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A kind of solidification/stabilization method for high-concentration water-soluble manganese in manganese slag

A stabilization treatment, water-soluble manganese technology, applied in the direction of solid waste removal, etc., can solve the problem of not considering the impact, and achieve the effect of reducing the leaching concentration and being conducive to environmental protection

Inactive Publication Date: 2016-05-18
CHINESE RES ACAD OF ENVIRONMENTAL SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Similarly, this document does not consider the impact of the use of quicklime on the pH of the solid waste itself

Method used

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  • A kind of solidification/stabilization method for high-concentration water-soluble manganese in manganese slag
  • A kind of solidification/stabilization method for high-concentration water-soluble manganese in manganese slag
  • A kind of solidification/stabilization method for high-concentration water-soluble manganese in manganese slag

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Fresh electrolytic manganese slag 20kg

[0034] Add water to the active silica to form an active silica dispersion, the amount of active silica is 1% of the manganese slag, and the amount of water is 1% of the manganese slag; add active silica dispersion to the manganese slag , stirred for 1 minute; added magnesium oxide, stirred for 30 minutes, the amount of magnesium oxide was 5% of the manganese slag; after mixing evenly, aged for 14 days. According to the GB5086.1-1997 solid waste leaching method, the manganese concentration and pH in the leachate were determined by the inversion method.

Embodiment 2

[0036] Fresh electrolytic manganese slag 20kg

[0037]Add water to the active silica to form an active silica dispersion, the amount of active silica is 5% of the manganese slag, and the amount of water is 1% of the manganese slag; add active silica dispersion to the manganese slag , stirred for 3 minutes; added magnesium oxide, stirred for 40 minutes, the amount of magnesium oxide was 10% of the manganese slag; after mixing evenly, aged for 7 days. According to the GB5086.1-1997 solid waste leaching method, the manganese concentration and pH in the leachate were determined by the inversion method.

Embodiment 3

[0039] Old electrolytic manganese slag 20kg

[0040] Add water to the active silica to form an active silica dispersion, the amount of active silica is 3% of the manganese slag, and the amount of water is 5% of the manganese slag; add active silica dispersion to the manganese slag , stirred for 2 minutes; added magnesium oxide, stirred for 35 minutes, the amount of magnesium oxide was 9% of the manganese slag; after mixing evenly, let it stand for 10 days. According to the GB5086.1-1997 solid waste leaching method, the manganese concentration and pH in the leachate were determined by the inversion method.

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Abstract

The invention discloses a method for performing solidification / stabilizing treatment on high-concentration water-soluble manganese in manganese residues. The method comprises the following steps: (1) dispersing active silica with water, thereby forming a mixed solution; (2) adding the mixed solution into the manganese residues, and stirring for 1-3 minutes; (3) adding magnesium oxide, and stirring for 30-40 minutes; and (4) aging for 7-14 days, wherein the amount of the active silica is 1-5 percent of the weight of the manganese residues. According to the method for performing solidification / stabilizing treatment on high-concentration water-soluble manganese in the waste residues provided by the invention, the manganese leaching concentration can be reduced, and the pH value of the treated manganese residues can be kept in a range from 6 to 9.

Description

technical field [0001] The invention relates to a solid waste treatment method, in particular to a solidification / stabilization treatment method for high-concentration water-soluble manganese in waste residue. Background technique [0002] The electrolytic manganese industry is a typical "three highs and one low" industry of "high investment, high consumption, high pollution, and low benefit". With its rapid development, the problems of resource shortage and environmental pollution have become increasingly prominent. Among them, electrolytic manganese metal The pollution of waste slag (also known as electrolytic manganese slag, or manganese slag for short) is particularly prominent. In recent years, due to the continuous reduction of ore grade, it has dropped from more than 20% to 14-16%. Every 1t of electrolytic metal produced Manganese has risen from 6-8t of waste slag to 10-12t of waste slag, and the waste slag contains a variety of pollutants, among which manganese has t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B09B3/00
Inventor 但智钢段宁杜兵高武斌王志增王辉峰张海燕史菲菲
Owner CHINESE RES ACAD OF ENVIRONMENTAL SCI
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