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A kind of bismuth tellurite flotation inhibitor and its preparation method and application

A technology of inhibitor and bismuth tellurite, which is applied in flotation, solid separation, etc., can solve the problems of negative impact on useful mineral selection indicators, many process steps, cumbersome operation, etc., achieve good selectivity effect, wide source of raw materials, Prepare simple effects

Active Publication Date: 2020-11-03
INST OF MULTIPURPOSE UTILIZATION OF MINERAL RESOURCES CHINESE ACAD OF GEOLOGICAL SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the ore contains a large amount of pyrrhotite with similar floatability to bismuthite, and there are generally guest crystal minerals of various shapes such as small milk droplets, worms, images or thin strips in bismuthite, and these guest crystals The crystalline minerals are mainly pyrrhotite, and the guest crystal minerals are difficult to dissociate from the base mineral-bismuth tellurite even if they are finely ground. The slime will cover the surface of bismuth tellurite, which makes it difficult to sort bismuth tellurite in my country, especially low-grade bismuth tellurite, and the utilization rate is low
[0004] For a long time, around the classification and separation of pyrrhotite, domestic and foreign universities, scientific research institutes, and engineering and technical personnel in factories and mines have done a lot of research work, such as Chinese invention patents CN105214837A and CN105289834B respectively disclose a Magnetic-flotation combined process to separate pyrrhotite, Chinese invention patent CN102319618A discloses a floating-heavy combined process to separate pyrrhotite, Chinese invention patent CN101745467A discloses a primary potential control flotation process to separate magnetite Iron ore, although the above process can play the role of separating pyrrhotite, but the process steps are many, the operation is cumbersome, the industrial application is difficult, and it will bring a relatively large negative impact on the selection index of useful minerals
In the aspect of pyrrhotite flotation depressant research, publication number is that the Canadian patent document of CA2082831 discloses a kind of pyrrhotite combined depressant-calcium polysulfide plus polyamine, and it is in flotation containing pyrrhotite, yellow Copper ore, sphalerite and galena ore can effectively selectively suppress pyrrhotite; Chinese invention patent CN102896050A discloses a combined inhibitor for pyrrhotite flotation: sodium carbonate, coke Sodium sulfite and triethylenetetramine; Chinese invention patent CN101455996A discloses a kind of flotation inhibitor of monoclinic pyrrhotite: acetic acid and sodium acetate, when these inhibitors are applied to the flotation separation of copper-lead-zinc polymetallic ore, the effect Better, but practice has proved that when used for pyrrhotite flotation separation in tellurite, the effect is poor
And existing bismuth tellurite flotation inhibitors such as sodium sulfite, water glass, lime, sodium hexametaphosphate and sodium carbonate etc., it is mainly for the suppression of gangue mineral-dolomite, and part inhibitor such as lime can be to the inhibition of magnetite Iron ore can be suppressed, but its selective suppression ability is poor, and the dosage is large, which is easy to cause pipeline blockage and equipment corrosion. agent, so as to achieve high recovery and high-grade bismuth tellurium concentrate through a single flotation process

Method used

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  • A kind of bismuth tellurite flotation inhibitor and its preparation method and application

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] 1) by weight, take by weighing 10 parts of N-aminoethylpiperazine and 30 parts of water glass with a modulus of 2.8;

[0040] 2) Add the N-aminoethylpiperazine taken into the water glass, and stir until uniform, and let it stand for 10 minutes;

[0041] 3) In parts by weight, weigh 10 parts of sodium m-nitrophenylacetate and 5000 parts of water, slowly and evenly add sodium m-nitrophenylacetate into the water while stirring continuously to make it fully dissolve, and then add the obtained product in step 2). The mixture of N-aminoethylpiperazine and water glass was stirred for 5 minutes to obtain an inhibitor solution with a mass concentration of 1%.

Embodiment 2

[0043] 1) In parts by weight, take 5 parts of piperazine-2-carboxamide and 15 parts of water glass with a modulus of 3.2;

[0044] 2) Add the obtained piperazine-2-carboxamide into water glass, stir until uniform, and let stand for 10 minutes;

[0045] 3) In parts by weight, weigh 10 parts of sodium m-nitrophenylacetate and 3750 parts of water, slowly and evenly add sodium m-nitrophenylacetate into the water while stirring continuously to make it fully dissolve, and then add the obtained product in step 2) The mixture of piperazine-2-carboxamide and water glass was stirred for 5 minutes to obtain an inhibitor solution with a mass concentration of 0.8%.

Embodiment 3

[0047] 1) In parts by weight, take 4 parts of piperazine-1-carboxylic acid dimethylamine and 12 parts of water glass with a modulus of 3.0;

[0048] 2) Add the piperazine-1-carboxylic acid dimethylamine into the water glass, stir until uniform, and let stand for 10 minutes;

[0049] 3) In parts by weight, weigh 15 parts of sodium m-nitrophenylacetate and 6200 parts of water, slowly and evenly add sodium m-nitrophenylacetate into the water while stirring continuously to make it fully dissolve, and then add the obtained product in step 2) The mixture of piperazine-1-carboxylic acid dimethylamine and water glass was stirred for 5 minutes to obtain an inhibitor solution with a mass concentration of 0.5%.

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Abstract

The invention provides a bismuth tellurite flotation inhibitor, which comprises, in parts by weight: 2-10 parts of piperazine compounds, 5-20 parts of sodium m-nitrophenylacetate, and 6-30 parts of water glass ; The piperazine compound is one of N-aminoethylpiperazine, piperazine-2-formamide and piperazine-1-carboxylic acid dimethylamine, and the modulus of the water glass is 2.8~3.2 The present invention also provides a method for preparing the above-mentioned inhibitor; the present invention also provides the application of the above-mentioned inhibitor to synchronously inhibit pyrrhotite and dolomite in the flotation process of bismuth tellurite.

Description

technical field [0001] The invention belongs to the technical field of mineral processing, and in particular relates to a bismuth tellurite flotation inhibitor and a preparation method and application thereof, and is particularly suitable for flotation recovery of low-grade bismuth tellurite whose tellurium grade is lower than 0.5 percent in raw ore. Background technique [0002] Tellurium is a rare element, known as the vitamin of modern industry, national defense and cutting-edge technology, and is the supporting material of contemporary high-tech new materials. Tellurium and its compounds are widely used in metallurgy, rubber, petroleum, electronic appliances, glass ceramics, aerospace, military, medicine and other industries and fields. The output of metal tellurium in my country is far from meeting the needs of industrial development, and a large amount of it needs to be imported from abroad every year. [0003] my country's tellurium bismuth ore is the world's first t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03D1/018B03D101/06B03D103/02
CPCB03D1/018B03D2201/06B03D2203/02
Inventor 邓伟王昌良廖祥文陈炳炎饶系英
Owner INST OF MULTIPURPOSE UTILIZATION OF MINERAL RESOURCES CHINESE ACAD OF GEOLOGICAL SCI