Vestnik Naučnogo Centra po Bezopasnosti Rabot v Ugolʹnoj Promyšlennosti (Mar 2018)
INVESTIGATION OF CONCENTRATION INHIBIT ADDITION OF RESISTANCE TO CHEMICALS EMULSION EXPLOSIVES IN A PYRITE
Abstract
More than 70% of the assortment is occupied by emulsion industrial explosives. This type BB has both a wide range of advantages and disadvantages, for example, their limited use in sulphide ores.The aim of this work was to investigate the effect of the concentration of these additives on the chemical resistance of the emulsion matrix (EM) in pyrite media, as well as the effect of these inhibitors on the quality and "survivability" of the emulsion matrix.The non-sensitized EM of the "Poramit" type was used as the research object: ammonium nitrate - 66.5%, sodium nitrate-14%, water-12%, emulsifier SEM - 2%, diesel fuel - 5.5%. EM had the following parameters: density - 1.42 ± 0.01 g / cm3, electric capacity - 80-90 pF.EM was mixed with pyrite (P) in a ratio of 80:20 by weight, respectively. Inhibitors were administered in excess of the EM mass from 1 to 3%.The effect of the concentration of diphenylamine, urotropine, urea on the chemical resistance of emulsion explosives in pyrite was investigated.It was found that the inhibitors considered increase the stability of EM in the pyrite medium, depending on the concentration. Under equal experimental conditions, stabilization is achieved (at a pressure of 20-30 mm Hg) with the content of inhibitors: for DPA - 1%, for V - 2%, for M closer to 3%. At 2% DFA, the stability of EM in the pyrite medium is almost equal to the initial EM in the absence of pyrite.It was found that diphenylamine possesses the best inhibitory properties.It is shown that 2% of diphenylamine, urotropine, urea does not reduce the quality and "survivability" of the emulsion of pore emit.This work was supported by the Foundation for Assistance to Small Innovative Enterprises in Science and Technology (State Contract No. 11927U / 2017 of 04.07.2017).
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