Method for increasing heating speed of material in metal vacuum smelting reduction still and reduction still

Abstract

The invention discloses a method for improving material heating speed in a reduction kettle for vacuum metal smelting, which comprises the following steps of: arranging heat conductors (1) on the wall of a reduction kettle for vacuum metal smelting or on a radiation pipe (2) penetrating in the reduction kettle, thus increasing the contact area between the radiation pipe and a reduction material in the reduction kettle, reducing the heat conduction distance between the radiation pipe and the reduction material and improving the heating speed of the reduction material. By arranging the plurality of heat conductors on the kettle wall and on the radiation pipe connected with the reduction kettle, the invention can increase the contact heat conduction area between the radiation pipe and the reduction material in the reduction kettle for vacuum metal smelting, shorten the heat conduction distance from the reduction material and improve the heating speed of the reduction material, thus improving heat utilization rate, achieving energy saving effect, reducing reduction reaction time and improving the production capacity.

Description

technical field [0001] The invention relates to a heat conduction method of a reduction kettle, in particular to a method for increasing the heating speed of materials in a metal 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 ...

AI Technical Summary

Problems solved by technology

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 the temperature rises slowly. It takes a long time to reach the reaction temperature. The existing The time required for the reduction tank from feeding to the completion of the reduction reaction is generally between 8 and 12 hours, and the production capacity is limited. The reduction tank is used to heat the reduction material through the radiant tube. Due to the substantial increase in the amount of material charged, the heat transfer time is also longer

Images