Method for treating zinc-containing solid waste in metallurgy industry by Ouzhi furnace

Abstract

The invention discloses a method for treating zinc-containing solid waste in metallurgy industry by an Ouzhi furnace. The method comprises the following steps of uniformly mixing the zinc-containing solid waste (zinc-containing sludge or converter secondary dust or electric furnace dust) generated in metallurgy industry, coarse ash, oxidized scale powder, lime and bonding agents according to the weight percentage, wherein the zinc-containing solid waste accounts for 50 weight percent; the coarse ash accounts for 12 weight percent; the oxidized scale powder accounts for 27 percent; the lime accounts for 3 percent; the bonding agents account for 8 weight percent; then, pressing the materials into cold solid zinc-containing sludge pellets with the diameter being about 40mm by a cold pressingpelletizing machine; basically maintaining the pressure-resistant intensity of the cold solid zinc-containing sludge pellets at about 800N / pellet; adding the pellets into the Ouzhi furnace to be used.The method has the advantages that the zinc-containing solid waste can be effectively used, so that the metal zinc content is enriched; the total dust generation quantity is reduced.

Description

technical field [0001] The invention relates to a method for treating zinc-containing solid waste in the metallurgical industry by an Ouye furnace. Background technique [0002] Iron and steel metallurgical enterprises produce a large amount of dust and sludge every year, part of which is zinc-free and low-zinc dust and sludge, and this part of dust and sludge is basically used for secondary use. However, some dust sludge with high zinc content (zinc content is more than 1%), including blast furnace gas bag ash, converter secondary dust, electric furnace dust, Ouyeel furnace sludge, etc. The above dust sludge contains high iron and carbon, which is a secondary resource that can be used and is worth recycling. However, due to the high zinc content of the above dust sludge, if it is returned to sintering production, zinc will be enriched between blast furnace, Ouye furnace and sintering cycle, which has an impact on blast furnace production. Therefore, the blast furnace zinc...

AI Technical Summary

Problems solved by technology

Therefore, the above-mentioned high-zinc dust cannot be returned to sintering for recycling

In the past, zinc-containing dust and mud were basically piled in the open air, which not only occupied the site, but also directly caused environmental pollution; what is more serious is that due to the metal elements such as Zn and Pb contained in the dust, when stacked in the open air, due to the effects of rain and snow melting, Toxic and harmful elements are seeped into the ground and thus enter the plant and food circle with serious consequences