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Combined inhibitor for separating pyrite from complex molybdenite and separation method thereof

A technology combining inhibitors and separation methods, applied in solid separation, flotation, etc., can solve problems such as unfavorable wood indicators, corrosion equipment, resource waste of molybdenite, etc., achieve good selectivity and inhibition ability, and improve comprehensive utilization Spatial, efficient separation effect

Pending Publication Date: 2022-05-13
金堆城钼业汝阳有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the most commonly used pyrite inhibitor in industrial applications is the lime method; this method has good selectivity in separating pyrite and other sulfide ores, but contains a large amount of calcium ions in lime, and a large number of studies have shown that lime has a strong Molybdenite has a strong inhibitory effect, so it is not conducive to the further improvement of the wood index, and will cause a waste of molybdenite resources; in addition, there are many problems in the industrial application of a large amount of lime, that is, it is easy to scale and cause pipeline blockage , and high alkalinity will corrode the equipment; in addition, this method will also cause a high pH value of the backwater of the tailings pond, and a high pH value is not conducive to the flotation of molybdenite

Method used

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  • Combined inhibitor for separating pyrite from complex molybdenite and separation method thereof
  • Combined inhibitor for separating pyrite from complex molybdenite and separation method thereof
  • Combined inhibitor for separating pyrite from complex molybdenite and separation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The present invention separates molybdenite and pyrite from the No. 1 Mineral Processing Plant of Jinduicheng Molybdenum Industry Ruyang Co., Ltd. The -200 mesh in the raw ore accounts for about 53%, of which the grade of molybdenum in the raw ore is about 0.115%, and the grade of Fe is about 4.83%. , the chemical residues on the mineral surface of the selected section make the separation more difficult.

[0034] Grind the raw molybdenite to obtain pulp with a fineness of -200 mesh accounting for 53%. Add 100g / t combined inhibitor, 100g / t collector kerosene and 30g / t starting The foaming agent terpineol is used for stirring; during the selection, the pre-selected concentrate is ground to obtain a pulp with a fineness of -400 mesh accounting for 95%; the obtained pre-selected concentrate is subjected to four selections and two In the second fine sweeping process, combined inhibitors need to be added for stirring in each refining process. In the first refining process, i...

Embodiment 2

[0061] The present invention is used to separate molybdenite and pyrite from the No. 1 Mineral Processing Plant of Jinduicheng Molybdenum Industry Ruyang Co., Ltd. The -200 mesh in the raw ore accounts for about 53%, of which the molybdenum grade in the raw ore is about 0.121%, and the Fe grade in the raw ore is about 4.96%.

[0062] Grinding and flotation steps are the same as in Example 1, and the combined depressant consists of 1.0wt% polyaspartic acid aqueous solution, 6.0wt% calcium hypochlorite aqueous solution, and 6.0wt% sodium humate aqueous solution in a mass ratio of 3:1:1 mixed; adding 100g / t of combined inhibitors in the examples refers to adding 100g of combined inhibitors to 1 ton of raw ore; as shown in Table 1 below, the final Fe grade is 3.25 %, the recovery rate is 0.14%, the Mo grade is 47.13%, and the recovery rate is the final molybdenum concentrate of 85.49%.

[0063] The test result of table 6 flotation separation

[0064]

Embodiment 3

[0066] The present invention is used to separate molybdenite and pyrite from the No. 1 Mineral Processing Plant of Jinduicheng Molybdenum Industry Ruyang Co., Ltd. The -200 mesh in the raw ore accounts for about 53%, of which the molybdenum grade in the raw ore is about 0.115%, and the Fe grade in the raw ore is about 4.89%.

[0067] Grinding and flotation steps are the same as in Example 1, and the combined depressant consists of 0.7wt% polyaspartic acid aqueous solution, 5.0wt% calcium hypochlorite aqueous solution, and 4.0wt% sodium humate aqueous solution in a mass ratio of 3:1:1 mixed; adding 100g / t of combined inhibitors in the examples refers to adding 100g of combined inhibitors to 1 ton of raw ore; as shown in Table 7 below, the final Fe grade is 3.74 %, the recovery rate is 0.16%, the Mo grade is 46.98%, and the recovery rate is the final molybdenum concentrate of 85.50%.

[0068] The test result of table 7 flotation separation

[0069]

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Abstract

The invention discloses a combined inhibitor for separating pyrite from complex molybdenite and a separation method of the combined inhibitor, and relates to the technical field of mineral processing, the combined inhibitor comprises polyaspartic acid, calcium hypochlorite and sodium humate according to the mass ratio of (1-3): (3-6): (3-6); the combined inhibitor is added by respectively preparing the components into aqueous solutions, wherein the mass concentration of the polyaspartic acid aqueous solution is 0.5-1.0%; the mass concentration of the calcium hypochlorite aqueous solution is 3.0-6.0%; the mass concentration of the sodium humate aqueous solution is 3.0-6.0%; the adding mass ratio of the three aqueous solutions is (2-3): 1: 1; the combined inhibitor is applied to the ore grinding and flotation process, efficient separation of molybdenite and pyrite is achieved, and the problems that a traditional lime method influences the recovery rate of molybdenite and a cyanide method has huge harm to the ecological environment are solved.

Description

technical field [0001] The invention relates to the technical field of mineral processing, in particular to a combined inhibitor for separating pyrite in complex molybdenite and a separation method thereof. Background technique [0002] It is well known that pyrite is one of the main minerals affecting polymetallic sulfide ores, usually associated with useful minerals such as chalcopyrite, galena and sphalerite, but in some cases it is also associated with molybdenite, and It has good floatability; therefore, the inhibition of pyrite with better floatability in molybdenite plays a vital role in improving the grade and recovery rate of molybdenite. In polymetallic sulfide ores, pyrite is generally suppressed first, and target minerals such as molybdenite are preferentially floated, and mineral ions will inevitably cause unnecessary activation of pyrite. How to effectively suppress pyrite and improve the flotation index of molybdenite has become the primary problem in the flo...

Claims

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Application Information

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IPC IPC(8): B03D1/02B03D1/14
CPCB03D1/02B03D1/14
Inventor 姚伟朱海玲白建敏张庆鹏李苏玲叶益良李蒲州白晓卿
Owner 金堆城钼业汝阳有限责任公司
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