Rotary hearth furnace for processing lead-zinc-containing melting slag

Abstract

The invention provides a rotary hearth furnace for processing lead-zinc-containing melting slag. A feeding region, a lead reducing region, a zinc volatilization region, a lead volatilization region, an iron reduction region and a discharging region are sequentially formed in the rotary hearth furnace in the raw material moving direction, wherein a partition wall is respectively arranged between the feeding region and the lead reducing region, between the lead reduction region and the zinc volatilization region, and between the lead volatilization region and the iron reduction region; the zinc volatilization region is provided with a first smoke gas outlet; the lead volatilization region is provided with a second smoke gas outlet; the feeding region is provided with a feeding opening; the discharging region is provided with a discharging opening. When the rotary hearth furnace is used, lead, zinc and iron in the lead-zinc-containing melting slag can be singly separated.

Description

technical field [0001] The invention belongs to the field of energy and metallurgy, in particular, the invention relates to a rotary hearth furnace for processing smelting slag containing lead and zinc. Background technique [0002] Smelting slag (dust) containing lead and zinc mainly includes waste slag from the smelting process of lead and zinc and a kind of metallurgical dust that is inevitable in the production of iron and steel plants. [0003] Lead and zinc are indispensable important metal materials in the process of national economic development, and are widely used in industrial production and human beings. In recent years, lead and zinc smelting enterprises have developed rapidly, and China has become one of the most important lead and zinc producers in the world. [0004] The scale and number of lead-zinc smelting enterprises in my country have been expanding year by year, the output of lead-zinc has increased rapidly, and smelting technology has made great progr...

AI Technical Summary

Problems solved by technology

However, the common problems in these pyrotechnics are: 1) the processed products are mostly secondary dust and iron-containing waste slag containing zinc and lead oxides, or low-grade metal zinc, lead and molten iron; 2) its processing mainly For the purpose of recycling the iron in the dust, the by-products of zinc-lead secondary dust are used as raw materials for zinc smelting or lead smelting; 3) The zinc and lead after treatment have not been effectively separated. To use zinc and lead resources, the secondary dust must be treated Reprocessing to separate zinc and lead, which greatly increases processing steps and costs

According to research reports, at present, it is still impossible to deal with zinc-lead dust with low iron content and high lead content at home and abroad, and no effective treatment method for one-time separation of zinc and lead has been proposed.

Images