SU1255582A1 - Composition for producing coal slurry flocculant - Google Patents

Description

The invention relates to the substance Shchimimenya1 1 for ossification of minerals sludge, and can be used at the beneficiation plants of the coal and coke industry.

The purpose of the invention is to increase the coefficient of selectivity of fl osu lta.

For the preparation of flocculants and

butadiene is used - 1,3 (divinyl) SI 2 - CH - CH CH.J, they say. masses 54-, 09 and styrene (vinylbenzene), mol. mass 104.14, which are introduced into the mixture to obtain a floc of lant in liquid form,

Potassium MTiinb disproportionate rosin (acid number, mg KOH not less than 162 is used as an emulsifier. However, sodium sulfonol alkylbenzenesulfate sulfonol and sodium β-acids of the fraction can also be used as erythrotape Example). Prepare five cm of this, consisting of butadiene, styrene, polyvinyl alcohol, and emulsifier with different contents of co-elements in the flocculant. The composition of flocs is given in Table 1.

Flocul nt is obtained in the following manner.

The mixture components are loaded into the apparatus-polymerizer in the ratio indicated in Table 1, in the following sequence: firstly loading) from the emulsifier with water, then styrene and butadiene are added and polyvinyl alcohol is added last. In the polymerization process, 11 and they are mixed at. Lymerizady process is completed at conversion of butadiene and styrene to 100%. The resulting floc nt is cooled in the same apparatus up to 20-30 ° C and unloaded,

The resulting flocculus nt and flocculo nt of known composition (bas) are tested on coal pulp.

PRI mme R 2. In the pulp volume of 500 cm and a density of 80 kg / m, with

containing mainly solid particles with a particle size of 1,500 microns and an ash content of 17.6%, floccules are added in an amount of 0.2 kg / ton of solids. The mixture is unmixed for 40 s in a mixer at a speed of 200 rpm. After settling for 1 min, a precipitate is obtained (coal concentrate and mineral silt

waste).

After separation in a separatory funnel, the products are dried in a drying cabinet at 05 s and their yield, ash content and selectivity coefficient are determined. The results obtained: i is given /) in the table. 2

Of. These data (Table 2) show that the most acceptable flocculant is flocculant of composition 3, characterized by a coefficient of selectivity of 0.937.

The output values of the content of flocculant components beyond the proposed limits (composition 1 and 5 leads to a dramatic snyukenie its properties.

Thus, the most effective floatant is flocculant composition 3, the use of which allows obtaining coal concentration of ash at 7.3% at a yield of 87% (ash content of waste is 84.6%).

PRI me R 3. It is carried out analogously to Example 2, but the indicated quantities are used as emulsifiers;

Table 3 presents the results of the experiments, from which it follows that all these substances have

properties of emulsifiers and almost the same extent can be used to prepare flotsulants.

A comparative analysis of flocculant of composition 3 and the known flocculant according to Table 2 shows that the proposed flocculant has a higher selectivity coefficient and improves the quality of the concentrate by reducing its ash content.

Table 1

Claims (1)

COMPOSITION FOR PRODUCING COAL Sludge Flocculant, including butadiene, styrene and an emulsifier, characterized in that, in order to increase the selectivity of the flocculant, it additionally contains polyvinyl alcohol in the following ratio of components, May.%: Butadiene 39.0-88.0 Styrene 55.0-4.5 Polyvinyl alcohol 1.5-3.0 Emulsifier Else ί