Method for eliminating local partial pressure in vacuum smelting reduction still and used reduction still

Abstract

The invention discloses a method for eliminating local differential pressure in a vacuum smelting reduction kettle, which comprises the following steps of: arranging a metal vapor vacuum pumping hole or a crystallizer interface on the reduction kettle; and disposing a metal vapor guide channel in the reduction kettle, so that the metal vapor can escape into a metal collector or the crystallizer along the guide channel. The reduction kettle (4) adopted by the method has a rectangular or round box body with a bevel bottom structure and has a bottom inclined by an angle of 30 to 60 DEG. The metal vapor vacuum pumping hole (6) is provided on the kettle body on the highest point side on the top of the reduction kettle, an air guide groove (2) pointing to the metal vapor vacuum pumping hole is provided on the inner wall of the reduction kettle, a radiation pipe (1) with the air guide groove and penetrating in the kettle is vertically or horizontally arranged in the reduction kettle, or an air guide groove is provided on a heat conductor arranged on the radiation pipe. The invention can effectively eliminate local differential pressure in the vacuum smelting reduction kettle to successfully guide the metal vapor produced by reduction reaction, thus holding the pressure environment in the reduction kettle and ensuring the smooth execution of the reduction reaction.

Description

technical field [0001] The invention relates to a reduction kettle, in particular to a method for eliminating partial pressure in a vacuum smelting reduction kettle and the used reduction kettle. Background technique [0002] In the production of metal vacuum smelting, the reduced material produced through the batching and pressing process is sent to the reduction tank for reduction reaction. Generally, the reduction reaction temperature is required to be higher than 1100 °C and the pressure is lower than 10Pa~13Pa. The reduction reaction is realized by heating the reduction tank in the reduction furnace with fuel or heating the radiant tube of the reduction tank so that the reduced material reaches the required temperature value. The existing reduction tank has a tubular hollow structure, which is placed in the reduction furnace to heat the reduced material. The heat is transferred from the outside of the reduction tank to the material. The thermal conductivity is low and t...

AI Technical Summary

Problems solved by technology

Due to the large capacity of the reduction kettle itself, a large amount of metal vapor is produced. The material at the bottom is under the weight of a large amount of material at the top, and the metal vapor generated is difficult to be sucked out, forming a partial partial pressure at the bottom, which destroys the reduction reaction. The pressure environment hinders the progress of the reduction reaction

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