Method for selecting low-grade and hard-selected fluorite mill tailings with many impurities
A technology of fluorite tailings and beneficiation method, applied in the field of fluorite ore flotation, can solve the problems of high technical requirements for production technology, higher production cost than raw ore, fluorite tailings fluorite resources not being effectively recycled, etc. To achieve the effect of improving the comprehensive recovery rate and reducing the production cost
Active Publication Date: 2014-03-19
湖南中蓝新材料科技有限公司
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Problems solved by technology
Judging from the current domestic fluorite tailings re-election fluorspar manufacturers, in order to obtain high-quality fluorspar concentrate from low-grade (<30%) fluorspar tailings, not only the production process technology requirements are very high, and some The production cost is even higher than that of the raw ore, so the fluorite resources in the fluorite tailings have not been effectively recycled.
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Embodiment Construction
[0013] The multi-impurity and low-grade refractory fluorite tailings mineral processing method of the present invention comprises the following steps:
[0014] a. Grinding. Make the tailings ore a slurry with a fineness of -200 mesh accounting for more than 90%;
[0015] b. Rough selection. Add a pH adjuster to the pulp processed through the above steps to make the pH value of the pulp about 8, then add water glass to fully disperse the components in the pulp, and finally add fluorite collector and stir for 10 minutes. The mass ratio of fluorite tailings is 1:5000, the mass ratio of oleic acid to fluorite used is 1:8000, the concentration of the rougher flotation slurry is 30%, and the rougher is carried out at room temperature to obtain the rougher with a fluorite grade of 60%. Concentrate;
[0016] c. A selection. Add appropriate amount of salinized water glass to the coarse concentrate obtained after the above steps to remove impurities such as quartz, and then perform ...
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The invention discloses a method for selecting low-grade and hard-selected fluorite mill tailings with many impurities. The method comprises the first step of carrying out grinding to enable mill tailing ore to be ore pulp with the fineness being -200 mesh accounting for more than 90%, the second step of carrying out roughing at the normal temperature to obtain the rough concentrate with the fluorite grade being 60%, the third step of carrying out primary selection to enable the fluorite grade to be about 80%, the fourth step of carrying out secondary selection to enable the fluorite grade to be 90%, and the fifth step of carrying out third selection to obtain some 95% high-grade fluorite and some 80% low-grade fluorite. The 95% high-grade fluorite and the 80% low-grade fluorite are produced according to a certain proportion, and the finally the recovery rate of the fluorite is larger than 75%.
Description
technical field [0001] The invention relates to a flotation method for fluorite ore, in particular to a beneficiation method for multi-impurity and low-grade refractory fluorite tailing sand ore. Background technique [0002] During the production of fluorite, a large amount of low-grade refractory fluorite tailings with multiple impurities will be produced. Fluorite tailings (low-grade ore) are ores with very low fluorite (CaF2) content. Generally, domestic fluorite manufacturers will not reuse the fluorite (CaF2) contained in it, but according to the "Fluorite Industry Standards According to the requirements in "Entry Conditions", build corresponding fluorite tailings dams to collect them. This not only wastes resources, but also pollutes the environment. Our country produces millions of tons of fluorite tailings every year, and most of the tailings have not been effectively recovered. The treatment of these tailings requires a large number of sites or tailings stocks, w...
Claims
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IPC IPC(8): B03D1/001
Inventor 刘振军马兴巍曹外芳刘志方肖芫华
Owner 湖南中蓝新材料科技有限公司