Mineral separation method for recycling iron, rare earth, fluorite and niobium from iron tailings of associated multi-metal minerals
A technology for iron tailings and polymetals, applied in chemical instruments and methods, wet separation, solid separation, etc., can solve the problems of complex mineral types, waste of resources, refractory beneficiation, etc., to reduce the amount of fluorite flotation, The effect of reducing the dosage of reducing agent and increasing the quality of concentrate
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[0036] Example 1
[0037] In this example, the tailings in the Bayan Obo tailing pond are used as raw materials, in which the grade of iron (TFe) is 18.77%, and the fluorite (CaF 2 ) The grade is 20.62%, and the rare earth (REO) grade is 7.02%. The method of the present invention finally obtains iron concentrate with an iron grade of 65.89% and a recovery rate of 88.75%; a rare earth concentrate with a rare earth grade of 68.54% and a recovery rate of 82.12%; a fluorite grade of 95.21% and a recovery rate of 81.53% The fluorite concentrate includes the following steps:
[0038] (1) Feed the Baiyun Obo tailings into a wet permanent magnetic cylinder magnetic separator with a magnetic field strength of 0.25T to obtain a weak magnetic pre-enriched concentrate and a weak magnetic pre-enriched tailing.
[0039] (2) Feed the weak magnetic pre-concentration tailings into a vertical ring wet-type strong magnetic separator with a magnetic field strength of 0.65T to obtain strong magnetic pre...
Example Embodiment
[0046] Example 2
[0047] In this example, the tailings in the Bayan Obo tailings pond are used as raw materials, in which the grade of iron (TFe) is 16.10%, and the fluorite (CaF 2 ) The grade is 30.25%, and the rare earth (REO) grade is 6.00%. The method of the present invention finally obtains iron concentrate with an iron grade of 65.09% and a recovery rate of 85.87%; a rare earth concentrate with a rare earth grade of 66.79% and a recovery rate of 80.32%; a fluorite grade of 95.82% and a recovery rate of 82.37% The fluorite concentrate includes the following steps:
[0048] (1) Feed the Baiyun Obo tailings into a wet permanent magnetic cylinder magnetic separator with a magnetic field strength of 0.2T to obtain a weak magnetic pre-enriched concentrate and a weak magnetic pre-enriched tailing.
[0049] (2) Feed the weak magnetic pre-enriched tailings into a vertical ring wet-type strong magnetic separator with a magnetic field strength of 0.6T to obtain strong magnetic pre-enric...
Example Embodiment
[0056] Example 3
[0057] In this example, the tailings in the Bayan Obo tailings pond are used as raw materials, in which the grade of iron (TFe) is 17.74%, and the fluorite (CaF 2 ) The grade is 28.96%, and the rare earth (REO) grade is 6.85%. The method of the present invention finally obtains iron concentrate with an iron grade of 66.13% and a recovery rate of 77.69%; a rare earth concentrate with a rare earth grade of 65.21% and a recovery rate of 81.57%; a fluorite grade of 95.63% and a recovery rate of 81.86% The fluorite concentrate includes the following steps:
[0058] (1) Feed the Baiyun Obo tailings into a wet permanent magnetic cylinder magnetic separator with a magnetic field strength of 0.2T to obtain a weak magnetic pre-enriched concentrate and a weak magnetic pre-enriched tailing.
[0059] (2) Feed the weak magnetic pre-concentration tailings into a vertical ring wet-type strong magnetic separator with a magnetic field strength of 0.65T to obtain strong magnetic pre...
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