COMBINED COLLECTOR FOR ZINC OXIDE ORE FLOTATION AND USE THEREOF

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

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.

2. 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.

3. 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.

4. 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.

5. 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.

6. 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.

7. 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.

8. 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.

9. 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.

Description

DETAILED DESCRIPTION

[0024] Hereinafter, the present disclosure will be described in further detail with reference to specific examples, but the scope of the present disclosure is not limited thereto. In the examples of the present disclosure, the contents herein are all expressed by mass, unless otherwise specified.

Example 1

[0025] This example took a zinc oxide ore in the form of run-of-mine ore as the object, the ore sample contained about 7.60% of zinc, wherein the oxidation rate of zinc is about 70%, the main gangue minerals are quartz, calcite, chlorite, mica, gypsum and so on. The used combined collector of the present disclosure consisted of: 75 wt % of sodium oleate, 5 wt % of benzylhydroximic acid and 20 wt % of sodium 2-mercaptobenzothiazole.

[0026] The run-of-mine ore was ground to an extent that the content of the ore with a particle size of 0.074 mm or less is 85%, Sodium carbonate was first added for a pulp conditioning to a pH of about 9.5, then 3000 g/t of an inhibitor (which is a combined inhibitor consisting of 500 g/t of water glass, 500 g/t of a soluble starch, 1000 g/t of a lignosulfonate and 1000 g/t of a phosphate) was added, then 1000 g/t of the combined collector was added for a stirred pulp conditioning, and the resulting system was subjected to a flotation for 7 min, to obtain a zinc concentrate. The test results were shown in Table 1.

Example 2

[0027] The conditions were identical to those of Example 1 except that the combined collector consisted of 80 wt % of sodium oleate and 20 wt % of sodium 2-mercaptobenzothiazole, and was used in an amount of 1000 g/t. The test results were shown in Table 1.

Example 3

[0028] The conditions were identical to those of Example 1 except that the combined collector consisted of 80 wt % of sodium oleate, 10 wt % of benzylhydroximic acid and 10 wt % of sodium 2-mercaptobenzothiazole, and was used in an amount of 1000 g/t. The test results were shown in Table 1.

Comparative Example 1

[0029] The conditions were identical to those of Example 1 except that the combined collector consisted of 95 wt % of sodium oleate and 5 wt % of benzylhydroximic acid, and was used in an amount of 1000 g/t. The test results were shown in Table 1.

Comparative Example 2

[0030] The conditions were identical to those of Example 1 except that the combined collector consisted of 55 wt % of sodium oleate, 5 wt % of benzylhydroximic acid and 40 wt % of sodium 2-mercaptobenzothiazole, and was used in an amount of 1000 g/t. The test results were shown in Table 1.

TABLE-US-00001 TABLE 1 Flotation test results for low-grade zinc oxide ores Yield Zn grade Zn recovery rate Examples Product Name (%) (%) (%) Example 1 Zinc 30.87 21.85 88.28 concentrate Example 2 Zinc 35.93 19.05 88.75 concentrate Example 3 Zinc 29.12 23.13 87.50 concentrate Comparative Zinc 32.65 20.21 86.84 Example 1 concentrate Comparative Zinc 42.95 16.60 91.47 Example 2 concentrate