SYNTHESIS OF NEW BLOWING AGENTS FOR THE EXTRACTION OF PRECIOUS METALS FROM COALS OF THE ANGREN AND SHARGUN DEPOSITS
Keywords:
brown coal, peat, rare-earth and non-ferrous metals, ore, pulp, flotation reagents, slag, methoformism, surfactants, complexones, foam formers, ion exchangers, sorbentsAbstract
The article provides an overview of the metal content of coals in the Republic of Uzbekistan. The coals of the Angren and Shargun deposits are characterized by a high content of rare metals. Coal deposits have been discovered that have various rare earth metals in their composition. It has been established that the composition of Angren brown coal and Shargun black coal has the highest content of Aluminum (6-8%), Tungsten up to 2 wt.%, etc. The main patterns of their distribution and the conditions for the accumulation of rare earth elements (REE) in coal deposits are studied. The research data on the extraction of noble metals from brown and black coal of the Angren and Shargun deposits are presented. New SK-1 and SK-2 blowing agents based on cotton soap stock and amino alcohols, which have the best technological characteristics, were used as a flotation agent and blowing agent. Blowing agents SK-1 and SK-2 are used in the enrichment and flotation of non-ferrous and precious metal-containing coals. The reagents effectively lower the surface tension of the solution to σ= 28.5 MN/m and show a stable foaming capacity ѵ=265 ml; surface tension of reagent SK-2 σ= 30.5 MN/m; foaming capacity ѵ=260 ml.
