Beneficiation method of high calcium carbonate content type fluorite ore

Abstract

The invention relates to a beneficiation method of high calcium carbonate content type fluorite ore and belongs to the field of beneficiation. The beneficiation method comprises the steps of conducting flotation, wherein ore grinding is conducted on the high calcium carbonate content type fluorite ore until the fluorite ore with the granularity smaller than 74 microns accounts for 78%-92% firstly, secondly, sodium carbonate serving as a pulp regulator, acidized sodium silicate serving as a gangue inhibitor and sodium oleate serving as a catching agent are added in sequence, and then a fluorite rough concentrate is obtained; conducting concentration six times, wherein concentration is conducted on the fluorite rough concentrate obtained through the last step six times, acidized sodium silicate serving as a gangue inhibitor and tannin are added in sequence every time concentration is conducted from the third time to the sixth time, and a fluorite concentrate pulp is obtained after concentration is conducted six times; conducting acid leaching, wherein the fluorite concentrate pulp obtained from the last step is concentrated, hydrofluoric acid is added, the fluorite concentrate pulp and the hydrofluoric acid are evenly mixed, leaching is conducted, and a high-grade fluorite concentrate can be obtained after liquid-solid separation. By the adoption of the beneficiation method, the beneficiation effect is good and the recovery rate of fluorite is high.

Description

technical field

[0001] The invention relates to a beneficiation method of high calcium carbonate type fluorite ore, which belongs to the technical field of beneficiation. Background technique

[0002] Fluorspar is a strategic mineral, and fluorspar deposits of industrial significance are distributed all over the world. Fluorite contains the halogen element fluorine, which is the only raw material for the production of hydrofluoric acid and the main raw material for the production of fluorine-containing compounds. my country is a big country with fluorite resources, but the average content of calcium fluoride in the ore is only 34.7%, and high-grade rich ore only accounts for 2% of the national total. The characteristics of my country's fluorite mineral resources are: there are many single-type fluorite deposits (points), but few reserves; there are few associated (symbiotic) type deposits (points), but large reserves; there are many lean ores and few rich ores; refractory o...

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