COMPLEX REAGENTS BASED ON INDUSTRIAL CONCENTRATES AROMATIC HYDROCARBONS FOR THE FLOTATION OF HIGH-ASH COALS

摘要

In article are presented results of investigation of developing of complex reagent based on side product of ethyl benzene formation and light gasoline of catalytic cracking for high-ash coals flotation process in central ore-dressing factory (COF) “Pechorskaya” JSOC “Vorkuta-Ugol”. It is discovered that on vat residue of ethyl benzene rectification has 70-90 % vol. in reagent, coal yield increases on 10-16 % wt., extraction of combustible matter increases on 10-17 % wt., accordingly. High activity of flotation reagent, in our view, is connected of the presence of vat residue of ethyl benzene rectification of polyethylbenzenes (bi- and three), with increased adsorption activity and high hydrofobization capacity in compared to paraffin-naphthenic and aromatic hydrocarbons in gasoline fractions. It is established that using complex reagent UKF-1 gets to increase yield of concentrate on 1.4 % wt. in compare with regime with separating entrance collector-reagent and frothing-agent. It is founded that more reliable flow for developed reagent regime is 1.6 kg /ton, coal yield has 59,6 % wt., ash content locates in possible levels and has 9,0-9,1 % wt. A further increasing of the flow rate of the reagent to 2.0 kg/t reduces the selectivity of the flotation process. It is defined main physic-chemical properties for offered reagent according to requirements and standarts for flotation reagents. It is offered principal technological scheme of flotation of coal with complex reagent, characterized with high-economical indicators.