METHOD FOR CONCENTRATION OF CARBONATE-FLUORITE ORE Russian patent published in 2018 - IPC B03D1/02 

FIELD: mining; technological processes.

SUBSTANCE: present invention relates to mineral beneficiation and can be used in flotation enrichment of poor refractory carbonate-fluorite ores with fine germination of mineral components and high calcite content. Method for beneficiation of carbonate-fluorite ores includes wet grinding in the presence of a medium regulator – soda ash, up to a size providing optimum opening of mineral grains, contacting with liquid glass, the main stage of conditioning at a temperature of 18–28 °C for 5–10 minutes with a collector – fatty acids of tall oil in a mixture with a combined modifier, subsequent foam flotation with the release of black fluorite concentrate into the foam product and purging operations of flotation of the crude concentrate with the introduction of modifiers. At the main stage of ore conditioning, the amount of fatty acids of tall oil is at least 400 g/t. As a modifier, ammonium fluoride is added in an amount of 600–900 g/t and lignosulphonates in an amount of 200–400 g/t, depending on the fluorite and calcite content of the starting ore. At the first and second stages of purification operations of concentrate flotation, 100–200 g/t of liquid glass, 50–150 g/ton of ammonium fluoride, 50–100 g/t of lignosulphonates are added depending on the fluorite and calcite content in the crude concentrate.

EFFECT: high efficiency of the process in flotation enrichment of poor refractory carbonate-fluorite ores with thin germination of mineral components and a high content of calcite by increasing the selectivity of flotation.

1 cl, 2 tbl