Method for smelting magnesium through vacuum thermal reduction of precast pellets

A technology of prefabricated pellets and vacuum heat, applied in the field of metallurgy, can solve the problems that powder and fine materials cannot be produced by smelting magnesium, high-activity segment white is easy to absorb water, storage and transportation costs are high, and it can improve the utilization rate of magnesium resources and system performance. Low consumption, the effect of reducing energy consumption
CN102965524AActive Publication Date: 2013-03-13LIAONING DONGYU MAGNESIUM RES TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
LIAONING DONGYU MAGNESIUM RES TECH CO LTD
Publication Date
2013-03-13
Patent Text Reader

Abstract

The invention belongs to the field of metallurgy, and in particular relates to a method for smelting magnesium through vacuum thermal reduction of precast pellets. The method comprises the steps of: uniformly mixing dolomite, a reducing agent and fluorite by mass, and then adding a binding agent; preparing raw pellets with diameters of 5-20mm by using a disk pelleting machine; calcining the raw pellets under a nitrogen or argon protection atmosphere to obtain calcined cured pellets; and carrying out vacuum thermal reduction for 0.5-2 hours on the calcined cured pellets at a temperature of 1150 DEG C under the vacuum degree of 10 Pa to obtain the magnesium. The method has the advantages of high raw material utilization rate, high reduction rate, short reduction period, low energy consumption and the like; and compared with the traditional ferrosilicon process for smelting the magnesium, the method realizes the technical upgrading of the ferrosilicon process for smelting.
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Description

technical field

[0001] The invention belongs to the field of metallurgy, and in particular relates to a method for smelting magnesium by vacuum thermal reduction of prefabricated pellets. Background technique

[0002] The production methods of metal magnesium mainly include molten salt electrolysis method using magnesium chloride as raw material and vacuum thermal reduction method using magnesium oxide as raw material. Molten salt electrolysis method is to pass direct current into molten electrolyte containing magnesium chloride and decompose magnesium chloride The method of metal magnesium; the vacuum thermal reduction method is to use metal as a reducing agent under high temperature and vacuum conditions to reduce magnesium oxide to prepare metal magnesium. Due to the abundant dolomite resources in China, the main development of vacuum silicon thermal magnesium smelting, the process includes the following key steps: first, calcining dolomite at high temperature to obtain h...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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