A modified carboxymethyl cellulose-based mineral flotation inhibitor, its preparation method and its use method

A technology of carboxymethyl cellulose and sodium carboxymethyl cellulose, which is applied in the field of modified carboxymethyl cellulose-based mineral flotation inhibitors, can solve the problems of difficult uniform dispersion, poor inhibition effect, complex composition, etc. Achieve significant economic and social benefits, increase mineral recovery rate, and improve silicon removal rate

Active Publication Date: 2019-10-18
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Because carboxymethyl cellulose has strong hygroscopicity and swells with water to form a transparent colloidal solution, it is difficult to disperse evenly in water during production and use, and the inhibitory effect of carboxymethyl cellulose alone as an inhibitor is poor
At present, its utilization technology is based on mixing with other components, with various components and complex composition
In addition, carboxymethyl cellulose can also be used soluble in ethanol, but due to the volatility of ethanol, the use process has certain safety hazards

Method used

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  • A modified carboxymethyl cellulose-based mineral flotation inhibitor, its preparation method and its use method
  • A modified carboxymethyl cellulose-based mineral flotation inhibitor, its preparation method and its use method
  • A modified carboxymethyl cellulose-based mineral flotation inhibitor, its preparation method and its use method

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Experimental program
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Effect test

Embodiment 1

[0018] A modified carboxymethylcellulose-based mineral flotation inhibitor, the preparation process of which includes two steps of crude and refined: sodium carboxymethylcellulose, ammonium persulfate, and acrylamide in a mass ratio of 1:0.01:1 ; Dissolve 1 g sodium carboxymethylcellulose in 100 mL deionized water to make a 1% (w / v) solution, and then in N 2 Add 0.01 g of ammonium persulfate under protection, stir and mix for 30 min, then add 1 g of acrylamide, stir and react at 50 °C for 2 h to obtain the crude product of modified carboxymethylcellulose-based mineral flotation inhibitor; The crude product was added to 200 mL of ethanol, precipitated, filtered, washed, and vacuum-dried at 50 °C for 12 hours to obtain a refined modified carboxymethylcellulose-based mineral flotation inhibitor.

[0019] When the modified carboxymethylcellulose-based mineral flotation inhibitor is used for reverse flotation hematite desiliconization (iron content TFe=64.66wt%), the modified carbo...

Embodiment 2

[0023] A modified carboxymethylcellulose-based mineral flotation inhibitor, the preparation process of which includes two steps of crude and refined: sodium carboxymethylcellulose, ammonium persulfate, and acrylamide in a mass ratio of 1:0.01:2 ; Dissolve 1 g sodium carboxymethylcellulose in 100 mL deionized water to make a 1% (w / v) solution, and then in N 2 Add 0.01 g of ammonium persulfate under protection, stir and mix for 30 min, then add 2 g of acrylamide, stir and react at 60 °C for 3 h to obtain the crude product of modified carboxymethyl cellulose-based mineral flotation inhibitor; add the crude product to 200 mL Ethanol, precipitation, filtration, washing, and vacuum drying at 50 °C for 12 h to obtain a refined modified carboxymethyl cellulose-based mineral flotation inhibitor.

[0024] When the modified carboxymethylcellulose-based mineral flotation inhibitor is used for reverse flotation hematite desiliconization (iron content TFe=64.66wt%), the modified carboxymeth...

Embodiment 3

[0028] A modified carboxymethylcellulose-based mineral flotation inhibitor, the preparation process of which includes two steps of crude and refined: sodium carboxymethylcellulose, ammonium persulfate, and acrylamide in a mass ratio of 1:0.01:4 ; Dissolve 1 g sodium carboxymethylcellulose in 100 mL deionized water to make a 1% (w / v) solution, and then in N 2 Add 0.01 g of ammonium persulfate under protection, stir and mix for 60 min, then add 4 g of acrylamide, stir and react at 60 °C for 3 h to obtain the crude product of modified carboxymethyl cellulose-based mineral flotation inhibitor; add the crude product to 300 mL Ethanol, precipitation, filtration, washing, and vacuum drying at 50 °C for 24 h to obtain a refined modified carboxymethyl cellulose-based mineral flotation inhibitor.

[0029] When the modified carboxymethylcellulose-based mineral flotation inhibitor is used for reverse flotation hematite desiliconization (iron content TFe=64.66wt%), the modified carboxymeth...

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Abstract

The invention discloses a modified carboxymethyl cellulose-based mineral floatation depressing agent, as well as a preparation method and a using method for the same. The depressing agent is prepared by polymerizing and modifying sodium carboxymethyl cellulose with acrylamide, comprising the following steps: stirring and mixing an initiator ammonium persulfate and the sodium carboxymethyl cellulose under the protection of an inert atmosphere; adding the acrylamide, and initiating the acrylamide to undergo polymerization reaction on a sodium carboxymethyl cellulose chain to obtain a crude product by virtue of the ammonium persulfate; performing ethanol precipitation and filtration on the crude product to obtain the modified carboxymethyl cellulose-based mineral floatation depressing agent. Compared with pure arboxymethyl cellulose, the modified carboxymethyl cellulose-based mineral floatation depressing agent has the advantages that the hematite reverse floatation desilication effects are obviously improved, the target mineral recovery rate is increased, and the quality of concentrates is remarkably improved. By the modified carboxymethyl cellulose-based mineral floatation depressing agent, the hydrophilicity of a chemical can be improved, the using amount of the chemical can be reduced, the floatation effects can be improved, and remarkable economic and social benefits are created.

Description

technical field [0001] The invention belongs to the field of mineral processing, and in particular relates to a modified carboxymethyl cellulose-based mineral flotation inhibitor, its preparation method and its use method. Background technique [0002] The organic polymer inhibitors are well selected and have strong inhibitory performance, which can make up for the shortcomings of some inorganic inhibitors due to their toxicity or unsatisfactory inhibitory effect. In addition, by changing or modifying the relative molecular weight, organic inhibitors also have dispersive and flocculating effects. Common polymer inhibitors include natural starches, celluloses, polysaccharides, lignins, and tannins, as well as synthetic polyvinylpyrrolidone, polyvinyl alcohol, polyacrylic acid, and polyacrylamide. Carboxymethyl cellulose is widely used as a flotation inhibitor in the field of mineral processing, and it plays an irreplaceable role in the flotation separation of polymetallic or...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03D1/018B03D101/06B03D103/02
Inventor 韩桂洪刘炯天黄艳芳柴文翠武宏阳范桂侠苏胜鹏杨桐桐曹宁严朕党殿原杨淑珍张多王文娟邢龙杰刘路路
Owner ZHENGZHOU UNIV
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