# US 2021/0276024 A1 · Combined collector for zinc oxide ore flotation and use thereof

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- Number: US 2021/0276024 A1
- Document ID: US20210276024A1
- Status: Published application
- Kind: A1
- Application number: 17/105,990
- Filed: 2020-11-27
- Published: 2021-09-09
- Earliest claimed: 2020-03-05
- Assignees: Central South University
- Applicants: Central South University
- Inventors: Qing SHI; Guofan ZHANG; Leming OU
- Web page: https://patentgrep.com/patent/US20210276024A1

## CPC

- B03D 1/008: containing oxygen
- B03D 1/016: Macromolecular compounds
- B03D 1/01: containing nitrogen
- B03D 1/012: containing sulfur
- C01G 9/02: Oxides; Hydroxides
- B03D 2201/007: Modifying reagents for adjusting pH or conductivity
- B03D 2201/02: Collectors
- B03D 2203/04: Non-sulfide ores
- B03D: FLOTATION; DIFFERENTIAL SEDIMENTATION (sedimentation in general B01D21/00; in combination with other separation of solids B03B; sink-float separation B03B5/28; detergents, soaps C11D)
- C01G: COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F (metal hydrides {monoborane, diborane or addition complexes thereof} C01B6/00; salts of oxyacids of halogens C01B11/00; peroxides, salts or peroxyacids C01B15/00; thiosulfates, dithionites, polythionates C01B17/64; compounds containing selenium, or tellurium C01B19/00; binary compounds of nitrogen with metals C01B21/06; azides C01B21/08; {compounds containing nitrogen, other non-metals and metal C01B21/082}; metal amides C01B21/092; nitrites C01B21/50; {compounds of noble gases C01B23/0005}; phosphides C01B25/08; salts of oxyacids of phosphorus C01B25/16; carbides C01B32/90; compounds containing silicon C01B33/00; compounds containing boron C01B35/00; compounds having molecular sieve properties but not having base-exchange properties C01B37/00; compounds having molecular sieve and base-exchange properties, e.g. crystalline zeolites, C01B39/00; cyanides C01C3/08; salts of cyanamide C01C3/16; thiocyanates C01C3/20)

## Abstract

The present disclosure discloses a combined collector for zinc oxide ore flotation, including the following components in percentage by mass: 60-95 wt % of a fatty acid, 0-10 wt % of a hydroxamic acid and 5-35 wt % of a mercaptobenzothiazole. In the flotation process of zinc oxide ore, due to the use of the combined collector of the present disclosure, it is not required to deslime. On the premise of ensuring the zinc grade in the zinc concentrate, the flotation recovery rate of the zinc concentrate is improved and the zinc grade of mineral processing tailings is reduced by using the combined collector, thereby reducing the loss of zinc metal.

## Claims

### Claim 1

A combined collector for zinc oxide ore flotation, comprising the following components in percentage by mass:
60-95 wt % of a fatty acid;
0-10 wt % of a hydroximic acid; and
5-35 wt % of a mercaptobenzothiazole.

### Claim 2 (depends on 1)

The combined collector for zinc oxide ore flotation as claimed in claim 1, wherein the combined collector comprises the following components in percentage by mass:
70-85 wt % of a fatty acid;
5-10 wt % of a hydroximic acid; and
10-20 wt % of a mercaptobenzothiazole.

### Claim 3 (depends on 1)

The combined collector for zinc oxide ore flotation as claimed in claim 1, wherein the fatty acid is at least one selected from the group consisting of oleic acid, oleate, palmitic acid, palmitate, stearic acid, stearate, lauric acid, laurate, palmitic acid and palmitate.

### Claim 4 (depends on 1)

The combined collector for zinc oxide ore flotation as claimed in claim 1, wherein the hydroximic acid is at least one selected from the group consisting of benzylhydroximic acid, salicylhydroxamic acid and alkyl hydroxamic acid.

### Claim 5 (depends on 1)

The combined collector for zinc oxide ore flotation as claimed in claim 1, wherein the mercaptobenzothiazole is at least one selected from the group consisting of 2-mercaptobenzothiazole and sodium 2-mercaptobenzothiazole.

### Claim 6 (depends on 1)

A use of the combined collector for zinc oxide ore flotation as claimed in claim 1, comprising:
grinding a zinc oxide ore in the form of run-of-mine ore to an extent that the content of the ore with a particle size of 0.074 mm or less is not less than 60%, subjecting the ground zinc oxide ore to a pulp conditioning to a pH of 8-12, then adding 500-3500 g/t of an inhibitor; adding 400-1200 g/t of the combined collector, carrying out another pulp conditioning and a flotation, to obtain a zinc oxide concentrate.

### Claim 7 (depends on 2)

The combined collector for zinc oxide ore flotation as claimed in claim 2, wherein the fatty acid is at least one selected from the group consisting of oleic acid, oleate, palmitic acid, palmitate, stearic acid, stearate, lauric acid, laurate, palmitic acid and palmitate.

### Claim 8 (depends on 2)

The combined collector for zinc oxide ore flotation as claimed in claim 2, wherein the hydroximic acid is at least one selected from the group consisting of benzylhydroximic acid, salicylhydroxamic acid and alkyl hydroxamic acid.

### Claim 9 (depends on 2)

The combined collector for zinc oxide ore flotation as claimed in claim 2, wherein the mercaptobenzothiazole is at least one selected from the group consisting of 2-mercaptobenzothiazole and sodium 2-mercaptobenzothiazole.