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Method for producing cold bound pellet agglomerate through solid waste and hazardous waste

A technology for sintering and hazardous waste, applied in the direction of improving process efficiency, etc., can solve problems such as inability to achieve harmlessness, reduction, resource utilization, large floor space, secondary pollution, etc.

Inactive Publication Date: 2016-08-03
CHONGQING WEIJIN ENVIRONMENT PROTECTION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Landfill disposal: covers a large area, cannot achieve the ultimate goal of harmlessness, reduction, and resource utilization, and gradually leaks over time to cause secondary pollution
[0004] Co-processing with cement kilns, etc.: can only be added in a small amount, and cannot solve the large-scale production of such industrial solid waste and hazardous waste
Can not be completely harmless, can not be completely detoxified
Secondary pollution caused by no special flue gas treatment device
[0005] Incineration method and metallurgical equipment processing: only incineration method, many heavy metals cannot be processed, will cause serious secondary pollution, for example, hexavalent chromium can only be converted into unstable trivalent chromium, in oxidizing atmosphere or air with humidity It will be re-oxidized to hexavalent chromium. If it needs to be converted into metallic chromium, it will require a large investment to build a smelting system for disposal, and the investment and cost will be high.

Method used

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  • Method for producing cold bound pellet agglomerate through solid waste and hazardous waste
  • Method for producing cold bound pellet agglomerate through solid waste and hazardous waste

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Take 2 tons of blast furnace gas ash, 8 tons of iron oxide scale, grind to a particle size of 200 mesh, sieve, add about 200 kg of bentonite, soda lime and other additives, mix evenly, and then use a disc pelletizer to pelletize. The particle size of the pellets is 5-15mm, and the number of falls reaches more than 3 times, and then sent to the belt sintering machine for sintering at a sintering temperature of 1100°C to obtain sintered ore, which can be used for blast furnace smelting. See Table 1 and Table 2 for relevant indicators.

[0014] Table 1 Physicochemical composition of cold solidified pellets of metallurgical solid waste (%, green pellets)

[0015]

[0016] Table 2 Comparison table of indicators before and after sintering application of metallurgical solid waste cold solidified pellets

[0017]

[0018] It can be seen from the above table that the main indicators of sintering are significantly improved after sintering with metallurgical solid waste col...

Embodiment 2

[0020] Take 1 ton of chromium slag, 9 tons of dedusting ash, grind them finely, sieve through 200 meshes, add about 200 kg of bentonite, soda lime and other additives, mix evenly, and then use a disc pelletizer to make pellets, and the number of drops reaches 3 More than one time, then sent to the belt sintering machine for sintering, cooling to obtain chromium-containing sinter, which can be used for blast furnace ferrochrome smelting.

Embodiment 3

[0022] Take 1 ton of electroplating sludge, 9 tons of sintering dust and dust, sieve through 200 mesh, add about 100 kg of bentonite, soda lime and other additives, mix evenly, and then use a disc pelletizer to make pellets, and the number of drops reaches 3 times Above, then sent to the belt sintering machine for sintering, cooling to obtain sintered ore containing chromium and nickel, which can be used for blast furnace smelting.

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Abstract

The invention discloses a method for producing cold bound pellet agglomerate through solid waste and hazardous waste. The solid waste and hazardous waste such as converter sludge, power sludge, different types of fly ash produced in ferrous metallurgy production, and a large amount of sulfuric-acid residues, chromic slag, electroplating sludge, chemical industry sludge, petroleum sludge (catalysts) and other chemical industry solid waste and hazardous waste which are produced in the chemical industry production are subjected to technology processing such as crushing, levigating, burdening, mixing, disc balling and sintering to produce the agglomerate which can be used for a blast furnace, so that the ultimate purposes of harmlessness and reclamation of the solid waste and hazardous waste are achieve, and the good socioeconomic benefits and eco-environment benefits are achieved.

Description

technical field [0001] The invention relates to the field of comprehensive utilization of solid waste and hazardous waste, and more specifically relates to a method for producing cold-set spherical sinter by utilizing solid waste and hazardous waste. Background technique [0002] At present, solid waste and hazardous waste such as converter sludge, power sludge, and various types of dust ash produced in iron and steel metallurgical production, and a large amount of sulfuric acid slag, chromium slag, electroplating sludge, chemical sludge, and petroleum sludge produced in chemical production (Catalyst) and other chemical solid waste and hazardous waste are mainly treated in the following ways: [0003] Landfill disposal: It occupies a large area, and cannot achieve the ultimate goal of harmlessness, reduction, and resource utilization, and gradually leaks over time to cause secondary pollution. [0004] Co-processing with cement kilns, etc.: only a small amount can be added,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/20C22B1/248
CPCC22B1/20C22B1/248Y02P10/20
Inventor 赖红君
Owner CHONGQING WEIJIN ENVIRONMENT PROTECTION TECH CO LTD