Method for comprehensively efficiently processing lead anode slime by using top-blown converter

Abstract

The invention discloses a method for comprehensively efficiently processing lead anode slime by using a top-blown converter. The method comprises processes of preparation of a mixed material, first reduction smelting, reduction for gold catching, secondary converting, and recovering of arsenic and antimony. The method specifically comprises: uniformly mixing lead anode slime according to dry weight, a slagging flux, a recycled material and a reducing agent to form the mixed material; spraying a fuel accounting for 1-10% by weight of the material into the molten pool of the top-blown converter, controlling melting temperature of the top-blown converter at 900 DEG C-1200 DEG C, after a complete reaction, discharging a slag layer formed by floating upward through a discharge outlet for recovery processing, wherein lead reduced by the reducing agent catches gold and silver and forms an expensive lead layer; performing further strengthening converting on the expensive lead layer, discharging through the discharge outlet for continuous refining; and cooling and dedusting the high-temperature flue dust via a waste-heat reclamation device to obtain an arsenic antimony flue dust. The method of the invention has the advantages of a show flow, low gold content and silver content in the slag, a long service life of the converter, substantial economical benefit, large processing amount, strong raw-material adaptability, high automation level, environmental protection, safe and the like.

Description

technical field [0001] The invention belongs to the technical field of nonferrous metallurgy smelting, and in particular relates to a method for comprehensively and efficiently treating lead anode slime by using a top-blown furnace. Background technique [0002] Lead anode slime mainly contains gold, silver, bismuth, lead, copper, arsenic, antimony and other metal elements. At present, there are basically three methods for the treatment of lead anode slime: one is the pyrotechnic process; the other is the all-wet process; the third is the combined pyro-wet process. The wet process has a large consumption of reagents, serious equipment corrosion, heavy maintenance workload, complicated waste liquid treatment process, low labor productivity, high production cost, and lengthy process, which is only suitable for small-scale production; the combined fire-wet process has high costs, There is a large amount of waste water, and it is difficult to recycle waste gas, and the drying a...

AI Technical Summary

Problems solved by technology

However, the process has segmental operations, and the processes such as feeding, precious lead, and slag cannot be completed continuously, the operation is difficult, and the problems such as short furnace life have not been completely resolved.

In recent years, my country has researched and developed methods such as oxygen-enriched bottom blowing and side blowing smelting to treat lead anode slime, but there are still short furnace life, high energy consumption, low gold and silver enrichment, high silver content in residue, and low metal recovery rate , poor environmental protection, etc.

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