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A method for separating pyrite and arsenopyrite by using microbial flotation method

A technology for microorganisms and pyrite, applied in the fields of mineral processing and microorganisms, can solve problems such as separation difficulties, and achieve the effects of advanced method technology, effective separation and easy access.

Inactive Publication Date: 2016-06-15
有研资源环境技术研究院(北京)有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a method for making pyrite and arsenopyrite under the action of microorganisms, aiming at the very similar crystal structure and chemical properties of arsenopyrite and pyrite, which make the separation of the two very difficult. The surface physical and chemical properties of the two have different changes, so that the two can be effectively separated by using ordinary flotation separation methods

Method used

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  • A method for separating pyrite and arsenopyrite by using microbial flotation method

Examples

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Effect test

Embodiment 1

[0022] Example 1 The separation of pyrite and arsenopyrite under different microbial concentrations

[0023] Under the condition that the test water is deionized water and natural pH, 2.0g of artificial mixed ore mixed with pyrite and arsenopyrite at a mass ratio of 1:1 is taken, and it is cleaned by ultrasonic wave for 5 minutes, and then treated with bacterial solutions of different concentrations for 5 minutes. Then quickly transfer to the flotation cell, add the activator copper sulfate of 6mg / L, the collector of 7.6mg / L and the frother of 2.0mg / L and carry out flotation, investigate the impact of bacterial concentration on pyrite and arsenopyrite Influence of bioflotation separation effect. The relationship between the recovery rate of pyrite and arsenopyrite and the bacterial concentration is as follows figure 1 shown.

[0024] from figure 1 It can be seen that with the increase of the bacterial concentration, the recovery rates of pyrite and arsenopyrite are obviousl...

Embodiment 2

[0025] Example 2 Separation results of pyrite and arsenopyrite interacting with bacteria for different times

[0026] Under the condition that the test water is deionized water and natural pH, take 2.0g of artificial mixed ore mixed with pyrite and arsenopyrite in a mass ratio of 1:1, and then ultrasonically clean it for 5min, with a concentration of 5.0×10 7 Each / mL bacterial solution acts for different periods of time, and then quickly transferred to the flotation tank, adding 6mg / L activator copper sulfate, 7.6mg / L collector and 2.0mg / L foaming agent Flotation, to investigate the effect of bacterial action time on pyrite and arsenopyrite biological flotation separation effect. The relationship between the recovery rate of pyrite and arsenopyrite and the action time is as follows figure 2 shown.

[0027] from figure 2 It can be seen that with the prolongation of the bacterial action time, the recovery rates of pyrite and arsenopyrite are obviously decreasing, but in an ...

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Abstract

The invention provides a method for using a microbial flotation method to separate pyrites from arsenopyrites. The method comprises the steps of acting on the mixed ores including the pyrites and the arsenopyrites and a microbial solution; performing flotation separation on the mixed ores including the pyrites and the arsenopyrites acted with microbes; enabling the surfaces of the arsenopyrites to be hydrophilic due to the fact that the arsenopyrites are likely to be oxidized by the microbes, and enabling the arsenopyrites not to be floated in the process of flotation separation, enabling the surfaces of the pyrites to be kept in a hydrophobic state due to the fact that the pyrites and the microbes are acted for a longer time and the pyrites are unlikely to be oxidized in the same time, and floating the pyrites as floated froth products in the process of the flotation separation, thereby effectively separating the pyritse from the arsenopyrites. According to the method, the technology is advanced, the used microbes are likely to be obtained, and the environment can not be polluted.

Description

technical field [0001] The invention relates to a new method for separating pyrite and arsenopyrite by using a microbial flotation method, and belongs to the cross technical field of the field of microorganisms and the field of mineral processing. Background technique [0002] Arsenic is a sulfur-loving element, often associated with sulfide ores, and is one of the main impurity elements in non-ferrous metal smelting. Arsenic is also very harmful to the environment and human health. Therefore, arsenic removal from sulfide ores is an inevitable step in the dressing plant. Arsenic generally exists in the form of arsenopyrite (arsenopyrite), but due to the very similar crystal structures and chemical properties of arsenopyrite and pyrite, the separation of the two is very difficult. In general, the method that can effectively separate pyrite and arsenopyrite can also separate other sulfide ores and arsenopyrite. The separation of pyrite and arsenopyrite is one of the difficult ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03D1/02B08B3/12
Inventor 徐政杨丽梅李岩黄松涛
Owner 有研资源环境技术研究院(北京)有限公司
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