Mineral oxidation acid production inhibition method based on sulfide mineral surface in-situ rapid film formation

A technology of mineral and acid production, which is applied in the removal of solid waste, coating, primer, etc., can solve the problems of complex operating conditions and general passivation effect, and achieve the effect of good film formation, high cost performance and low pollution

Active Publication Date: 2021-10-22
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the operating conditions of this method are relatively complicated, and the passivation effect is general

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1) 50g L -1 Sodium dodecyl sulfonate, 120g L -1 Limestone powder and 70g L -1 Acrylic copolymer (purchased from Beijing Hongya Jianye Building Materials Co., Ltd.) is mixed in accordance with 1: 1: 1 volume ratio, and the pH is adjusted to 7.6 to obtain a first mixed solution.

[0024] (2) The resulting first mixed solution was stirred at 40 ° C and 180 rpm Raping at 40 ° C and 180 rpm Rapidity, and the volume ratio of the tap water was diluted with a volume ratio of 1: 5 to obtain a first hydrophobic membrane solution. The first hydrophobic membrane solution was then added to the coating spray device.

[0025] Here, the first hydrophobic membrane solution is diluted based on cost control and spraying film formation effect. Of course, it is also advantageous to spray operation after dilution.

[0026] (3) Using the coating spray device, the first hydrophobic membrane solution is sprayed in a yellow iron mine surface having a particle size of 40 μm, and the spray speed is 6...

Embodiment 2

[0032](1) 50g L -1 Dodecyl benzene sulfonate, 120g L -1 Limestone powder and 70g L -1 Acrylic copolymer (purchased from Beijing Hongya Jianye Building Materials Co., Ltd.) is mixed evenly in a volume ratio of 1: 0.2: 0.1, and the pH is adjusted to 6.9 to obtain the first mixed solution.

[0033] (2) The resulting first mixed solution was stirred at 40 ° C and 180 rpm Rapid speed for 30 min, and the tap water was diluted with a volume ratio of 1: 15 to obtain a first hydrophobic membrane solution. The first hydrophobic membrane solution was then added to the coating spray device.

[0034] (3) The first hydrophobic membrane solution is sprayed in a magnetic iron mine surface having a particle diameter of 1 cm by a coating spray device, and the spray speed is 25m. 2 / h, that is, the hydrophobic base film is first formed on the surface of the magnetic iron mine.

[0035] (4) Will concentration of 60g L -1 Epoorthyl dimethyltrial methyleneoxypropyl ammonium chloride (QAS) as a first a...

Embodiment 3

[0040] (1) 50g L -1 Sodium dodecyl sulfonate, 120g L -1 Limestone powder and 70g L -1 Acrylate copolymer (purchased from Beijing Hongya Jianye Building Materials Co., Ltd.) is mixed evenly according to 3: 2: 1, and the pH is adjusted to 8.0 to obtain the first mixed solution.

[0041] (2) The resulting first mixed solution was stirred under the conditions of 40 ° C and 180 rpm Rapid speed for 30 min, and the tap water was diluted with a volume ratio of 1: 1 to obtain a first hydrophobic membrane solution. The first hydrophobic membrane solution was then added to the coating spray device.

[0042] (3) The first hydrophobic membrane solution is sprayed with a first hydrophobic membrane solution in a arsenic yellow iron mine surface having a particle size of 1 mm, and the spray speed is 150m. 2 / h, first form a hydrophobic base film on the surface of arsenic iron mine.

[0043] (4) Will concentration of 60g L -1 N, N-dimethyl-N-dodecyl ammonium trimethoxysilane - DDATAC as the first...

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Abstract

The invention discloses a mineral oxidation acid production inhibition method based on sulfide mineral surface in-situ rapid film formation. The method comprises the following steps of sequentially and uniformly spraying a first hydrophobic film solution and a second hydrophobic film solution on the surface of a target sulfide mineral, so that a hydrophobic double-layer passivation film is formed on the surface of the target sulfide mineral in situ, and oxidation acid production of the target sulfide mineral is effectively inhibited. According to the method, the hydrophobic double-layer passivation film can be rapidly formed on the surface of the sulfide mineral such as pyrite, pyrrhotite and arsenopyrite in situ, contact between moisture, air and microorganisms and the surface of the sulfide mineral is avoided through the isolation effect of the hydrophobic double-layer film, and therefore the oxidation effect of the sulfide mineral under the effects of the microorganisms, the air, the moisture and the like is inhibited; and the acid mine wastewater can be eradicated from the source. According to the method, the hydrophobic double-layer passivation film can be rapidly generated in situ in the environment of a tailing pond and a tailing slag storage yard, generation of the acid mine wastewater is eradicated from the source, and the method has important significance on tailing treatment and environmental protection.

Description

Technical field [0001] The present invention relates to a mineral oxidative acid suppression method based on a rapid film formation of a vulcanized mineral surface, belonging to the technical field of tailings governance. Background technique [0002] Tailings (AMD) produced by acid mine wastewater (AMD) is produced under natural conditions during natural conditions. Most of China's metal mine is the native sulfide deposit (yellow iron ore, magnetic iron ore, arsenic, and 矿 矿, etc.), and a large amount of abandoned minerals and tailings are weathering, leaching, etc., which is easy to form acidic mine wastewater. This is because the vulcanized mineral is exposed to the environment, which is extremely easily oxidized under the action of water, oxygen and microorganism. The acid mine wastewater pH is extremely low, sulfate and heavy metal ions (CD, Cu, Mn, Pb, Zn, AS) have a high content, causing serious damage to the surrounding environment, and the problem of acidic mine wastewat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09B3/00C09D133/08C09D7/61C09D7/63C09D5/00C09D153/02C09D7/62
CPCB09B3/00C09D133/08C09D7/61C09D7/63C09D5/002C09D153/025C09D7/62C08K2003/265C08K5/42C08K3/26C08L33/08C08K9/04C08K3/36
Inventor 王潇男郑洁琰范丽俊张道勇潘响亮
Owner ZHEJIANG UNIV OF TECH
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