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A kind of molybdenum-lead separation inhibitor and its preparation method and application

An inhibitor and reaction technology, applied in solid separation, flotation, etc., can solve problems such as difficult separation of molybdenite and galena, difficulty in comprehensive molybdenum recycling, human and environmental hazards, and improve comprehensive recovery Utilization rate, low toxicity, pollution reduction effect

Active Publication Date: 2019-05-14
BEIJING GENERAL RES INST OF MINING & METALLURGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] For lead-containing molybdenum metal sulfide ores, due to the good floatability of galena, it is easy to be enriched simultaneously with molybdenite, so the molybdenum concentrate produced by flotation often contains high lead; It has caused difficulties and reduced the recovery rate of molybdenum, and lead oxides (such as yellow lead and lead red, etc.) that seriously pollute the environment will be produced in the subsequent molybdenum smelting process. Therefore, the efficient development and utilization of molybdenum resources urgently need lead-reducing agents and molybdenum lead separation process
[0004] In the prior art, it is difficult to separate molybdenite and galena with ordinary lead inhibitors because galena is easy to over-grind and absorb a large amount of chemicals.
At present, the most effective lead inhibitors are dichromate and phosphonox, but both of these two agents are highly toxic and are likely to cause harm to the human body and the environment

Method used

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  • A kind of molybdenum-lead separation inhibitor and its preparation method and application

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Experimental program
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Effect test

Embodiment approach

[0033] (1) The described hydrophilic group can be the hydrophilic group in the prior art such as hydroxyl, carboxyl, sulfonic acid group; The described water-soluble organic substance that contains a plurality of hydrophilic groups can be tannic acid, One or more of gallic acid, pyrogallic acid, glucose, gluconic acid, chitosan, dextrin, sorbitol, and glycerin. In practical application, the water-soluble organic substance containing multiple hydrophilic groups is preferably dissolved in water to make a matrix aqueous solution with an organic substance mass concentration of 10-40%, and then reacts with carbon disulfide, which not only can make the prepared The molybdenum-lead separation inhibitor has better inhibition effect and can improve its flotation efficiency.

[0034] (2) described alkali preferably adopts strong base, for example: can adopt at least one in sodium hydroxide, potassium hydroxide, sodium carbonate, sodium bicarbonate, potassium carbonate or potassium bicar...

Embodiment 1

[0050] Dissolve 17.01g of tannic acid in 50ml of water, and add 13.5g of a mass concentration of 30% sodium hydroxide solution, stir to make it fully dissolved, then slowly add 9.1g of carbon disulfide dropwise, and control the reaction temperature to be 45 to 50°C. The time is 5 hours, so that an orange-red solution with a mass concentration of 30-35% is prepared, which is the molybdenum-lead separation inhibitor provided in Example 1 of the present invention.

[0051] Utilize the molybdenum-lead separation inhibitor provided in the embodiment of the present invention 1 to carry out the molybdenum-lead mixed concentrate separation test: the raw material is the molybdenum-lead mixed concentrate obtained after the molybdenum-lead mixed flotation operation of a certain lead-containing molybdenum metal sulfide ore. The grade of molybdenum in the lead mixed concentrate is 10.90%, and the grade of lead is 3.25%. After going through the "one rough, one sweep and five fine" flotation...

Embodiment 2

[0054] Dissolve 17.01g of gallic acid in 50ml of water, add 13.0g of 30% sodium hydroxide solution, stir to make it fully dissolved, then slowly add 8.0g of carbon disulfide dropwise, control the reaction temperature to 40-50°C, and the reaction time For 4 hours, an orange-red solution with a mass concentration of about 30% was prepared, which was the molybdenum-lead separation inhibitor provided in Example 2 of the present invention.

[0055] Utilize the molybdenum-lead separation inhibitor provided by the embodiment of the present invention 2 to carry out the molybdenum-lead mixed concentrate separation test: the raw material is the molybdenum-lead mixed concentrate obtained after the molybdenum-lead mixed flotation operation of a certain lead-containing molybdenum metal sulfide ore. The grade of molybdenum in the lead mixed concentrate is 19.45%, and the grade of lead is 0.12%. After the flotation process of "one coarse, one sweep and five fine" described in the above techn...

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Abstract

The invention discloses a molybdenum-lead separation inhibitor and a preparation method and application thereof. The preparation method of the molybdenum-lead separation inhibitor includes the following step that water-soluble organic matter containing a plurality of hydrophilic groups and carbon disulfide react at the presence of alkali for 1-12 hours at the temperature of 30-80 DEG C, so that the molybdenum-lead separation inhibitor is prepared, wherein the use quantity of the carbon disulfide used for each mole of the water-soluble organic matter containing the multiple hydrophilic groups is greater than zero but smaller than or equal to 1 mole; and the mole ratio of the alkali to the carbon disulfide is 1-2:1. The molybdenum-lead separation inhibitor can be used for molybdenum-lead separation flotation or separation flotation of copper-molybdenum-lead polymetallic ore. Effective molybdenum-lead separation can be achieved, the comprehensive recovery rate of molybdenum is increased, the content of lead in low-molybdenum concentrate is reduced to the maximum extent, and pollution of lead to the environment is reduced in the smelting process. In addition, raw materials are easy to obtain, the preparation technology is simple, and the molybdenum-lead separation inhibitor is safe in use and low in toxicity and cannot cause harm to the human body and the environment.

Description

technical field [0001] The invention relates to the technical field of molybdenum-lead ore flotation separation, in particular to a molybdenum-lead separation inhibitor, a preparation method and application thereof. Background technique [0002] Molybdenum is a rare metal with high strength, high temperature resistance, wear resistance and corrosion resistance. It is widely used in metallurgy, machinery, military industry, aerospace, chemical industry, electric light source and other fields. my country is rich in molybdenum resource reserves, but there are few single molybdenum ores, which are often associated with other polymetallic sulfide ores, and lead-containing molybdenum metal sulfide ores are one of them. [0003] For lead-containing molybdenum metal sulfide ores, due to the good floatability of galena, it is easy to be enriched simultaneously with molybdenite, so the molybdenum concentrate produced by flotation often contains high lead; It has caused difficulties a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03D1/012B03D1/02B03D1/08B03D101/06B03D103/04
CPCB03D1/012B03D1/02B03D1/082B03D2201/06B03D2203/04
Inventor 张行荣刘崇峻宋磊朱阳戈尚衍波郑桂兵
Owner BEIJING GENERAL RES INST OF MINING & METALLURGY