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Beneficiation method for recycling bismuth from molybdenum selecting tailings

A beneficiation method and technology for molybdenum tailings, which are applied in flotation, solid separation and other directions, can solve the problems of poor activation of bismuthite and low recovery rate, and achieve low beneficiation cost, improved flotation recovery rate, and simple process flow. Effect

Inactive Publication Date: 2013-11-27
GUANGZHOU RES INST OF NON FERROUS METALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a mineral processing method for recovering bismuth from molybdenum tailings under weakly acidic conditions, so as to solve the problems of poor activation of bismuthite and low recovery rate under alkaline conditions

Method used

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  • Beneficiation method for recycling bismuth from molybdenum selecting tailings

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] The molybdenum tailings of a mine in Jiangxi contain Bi 2.54%, Mo 0.0027%, and S 13.69%.

[0017] Slurry preparation: add sulfuric acid to adjust the pH value of the slurry to 5.5, and stir for 10 minutes; perform primary flotation roughing on molybdenum tailings according to the amount of chemicals listed in Table 1, secondary flotation sweeping, and three blank separations to obtain bismuth Concentrates and flotation tailings. The bismuth recovery rate is 97.81%, and the bismuth concentrate contains 33.64% Bi.

[0018] The results of Example 1 are shown in Table 2.

[0019] The result of table 2 embodiment 1

[0020] name Yield(%) Bismuth content (%) Bismuth recovery rate (%) Bismuth concentrate 7.38 33.64 97.81 Flotation tailings 92.62 0.06 2.19 Molybdenum tailings 100.00 2.54 100.00

Embodiment 2

[0022] The molybdenum tailings of a polymetallic mine in Hunan contain 0.27% Bi, 0.0014% Mo and 6.77% S.

[0023] Slurry adjustment: add sulfuric acid to adjust the pH value of the slurry to 6, and stir for 15 minutes; carry out one flotation roughing, one flotation sweep and one blank sweep, and four blank Concentrate to obtain bismuth concentrate and flotation tailings. The recovery rate of bismuth was 86.19%. Bismuth concentrate contains 21.33% Bi.

[0024] The results of Example 2 are shown in Table 3.

[0025] The result of table 3 embodiment 2

[0026] name Yield(%) Bismuth content (%) Bismuth recovery rate (%) Bismuth concentrate 1.10 21.33 86.19 Flotation tailings 98.90 0.038 13.81 Molybdenum tailings 100.00 0.27 100.00

Embodiment 3

[0028] The molybdenum tailings of a molybdenum mine in Henan contain 0.41% Bi, 0.0030% Mo and 9.71% S.

[0029] Slurry adjustment: add sulfuric acid to adjust the pH value of the slurry to 6, and stir for 15 minutes; carry out a flotation roughing on the molybdenum tailings according to the amount of chemicals listed in Table 1, a second flotation sweep, and 4 blank selections to obtain Bismuth concentrate and flotation tailings. The bismuth recovery rate is 88.81%, and the bismuth concentrate contains 24.16% Bi.

[0030] The results of Example 3 are shown in Table 4.

[0031] The result of table 4 embodiment 3

[0032] name Yield(%) Bismuth content (%) Bismuth recovery rate (%) Bismuth concentrate 1.52 24.16 88.81 Flotation tailings 98.48 0.047 11.19 Molybdenum tailings 100.00 0.41 100.00

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Abstract

A beneficiation method for recycling bismuth from molybdenum selecting tailings is characterized by including the following steps that grout is mixed, in the step, concentrated sulfuric acid is added into the molybdenum selecting tailings; flotation roughing is performed, in the step, activator lead nitrate, collecting agent butyl xanthate and foaming agent terpenic oil are added to perform primary roughing to obtain roughed concentrate and roughed tailings; floating scavenging is performed, in the step, the butyl xanthate and the foaming agent terpenic oil are added in the primary scavenging of the roughed tailings, and the butyl xanthate and the foaming agent terpenic oil are added in the secondary scavenging or blank scavenging is performed to obtain scavenged concentrate and flotation tailings; flotation fine selection is performed, in the step, three to four times of blank fine selection is performed on the roughed concentrate to obtain bismuth concentrate and fine selected tailings; the fine selected tailings and the scavenged concentrate are made to return to the flotation roughing operation. According to the beneficiation method, bismuth is recycled from the molybdenum selecting tailings under the faintly acid condition in order to solve the problems that under the alkaline condition, activation of bismuthinite is poor and the recycling efficiency is low. According to the method, the recycling rate of the bismuth is larger than 85%, the Bi content in the bismuth concentrate is larger than 20%, and the method is applicable to molybdenum ore mines containing bismuth.

Description

technical field [0001] The invention relates to an ore dressing method for recovering bismuth from molybdenum tailings. Background technique [0002] Bismuth is a typical rare dispersed metal element. Although isolated minerals of bismuth are common, they are rarely enriched as isolated industrial deposits. Bismuth mainly exists as an associated element in tungsten-tin ore, lead-zinc ore, copper ore, molybdenum ore, gold ore and other ores, and the content is low, and it is usually comprehensively recovered as a by-product. Because of its low melting point (271°C), bismuth has long been used to make fusible alloys, and is widely used in fire protection and electrical industry. [0003] China's bismuth resource reserves rank first in the world, and it is not only the world's largest bismuth producer, but also the world's largest exporter of bismuth raw materials. There are more than 50 kinds of bismuth minerals, and the ones with industrial value are bismuthite, bismuthite...

Claims

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Application Information

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IPC IPC(8): B03D1/00B03D1/002
Inventor 王国生韩兆元徐晓萍高玉德文儒景万丽
Owner GUANGZHOU RES INST OF NON FERROUS METALS
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