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
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[0015] Example 1
[0016] The molybdenum tailings in the rough concentrate of a mine in Jiangxi contain Bi 2.54%, Mo 0.0027%, and S 13.69%.
[0017] Slurry adjustment: add sulfuric acid to adjust the pH value of the pulp to 5.5, and stir for 10 minutes; perform a flotation roughing, secondary flotation sweeping, and three blank selections on the molybdenum tailings according to the dosage listed in Table 1 to obtain bismuth Concentrates and flotation tailings. The recovery rate of bismuth is 97.81%, and the bismuth concentrate contains 33.64% Bi.
[0018] The results of Example 1 are shown in Table 2.
[0019] Table 2 Results of Example 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 Selecting molybdenum tailings 100.00 2.54 100.00
Example Embodiment
[0021] Example 2
[0022] The molybdenum tailings of a polymetallic mine in Hunan contain Bi 0.27%, Mo 0.0014%, and S 6.77%.
[0023] Slurry adjustment: add sulfuric acid to adjust the pH value of the pulp to 6, and stir for 15 minutes; carry out one flotation roughing, one flotation sweeping and one blank sweeping, and four blank sweeps on the molybdenum tailings according to the dosage listed in Table 1. Selected to obtain bismuth concentrate and flotation tailings. The recovery rate of bismuth was 86.19%. The bismuth concentrate contains 21.33% Bi.
[0024] The results of Example 2 are shown in Table 3.
[0025] Table 3 Results of Example 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 Selecting molybdenum tailings 100.00 0.27 100.00
Example Embodiment
[0027] Example 3
[0028] The molybdenum tailings of a molybdenum mine in Henan contain Bi 0.41%, Mo 0.0030%, and S 9.71%.
[0029] Slurry adjustment: add sulfuric acid to adjust the pH value of the pulp to 6, and stir for 15 minutes; perform a flotation roughing, a second flotation sweeping, and 4 blank selections on the molybdenum tailings according to the dosage listed in Table 1 to obtain Bismuth concentrates and flotation tailings. The recovery rate of bismuth is 88.81%, and the bismuth concentrate contains 24.16% Bi.
[0030] The results of Example 3 are shown in Table 4.
[0031] Table 4 Results of Example 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 Selecting molybdenum tailings 100.00 0.41 100.00
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