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Magnesium smelting method capable of shortening reduction period

A technology of magnesium smelting and reduction furnace, applied in the field of silicon thermal magnesium smelting, can solve the problems of large temperature drop in furnace temperature and long recovery period, and achieve the effects of reducing production cost, shortening reduction period and improving magnesium smelting efficiency.

Active Publication Date: 2013-06-26
WUTAI YUNHAI MAGNESIUM IND
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AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the shortcoming that the furnace temperature drops greatly after the cold ball enters the reduction tank, resulting in a long recovery period, and to provide a magnesium smelting method that can shorten the reduction period

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  • Magnesium smelting method capable of shortening reduction period

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Embodiment Construction

[0012] A magnesium smelting method that can shorten the reduction period of the present invention includes dolomite calcination, ball milling, briquetting and reduction processes. Before the reduction, preheat the balls pressed by the briquettes, and the preheating temperature is 600 -780°C, preheating time 1.5-3 hours. If the preheating temperature is lower than 600°C or the preheating time is less than 1.5 hours, the pellets cannot be preheated well. If the preheating temperature is higher than 780°C or the heating time is longer than 3 hours, the ratio of ferrosilicon to magnesium is not good because of the oxidation tendency of ferrosilicon.

[0013] During preheating and reduction, six furnaces numbered 1-6 are arranged neatly in two rows, the first row is No. 1-3 furnaces, and the second row is No. 4-6 furnaces, of which No. 2 furnace is the preheating furnace , the remaining 5 furnaces are magnesium smelting reduction furnaces, 120 preheating tanks are installed in the ...

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Abstract

The invention relates to methods for smelting nonferrous metal and provides a magnesium smelting method capable of shortening a reduction period, aiming at solving the problem of long reduction period caused by the relatively-large temperature decreasing amplitude of a furnace after cold pellets enter a reduction pot. The method comprises the process steps of calcining dolomite, carrying out ballmilling, pelletizing and carrying out reduction, and the pellets formed by pelletizing are preheated prior to reduction, wherein the temperature for preheating is 600-780 DEG C and the time for preheating is 1.5-3 hours. Compared with the traditional method, the magnesium smelting method has the advantages that: the reduction period is shortened to 6-8 hours from 7-12 hours, the reduction period is obviously shortened, the efficiency for magnesium smelting can be increased, and the production cost is lowered.

Description

technical field [0001] The invention relates to a method for smelting nonferrous metals, in particular to a method for smelting magnesium by silicon thermal method. Background technique [0002] In recent years, with the rapid development of industry, the demand for metal magnesium at home and abroad has been increasing, and the domestic silicon thermal method of magnesium smelting is very popular. This magnesium smelting process is to crush the three furnace materials of ferrosilicon, dolomite and fluorite , Grind, mix according to a certain proportion of ingredients, then make pellets, place in a reduction tank for high-temperature reduction to generate magnesium vapor, the magnesium vapor is cooled and condensed to obtain crude magnesium, and finally refined into metal magnesium. The process is basically divided into four parts. First, dolomite is calcined. Dolomite (CaCO3·MgCO3) is heated and decomposed into calcined white (CaO·MgO). Ball milling process, put ferrosilic...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B26/22C22B5/04
Inventor 梅小明尚世显翟海涛
Owner WUTAI YUNHAI MAGNESIUM IND
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