A nickel matte bottom blowing converting process and nickel matte bottom blowing converting furnace

Abstract

The invention discloses a nickel matte bottom blowing converting process and a nickel matte bottom blowing converting furnace. The nickel matte bottom-blowing converting process comprises the following steps: adding low-nickel matte and flux into the nickel matte bottom-blowing converting furnace; continuously blowing oxygen-containing gas into the melt in the matte bottom-blowing converting furnace; and discharging high-nickel matte and converting slag from the nickel matte bottom-blowing converting furnace respectively. According to the nickel matte bottom-blowing converting process and the nickel matte bottom-blowing converting furnace of the present invention, the continuous blowing of nickel matte can be realized, the flue gas produced is continuous, the amount is small and stable, the SO2 concentration is stable, the environment is good, and the efficiency is high. The production cost of high nickel matte and flue gas acid production is low.

Description

technical field [0001] The invention relates to the technical field of nonferrous metallurgy, in particular to a nickel matte bottom blowing converting process and a nickel matte bottom blowing converting furnace. Background technique [0002] The metallurgical method of extracting nickel from sulfide ore mainly adopts pyrometallurgy, and its technological process is mainly to smelt nickel sulfide concentrate in electric furnace, flash furnace or other smelting furnaces to obtain low-nickel matte, and low-nickel matte in blowing furnace High-nickel matte is obtained through blowing, and the high-nickel matte is further processed to obtain nickel products such as electro-nickel, nickel powder, nickel pellets, and associated cobalt, copper, platinum group metals and rare precious metals. At present, PS converter is mainly used for blowing nickel matte. Liquid low-nickel matte is periodically added to PS converter through crane and melt coating, and oxygen-containing gas is blo...

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Problems solved by technology

The blowing operation of PS converter can only be carried out intermittently. During the operation, the furnace body needs to be rotated and stopped several times to realize operations such as feeding, slag discharge, nickel matte discharge, and furnace mouth cleaning. The furnace body cannot be completely sealed, so the operation rate is low. The efficiency is low, the temperature of the melt in the furnace fluctuates greatly, the air leakage of the blowing flue gas is large and unstable, and the flue gas contains SO 2 The concentration is low, and the cost of flue gas treatment is high; the service life of PS converter is short, the maintenance cost is high, and the cost of blowing is high; the flue gas with low concentration of sulfur dioxide escapes into the workshop during the process of melt transfer and nickel matte blowing, and the low air pollution is serious; There are still major safety hazards in the process of unlucky body

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