Reduction smelting batching method for carrying out classification and iron blending on arsenic-containing sulfur-containing nonferrous metal-containing material to recycle nonferrous metals and make solid sulfur and solid arsenic harmless

Abstract

The invention discloses a reduction smelting batching method for carrying out classification and iron blending on an arsenic-containing sulfur-containing nonferrous metal-containing material to recycle nonferrous metals and make solid sulfur and solid arsenic harmless. The reduction smelting batching method comprises the steps that furnace charge raw materials are batched after being classified, and requirements are as follows: slags generated after smelting are high-silicon high-calcium slags, and the weight ratio of SiO2 to Fe to CaO in the slags is (30% to 35%) to (18% to 23%) to (16% to 20%); the level of main metals in a batched material is 18% to 45%; the content of Cl<-> is smaller than or equal to 2.5%; the total water content is smaller than or equal to 13.5%; the content of calcium oxide is 5% to 10%; and silicon, sulfur and arsenic in the batched material are subjected to classification and iron blending. According to the reduction smelting batching method, the level of arsenic and lead contained in smoke and the level of lead in the slags, sulfur and iron slags and an arsenic iron eutectic alloy are greatly reduced, the smelting direct recovery rate of the main metal lead is increased, production cost is reduced by 2% to 5%, approximately 65% or more of sulfur in the furnace charge can be cured in the sulfur and iron slags, pollution to the atmosphere is reduced, approximately 90% or more of arsenic in the furnace charge can be cured in the stable and nontoxic arsenic iron eutectic alloy, the arsenic iron eutectic alloy can be adopted as a counterweight materialto replace relatively expensive steel and iron counterweight materials, and arsenic is subjected to harmless and resource way developing treatment.

Description

technical field [0001] The invention relates to the non-ferrous smelting industry, especially related to the batching technology of the blast furnace charge, and specifically relates to a method of classifying iron-containing materials containing arsenic, sulfur, and ferrous metals, reducing and smelting the non-ferrous metals in the blast furnace, and simultaneously producing sulfur-iron slag for sulfur-fixing , By-product arsenic-iron-iron eutectic alloy with large proportion (commonly known as arsenic-iron-white matte) is a harmless arsenic-fixed batching method for furnace materials. Background technique [0002] In the non-ferrous smelting industry, enterprises specializing in the recycling of secondary resources containing arsenic, sulfur, and ferrous metals generally first leaching arsenic-containing materials with hot water to remove arsenic, and then recovering non-ferrous metals through blast furnace reduction smelting. Lime is used to precipitate arsenic in the ar...

AI Technical Summary

Problems solved by technology

But CN107164638A is only aimed at arsenic-containing materials, and in reality, non-ferrous metal secondary resource materials generally include various soot and leaching residues, etc., which not only contain arsenic, but also generally contain 2 to 15% sulfur at the same time, and this sulfur Most of them exist in the form of sulfate, which will seriously affect the progress of the process. It can be seen that the application of this patent application technology has serious limitations.

In addition, more importantly, the content of valuable non-ferrous metals contained in the by-product arsenic-iron-white matte produced is very limited. As a follow-up smelting raw material, it has no practical value, and its output is relatively large, and CN107164638A has no practical value for its material. The balance of input and output has not made a clear and feasible plan, leaving hidden dangers in environmental protection and safety