Chlorination process for pressing magnesite into balls through light burning dry method

A technology of magnesite and light burning, which is applied in the field of magnesite chlorination to produce molten magnesium chloride, which can solve the problems of low productivity of chlorination furnace and low utilization rate of chlorine gas, so as to improve the utilization rate of chlorine gas, high activity, and increase production capacity Effect

Inactive Publication Date: 2012-07-04
GUIYANG AL-MG DESIGN & RES INST
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  • Abstract
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  • Claims
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Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a chlorination process of magnesite lightly burned and pressed into pellets to overcome the shortcomings of the prior art such as the low production capacity of the chlorination furnace and the low utilization rate of chlorine gas.

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  • Chlorination process for pressing magnesite into balls through light burning dry method
  • Chlorination process for pressing magnesite into balls through light burning dry method

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Embodiment Construction

[0015] Embodiment of the present invention: magnesite is mixed with carbonaceous reducing agent and dried NaCl additive after light burning, then ground into mixed powder, pressed into agglomerate by ball press, and this agglomerate is sent into chlorine The melting furnace reacts with chlorine gas at 800-1000°C to produce magnesium chloride melt.

[0016] In the above-mentioned process, the magnesite can also be ground into powder firstly, then lightly burned, then mixed evenly with powdery carbonaceous reducing agent and dried NaCl additive to make mixed powder.

[0017] During the production process, the moisture content of the agglomerates pressed by the briquetting machine is very small, and its total moisture content does not exceed 2%.

[0018] The carbonaceous reducing agent and the dried NaCl additive are added in the following ratio (mass ratio):

[0019] C / MgO=0.2~0.3

[0020] NaCl / (MgO+C)=0.02~0.05.

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Abstract

The invention discloses a process method for pressing magnesite into balls through a light burning dry method to carry out chlorination production of anhydrous magnesium chloride melt. According to the method, the magnesite is subjected to light burning through a furnace kiln; a carbonaceous reducing agent and a dried industrial salt additive are added according to a certain ratio; a mill is adopted to grind into a mixed powder material; the mixed powder material is directly pressed into a briquette through a ball pressing machine; the briquette is conveyed to a chlorination furnace, and reacts with the introduced chlorine gas at a high temperature of 800-1000 DEG C to produce the magnesium chloride melt. Compared to the prior art, the process of the present invention has the following advantages that: the productivity of the chlorination furnace can be improved, the chlorine gas utilization rate can be improved, and the electricity consumption of the chlorination furnace can be reduced.

Description

technical field [0001] The invention relates to a process for preparing molten magnesium chloride by chlorination with magnesite as a raw material, and then electrolysis to obtain metallic magnesium, in particular to a method for obtaining molten magnesium chloride by chlorination of magnesite. Background technique [0002] Now use magnesite as raw material to obtain anhydrous magnesium chloride melt for electrolysis through chlorination, and there are mainly three kinds of processes: [0003] The first is the chlorination process of magnesite dry mass, which is to crush and grind magnesite and petroleum coke as a reducing agent separately, and then mix according to a certain proportion, and add an appropriate amount of asphalt as a binder. After stirring and kneading, it is pressed into agglomerates and sent to a chlorination furnace for chlorination to obtain anhydrous magnesium chloride melt. Its characteristic is that the agglomerate is prone to collapse and softening i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/08C25C3/04
Inventor 申明亮
Owner GUIYANG AL-MG DESIGN & RES INST
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