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A kind of solid hazardous waste-based mineral admixture and preparation method thereof

A mineral admixture and hazardous waste-based technology, applied in the field of building materials, can solve the problems of heavy metal ion enrichment, endanger human health, pollute soil and water, etc., achieve resource reuse, reduce environmental pollution damage, and improve The effect of social benefit

Active Publication Date: 2022-03-18
浙江合力海科新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to pursue profits, production enterprises sacrifice the environment and dump at will, seriously polluting soil and water, enriching heavy metal ions, and ultimately endangering human health

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A solid hazardous waste-based mineral admixture, including the following substances by mass percentage:

[0035] Crystal Sludge: 30%

[0036] Water purifier waste residue: 40%

[0037] Gangue: 15%

[0038] Calcium carbide sludge: 10%

[0039] Waste gypsum: 3%

[0040] Active stimulator: 2%.

[0041] Crystal sludge is a mixture of corundum, polishing powder, glass powder and other mixtures produced during the processing of crystal products. It is dehydrated by pressure filtration at 0.4MPa for 25 minutes to make its moisture content 18%, of which SiO 2 47% by weight, Al 2 o 3 The weight ratio is 18%.

[0042] The water purifying agent waste residue is the waste residue produced by the preparation of polyaluminum chloride water purifying agent from gibbsite soil, and is dehydrated by pressure filtration at 0.5MPa for 30min to make its moisture content 16%, wherein SiO 2 9% by weight, Al 2 o 3 The weight ratio is 34%, and the CaO weight ratio is 21%.

[0043] Co...

Embodiment 2

[0057] A solid hazardous waste-based mineral admixture, including the following substances by mass percentage:

[0058] Crystal Sludge: 48%

[0059] Water purifier waste residue: 30%

[0060] Gangue: 10%

[0061] Carbide sludge: 5%

[0062] Waste gypsum: 4%

[0063] Active stimulator: 3%.

[0064] Crystal sludge is a mixture of corundum, polishing powder, glass powder and other mixtures produced during the processing of crystal products. It is dehydrated by pressure filtration at 0.6MPa for 20 minutes to make its moisture content 15%, of which SiO 2 50% by weight, Al 2 o 3 The weight ratio is 18%.

[0065] The water purifying agent waste residue is the waste residue produced by the polyaluminum chloride water purifying agent prepared from bauxite, and is dehydrated by pressure filtration at 0.7MPa for 25min to make its moisture content 14%, wherein SiO 2 11% by weight, Al 2 o 3 The weight ratio is 38%, and the CaO weight ratio is 18%.

[0066] Coal gangue is solid w...

Embodiment 3

[0080] A solid hazardous waste-based mineral admixture, including the following substances by mass percentage:

[0081] Crystal Sludge: 40%

[0082] Water purifier waste residue: 35%

[0083] Gangue: 12%

[0084] Calcium carbide sludge: 7%

[0085] Waste gypsum: 3%

[0086] Active stimulator: 3%.

[0087] Crystal sludge is a mixture of corundum, polishing powder, glass powder and other mixtures produced during the processing of crystal products. It is dehydrated by pressure filtration at 0.5MPa for 23 minutes to make its moisture content 14%, of which SiO 2 53% by weight, Al 2 o 3 The weight ratio is 15%.

[0088] The water purifying agent waste residue is the waste residue produced by the polyaluminum chloride water purifying agent prepared from kaolin, and dehydrated with 0.6MPa pressure filtration for 27min to make its moisture content 16%, wherein SiO 2 10% by weight, Al 2 o 3 The weight ratio is 32%, and the CaO weight ratio is 20%.

[0089]Coal gangue is solid...

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Abstract

The invention belongs to the technical field of building materials, and in particular relates to a solid hazardous waste-based mineral admixture and a preparation method thereof. After drying and dehydrating the crystal sludge and water purifying agent waste residue, mix the crystal sludge, water purifying agent waste residue, coal gangue and calcium carbide sludge evenly, place them in a calciner for calcination, and the obtained sintered material is air-cooled by a cooler After use, the sintered material, waste gypsum and active activator are put into a ball mill for grinding to prepare a solid hazardous waste-based mineral admixture. The invention improves the activity and micro-expansion characteristics of the mineral admixture, is more suitable for use in various projects, realizes waste recycling, maximizes corporate benefits, detoxifies a variety of solid hazardous wastes, and reduces the impact of solid hazardous wastes on the environment. pollution.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a solid hazardous waste-based mineral admixture and a preparation method thereof. Background technique [0002] With the rapid development of my country's economic construction and industrialization, a large amount of industrial waste, such as waste residue, waste water and waste gas, is produced every year, especially hazardous waste containing heavy metals or other toxic components, which poses a threat to human health and the living environment. . [0003] During the processing of crystal products, a large amount of processing wastewater containing a mixture of emery, polishing powder, and glass powder is produced. The sludge formed after sedimentation and filtration is crystal sludge. The heavy metals in cement sludge are mainly As, Cr, Ni and Zn, among which As and Cr are the most abundant, the As content is about 500mg / kg, and the Cr content is about ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B18/04C04B18/12C04B20/04
CPCC04B40/0039C04B18/0418C04B18/0427C04B18/12C04B20/04C04B18/0445Y02W30/91
Inventor 丁小富
Owner 浙江合力海科新材料股份有限公司
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