Use of an amide compound as a sulfide mineral inhibitor

An amide compound and inhibitor technology, applied in solid separation, flotation and other directions, to achieve high-efficiency flotation separation, strong selectivity, and low dosage

Active Publication Date: 2021-08-13
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems existing in the sulfide ore inhibitors in the prior art, the object of the present invention is to provide a kind of amide compound as the purposes of the sulfide ore inhibitors

Method used

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  • Use of an amide compound as a sulfide mineral inhibitor
  • Use of an amide compound as a sulfide mineral inhibitor
  • Use of an amide compound as a sulfide mineral inhibitor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Take 2g of molybdenite, chalcopyrite, and galena single minerals with a particle size of +38-74μm for flotation respectively, take 50mL of distilled water and add it to a 70mL hanging tank flotation machine, and stir at a speed of 1300r / min to adjust the slurry , so that the slurry is fully dispersed.

[0038] Adjust the pH of the pulp to 10, according to figure 1 Described medicament system adds medicament, after adding medicament, stirs successively 5min, 2min, 1min, inhibitor is N-(3-mercapto-2-methylpropanoyl) glycine, collector is kerosene, methyl isobutyl Methanol (MIBC) was the foaming agent. Inhibitor concentrations are 0, 8.2, 16.3, 20.4, 32.6, 80, 120, 200, 300mg / L; collector and MIBC concentrations are 20mg / L; after stirring, air flotation to obtain foam products and tailings .

[0039] Filter, dry and weigh the foam product and tailings respectively, and calculate the floating rate. The results are as follows: figure 2 shown.

[0040] It can be seen fr...

Embodiment 2

[0042] Take 2g of sphalerite, pyrite and other single minerals with a particle size of +38-74μm for flotation respectively, take 50mL of distilled water and add it to a 70mL hanging tank flotation machine, stir and adjust the slurry at a speed of 1300r / min to make the slurry fully dispersion.

[0043] To adjust the pH of the pulp, add N-(3-mercapto-2-methylpropanoyl)glycine, butyl xanthate (20mg / L), MIBC (20mg / L) in sequence, and the inhibitor concentrations are 0, 8.2, 16.3, 20.4, 32.6, 80, 120, 200, 300mg / L, after adding the medicine, stir for 5min, 3min, 1min in turn. After the stirring is completed, air flotation is carried out to obtain foam products and tailings.

[0044] Filter, dry and weigh the foam product and tailings respectively, and calculate the floating rate. The results are as follows: image 3 shown.

[0045]As can be seen from the examples, N-(3-mercapto-2-methylpropanoyl) glycine has a strong inhibitory ability to pyrite and sphalerite, and when the inhi...

Embodiment 3

[0047] Take 2g of molybdenite, chalcopyrite, and galena single minerals with a particle size of +38-74μm for flotation respectively, take 50mL of distilled water and add it to a 70mL hanging tank flotation machine, and stir at a speed of 1300r / min. pulp to fully disperse the pulp.

[0048] The order of adding the medicaments is as follows: figure 1 As shown, the concentrations of N-(3-mercapto-2-methylpropanoyl)glycine added to molybdenite, chalcopyrite, and galena were 24.45, 24.45, and 48.9 mg / L, respectively, and were collected by kerosene The agent is methyl isobutyl carbinol (MIBC) as foaming agent. The concentration of collector and MIBC is 20mg / L, and the pH of the pulp is adjusted to 4, 5, 6, 8, 10, 12 before adding the agent. After the stirring is completed, air flotation, the obtained foam product and tailings, the results are as follows Figure 4 shown.

[0049] As can be seen from the examples, N-(3-mercapto-2-methylpropanoyl) glycine has almost no inhibitory e...

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Abstract

The invention discloses the use of an amide compound as a sulfide mineral inhibitor, characterized in that the amide compound has the structure shown in formula (1), (1), wherein the R 1 , R 2 It is an alkyl group with 1-5 carbon atoms substituted by one or more groups of carboxyl, amino, mercapto, and acyl, and the amide compound contains at least one carboxyl group and one mercapto group. As a sulfide mineral inhibitor, the amide compound of the invention has the advantages of strong selectivity, good inhibitory effect, less dosage, low toxicity, environmental protection and the like.

Description

technical field [0001] The invention belongs to the technical field of non-ferrous metal ore dressing, and in particular relates to the use of an amide compound as a sulfide ore inhibitor. Background technique [0002] Molybdenum is an important rare metal and strategic reserve resource, the average content of which is only 1 / 100,000 in the earth's crust. Molybdenite is the main source of molybdenum extraction, and most of molybdenite is symbiotic with sulfide minerals, especially copper sulfide minerals. According to statistics, nearly 75% of copper and 50% of molybdenum in the world are produced from copper-molybdenum ore. Copper-molybdenum ore is usually mixed flotation, and then copper-molybdenum separation is often carried out by means of copper suppression and molybdenum floating. Currently commonly used copper sulfide inhibitors mainly include sulfides (sodium sulfide, sodium hydrosulfide, etc.), cyanides (sodium cyanide, potassium cyanide, etc.), Knox reagent and s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03D1/01B03D1/012B03D101/06B03D103/02
CPCB03D1/01B03D1/012B03D2201/06B03D2203/02
Inventor 杨丙桥严海曾梦媛贾菲菲朱银鑫屈涵宇
Owner WUHAN INSTITUTE OF TECHNOLOGY
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