Transverse tank magnesium reduction furnace

Abstract

A reduction tank body is connected with vacuumizing equipment through a vacuum connecting pipe, a protruding part is arranged at the left end in the reduction tank body, a groove is formed in the protruding part, a corundum protection pipe is arranged in the reduction tank body, the corundum protection pipe is matched with the groove, and a heat conduction silicon carbide rod is arranged in the corundum protection pipe. The heat-conducting silicon carbide rod extends out of the reduction tank body and is connected with a power supply; a collecting channel is reserved above the inside of the reduction tank body, a crystallizer is arranged at the right end of the reduction tank body, a cooling water jacket is arranged outside the crystallizer, and the collecting channel is communicated with the crystallizer. Pelletizing materials in the reduction tank are heated through the heat conduction silicon carbide rod, the temperature rising speed of the electric heating heat conduction silicon carbide rod is controllable, heat dissipation loss is small, the temperature rising speed of the materials is high, the reduction period is short, and smoke pollution caused by fuel heating is reduced; heat is diffused outwards from the center of the reduction tank to directly heat pellet materials, the materials are heated evenly, and overflow of magnesium is facilitated.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of magnesium reduction furnace equipment, in particular to a horizontal tank magnesium reduction furnace for the production process of magnesium material. BACKGROUND

[0002] Metal magnesium reduction is the core process of hot magnesium smelting process, which is to add processed magnesium ore raw materials and specific reducing agent into the magnesium reduction tank in proportion, and to heat the magnesium reduction tank from the outside under vacuum conditions. The materials in the tank react with the reducing agent at high temperature, and the metal magnesium is overflowed to the cooling section of the magnesium reduction tank in the form of steam, and is condensed into ring-shaped metal magnesium crystals on the crystallizer to complete the reduction process.

[0003] The traditional horizontal tank magnesium reduction furnace places the reduction tank in the refractory material built magnesium reduction furnace, and the fuel combustion in the reduction tank cavity provides heat to heat the outer wall of the reduction tank, so as to indirectly heat the materials in the reduction tank to the reaction temperature to precipitate magnesium vapor. This form has large heat loss of flue gas and heat storage and heat dissipation of the furnace body itself, and low thermal efficiency. At the same time, the materials in the reduction tank are heated from the outer layer to the inner layer, and the heat conduction effect of the support part of the furnace body inside the reduction tank is poor, so that the overall heating of the materials in the reduction tank is uneven. The reduction tank is heated in the furnace body, which has large thermal erosion to the reduction tank body, and the service life of the reduction tank is short. SUMMARY

[0004] In view of the problems of uneven heating and short service life of the existing horizontal tank magnesium reduction furnace, the present application provides a horizontal tank magnesium reduction furnace, which directly heats the materials in the reduction tank from the inside to the outside, and the reduction tank is not in direct contact with the heating source, so as to avoid the erosion of the heat flow to the reduction tank body. The reduction tank body is connected with a vacuum extraction device through a vacuum connection pipe. A protruding part is arranged at the left end of the inside of the reduction tank body, and a groove is arranged on the protruding part. A corundum protection pipe is arranged in the reduction tank body, and the corundum protection pipe is matched with the groove. A heat-conducting silicon-carbon rod is arranged in the corundum protection pipe, and the heat-conducting silicon-carbon rod extends out of the reduction tank body and is connected with a power supply. A collection channel is left at the upper part of the inside of the reduction tank body. A crystallizer is arranged at the right end of the reduction tank body, and a cooling water jacket is arranged outside the crystallizer. The collection channel is communicated with the crystallizer.

[0005] A gas guide hole is arranged in the protruding part of the reduction tank body, and the gas guide hole is communicated with the collection channel.

[0006] The right end cover of the reduction tank body and the corundum protection pipe are sealed by a sealing ring.

[0007] Water inlet pipes and water outlet pipes are arranged on the cooling water jacket.

[0008] A heat preservation layer is arranged outside the reduction tank body, and the heat preservation layer is made of fiber products or light thermal insulation materials.

[0009] The beneficial effects of the present application are: 1. The horizontal tank magnesium reduction furnace heats the pellet material in the reduction tank through the heat-conducting silicon-carbon rod. The heating speed of the electrically heated heat-conducting silicon-carbon rod is controllable, the heat loss is small, the material heating speed is fast, the reduction cycle is short, the fuel heating flue gas pollution is reduced, and the heat-conducting silicon-carbon rod is located at the center position of the reduction tank. The heat is diffused from the center of the reduction tank to the outside to directly heat the pellet material. The material is evenly heated, which is beneficial to the overflow of magnesium and reduces the material-magnesium ratio. The reduction tank bottom is provided with a gas guide hole, which is convenient for collecting magnesium precipitated at the far end of the bottom of the reduction tank.

[0010] 2. The horizontal tank magnesium reduction furnace has simple structure. The magnesium reduction reaction condition can be realized through a single tank body. The furnace body structure is not needed to be constructed. The reduction furnace investment cost is greatly reduced. The construction period is short. The process layout is flexible. The furnace body insulation material is easy to replace. The reduction tank is far away from the heating center. The deformation and damage degree of the reduction tank under high temperature state is reduced. The automatic device is combined easily. The pellet material loading and reduction slag discharging automatic control are realized. BRIEF DESCRIPTION OF DRAWINGS

[0011] Fig. 1 is the horizontal tank magnesium reduction furnace cross-sectional view of the present application; Fig. 2 is the A-A cross-sectional view of the present application; Fig. 3 is the B-B cross-sectional view of the present application.

