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...

Examples

Embodiment Construction

[0018] A method for Ouyeel furnace to dispose of zinc-containing solid waste in the metallurgical industry, comprising the following steps: for the zinc-containing solid waste generated in the metallurgical industry: zinc-containing sludge or secondary dust of the converter or electric furnace dust, and coarse ash and iron oxide scale powder , lime and binder are mixed according to weight percentage, wherein the weight ratio of zinc-containing solid waste is 50%, coarse ash is 12%, iron oxide scale powder is 27%, lime is 3%, and binder is 8%, and then Use a cold-press pelletizer to press into cold-set zinc-containing sludge pellets with a diameter of about 40mm, and the compressive strength of the cold-set oily sludge pellets is basically maintained at about 800N / ball, which is added to the Ouyeel furnace for use. The binding agent is bentonite or other pelletizing adhesives.

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...

Examples

Embodiment Construction

[0018] A method for Ouyeel furnace to dispose of zinc-containing solid waste in the metallurgical industry, comprising the following steps: for the zinc-containing solid waste generated in the metallurgical industry: zinc-containing sludge or secondary dust of the converter or electric furnace dust, and coarse ash and iron oxide scale powder , lime and binder are mixed according to weight percentage, wherein the weight ratio of zinc-containing solid waste is 50%, coarse ash is 12%, iron oxide scale powder is 27%, lime is 3%, and binder is 8%, and then Use a cold-press pelletizer to press into cold-set zinc-containing sludge pellets with a diameter of about 40mm, and the compressive strength of the cold-set oily sludge pellets is basically maintained at about 800N / ball, which is added to the Ouyeel furnace for use. The binding agent is bentonite or other pelletizing adhesives.