A method for promoting directional crystallization of smelted magnesium oxide

Abstract

The invention provides a method for accelerating directional crystallization of smelted magnesium oxide. The method comprises the following steps: (1) before loading, closing a ventilation opening of a backing material section furnace body, and paving magnesite ores in the backing material section furnace body; (2) in an initial material smelting period, embedding an auxiliary section furnace body into a smelting section furnace body to reduce the total height of a subsection smelting furnace body; (3) when a material smelting position is close to the top of the smelting section furnace body, lifting the auxiliary section furnace body by an auxiliary section furnace body lifting mechanism, wherein the auxiliary section furnace body extends out from the smelting section furnace body so as to improve the total height of the subsection smelting furnace body, lifting a furnace cover and the auxiliary section furnace body simultaneously and further enhancing an electrode simultaneously; and (4) after smelting, introducing cooling water into a cooling interlayer, opening the ventilation opening after smelting for a period of time and taking out part of non-smelted materials close to the ventilation opening. The method for accelerating directional crystallization of smelted magnesium oxide can be used for achieving partial forced cooling, so that a great temperature gradient is formed in the smelted liquor, thereby achieving directional crystallization of a melt.

Description

technical field [0001] The invention relates to magnesite smelting technology, in particular to a segmented smelting furnace body and a method for magnesite smelting electric fused magnesite. Background technique [0002] Magnesite is one of the abundant resource minerals in my country. Fused magnesite smelted from magnesite is a high-grade refractory material, which has the advantages of high refractory temperature and high bulk density, and is the main raw material for preparing high-quality magnesia-carbon bricks. [0003] my country is a big producer of fused magnesia refractories, but it is far from being a strong producer. The main reason is the extreme backwardness of production equipment. The traditional production of fused magnesia adopts a simple electric arc furnace, and the furnace body is a one-piece cylindrical structure that is simply welded by ordinary steel plates. [0004] The design of the electric arc furnace body with this structure is unreasonable an...

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to propose a method for promoting the directional crystallization of magnesia smelting, which is simple and easy to implement, and can realize partly intensified cooling and make the magnesia crystal form A large temperature gradient is formed in the melt to realize directional crystallization of the melt

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