air outlet pipe passes through a cylinder mounting plate. An insulation layer is provided between the reactor and the furnace shell, and a heat insulation board is installed on the furnace shell. It also includes a manipulator, which is used to open and close the sealing cover, and put in and take out the coke container; The buckle is a Z-shaped rod, one end of which is welded and fixed to the sealing cover, and the other end of which is used to cooperate with the locking seat; The cylinder mounting plate is located above the sealing cover, and there are two locking seats, which are symmetrically arranged on both sides of the sealing cover; The working method comprises: The opening and closing cylinder contracts, driving the free end of the fastening plate to move upward, thereby releasing the fastening position of the buckle; The manipulator opens the sealing cover, then places the coke container filled with coke samples into the furnace, and then closes the sealing cover. The opening and closing cylinder extends, driving the free end of the fastening plate to descend, and the J-shaped groove on the fastening plate engages with the buckle to lock the sealing cover. The electric furnace is heated at a rate of 8°C / min to 16°C / min. When the temperature reaches 100°C, nitrogen is introduced at a flow rate of 0.8L / min. When the temperature reaches 1100°C, it is stabilized for 10 minutes, the nitrogen is cut off, and carbon dioxide is introduced at a flow rate of 5L / min. The reaction is continued for 2 hours. The heating is stopped, the carbon dioxide is cut off, and nitrogen is introduced at a flow rate of 2L / min. The coke temperature is reduced to room temperature, and the nitrogen is stopped. The opening and closing cylinder contracts, driving the free end of the fastening plate to move upward, thereby releasing the fastening position of the buckle; The robot opens the sealing cover, takes out the coke container, and then closes the sealing cover. The opening and closing cylinder extends, driving the free end of the fastening card to descend. The J-shaped groove on the fastening card is engaged with the buckle to position the sealing cover, completing a movement cycle.

2. The method for operating an electric furnace device for coke reactivity testing according to claim 1, characterized in that: The stroke of the opening and closing cylinder is controlled by a solenoid valve.

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