Determination of rational parameters of brown coal briquetting

Abstract

Brown coal is unstable during the storage and disposed to self-ignition. A great quantity of fine leads to the difficulties of transportation and the impossibility of burning in standard fire grate furnaces. The solution of a problem of underutilization of coal resources as a result of direct fuel utilization of run-ofmine coal is briquetting. New briquette composition including binder and filler was developed. Technological approaches include sizing of run-of-mine coal and briquetting of coal fine with the refinery waste and anthropogenic carbon-containing waste products of hydrolytic industry were designed. Technological and granulometric characteristics of brown coal and hydrolytic lignin were researched. Optimal parameters of coal briquetting were established. Influence of moisture content, binder proportion and briquetting pressure on briquette compressive strength were studied. Fundamental flow-sheet of fine coal briquetting with the addition of technical hydrolytic lignin as a fuel briquette filler and binder was developed. The technology was adopted for one of the deposits of Middle-Amur basin. It can be varied to fit another objects.