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Pollutional acid sludge harmless treatment method

A harmless treatment and technology of polluted acid slag, applied in the field of environmental protection, can solve the problems of polluted acid slag polluting the environment and achieve low cost, obvious economic and environmental benefits, and easy project implementation

Active Publication Date: 2013-12-18
CHENZHOU CITY JINGUI SILVER IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for harmless treatment of polluted acid slag, so as to solve the problem of pollution of the environment and comprehensive utilization of polluted acid slag; use industrial waste slag as solidification material to achieve waste treatment with simple process and low production cost , safe and effective, and have obvious economic and environmental benefits

Method used

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  • Pollutional acid sludge harmless treatment method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Step 1. Drying: Put the dirty acid residue in an oven for drying, and the temperature is controlled at 50°C;

[0022] Step 2: Ball milling: Ball mill the fly ash for 10 minutes in advance, and then mix it with the dirty acid slag and ordinary Portland cement for 15 minutes. The addition amount of ordinary Portland cement and fly ash is 50% of the quality of the dirty acid slag. And 20%;

[0023] Step 3. Stirring: Add the ball-milled materials to the mixer, add river sand and slag to it, slowly add water and stir, add the additive triethanolamine while adding water, stir for 10 minutes, control the water ratio to 0.3, and the amount of river sand and slag added Both are 10% of the quality of dirty acid residue, and the added amount of triethanolamine is 0.03% of the quality of dirty acid residue;

[0024] Step 4. Pouring and forming: Put the mixed materials into the standard brick mold, and release the mold after holding the pressure with a press to obtain a brick-shaped solid...

Embodiment 2

[0028] Step 1. Drying: Put the dirty acid residue in an oven for drying, and the temperature is controlled at 60°C;

[0029] Step 2: Ball milling: Ball mill the fly ash for 10 minutes in advance, then mix it with the dirty acid slag and ordinary Portland cement for 20 minutes, and control the addition of ordinary Portland cement and fly ash to 50% of the quality of the dirty acid slag. And 30%;

[0030] Step 3. Stirring: Add the ball-milled materials to the mixer, add river sand and slag to it, slowly add water and stir, add the additive triethanolamine while adding water, stir for 10 minutes, control the moisture ratio to 0.4, and the amount of river sand and slag added It is 20% and 10% of the quality of dirty acid residue, and the added amount of triethanolamine is 0.04% of the quality of dirty acid residue;

[0031] Step 4. Pouring and forming: Put the mixed materials into the standard brick mold, and release the mold after holding the pressure with a press to obtain a brick-sha...

Embodiment 3

[0035] Step 1. Drying: Put the dirty acid residue in an oven for drying, and the temperature is controlled at 60°C;

[0036] Step 2: Ball milling: Ball mill the fly ash for 15 minutes in advance, then mix it with the dirty acid slag and ordinary Portland cement for 20 minutes, and control the addition of ordinary Portland cement and fly ash to 40% of the quality of the dirty acid slag. And 20%;

[0037] Step 3. Stirring: Add the ball-milled material to the mixer, add river sand and slag to it, slowly add water and stir, add the additive triethanolamine while adding water, stir for 15 minutes, control the moisture ratio of 0.4, the amount of river sand and slag added Both are 20% of the quality of dirty acid residue, and the added amount of triethanolamine is 0.05% of the quality of dirty acid residue;

[0038] Step 4. Pouring and forming: Put the mixed materials into the standard brick mold, and release the mold after holding the pressure with a press to obtain a brick-shaped solidi...

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Abstract

The invention relates to a pollutional acid sludge harmless treatment method, and belongs to the technical field of environmental protection. Dried pollutional acid sludge and a solidification material composed of common Portland cement, coal ash, slag and river sand are subjected to mixed ball-milling, stirring, casting molding and maintenance in cooperation of additives and water to form a cement solidified body which is good in gelatinization state and low in arsenic leaching concentration. The pollutional acid sludge harmless treatment method has the advantages of being simple in process, low in production cost, safe and effective; industrial waste residue is used as the solidification material to achieve the purpose of treating waste with waste, and therefore the pollutional acid sludge harmless treatment method has obvious economic benefit and environmental benefit.

Description

Technical field [0001] The invention relates to a method for the harmless treatment of dirty acid residue and belongs to the technical field of environmental protection. technical background [0002] The sewage acid residue of the present invention is derived from the neutralization sludge of the sewage purification treatment system of non-ferrous metal smelting flue gas, and the by-product of zinc hydrometallurgy resource recovery, which contains arsenic, mercury, cadmium, lead, zinc, etc. The heavy metal toxic substances that are the most serious to humans and their biological hazards, how to properly handle the dirty acid residue has become the focus of the industry. At present, the stable solidification methods commonly used in the treatment of acid residue at home and abroad are: cement solidification method, organic polymer solidification method, plastic material solidification method and melting solidification method. [0003] Cement curing is one of the main methods for de...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/08C04B7/26C04B18/04
CPCY02P40/10Y02W30/91
Inventor 柴承平黄海飞谢兆凤刘万里覃小龙谭霖
Owner CHENZHOU CITY JINGUI SILVER IND CO LTD
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