Vulcanized arsenic-removed slag stabilization treatment method

A technology for stabilization treatment and arsenic removal, applied in sustainable waste treatment, solid waste management, climate sustainability, etc., can solve environmental pollution and other problems, and achieve simple equipment, easy industrial implementation, and strong corrosiveness Effect

Inactive Publication Date: 2017-03-08
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0031] The purpose of the present invention is to realize the stabilization treatment of sulfide arsenic slag, so as to achieve the purpose of safe stacking or landfill, and solve the problem of environmental pollution caused by sulfide arsenic slag

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] 1. Raw materials and raw material pretreatment

[0050] (1) The sulfidation and arsenic removal slag of arsenic-containing wastewater from copper smelting is used as raw material, and its main element composition is shown in Table 1.1;

[0051] Table 1.1 Composition of main toxic elements in copper smelting arsenic sulfide slag

[0052] ;

[0053] (2) Preparation of cementitious material: Take 25g of cement clinker, 70g of dry blast furnace slag, and 5g of dry copper slag, mix them, and perform ball milling with a ball mill.

[0054] (3) Pretreatment of arsenic sulfide slag: According to the mass ratio of smelting arsenic-containing wastewater sulfidation and arsenic removal slag dry base to carbide slag at a ratio of 1:1, mix the smelting arsenic-containing wastewater sulfide arsenic slag and carbide slag in a horizontal mixer Uniform, after aging for 24 hours, the pretreated sulfurized arsenic removal slag was obtained;

[0055] 2. Take 75g of cementitious materi...

Embodiment 2

[0061] 1. Raw materials and raw material pretreatment

[0062] (1) Using tin smelting sulfidation and arsenic removal slag as raw material, its main element composition is shown in Table 2.1;

[0063] Table 2.1 Composition of main toxic elements in tin smelting arsenic sulfide slag

[0064] ;

[0065] (2) Preparation of cementitious material: Take 30g of cement clinker, 60g of dry blast furnace slag, and 10g of dry copper slag, mix them, and perform ball milling with a ball mill.

[0066] (3) According to the mass ratio of smelting arsenic-containing wastewater sulfidation and arsenic removal slag dry base to carbide slag at a ratio of 1:1.2, mix the smelting arsenic-containing wastewater sulfide arsenic removal slag and carbide slag evenly in a horizontal mixer, and age for 24 hours. Obtain pretreatment sulfidation and arsenic removal slag;

[0067] 2. Process: take 70g of cementitious material, pretreat 30g of dry base sample of sulfurized arsenic removal slag (after an...

Embodiment 3

[0073] 1. Raw materials and raw material pretreatment

[0074] (1) Copper smelting sulfidation and arsenic removal slag is used as raw material, and its main element composition is shown in Table 3.1;

[0075] Table 3.1 Composition of main toxic elements in copper smelting arsenic sulfide slag

[0076] ;

[0077](2) Preparation of cementitious material: Take 28g of cement clinker, 67g of dry blast furnace slag, and 5g of dry copper slag, mix them, and perform ball milling with a ball mill.

[0078] (3) According to the mass ratio of smelting arsenic-containing wastewater sulfidation and arsenic removal slag dry basis to carbide slag at a ratio of 1:1.1, mix the smelting arsenic-containing wastewater sulfide arsenic removal slag and carbide slag evenly in a horizontal mixer, and age for 24 hours. Obtain pretreatment sulfidation and arsenic removal slag;

[0079] 2. Process: take 65g of cementitious material, pretreat 35g of dry base sample of sulfurized arsenic removal sla...

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Abstract

The invention discloses a vulcanized arsenic-removed slag stabilization treatment method, and belongs to the technical field of hazardous solid waste curing and safe treatment method. According to the method, smelted arsenic-containing wastewater vulcanized arsenic-removed slag is used as a raw material and is pretreated by carbide slag, a cementitious material and an additive are added, stabilization treatment of arsenic, fluorine, lead, cadmium, mercury and other toxic elements in the vulcanized arsenic slag is achieved through primary mixing, strong mixing, extruding, cutting molding, natural curing and steam curing, and a solidified body is subjected to a toxic leaching test according to GB5085.3-2007 and meets stockpiling or landfill requirements. The vulcanized arsenic slag with various sources can be treated by the method; compared with the prior art, the method has the advantages of simple equipment, convenience in operation and easy industrialized implementation.

Description

technical field [0001] The invention relates to a method for stabilizing sulfide-removed arsenic slag, and belongs to the technical field of solidification safety treatment of hazardous solid waste. 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- 、Cu 2+ , Sb 3...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/08C04B18/04
CPCY02W30/91C04B28/085C04B18/0472C04B18/0481C04B2111/00767C04B22/124C04B40/024
Inventor 夏举佩杨劲罗中秋
Owner KUNMING UNIV OF SCI & TECH
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