A method for separating low-grade fluorite-barite paragenetic ore rich in calcite

Abstract

The invention discloses a method for separating low-grade fluorite-barite paragenetic ore rich in calcite, comprising the following steps: S1. crushing; S2. grading to obtain fine-grained ore, medium-grained ore and coarse-grained ore; S3. Perform jigging gravity separation on medium-sized ores to obtain medium-sized concentrates and tailings I; S4. Perform jigging gravity separation on coarse-sized ores to obtain coarse-sized concentrates and tailings II; S5. Combining grain grade concentrate and coarse grade concentrate to obtain barite concentrate I; combining tailings I and tailing II to obtain jigging tailings; S6. Color separation of jigging tailings to obtain calcite minerals and Color separation tailings; S7. Combine fine-grained ore and color separation tailings for grinding to obtain floating materials; S8. Separate flotation to obtain fluorite concentrate and flotation tailings; S9. Flotation tailings Carry out chute gravity separation to obtain barite concentrate II and chute tailings; 2 ≥98%) and barite concentrate, and the flotation backwater can be recycled.

Description

technical field [0001] The invention relates to the technical field of beneficiation of fluorite-barite paragenetic ore, in particular to a method for separating low-grade fluorite-barite paragenetic ore rich in calcite. Background technique [0002] Fluorspar is a non-metallic mineral resource with strategic significance, and its application fields cover metallurgy, chemical industry, building materials, ceramics, aviation, refrigeration, medicine, atomic energy industry, fluorine chemical industry and other traditional and emerging industries. Both Europe and the United States and my country have listed it as an important strategic mineral resource, and have adopted various protection measures for its development and utilization. [0003] At present, more than half of the world's fluorite production is used to produce hydrofluoric acid (the chemical industry needs high-grade fluorite concentrate, generally above the acid level, that is, CaF 2 ≥97%). Fluorine chemical pro...

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Problems solved by technology

[0010] Although the above-mentioned patent documents can recover fluorite and barite at the same time, this process adopts three kinds of medicament systems, and there are many kinds of medicaments, so that the flotation backwater cannot be recycled; and the grade of fluorite concentrate obtained by this method is also not high. Only 94~98%

[0011] In summary, we urgently need a kind of reasonable development of fluorite-barite paragenetic ore, especially a large number of low-grade ores with a fluorite content of less than 25%, so as to obtain high-quality acid-grade fluorite concentrate (CaF 2 ≥98%) and barite concentrate, and a separation method that can solve the problem that flotation backwater cannot be recycled

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