Unlock instant, AI-driven research and patent intelligence for your innovation.

Ternary precursor arsenic-containing waste residue harmless treatment method

A technology of harmless treatment and precursors, applied in the direction of protective devices against harmful chemicals, etc., can solve the problems of non-industrialized disposal process, and achieve the effects of short disposal cycle, stable effect and strong applicability

Inactive Publication Date: 2021-03-19
贵州中伟资源循环产业发展有限公司
View PDF7 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, reports on the hazardous disposal of arsenic-containing precursor waste residues are rare, and there is no industrialized disposal process

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Ternary precursor arsenic-containing waste residue harmless treatment method
  • Ternary precursor arsenic-containing waste residue harmless treatment method
  • Ternary precursor arsenic-containing waste residue harmless treatment method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055]This embodiment provides a method for harmless treatment of arsenic-containing waste residue of ternary precursor. The mass content of each substance in the raw material is shown in Table 1 below:

[0056] Table 1 Composition of ternary precursor arsenic-containing waste residue

[0057] Ni Fe As co Cr Cu mn Pb Zn Cd 1.44 4.23 0.60 0.30 0.015 0.61 0.0053 0.0036 0.030 0.0003

[0058] Mix the arsenic-containing waste residue of the ternary precursor with water and stir to prepare a slurry with a water content of 200%, add sulfuric acid to adjust the pH of the slurry to 3.5, then add hydrogen peroxide, stir for 30 minutes, then add lime to adjust the pH of the slurry to 8.0 , and then add curing agent sodium formex according to 3.5% of the total weight of the arsenic-containing waste residue of the ternary precursor, stir and react for 60 minutes; then carry out pressure filtration to separate solid and liquid, and cure the solidi...

Embodiment 2

[0062] This embodiment provides a method for harmless treatment of arsenic-containing waste residue of ternary precursor. The total arsenic content in the raw material is 0.8wt%, and the total heavy metal content is 9.12wt%.

[0063] Mix the arsenic-containing waste residue of the ternary precursor with water and stir to prepare a slurry with a water content of 250%. Add sulfuric acid to adjust the pH of the slurry to 4.0, then add hydrogen peroxide, stir for 40 minutes, then add lime to adjust the pH of the slurry to 7.5 , then add curing agent sodium formex according to 3% of the total weight of the arsenic-containing waste residue of the ternary precursor, stir and react for 55 minutes; then perform pressure filtration to separate solid and liquid, and cure the solidified body for 2 days.

[0064] The leaching results of the cured body toxicity test: pH=3.0, total arsenic=0.4mg / L, total heavy metal=2.9mg / L.

Embodiment 3

[0066] This embodiment provides a method for harmless treatment of arsenic-containing waste residue of ternary precursor. Raw material is identical with embodiment 1.

[0067] Mix the arsenic-containing waste residue of the ternary precursor with water and stir to obtain a slurry with a water content of 220%. Add sulfuric acid to adjust the pH of the slurry to 3.8, then add sodium persulfate, stir for 20 minutes, and then add calcium hydroxide to adjust the slurry. The pH of the body is 9, then add the curing agent sodium sulfide according to 4% of the total weight of the arsenic-containing waste residue of the ternary precursor, stir and react for 30 minutes; then carry out pressure filtration to separate the solid and liquid, and cure the solidified body for 5 days.

[0068] The leaching results of the cured body toxicity test: pH=3.0, total arsenic=0.3mg / L, total heavy metal=2.7mg / L.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a ternary precursor arsenic-containing waste residue harmless treatment method, and relates to the field of environmental protection. The ternary precursor arsenic-containing waste residue harmless treatment method comprises the steps: mixing raw materials including ternary precursor arsenic-containing waste residues and water to obtain slurry, and then mixing the slurry andan oxidizing agent to be subjected to an oxidation reaction; and mixing the reaction system with a value adjusting agent during or after the oxidation reaction, then adding a curing agent to form a cured body, and maintaining the cured body after solid-liquid separation. According to the ternary precursor arsenic-containing waste residue harmless treatment method, normal-temperature and normal-pressure operation is achieved, the process is simple, and the industrial operation effect is stable; and the price of the used medicament is low, and the toxic leaching of the solidified body reaches the standard of hazardous waste landfill sites.

Description

technical field [0001] The invention relates to the field of environmental protection, in particular to a method for harmless treatment of arsenic-containing waste residue of a ternary precursor. Background technique [0002] According to the survey data released by Zhiyan Consulting, the total output of ternary precursors in 2019 is about 278,000 tons, a year-on-year increase of 24.6%. By 2026, it is estimated that the total long-term production capacity of 19 domestic precursor companies will exceed 1.5 million tons; Under normal circumstances, a production enterprise produces 0.4 tons of waste residue for every 1 ton of precursor raw materials produced. At present, reports on the hazardous disposal of arsenic-containing precursor waste residues are rare, and there is no industrialized disposal process. [0003] With the implementation of the sustainable development strategy, people pay more and more attention to circular economy and clean production technology. In recen...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): A62D3/33A62D101/43
CPCA62D3/33A62D2101/43A62D2203/02
Inventor 易振鸿周运武胡石春彭扬廖文韬
Owner 贵州中伟资源循环产业发展有限公司