RU1779407C - Viscosity regulating reagent of aqueous separating medium during coal jugging - Google Patents

Abstract

The purpose of the invention is to increase the technological parameters of the process of hydraulic deposition of coal. A mixture of components of an aqueous suspension of copolymerization products of butadiene and styrene with purified phenolic wastewater of coke production, taken in a ratio of 1: 7-1: 12, is used as a reagent-regulator of the properties of the aqueous separation medium. 3 tab.

Description

FIELD OF THE INVENTION The invention relates to coal enrichment by hydraulic deposition and can be used in the coke and coal industries.

The aim of the invention is to improve the technological parameters of the process of hydraulic deposition.

A reagent based on an aqueous dispersion of copolymerization products of butadiene and styrene, additionally containing purified phenolic wastewater of coke production, taken in the ratio to an aqueous dispersion equal to 1: 7-1, is used as a reagent-regulator of the properties of the aqueous separation medium of gravity coal enrichment by the precipitation method. :12.

By the term "aqueous dispersion of copolymerization products of butadiene and styrene" is meant a dispersion formed by emulsion polymerization of butadiene and styrene in the presence of water and a nonionic organic emulsifier.

To prepare the products of copolymerization of butadiene and styrene used:

Butadiene-1,3 (divinyl) СН-СНа, mol. 54.09 (OST 38-3-71) was introduced into the mixture in liquid form;

Styrene (vinylbenzene) СНН-СН-СНа. Mol. 104.14 was also introduced into the mixture in the form of a liquid (GOST 10003-76).

Emulsifiers used were: potassium disproportionate rosin soap (TU-38.103261-75), Acid number, mg KOH per 1. not less than 162 and synthetic fatty acids of the Csu-Cs fraction (OST 38.7.25.73 with changes of 1976).

The dispersion of the copolymerization products of butadiene and styrene is obtained as follows.

The components are loaded into the polymerization apparatus: first, a surfactant with water, then styrene and last butadiene. The polymerization process is completed at 100% conversion of butadiene and styrene. Received

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the product is cooled in this apparatus to 20-30 ° C and discharged.

The compositions and properties of the tested dispersions of the copolymerization products of butadiene and styrene are given in Tables 1 and 2.

The composition of the purified phenolic wastewater is given in table.3.

The introduction of a dispersion of copolymerization products of butadiene and styrene and purified phenolic wastewater of coke production into the aqueous precipitation separation medium reduces the viscosity of the medium, which increases the influence of gravitational force on the separation of enriched grains. This makes it possible to increase the yield of concentrate and the ash content of the waste, and thus reduce the loss of coal from the waste.

Example. The mixture of copolymerization products and purified phenolic water was stirred for 2 min in a mixer at an impeller rotation speed of 1000 rpm, and the coal pulp was mixed with a reagent-regulator for 2 min with an impeller rotation speed of 1000 rpm ./min

Hydraulic jigging was carried out in a laboratory jigging machine of the UKHIN design with a capacity of 1 t / h. The reagent consumption (in terms of water dispersion) was in the range of 20-200 g / m of dividing aqueous medium (40-400 g / t of coal angle).

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A sample of the aqueous medium of the depositing process was determined to determine its viscosity after 2 minutes of mixing the coal pulp with a reagent-regulator.

The actual viscosity of the separation of the native environment // deposition process was determined by the formula

-tatЈn 2 where / L & - water viscosity depending on the solid content (tabulated values), N s / m2;

te is the expiration time of the water from the viscometer, s.

When conducting studies used a viscometer type VZ.

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Claims (1)

SUMMARY OF THE INVENTION Reagent-regulator of viscosity of an aqueous separation medium during the enrichment of coal by deposition, comprising an aqueous dispersion of copolymerization products of butadiene and styrene, characterized in that, in order to increase the technological parameters of the process of hydraulic deposition, it additionally contains purified phenol wastewater of coke production with a ratio of it to an aqueous dispersion of copolymerization products of butadiene and styrene from 1: 7 to 1:12. Table 1 Name of components Phenols Volatile ammonia Ammonia common Rodanides Cyanides Chlorides Sulphates iridine bases thiosulfates pH Oxidation table 2 Table 3 Concentration, mg / l fifteen 130-280 500-1350 fifteen fifteen 840 - 2800 800-1300 70-100 140-500 7.7-8.7 50 - 300 mg 02 / L