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A kind of modified chitosan inhibitor and its flotation separation method

A chitosan and inhibitor technology, applied in the field of molybdenum polymetallic sulfide mineral processing, can solve the problems of high toxicity of inorganic inhibitors, poor ore adaptability, poor inhibitory effect, etc., and achieve safe use, easy raw materials, and strong inhibitory power. Effect

Active Publication Date: 2021-05-25
BEIJING MINING & METALLURGICAL TECH GRP CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of this, the present invention aims to solve the problems of high toxicity of inorganic inhibitors in the prior art, refractory waste water treatment, serious environmental pollution, etc., and at the same time solve the technical problems of existing organic inhibitors such as poor adaptability, large dosage, and poor inhibitory effect. Insufficient, the invention provides a kind of modified chitosan inhibitor and flotation separation method thereof

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  • A kind of modified chitosan inhibitor and its flotation separation method
  • A kind of modified chitosan inhibitor and its flotation separation method
  • A kind of modified chitosan inhibitor and its flotation separation method

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Embodiment 1

[0030] Embodiment 1 of the present invention discloses a kind of modified chitosan inhibitor and flotation separation method thereof, and the technical scheme adopted is as follows:

[0031] Add 20mL of acetic acid into a 250mL three-necked bottle, then add 150mL of water, stir well and add 8.0g of chitosan in batches, then stir at 30°C until the chitosan is completely dissolved, and the solution in the three-necked bottle is transparent at this time state. After about 30 minutes, add 4.5 g of thiosemicarbazide (equivalent to 0.5 times the molar weight of the pyran ring), and continue stirring until all the reactants are dissolved, at which point the bottle becomes transparent again. Stirring was continued for 1 h, 1 mL of formaldehyde with a concentration of 40% was added dropwise into the three-necked flask, and the reaction was continued for 10 h under sufficient stirring, and the pH was adjusted with acid and alkali until the bottle was a transparent solution to obtain a m...

Embodiment 2

[0034] Embodiment 2 of the present invention discloses a modified chitosan inhibitor and a flotation separation method thereof, and the technical scheme adopted is as follows:

[0035] The molybdenum-lead polymetallic sulfide ore is subjected to mixed flotation to obtain a copper-molybdenum mixed concentrate; the molybdenum grade of the molybdenum mixed concentrate is 9.44%, and the lead grade is 1.31%. Flotation of the molybdenum-lead mixed concentrate was carried out by adopting the process of first roughing, second sweeping and four refining in the above content, and the modified chitosan inhibitor prepared in Example 1 was used as the lead inhibitor to obtain the molybdenum concentrate. After experimentation: the grade of the molybdenum concentrate is 50.36%, the lead content is 0.058%, and the recovery rate of molybdenum is 46.66%.

Embodiment 3

[0037] Embodiment 3 of the present invention discloses a kind of flotation separation method of modified chitosan inhibitor, and the technical scheme adopted is as follows:

[0038]Utilize the modified chitosan inhibitor provided by the embodiment of the present invention 1 to carry out molybdenum-lead and copper-molybdenum pure mineral artificial mixed ore flotation separation test, when the inhibitor consumption is 10mg / L, molybdenum-lead and copper-molybdenum pure mineral artificial The mixed ore is well separated. At this time, the grade of molybdenum can reach more than 52.66%, and the copper and lead content are 2.58% and 1.76% respectively.

[0039] In summary, the embodiments of the present invention have the advantages of low toxicity, safe use, convenient addition, easy access to raw materials, etc., and have strong inhibitory power to chalcopyrite, galena, pyrite, bismuthite, etc. It can well achieve the purpose of reducing impurities in molybdenum concentrate, so i...

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Abstract

The invention discloses a modified chitosan inhibitor and a flotation separation method thereof. The preparation method of the modified chitosan inhibitor is as follows: dissolving chitosan in aqueous acetic acid solution, adding thiosemicarbazide, stirring evenly, and the solution is clarified , adding formaldehyde, controlling the reaction temperature to 20-60° C., and reacting for 1-12 hours to obtain a solution containing a modified chitosan inhibitor. The inhibitor of the invention has the advantages of low toxicity, safe use, convenient addition, easy acquisition of raw materials, etc., and can well achieve the purpose of reducing impurities in molybdenum concentrate. The inhibitor can effectively inhibit chalcopyrite, pyrite, galena, bismuthite and other impurity minerals.

Description

technical field [0001] The invention relates to a modified chitosan inhibitor and a flotation separation method thereof, belonging to the technical field of molybdenum polymetallic sulfide ore beneficiation. Background technique [0002] Molybdenum is a rare metal with a high melting point. Its chemical properties are relatively stable. Metal molybdenum has the advantages of high strength, high melting point, corrosion resistance, and abrasion resistance. It also has a small expansion coefficient and good electrical and thermal conductivity. Therefore, molybdenum is used in electronic technology , metal processing, aerospace and other high-tech fields of the national economy have been widely used. [0003] The reserves of molybdenum are relatively small, and the average content in the crust is 1.1×10 -6 It mainly exists in the form of sulfide in huge porphyry molybdenum deposits or symbiotically in huge porphyry copper deposits, and a small amount occurs in sakarn and quart...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03D1/012B03D1/02B03D1/08B03D101/06B03D103/02
CPCB03D1/012B03D1/02B03D1/08B03D1/082B03D1/087B03D2201/06B03D2203/02
Inventor 张行荣路亮朱阳戈赵志强郑桂兵
Owner BEIJING MINING & METALLURGICAL TECH GRP CO LTD
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