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Stabilizing treatment method for sulfide arsenic-removed dregs

A stabilization treatment, arsenic sulfide technology, applied in the direction of solid waste removal, etc., can solve problems such as environmental pollution

Inactive Publication Date: 2016-04-20
KUNMING UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0031] In order to solve the problems existing in the above-mentioned prior art, the object of the present invention is to provide a method for stabilizing the arsenic sulfide slag, so as to realize the stabilization treatment of the arsenic sulfide slag, so as to achieve the purpose of safe stacking or landfill, and solve the problem of arsenic sulfide slag stabilization. environmental pollution problems

Method used

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  • Stabilizing treatment method for sulfide arsenic-removed dregs
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  • Stabilizing treatment method for sulfide arsenic-removed dregs

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] like figure 1 Shown, 1) Raw material and raw material pretreatment

[0046] (1) Using copper smelting arsenic sulfide slag as raw material, its main element composition is shown in Table 1.

[0047] Table 1 Composition of main toxic elements in arsenic sulfide slag from copper smelting

[0048]

[0049] (2) preparation of cementitious material: get 25 parts of cement clinker, 70 parts of dry slag, 5 parts of dry copper slag, carry out ball milling with ball mill, particle size requirement is to cross 180 mesh square hole sieves and the remainder is less than 5wt%, stand-by;

[0050] (3) Pretreatment of arsenic sulfide slag: take 10 parts of dry basis of arsenic sulfide slag and 10 parts of carbide slag, mix them evenly in a horizontal mixer, and age for 24 hours for use.

[0051] 2) Process: Take 75 parts of self-made cementitious materials, 25 parts of dry base samples pretreated with arsenic sulfide slag (after analysis, its moisture content is 52.82wt%), that is...

Embodiment 2

[0057] 1) Raw materials and raw material pretreatment

[0058] (1) Using tin smelting arsenic sulfide slag as raw material, its main element composition is shown in Table 3.

[0059] Table 3 Composition of main toxic elements in tin smelting arsenic sulfide slag

[0060]

[0061] (2) preparation of cementitious material: get 30 parts of cement clinker, 60 parts of dry slag, 10 parts of dry copper slag, carry out ball milling with ball mill, particle size requirement is to cross 180 mesh square hole sieves and the remainder is less than 5wt%, stand-by;

[0062] (3) Pretreatment of arsenic sulfide slag: take 10 parts of dry basis of arsenic sulfide slag and 12 parts of carbide slag, mix them evenly in a horizontal mixer, and age for 24 hours for use.

[0063] 2) Process: take 70 parts of self-made cementitious materials, 30 parts of dry base samples pretreated with arsenic sulfide slag (after analysis, its moisture content is 45.25wt%), that is, 54.79 parts of wet materials,...

Embodiment 3

[0070] 1) Raw materials and raw material pretreatment

[0071] (1) Using copper smelting arsenic sulfide slag as raw material, its main element composition is shown in Table 5.

[0072] Table 5 Composition of main toxic elements in copper smelting arsenic sulfide slag

[0073]

[0074] (2) Preparation of cementitious material: get 28 parts of cement clinker, 67 parts of dry slag, and 5 parts of dry copper slag, and carry out ball milling with a ball mill.

[0075] (3) Pretreatment of arsenic sulfide slag: Take 10 parts of dry basis of arsenic sulfide slag and 11 parts of carbide slag, mix them evenly in a horizontal mixer, and age for 24 hours for use.

[0076] 2) Process: Take 65 parts of self-made cementitious materials, 35 parts of dry base samples pretreated with arsenic sulfide slag (after analysis, its moisture content is 42.25wt%), that is, 60.61 parts of wet materials, and the added effective chloride content is 75wt% 0.13 part of industrial water treatment calciu...

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Abstract

The invention discloses a stabilizing treatment method for sulfide arsenic-removed dregs. The stabilizing treatment method comprises the following steps: mixing cement clinker, mineral slag and copper slag in a ratio of parts by mass being (25-30) to (60-70) to (5-10), carrying out ball-milling on the materials, and enabling the materials to pass through a 180-mesh square hole sieve with weight of screen residues being 5wt%, thereby preparing a gel material; mixing arsenic sulfide slag and carbide slag in a dry-weight mass ratio being 1 to (1.0-1.2), and ageing and pre-treating the arsenic sulfide slag and carbide slag for 24 hours; preparing the pre-treated arsenic sulfide slag and the self-made gel material in a ratio of parts by mass being (25-35) to (65-75), adding calcium chloride with gel material amount being 0.4-0.5wt% or a mixture of calcium chloride and sodium chloride as an additive, controlling moisture content of materials to be 20-22wt%, mixing the materials on a horizontal type stirrer to macroscopically homogenize the materials, putting the homogenized materials into a continuous kneading extruder to forcibly mix, extrude, cut, naturally cure and carry out steam curing for 10 hours under pressure of 0.8-1.0MPa, and carrying out a toxicity leaching test on a solidified body according to GB5085.3-2007 to enable the solidified object to meet stock-piling or filling requirements.

Description

technical field [0001] The invention relates to the technical field of solidification and safety treatment of hazardous solid waste, in particular to a method for stabilizing sulfidation and arsenic removal slag. Background technique [0002] Arsenic is mainly associated or symbiotic in various metal ores in the form of sulfide, such as iron ore, copper ore, lead-zinc ore, etc. During the smelting process of these metal ores, arsenic is mainly gasified in the form of oxides and then transferred to the tail gas Among them, most of them are collected in solid form by the dust removal system, and the rest are dissolved in the absorption liquid with arsenic acid or arsenous acid in the washing and dust removal process. When sodium sulfide is added to remove arsenic, the precipitate produced is called arsenic sulfide slag. Existence form in arsenic sulfide slag is As 2 S 3 or As 2 S 5 . As the waste acid used to treat smelting flue gas generally contains AsO 2- , AsO4 3- 、...

Claims

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Application Information

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IPC IPC(8): B09B3/00B09B5/00
CPCB09B3/00B09B5/00
Inventor 孙宝辉宋连民周杰夏举佩苏毅李国斌罗中秋宁勤科
Owner KUNMING UNIV OF SCI & TECH
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