SU1321469A1 - Method of separating coal-containing product - Google Patents

Abstract

The invention relates to the field of environmental protection and the rational use of natural resources. used for the processing and disposal of ash thermal power plants, burning low-reactive coals. The purpose of the invention is to improve the quality of the products of the separation of the fly ash of low reactivity coals. The initial ash pulp with a density of 80 g / t and ash content of 77.8% is hydroclassified in a high-pressure hydrocyclone in the boundary class of 40 μm. The resulting product with a particle size of 40 µm is floated at a pulp density of 200 to 350 kg / m in the presence of apolar substances and higher alcohols, such as the AAP-2 collector (flow rate of 1.3 kg / t) and T-66 foaming agent. (flow rate 0.2 kg / ton). The product with a particle size of less than 40 µm after thickening the pulp to a density of 200–350 kg / m is subjected to flotation also in the presence of apolar substances and higher alcohols with consumption of AAP-2 and T-66 reagents, respectively, 1.8 and 0.3 kg / t with the subsequent cleaning of the container. For the production of cellular ash concrete, carbon free ash with a specific surface area of 3000-35000 cm / g is required. It is obtained by mixing the mineral mass of classes 40 + 40 in the ratio of 2: 1. 1 hp f-ly. about (€ (L

Description

The invention relates to the field of environmental protection and the rational use of natural resources and can be used for the processing and disposal of the ashes of thermal power plants (TPPs) that burn low reactivity coals.

The aim of the invention is to improve the quality of separation products of low reactivity of coal.

Example. The initial ash pulp with a density of 80 g / t and ash content of 77.8% is subjected to hydroclassification in a high-pressure hydrocyclone in the boundary class of 40 μm. The resulting product with a particle size greater than 40 microns is subjected to flotation at a pulp density of 200-350. kg / m in the presence of apolar substances and higher alcohols, for example, an AAP-2 collector (a consumption of 1.3 kg / t) and a cspenyvatel T-66 (a consumption of 0.2 kg / t). The product with a particle size of less than 40 microns after thickening to a density, pulp 200-350 kg / m is subjected to flotation at a flow rate of reagents AAP-2 and T-66, respectively

Editor A.Vorovich

Compiled by E. Kiseleva

Tehred L. Oliynyk Proofreader V. But ha

2698/5

Circulation 511 Subscription

VNIIPI USSR State Committee

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

Production and printing company, Uzhgorod, Projecto st., 4.

1.8 and 0.3 kg / t, followed by cleaning the flotation concentrate.

Decarbonized fly ash with a specific surface area of 3000-35000 is required for the production of cellular ash. It is obtained by mixing the mineral mass of classes-40 +40 in the ratio 2: 1.

Claims (2)

1. A method for separating coal-containing product, which includes hydroclassification according to the class of 40 µm, flotation of a class less than 40 µm to obtain coal and mineral fractions, characterized in that, in order to improve the quality of the products; the separation of fly ash from low reactivity coals produces flotation classes of more than 40 µm, while flotation of both classes is carried out in the presence of apolar substances and higher alcohols. 2. Method POP1, characterized in that the flotation of both classes is carried out at a pulp density of 200 to 350 kg / m.