PROCESS AND APPARATUS FOR A THERMAL PRETREATMENT OF COKING BITUMINOUS COAL

摘要

The present process prepares coking bituminous coal for the subsequent briquetting operation by subjecting the coal, which has a swelling index smaller than five, in granular form with a grain size of up to 14,000 mu to a heating treatment in a hot gas stream. The temperature is regulated in such a manner that an average heat-up speed of about 1,000 DEG C per second is assured, whereby the final temperature is about 400 DEG C. The present process is performed in an elongated tubular member. The granular coal and a hot gas stream are supplied to one end of the tubular member and a particle gas separator at the other end of the tubular member separates the pretreated product from the exhaust gas. For the control of the temperature intermediate inlet means, one or several, are arranged between the ends of the tubular member for supplying additional granular material into the tubular member.