METHOD FOR REGULATION OF SEDIMENTATION OF PRODUCTS OF MINING PRODUCTION Russian patent published in 2022 - IPC B01D21/01 B03D3/06 C02F1/56 C02F11/147 

FIELD: mining.

SUBSTANCE: invention relates to a method for regulation of sedimentation of an aqueous mineral suspension containing at least one flocculating agent, with a content of dry solid substances, which is more than 10% of the weight of the suspension selected from: a water residue of metal ore, an aqueous suspension of metal ore, and an aqueous suspension of metal suitable for use, produced from metal ore, or of a derivative of the specified metal. The method includes concentration of the aqueous suspension by means of sedimentation in the presence of at least one polymer (P) with molecular weight Mw measured by means of gel-penetrating chromatography (GPC), which is in the range from 2000 to 20,000 g/mol, and obtained by means of at least one reaction of radical polymerization, at a temperature of more than 50°C, at least one anionic monomer (M) containing at least one polymerized olefin unsaturation and at least one group of carboxylic acid or one of its salts, in the presence of at least one radical-forming compound selected from hydrogen peroxide, benzoyl peroxide, acetyl peroxide, lauryl peroxide, tert-butyl hydroperoxide, cumenhydroperoxide, ammonia persulfate, alkaline metal persulfate, preferably sodium persulfate or potassium persulfate, an azo compound, such as 2,2'-azobis(2-(4,5-dihydroimidazolyl)propane, 2,2'-azobis(2-methylpropionamidine)dihydrochloride, diazo-valeronitrile, 4,4'-azobis-(4-cyanovaleric) acid, azobis-isobutyronitrile (AZDN), or 2,2'-azobis-isobutyronitrile, and their corresponding combinations or associations with an ion selected from Fe^II, Fe^III, Cu^I, Cu^II, and mixtures thereof. An aqueous mineral suspension for regulated sedimentation is also proposed.

EFFECT: invention allows for control of suspension viscosity, which facilitates its injection, mixing, or movement and makes it possible to reduce water consumption.

16 cl, 2 tbl