Four-electrode direct-current electric smelting magnesium furnace and using method
A direct current, four-electrode technology, applied in the field of metallurgy and mining, can solve problems such as insufficient injection power density, unstable arc, large melting area, etc., to solve serious waste of resources and energy, suppress arc deviation, and expand melting power Effect
Inactive Publication Date: 2021-06-01
DALIAN UNIV OF TECH +1
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Problems solved by technology
[0007] The purpose of the present invention is to propose a four-electrode direct current electric melting magnesium furnace, aiming at the problems of insufficient injection power density, small molten pool, arc instability and furnace wall ablation caused by arc deviation in the current direct current electric melting magnesium smelting furnace. Compared with the existing DC electric smelting magnesium smelting furnace, the smelting power is doubled under the same smelting voltage, the injection power is high, and the melting area is large
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Embodiment 4
[0042] The working principle of the four-electrode DC electric fused magnesium furnace in this embodiment is as follows:
[0043] The current provided by the DC power supply 1 passes through the flexible short network 3, the electrode tilt control mechanism 5, the gripper 7, the graphite anode, the short-circuited carbon block or the molten pool is located in the furnace shell, and the graphite cathode returns to the DC power supply 1 for power supply to form a current In the loop, the smelted charge magnesite is filled in the space surrounded by the furnace shell.
[0044] The electric smelting magnesium smelting process is divided into three stages: starting furnace, melting and finishing stage:
[0045] The start-up stage: lay carbon blocks on the furnace shell and the bottom of the electrodes, adjust the four electrodes to the shortest distance equal to the radius of the graphite electrode through the electrode vertical lifting mechanism 2, the electrode horizontal movemen...
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The invention provides a four-electrode direct-current electric smelting magnesium furnace and a using method, and belongs to the technical field of metallurgy and mining industry. The four-electrode direct-current electric smelting magnesium furnace comprises a direct-current power supply, a flexible short net, an electrode vertical lifting mechanism, an electrode horizontal moving mechanism, an electrode inclination control mechanism, a graphite electrode, a holder and a furnace shell. The direct-current power supply is connected with the graphite electrode through the flexible short net, the electrode inclination control mechanism is connected with the upper end of the graphite electrode through the holder, and the lower end of the graphite electrode is arranged in the furnace shell; and the electrode inclination control mechanism can adjust the inclination angle of the graphite electrode. Compared with existing direct-current electric smelting magnesium smelting, the four-electrode direct-current electric smelting magnesium furnace has the advantages that the smelting power is doubled under the condition of the same smelting voltage, the injection power is high, the problems of small molten pool, arc deflection and the like of the direct-current electric smelting magnesium furnace can be solved, the yield of large-crystal electric smelting magnesium is increased, and industrial application of a direct-current power supply technology in the electric smelting magnesium industry is promoted.
Description
technical field [0001] The invention belongs to the technical field of metallurgy and mining, and relates to a four-electrode direct-current electric fused magnesium furnace and a use method thereof. Background technique [0002] Fused magnesia is made of magnesite as raw material and submerged arc smelted in an electric arc furnace to form a high temperature resistant material. Fused magnesia products are widely used in metallurgy, nuclear industry and other fields. [0003] At present, my country's fused magnesium industry is still using the AC electric arc furnace production method and submerged arc production process in the 1940s and 1950s. The AC arc crosses zero 100 times per second, and the arc is continuously extinguished and reignited, and the three-phase electrode arc current The interaction of the magnetic fields results in poor arc stability. Due to the unstable heat source of the three-phase AC furnace, in the process of smelting magnesite, the yield of magnesiu...
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IPC IPC(8): F27B14/20F27B14/06F27B14/08F27B14/14
CPCF27B14/06F27B14/08F27B14/14F27B14/20
Inventor 李国锋苏美璇王进君王志强王宁会倪忠伟王继奇
Owner DALIAN UNIV OF TECH