Comprehensive recycling process of second zinc oxide rotary kiln tailings and production line of comprehensive recycling process

Abstract

The invention discloses a comprehensive recycling process of second zinc oxide rotary kiln tailings and a production line of the comprehensive recycling proces. The process comprises the following steps of screening, crushing, dry magnetic separation, ball milling, magnetic separation, reselection, ball milling, magnetic separation, reselection, dehydration, reduction, screening and packaging. The production line of the comprehensive recycling process of the second zinc oxide rotary kiln tailings comprises a discharge bin, a vibrating screen, a vertical hammer crusher, a magnetic separation belt, a first single-bin ball mill, a first wet type half counter-current magnetic separator, a first precipitation type classifier, a second single-bin ball mill, a second wet type half counter-current magnetic separator, a second precipitation type classifier, a vibrating dehydrator, a drying kiln, a rotary type hydrogen reducing furnace, a three-dimensional vibrating screen and another discharge bin, wherein the discharge bin, the vibrating screen, the vertical hammer crusher, the magnetic separation belt, the first single-bin ball mill, the first wet type half counter-current magnetic separator, the first precipitation type classifier, the second single-bin ball mill, the second wet type half counter-current magnetic separator, the second precipitation type classifier, the vibrating dehydrator, the drying kiln, the rotary type hydrogen reducing furnace, the three-dimensional vibrating screen and the other discharge bin are arranged in sequence. The comprehensive recycling process and the production line of the comprehensive recycling process have the advantages of energy conservation and emission reduction, resource recycling is realized, energy consumption and manpower are effectively reduced, and the product quality is increased.

Description

technical field [0001] The invention relates to heating equipment, in particular to a process for comprehensive recycling of secondary zinc oxide rotary kiln tailings. Background technique [0002] At present, there are about 140 secondary zinc oxide enterprises in the country, and the annual zinc oxide slag produced is more than 6 million tons. The treatment cannot maximize the net benefits of eating dry and squeezing. The invention can deeply and efficiently utilize the zinc oxide waste residue, greatly improving the resource utilization rate and economic benefits. The main metal component of zinc oxide slag is Fe, and the content of Fe is about 20%-30%. The current domestic mainstream process for zinc oxide slag treatment is: ball milling—magnetic separation. The product produced by this process is iron fine powder. The iron content is between 50% and 70%. Because of the large proportion of metallic iron, there is a phenomenon of yellowing and agglomeration. Steel plant...

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Problems solved by technology

Due to the low price of the existing zinc oxide slag treatment process, it basically does not produce benefits, or only makes a small profit and cannot completely recycle the zinc slag

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