Composite stabilizing reagent for dearsenization residues and application thereof

A stabilization and arsenic removal technology, applied in the restoration of contaminated soil, etc., can solve the problems of poor leaching stability and low toxicity leaching concentration, and achieve the effect of inhibiting microorganisms, ensuring long-term effects, and better long-term stability effects

CN110227229AActive Publication Date: 2019-09-13湖南中核勘探有限责任公司 +4
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2019-09-13

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Abstract

The invention discloses a composite stabilizing reagent for dearsenization residues. The composite stabilizing reagent for dearsenization residues comprises 20-50 wt% of FeS, 10-40 wt% of Fe2O3, 10-40wt% of FeSO4 and 20-50 wt% of Schwertmannite. The composite stabilizing reagent of the invention reacts with the dearsenization residues to obtain stabilized arsenic-containing minerals, has low toxicity leaching concentration, and can be stably stockpiled in strong acid-basic and strong reducing environments.
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Description

technical field

[0001] The invention belongs to the technical field of mineral arsenic fixation, and in particular relates to a compound stabilization agent for arsenic removal slag and its application. Background technique

[0002] Arsenic is a highly toxic element with high carcinogenicity, and is widely associated in various non-ferrous metal smelting process systems. In the past 30 years, with the rapid development of my country's nonferrous metal industry, the problem of arsenic pollution has become more and more serious, seriously threatening people's lives and health. Therefore, the research on arsenic pollution control is an urgent and significant topic.

[0003] At present, arsenic fixation technologies mainly include encapsulation and mineral arsenic fixation. Encapsulation is to use cement, glass and other materials to coat arsenic-containing materials so that they can be stored stably. This method has a large amount of solid waste and high cost, making it diff...

Examples

Embodiment 1

[0027] The composite stabilization agent for arsenic removal slag used in this embodiment includes the following components:

[0028]

[0029] Method of use: Take 2kg of arsenic removal slag with a pH of 12, add 8wt% compound stabilizing agent, stir for 15 minutes to mix evenly, and after standing, covering and curing for seven days, use the method specified in (GB18598-2001) to perform leaching toxicity Analysis showed that its arsenic leaching concentration was 0.13mg / L.

Embodiment 2

[0031] The composite stabilization agent for arsenic removal slag used in this embodiment includes the following components:

[0032]

[0033] Method of use: Take 2kg of arsenic removal slag whose pH has been adjusted to about 4, add 8wt% compound stabilizing agent, stir for 15 minutes to mix evenly, after standing, covering and curing for seven days, use the method specified in (GB18598-2001) The leaching toxicity analysis was carried out, and the arsenic leaching concentration was 0.67mg / L.