SU1247086A1 - Method of dressing vermiculite ores - Google Patents

Description

one

This invention relates to the enrichment of high-permeable (1PPP) perm tklunt ores ((by keeping fine-flaked vermiculite with a particle size of less than 0.4 mm and a high content of fine clay impurities and can be used for air separation of medium- and fine-grained ore fractions, followed by flotation processing of fine grades .

The purpose of the invention is to reduce the loops of vermiculite by extracting fine plume vermiculite.

The drawing shows a schematic diagram of the enrichment of vermiculite ore.

The method is carried out in the following sequence

The original ore is subjected to substance, screening, crushing large pieces to -100 (-50) mm, then grinding, which is carried out in vertical hammer crushers with free unloading of the crushed product, which ensures the effective unfolding of the aggregate, the destruction of adherent clay aggregates, layered the splitting of vermiculite plates into thinner than h thickness, shui, and at the same time there is no normal overmilling of vermiculite.

The crushed ore is subjected to a huge fire in order to separate the coarse fraction (+3 mm), which, depending on the content of vermiculite, is sent either to the tailings of the tailings or to the circulation for additional crushing, or when the yield is significant, the fraction and the total content of vermiculite are subjected to self-enrichment .

An undersize product with a particle size of -3 + 0 mm is subjected to preliminary air separation on a shelf separator, on which a fine clay dust is removed from the ore using horizontal air flow, the speed of which does not exceed the speed of soaking of thin clay particles and at the same time stratification of the granular part of the ore is carried out by size and particle shape. This produces fine-grained and coarse-grained products. In the zone of tailings discharge, empty rocks are released ;. Coarse product obtained at Fri:) by preliminary air separation of unclassified

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crushed ore is subjected to batching, which is carried out on sieves with a module of not more than 2 in order to divide it into narrow classes, which are then subjected to separate air separation with released vermiculite concentrate, tailings and industrial products, which return to the circulation, subject to pre-regrinding on the same principle as the original ore. The enrichment scheme for each narrow class includes basic and cleaning air separation and control screening of the concentrate obtained on screens with openings corresponding to the minimum grain size of this class. The screenings obtained from the concentrate are returned to separation along with the next narrowest class. The removal of rock impurities from the fine-grained product obtained during the preliminary air separation is carried out by flotation. At the same time, by reducing the amount of floatable pre-enriched and dust-free fine-grained rough concentrate, the consumption is reduced several times.

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enrichment water.

Example. A sample of fine-flaked vermiculite ore is enriched according to the scheme according to the proposed method, including grinding the sample to 3-0 cm, preliminary air separation of unclassified crushed ore on a shelf separator, as a result of which

8.3% of vermiculite contains 0.9% of vermiculite in the tailings of clay, a product of vermiculite fine-grained, with a content of vermiculite: 26.1%, which after desliming is subjected to additional enrichment by the flotation method, due to which a flotation concentrate is obtained in an amount of 5.1% of vermiculite content of 87.1%. A coarse-grained product with a particle size of 3-0 mm is dispersed into the same narrow classes and then subjected to separate air separation classes according to a known method. Elimination of 0.25 mm, isolated from the intermediate product in the amount of 8.6%, contains vermiculite 2.5% and is combined with tails. Total concentrate yield

when enrichment according to the proposed method is increased by 2.7% with a content of 86.0%, the extraction of vermiculite increases by 13.8%.

1 sodnal ore

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Cj / Koe Shortage Screening

Control spofrvenie

KOHt HbfeOmce & rt zirconcentration / coulcution

Editor E. Kopcha

Compiled by E. Kiseleva Tehred V. Kadar

Circulation 514

Subscription

Order 4047/9

BHliHITli USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Conduct-printing company, Uzhgorod, st. Project, 4

xsocmb /

Proofreader V. Sinitska

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Claims (1)

METHOD FOR VERMICULITE ORE beneficiation, including drying, crushing, screening into narrow classes, separate air separation of each class, characterized in that, in order to reduce vermiculite losses due to the extraction of fine-grained vermiculite, they are subjected to narrow preliminary ore screening before screening with obtaining dust, gangue, fine-grained and coarse-grained products, while the coarse-grained product of preliminary air separation is sent to screening for narrow classes, and fine-grained The froth product of the preliminary air separation is sent to flotation. SU „., 1247086