Metallurgical furnace with slag outlet in bottom

Abstract

The invention relates to the fields of metal smelting and metal oxide melting, in particular to a metallurgical furnace with a slag outlet in the bottom. The metallurgical furnace comprises a furnace body, a molten metal outlet formed in the side wall of the furnace body, a lower electrode body arranged at the bottom of the furnace body, the slag outlet is formed in the lower electrode body, an upper electrode body arranged in the furnace body, and the upper electrode body and the lower electrode body are respectively connected with an electrode transformer. According to the metallurgical furnace with the slag outlet in the bottom, slag liquid is directly heated by electrifying the slag liquid through the upper electrode and the lower electrode, so that the purpose of improving the flowability of the slag liquid is achieved, the outflow temperature and flow of the slag liquid can be controlled constantly, and the purpose of online utilization is achieved.

Description

technical field [0001] The invention relates to the fields of metal smelting and metal oxide melting, in particular to a metallurgical furnace with a slag outlet at the bottom. Background technique [0002] The slag outlet of the traditional metal smelting furnace is set on the side wall of the furnace. In the traditional smelting process, there is no means or way to directly heat the slag outlet. Because the slag liquid has a very high melting point and poor fluidity, it needs to be pumped into the furnace. Add a large amount of auxiliary solvent materials (such as limestone, dolomite, fluorite, etc.) to lower the melting point of the slag liquid and improve the fluidity of the slag liquid, so as to ensure that the slag liquid can flow out through the furnace wall smoothly. [0003] From the perspective of the furnace structure, the upper part of the furnace bottom is usually a horizontal furnace bottom or a pot bottom-shaped concave furnace bottom with the same height. The...

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Problems solved by technology

[0004] Traditional metallurgical furnaces have the following problems: (1) Increased energy consumption, and the added auxiliary solvent materials require high energy consumption from room temperature to melting state; (2) Increased slag volume, resulting in a large amount of solid waste (3) To reduce metallurgical quality, the added auxiliary materials often contain impurities, which reduces the quality of metal smelting and usually requires refining;

[0005] In short, because the traditional metallurgical furnace needs to add a large amount of auxiliary solvent materials, it greatly increases the cost of smelting, reduces the quality of smelting, and causes waste to pollute the environment.

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