An oxygen-enriched side-blowing furnace smelting method for secondary resources containing arsenic and iron containing rare elements and chlorinating agent

Abstract

The invention relates to an oxygen-enriched side-blown furnace smelting method for a secondary resource with arsenic and dispersed elements by adding ion and chlorinating agent respectively. The method comprises the following steps: adding chlorinating agents accounting for 1-1.5% of the total weight of the furnace charge when the furnace charge is proportioned, preparing a material pressing block, and carrying out reduction smelting in an oxygen-enriched side-blown furnace. According to the method, the chlorine content in the raw materials is actively regulated and controlled to be within therange of 1-1.5%, and is 5-15 times of the content of the dispersed elements in the secondary resource; and the method is particularly used for chloridizing and volatilizing the dispersed elements toachieve high-power enrichment and recovery of the dispersed elements, and has a remarkable resource utilization effect.

Description

technical field [0001] The invention relates to the nonferrous smelting industry, in particular to an oxygen-enriched side-blowing furnace smelting method in which secondary resources contain arsenic, iron, and scattered elements and chlorinating agents. Background technique [0002] In the non-ferrous smelting industry, the typical composition of pyro-smelting smoke and dust of lead is: Pb: 30-50%, Bi+Sb+Sn: 1-5%, S: 4-8%, As: 5-25%, SiO 2 +Fe+CaO: 2~6%, Cd: 2~6%, Se+Te+Tl+In+Ge: 0.02~0.2%; copper pyrometallurgical dust general typical composition: Pb: 10~25%, Cu : 5-15%, S: 5-8%, As: 5-30%, SiO 2 +Fe+CaO: 15-25%, Se+Te+Tl+In+Ge: 0.02-0.2%; typical composition of zinc wet leaching mud: Pb: 20-40%, Bi+Sb+Sn: 1-5% , S: 8-15%, As: 2-20%, SiO 2 +Fe+CaO: 20-30%, Se+Te+Tl+In+Ge: 0.02-0.2%. These non-ferrous metal raw materials are different from primary mine resources, commonly known as secondary resources. They have the following characteristics: First, the main valence met...

AI Technical Summary

Problems solved by technology

[0003] In the past, some people put lead smelting dust into the reverberatory furnace for reduction and smelting, mixed a large amount of alkali to make thin slag, and produced a large amount of alkali slag containing crude lead and arsenic. This alkali slag caused environmental risks and burdens

Some people use sulfuric acid to oxidize and leach copper fume to realize the separation and extraction of major metals such as copper and lead, but a large amount of arsenic enters the leachate, and this arsenic-containing wastewater poses risks and burdens to environmental protection

CN102286665A discloses a smelting method for arsenic-containing secondary resources. While reducing and smelting to recover the main valent metal lead, arsenic is solidified in arsenic-iron alloy as a subsequent smelting raw material, and no clear solution is made to the harmless opening of arsenic Program

To sum up, there is an obvious technical shortcoming in both industrial practice and technological progress, that is, the simultaneous recovery of the scattered elements Se, Te, Tl, In, Ge, etc. accompanying secondary nonferrous metal resources has been ignored, and these The value ratio of scattered elements is generally as high as 15-40%, resulting in a huge waste of precious resources