Metal magnesium carbon thermal reduction process and device

Abstract

The invention discloses a metal magnesium carbon thermal reduction process and device. The process comprises the following steps that a magnesium-containing raw material, a carbon-containing reducingagent and a catalyst are used as raw materials, the raw materials are subjected to uniform mixing and forming, under certain temperature and vacuum degree conditions, current is directly conducted atthe two ends of a formed sample, and the current is controlled to carry out power-on reduction reaction, and the cooling is carried out to obtain the metal magnesium after the reaction is finished. The device comprises a reactor, a positive electrode, a negative electrode, a position buffer and a sealing cover, wherein the reactor is used for performing a metal magnesium reduction reaction, the positive electrode and the negative electrode are used for directly applying current to the reaction raw material formed parts, the position buffer is used for regulating the positive and negative electrodes, and the sealing cover is used for sealing the reactor. The process and device overcome the series of problems such as high reduction temperature, long reduction time, reversible reaction and the like of an existing carbon thermal method metal magnesium, the temperature of the reduction device can be greatly reduced, the metal magnesium can be initially reduced at room temperature, the reduction speed of the metal magnesium is greatly improved, and the process is green and environmentally friendly.

Description

technical field [0001] The invention belongs to the field of metallurgical industry, and in particular relates to a metal magnesium carbothermal reduction process and device. Background technique [0002] Metal magnesium and its alloys are currently the lightest metal structural materials, which have good mechanical and physical properties, and have gradually become popular metal materials widely used. At present, the production process of magnesium smelting is mainly based on electrolysis method and silicothermal method. The carbothermal reduction magnesium smelting process has the characteristics of short production process, low energy consumption, low cost, high production efficiency and low pollution compared with the widely used process at present. With the global attention and attention to the efficient utilization of resources and environmental ecological protection, the smelting of magnesium by carbothermal reduction has very important practical significance. [00...

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Problems solved by technology

[0004] Although the carbothermal reduction process began to be applied during the Second World War, the reaction temperature was high, and the problem of high-temperature resistant materials for reduction heating and vacuum sealing devices was not easy to solve. The heating process consumes a lot of energy and cannot meet the requirements of modern clean production.

There have been research reports on the use of microwave heating, but a series of technologies such as feeding microwaves into vacuum devices, microwave energy conversion efficiency, microwave thermal runaway, and the depth of microwave penetration into materials need to be solved. There is also the problem of high heating costs, and the use of Joule heat The electric heating carbothermal reduction process also has problems such as high power consumption, easily damaged electrodes, and high production costs.

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