Catalyzer used in pidgeon's magnesium reduction process and the magnesium reduction process adopting the catalyzer

A technology of catalyst and reduction method, which is applied in the direction of physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc. It can solve the problems of long magnesium reduction time and low reduction efficiency, and achieve the improvement of reduction rate and reduction reaction speed The effect of increasing and increasing the activity

Active Publication Date: 2008-01-30
WUTAI YUNHAI MAGNESIUM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is the problem of long magnesium reduction time and low reduction efficiency, and provides a Pidgeon method magnesium reduction catalyst with short reduction time and high reduction efficiency and a magnesium reduction method using the catalyst

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Mix calcined white 100kg, ferrosilicon 19kg, catalyst 2.0kg (the molar ratio of magnesium fluoride, molybdenum oxide and calcium chloride is 1:0.1:0.5, mix uniformly, heat and melt in a graphite crucible, control the temperature at 850-950 ℃, pouring, cooling and crushing (less than 200 mesh) mixed, placed in a reduction tank for high-temperature vacuum reduction, the reduction time is 8 hours, and the reduction rate of magnesium in calcined white is 89%.

Embodiment 2

[0017] Calcined white 100kg, ferrosilicon 20kg, catalyst 3.5kg (the molar ratio of magnesium fluoride, molybdenum oxide, calcium chloride is 1: 0.3: 1.0, after uniform mixing, heat and melt in graphite crucible, control temperature at 900 ℃, pouring, cooling and crushing (less than 200 meshes) are mixed and pressed into agglomerates, placed in a reduction tank for high-temperature vacuum reduction, the reduction time is 7 hours, and the reduction rate of magnesium in calcined white is 90%.

Embodiment 3

[0019] Calcined white 100kg, ferrosilicon 21kg, catalyst 5.0kg (the molar ratio of magnesium fluoride, molybdenum oxide, calcium chloride is 1: 0.5: 1.5, after mixing uniformly, heat and melt in graphite crucible, control temperature at 950 ℃, pouring, cooling and crushing (less than 200 meshes) are mixed and pressed into agglomerates, placed in a reduction tank for high-temperature vacuum reduction, the reduction time is 6 hours, and the reduction rate of magnesium in calcined white is 91%.

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PUM

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Abstract

The invention relates to a pidgeon method magnesium deoxidization catalyst and the magnesium deoxidization method by adopting the catalyst. The catalyst consists of the magnesium fluoride, molybdenum oxide and calcium chloride which are matched according to the mol ratio of 1:( 0.01- 0.5) : ( 0.5- 1.5). The magnesium deoxidization method includes the steps that: 1) the preparation of the catalyst: after uniformly mixed according to the mol ratio, the magnesium fluoride, molybdenum oxide and calcium chloride are heated and melted under the temperature ranging from 850 DEG C to 950 DEG C and are poured, cooled and crushed, less than 200 grids; 2) the calcining-white, ferrosilicon and the catalyst are mixed according to the weight ratio of 100:(19- 21):(2- 5), pressed into bulks and arranged in a deoxidization tank for high-temperature vacuum deoxidization. The process conditions of the vacuum deoxidization are the same as the conditions of the pidgeon method. By adopting the invention, the deoxidization time can be shortened by 3 hours through 5 hours, and the deoxidization efficiency of the magnesium can be improved by 2 percent through 8 percent.

Description

technical field [0001] The invention belongs to a catalyst used in the metal magnesium reduction process, in particular to a Pidgeon method magnesium reduction catalyst and a magnesium reduction method using the catalyst. Background technique [0002] Magnesium reduction by Pidgeon method has become the main method for producing magnesium metal in my country. The process is to grind calcined dolomite (that is, calcined white) and ferrosilicon and fluorite powder into fine powder according to a certain ratio, press them into agglomerates, and put them in a reduction tank made of heat-resistant alloy. Magnesium vapor can be obtained by lower reduction, which can be condensed and crystallized into solid magnesium. Because it has the characteristics of short process, quick effect, high product quality, convenient raw materials, extensive energy sources, flexible production, and easy operation. However, the various technical and economic indicators of the above-mentioned Pidgeo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/12B01J27/132C22B26/22
Inventor 诸天柏陶卫建崔荣彬佟龙福
Owner WUTAI YUNHAI MAGNESIUM IND
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