Preparation method of ferrochrome and crucible applied to method

Abstract

The invention relates to a preparation method of ferrochrome and a crucible applied to the method. To achieve the purpose that ferrochrome is smelted through microwave heating and meanwhile solve thetechnical problem that the requirement for the crucible is relatively high in a method for smelting the ferrochrome through microwave heating, the preparation method comprises the following steps thatmaterials are prepared, furnace burden comprises ferrochrome mineral powder, a reducing agent and an auxiliary material, and the furnace burden comprises, by weight percent, 65%-70% of the ferrochrome mineral powder, 15%-20% of the reducing agent and 13%-18% of the auxiliary material; secondly, ball making is carried out, wherein the material powder of the furnace burden is mixed to be uniform according to the proportion, water is added, the furnace burden is pressed into balls, and the balls are dried; thirdly, the material balls are laid on the crucible, the thickness does not exceed 150 mm, and then the crucible is put into a microwave oven to be heated; and fourthly, the heated furnace burden is taken out and subjected to water cooling, jaw crushing and gravity separation, and ferrochrome particles are obtained. The Cr content of the high-carbon ferrochrome reduced through the method ranges from 55%-60%, the recovery rate of the Cr ranges from 85%-92%, the indexes are equivalent to the indexes of a traditional submerged arc furnace product, the power consumption and the dust pollution are reduced, and the furnace burden demolding problem of microwave metallurgy is economicallysolved.

Description

Technical field

[0001] The present invention relates to a process for producing high-carbon ferrochrome, in particular to a method for obtaining high-carbon ferrochrome by reducing chromite by microwave and a crucible used in the method. technical background

[0002] High-carbon ferrochrome alloys are mainly used as steelmaking additives to produce various special steels such as stainless steel, tool steel, spring steel, ball bearing steel, acid-resistant steel, heat-resistant steel, etc., to improve the high temperature resistance, oxidation resistance, corrosion resistance of steel Wear-resistant, high-strength performance. At present, ferrochromium alloys are mainly produced by submerged arc furnaces, which belong to industries with high energy consumption and high pollution. With the continuous upgrading of national environmental protection requirements and the increasingly strict carbon emission quota system, the submerged arc furnace smelting ferrochrome process will gradu...

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