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Harmless treatment method for barium residues and arsenic residues

A technology of harmless treatment and arsenic slag, which is applied in the removal of solid waste, etc., can solve the problems of environmental hazards, high cost, and large dosage of chemicals, and achieve the effects of avoiding environmental problems, reducing capacity, and reducing the dosage of chemicals.

Inactive Publication Date: 2020-09-04
中化环境修复(上海)有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the defects in the prior art that the harmless treatment of barium slag and arsenic slag is carried out separately, the amount of medicament is large, the cost is high, and it is easy to cause further environmental hazards, thereby providing a barium slag Harmless treatment method of slag and arsenic slag

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] This embodiment provides a method for harmless treatment of barium slag and arsenic-alkali slag. The barium slag comes from a barium chloride production enterprise, and the barite method and witherite method are used to produce the residue after barium chloride is processed. Physical and chemical properties testing, the test results are as follows: barium content 32900mg / kg, barium leaching concentration 3281mg / L, pH=9.7; the arsenic-alkali slag comes from the neutralization slag produced after the treatment of arsenic-containing acidic wastewater in a factory, and its physical and chemical properties were tested , the test results are as follows: arsenic content 109000mg / kg, arsenic leaching concentration 533mg / L, pH=10.1.

[0031] The concrete steps of this method are as follows:

[0032] (1) Air-dry the barium slag and arsenic-alkali slag naturally, sieve and crush them, so that the particle size of the barium slag and arsenic-alkali slag is less than 1 cm;

[0033]...

Embodiment 2

[0040]This embodiment provides a method for harmless treatment of barium slag and arsenic-alkali slag. The sources of barium slag and arsenic-alkali slag are the same as those in Embodiment 1.

[0041] The concrete steps of this method are as follows:

[0042] (1) Air-dry the barium slag and arsenic-alkali slag naturally, sieve and crush them, so that the particle size of the barium slag and arsenic-alkali slag is less than 1 cm;

[0043] (2) 6.6 kg of barium slag and 10 kg of arsenic-alkali slag after the treatment of step (1) are fully mixed (the mol ratio of soluble barium and soluble arsenic is 3.2:2);

[0044] (3) Add the hydrogen peroxide of 400mL mass concentration 15% in the mixture of barium slag and arsenic-alkali slag that step (2) obtains, stir, add the disodium hydrogen phosphate buffer solution 100mL of the sulfuric acid 80mL of 0.1mol / L and 1mol / L After adding 0.083kg of ferric sulfate (0.5% of the total mass of barium slag and arsenic-alkali slag), continue to...

Embodiment 3

[0050] This embodiment provides a method for harmless treatment of barium slag and arsenic sulfide slag. The barium slag comes from a barium slag storage site to be treated, and its physical and chemical properties are tested. The test results are as follows: barium content 66800mg / kg , the barium leaching concentration is 2580mg / L, pH=10.5; the arsenic sulfide slag comes from the arsenic filter cake produced in the process of arsenic precipitation in the wastewater of a copper smelting enterprise. Concentration 7900mg / L, pH=1.6.

[0051] The concrete steps of this method are as follows:

[0052] (1) Naturally air-dry the barium slag and arsenic sulfide slag, sieve and crush them, so that the particle size of the barium slag and arsenic sulfide slag is less than 1 cm;

[0053] (2) 50.32 kg of barium slag and 5 kg of arsenic sulfide slag after step (1) are fully mixed (the mol ratio of soluble barium and soluble arsenic is 3.1:2);

[0054] (3) to the mixture of barium slag an...

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Abstract

The invention provides a harmless treatment method for barium residues and arsenic residues. The harmless treatment method comprises the steps that the barium residues, the arsenic residues and a stabilized agentia are mixed to obtain a waste residue mixture for piling and maintaining. According to the harmless treatment method, the barium residues and the arsenic residues are subjected to harmless treatment at the same time, the characters of the two kinds of hazardous waste are fully utilized, soluble barium in the barium residues and soluble arsenic in the arsenic residues react with each other, indissolvable arsenic acid is generated, and therefore the aim of stabilizing the barium residues and the arsenic residues is achieved, and the effect of treating waste with waste is achieved; and the agentia dosage and capacity increase in the harmless treatment process of the barium residues and the arsenic residues can be reduced, the cost of the harmless treatment is greatly reduced, other environment problems caused by the large use amount of the stabilizing agentia are avoided, and the cost advantage of treating the barium residues and the arsenic residues with high leaching concentration is more obvious.

Description

technical field [0001] The invention relates to the field of harmless treatment of hazardous waste, in particular to a method for harmless treatment of barium slag and arsenic slag. Background technique [0002] Barium slag is mainly the slag produced in the production process of barium compounds such as barium chloride (excluding barium sulfate), dust collected by dust collection (removal) devices, reaction residues, and wastewater treatment sludge. my country is rich in barium ore resources. It is predicted that the total reserves of resources will exceed 1 billion tons, and the grade of barium ore is relatively high. The reserves and output of barium ore currently rank first in the world. Taking Guizhou as an example, Guizhou Province is the most important barium salt production base in my country, with an annual production capacity of 500,000-700,000 tons of barium carbonate and an annual discharge of about 1.2 million tons of barium slag. Arsenic slag often comes from ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09B1/00B09B3/00B09B5/00A62D3/30A62D101/40A62D101/43
CPCA62D3/30A62D2101/40A62D2101/43B09B1/004B09B3/00B09B5/00
Inventor 车轶夫李绍华罗远恒高永利边杨子陆垚
Owner 中化环境修复(上海)有限公司
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