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 blow oxygen-containing gas into the melt in the matte bottom-blowing converting furnace; when the iron content of the nickel matte in the nickel matte bottom-blowing converting furnace reaches the first predetermined value, discharge the blowing slag; Continuously blowing oxygen-containing gas into the melt in the matte bottom blowing converting furnace and no longer adding low nickel matte; and when the nickel matte iron content in the nickel matte bottom blowing converting furnace reaches the second predetermined value, The high-nickel matte is discharged from the nickel matte bottom-blown converting furnace. 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...

AI Technical Summary

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. Low efficiency, large melt temperature fluctuations in the furnace body, large and unstable blowing flue gas leakage, low SO2 concentration in flue gas, and high flue gas treatment costs; PS converter has short service life, high maintenance costs, and high blowing costs; Low-concentration sulfur dioxide flue gas escapes into the workshop during melt transfer and nickel matte blowing process, causing serious air pollution; there are also major safety hazards in the melt transfer process

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