A method for treating regenerated lead using an improved side-blown smelting reduction furnace

Abstract

The invention provides a method for treating secondary lead through an improved side-blowing smelting reduction furnace. The method comprises the steps that the secondary lead is put into the improved side-blowing smelting reduction furnace, meanwhile, a smelting agent is added, oxygen-enriched gas, a reduction agent and fuel are sprayed into a smelting pool mixing area of the smelting reduction furnace at the flow speed of 180-280 m / s through multichannel spray guns on the two sides of the smelting reduction furnace, so that materials in the smelting reduction furnace are subjected to a smelting reduction reaction, and wet lead and smelting slag are generated; the wet lead and the smelting slag are included in the smelting pool mixing area at the same time; and the smelting slag is discharged out of a slag outlet of the smelting reduction furnace, and the wet lead is discharged out of a metal discharge opening of the smelting reduction furnace. The method for smelting the secondary lead is compact in procedure, small in fixed number of workers, environment-friendly and low in production cost.

Description

technical field [0001] The invention relates to the field of nonferrous metallurgy, in particular to a method for treating regenerated lead by using an improved side-blown smelting reduction furnace. Background technique [0002] Due to the current situation of tight supply of high-grade lead concentrates, the profit margins of lead concentrates are very low, and the secondary lead process for processing lead-containing secondary miscellaneous materials has been paid more and more attention. Lead and silver slag produced by hot acid leaching of jarosite, lead and silver slag produced by zinc oxide fumes, lead sulfate paste of waste lead-acid batteries, and lead soot produced by copper factories are in urgent need of treatment. [0003] The current mainstream treatment process for secondary lead miscellaneous materials is to enter the oxygen bottom-blown or oxygen-enriched top-blown smelting furnace together with the raw ore. However, due to the limited coverage of lead ore f...

AI Technical Summary

Problems solved by technology

[0003] The current mainstream treatment process for secondary lead miscellaneous materials is to enter the oxygen bottom-blown or oxygen-enriched top-blown smelting furnace together with the raw ore. However, due to the limited coverage of lead ore factories, most domestic non-mining lead enterprises adopt transfer sintering machine + blast furnace process. Secondary lead miscellaneous materials, but the traditional process has high energy consumption, serious environmental pollution, low degree of automation, and it is difficult to meet the increasingly stringent environmental requirements and access conditions of the country, so it has been basically eliminated

Other more advanced smelting processes are Essa method or Osmelt method, but the above two technologies are foreign proprietary technologies, the introduction cost is high and the construction investment is large, which is difficult for ordinary enterprises to bear

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