[0012] In the figure: 1, heat-conducting silicon-carbon rod; 2, pellet material; 3, reduction tank body; 4, insulation layer; 5, cooling water jacket; 6, crystallizer; 7, water inlet pipe; 8, water outlet pipe; 9, vacuum connection pipe; 10, corundum protection pipe; 11, sealing ring; 12, gas guide hole; 13, collection channel; 14, groove. DETAILED DESCRIPTION

[0013] The present application will be further described below in combination with the drawings of the specification. As shown in the drawings, Figs. 1-3 The horizontal tank magnesium reduction furnace of the present application, the reduction tank body 3 is connected with the vacuum extraction equipment through the vacuum connection pipe 9. The left end of the reduction tank body 3 is provided with a protruding part. The protruding part is provided with a groove 14. The protruding part is provided with a gas guide hole 12. The reduction tank body 3 is provided with a corundum protection pipe 10. The corundum protection pipe 10 is matched with the groove 14. The corundum protection pipe 10 is provided with a heat-conducting silicon-carbon rod 1. The heat-conducting silicon-carbon rod 1 extends out of the reduction tank body 3 and is connected with the power supply. The upper part of the inside of the reduction tank body 3 is left with a collection channel 13. The right end of the reduction tank body 3 is provided with a crystallizer 6. The outside of the crystallizer 6 is provided with a cooling water jacket 5. The cooling water jacket 5 is provided with a water inlet pipe 7 and a water outlet pipe 8. The collection channel 13 is communicated with the crystallizer 6. The protruding part gas guide hole 12 of the reduction tank body 3 is communicated with the collection channel 13.

[0014] The right end cover of the reduction tank body 3 is sealed with the sealing ring 11 and the corundum protection tube 10.

[0015] The reduction tank body 3 is externally provided with a heat preservation layer 4 made of fiber products or light heat insulation materials.

[0016] In use, before the reduction furnace works, the reduction tank body 3 is horizontally fixed on the external working area support, the corundum protection tube 10 is inserted into the groove 14 of the protruding part of the reduction tank and fixed, then the pellet material 2 is filled, the reduction tank body 3 can be inclined at a certain angle, which can ensure that the pellet material 2 can enter the reduction tank body 3 along the inner wall of the reduction tank and ensure a certain filling speed. After the material is filled, the reduction furnace is restored to the horizontal state, and a certain space is left at the top of the reduction tank, which is the collection channel 13, and the material filling horizontal area does not exceed the position of the right cooling water jacket.

[0017] Then the crystallizer 6 and the sealing ring 11 are installed in sequence to ensure the overall sealing effect of the reduction tank: the crystallizer 6 is placed at the right side of the reduction tank body and fixed, then the corundum protection tube 10 is fixed through the fastening nut and the sealing ring 11, and finally the heat-conducting silicon-carbon rod 1 is placed in the corundum protection tube 10, the whole assembly is completed, the external vacuum device draws vacuum through the vacuum connector 9 to make the tank reach the required vacuum degree and maintain the vacuum degree balance, and after the requirements are met, the power is turned on for heating, and the circulating cold water is injected into the cooling water jacket 5 through the water inlet pipe 7 and the water outlet pipe 8.

[0018] After the pellet material 2 in the tank reaches the reaction temperature by adjusting the voltage, the pellet material continuously undergoes chemical reduction reaction to generate high-temperature magnesium vapor, the magnesium vapor enters the collection channel 13 through the material gap and the gas guide hole 12 and then enters the crystallizer 6, and since the temperature in the cooling water jacket 5 area is relatively low, the magnesium vapor condenses into solid magnesium in the crystallizer 6 and adheres to the inner wall of the crystallizer, and after all the magnesium vapor is precipitated, the whole reaction process is completed.

[0019] After the reaction is completed, the power supply and the vacuum valve are cut off, the heat-conducting silicon-carbon rod 1, the corundum protection tube 2, the crystallizer 6 and the metal coarse magnesium adhered to the inner wall are taken out, and the reduction tank is inclined to remove the reduction slag. The next operation is performed in sequence and circulated.

[0020] Although the preferred embodiments of the present application have been described, those skilled in the art can make further changes and modifications to the embodiments after learning the basic creative concept; therefore, the claims should be interpreted as including the preferred embodiments and falling within the spirit and scope of the present application, and thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents.

Claims

1. A horizontal-tank magnesium reduction furnace, comprising a reduction tank body, characterized in that, The reduction tank body is connected to a vacuum pump via a vacuum connector. The left end of the inside of the reduction tank body has a protrusion with a groove. The reduction tank body contains a corundum protection tube that mates with the groove. A heat-conducting silicon carbide rod is installed inside the corundum protection tube and extends out of the reduction tank body to connect to the power supply. A collection channel is provided at the top inside the reduction tank body. A crystallizer is located at the right end of the reduction tank body. A cooling water jacket is provided outside the crystallizer, and the collection channel is connected to the crystallizer.

2. The horizontal-tank magnesium reduction furnace according to claim 1, characterized in that, The protruding part of the reduction tank body is provided with a gas guide hole, which is connected to the collection channel.

3. The horizontal-tank magnesium reduction furnace according to claim 1, characterized in that, The right end cap of the reduction vessel body is sealed to the corundum protective tube by a sealing ring.

4. A horizontal-tank magnesium reduction furnace according to claim 1, characterized in that, The cooling water jacket is equipped with an inlet pipe and an outlet pipe.

5. A horizontal-tank magnesium reduction furnace according to claim 1, characterized in that, The reduction tank body is provided with an insulation layer on the outside, which is made of fiber products or lightweight heat insulation materials.

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