Reduction of sulfur dioxide emissions during blasting operations at pyrite mines

Abstract

One of the topical problems is considered - sulfur dioxide gas emissions during blasting operations at the pyrite deposits. All studies in this area to date have been reduced mainly to the solution of the problem of sulfide dust explosion accompanying blasting operations. It is known that an effective way to suppress explosive properties of sulfide dust is the use of special gas-dynamic blasting. However, this leads to an increase in the concentration of sulfide gas. It is proved that the solution to the problem of sulfurous gas emission is achieved by introducing an inhibiting additive into the explosive composition. In this connection, a model of the mechanism of inhibition of the combustion reaction of sulfide dust is considered. The main dependences of the influence of physical and chemical properties and inhibitor content on the sulfurous gas emission are presented. The charge design and explosive composition are proposed to reduce sulfur dioxide emission during blasting operations at colchedan deposits.