Comprehensive recovery technology for dedusting ash of iron smelting furnace

A technology of ironmaking blast furnace and process, which is applied in the field of comprehensive recovery process of ironmaking blast furnace dust removal, and can solve the problems of inability to recover valuable elements, lack of combined recovery technology of the whole industry chain, and inability to achieve comprehensive utilization mode of new building materials, etc. , to achieve the effect of improving work efficiency and reducing production costs

Inactive Publication Date: 2018-12-18
周全民
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing technology does not have a combined recycling technology for the entire industry chain, and it is impossible to fully recycle useful and valuable elements. Without the follow-up application of new building materials, it is impossible to achieve the comprehensive utilization model of "eat dry and squeeze clean".

Method used

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  • Comprehensive recovery technology for dedusting ash of iron smelting furnace

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Effect test

Embodiment 1

[0022] A comprehensive recovery process for iron-smelting blast furnace dust removal, the recovery process is as follows:

[0023] Step 1, passing the soot of the iron-smelting blast furnace into the high-temperature reduction reaction of the rotary kiln, and volatilizing to obtain enriched non-ferrous metals, high-chlorine-containing zinc-oxygen powder and kiln slag;

[0024] Step 2, the rotary kiln slag produced in step 1 is combined to obtain fine powder, iron concentrate and building materials auxiliary materials by means of joint beneficiation;

[0025] Step 3, the zinc oxide powder containing high chlorine is leached, dechlorinated, purified, and electrolyzed to produce refined zinc ingots, and the dechlorination waste liquid is evaporated and crystallized to produce industrial salt;

[0026] Step 4, the zinc extraction leaching residue obtained after leaching in step 3 is subjected to acid leaching, reduction, extraction, replacement, and electrolysis to produce 4N5 ind...

Embodiment 2

[0035] A comprehensive recovery process for iron-smelting blast furnace dust removal, the recovery process is as follows:

[0036] Step 1, passing the soot of the iron-smelting blast furnace into the high-temperature reduction reaction of the rotary kiln, and volatilizing to obtain enriched non-ferrous metals, high-chlorine-containing zinc-oxygen powder and kiln slag;

[0037] Step 2, the rotary kiln slag produced in step 1 is combined to obtain fine powder, iron concentrate and building materials auxiliary materials by means of joint beneficiation;

[0038] Step 3, the zinc oxide powder containing high chlorine is leached, dechlorinated, purified, and electrolyzed to produce refined zinc ingots, and the dechlorination waste liquid is evaporated and crystallized to produce industrial salt;

[0039] Step 4, the zinc extraction leaching residue obtained after leaching in step 3 is subjected to acid leaching, reduction, extraction, replacement, and electrolysis to produce 4N5 ind...

Embodiment 3

[0048] A comprehensive recovery process for iron-smelting blast furnace dust removal, the recovery process is as follows:

[0049] Step 1, passing the soot of the iron-smelting blast furnace into the high-temperature reduction reaction of the rotary kiln, and volatilizing to obtain enriched non-ferrous metals, high-chlorine-containing zinc-oxygen powder and kiln slag;

[0050] Step 2, the rotary kiln slag produced in step 1 is combined to obtain fine powder, iron concentrate and building materials auxiliary materials by means of joint beneficiation;

[0051] Step 3, the zinc oxide powder containing high chlorine is leached, dechlorinated, purified, and electrolyzed to produce refined zinc ingots, and the dechlorination waste liquid is evaporated and crystallized to produce industrial salt;

[0052] Step 4, the zinc extraction leaching residue obtained after leaching in step 3 is subjected to acid leaching, reduction, extraction, replacement, and electrolysis to produce 4N5 ind...

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Abstract

The invention belongs to the technical field of mineral products, and particularly relates to a comprehensive recovery technology for dedusting ash of an ironmaking blast furnace. Blast furnace ironmaking smoke dust and coke powder are added into a rotary kiln according to a certain proportion and subjected to high-temperature reduction volatilization, and high zinc oxychloride volatilization dustcontaining zinc, indium, lead, bismuth, tin, cadmium and the like is collected; the high zinc oxychloride powder is subjected to zinc making through a conventional wet method process technology, andvaluable metal such as indium, lead, bismuth, tin and cadmium is recovered; and kiln slag is subjected to mineral separation, and high-grade carbon powder and iron ore concentrates are obtained. According to the comprehensive recovery technology, a comprehensive recycling technology is adopted, the waste blast furnace dedusting ash can be turned into treasure, and the high economic benefits and social benefits are generated.

Description

technical field [0001] The invention belongs to the technical field of minerals, and in particular relates to a comprehensive recovery process for dust removal from an iron-smelting blast furnace. Background technique [0002] As the country with the largest iron and steel production in the world, my country produces about 9 to 12 million tons of iron-smelting fume solid waste every year. Due to the complex composition, small particle size and large fluctuation of water content, the utilization of this fume is difficult. In addition to iron, it also contains heavy metals such as lead, zinc, and cadmium. If they are not handled carefully, heavy metals in various chemical states or chemical forms will remain, accumulate and migrate once they enter the environment or ecosystem. , causing harm to the environment and the lives of residents. The existing technology does not have the combined recycling technology of the whole industry chain, and cannot fully recover the useful val...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/02C22B19/20C25C1/16C22B58/00C25C1/22C22B30/06C22B13/00C22B25/06C22B17/00
CPCC22B7/007C22B7/02C22B13/045C22B17/04C22B19/20C22B25/04C22B25/06C22B30/06C22B58/00C25C1/16C25C1/22Y02P10/20
Inventor 周全民
Owner 周全民
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