Constructional Improvements of FGX-1 Air Concentrating Table Aiming at Optimization of Operation

Abstract

The article contains information on operation of the air concentrating table of FGX-1 type. On the basis of the personal experience and reports in the literature the problems encountered during the operation of FGX units have been described. The causes of an excessive amount of refuse in the coal and an excessive amount of coal in refuse, as well as the excessive amount of the feed on the table’s deck and the impact of the changes in quality of raw coal feed on the effectiveness of the separation process have been discussed in detail. As a result of observation of the deshaling process the constructional changes of the FGX-1 air concentrating table were designed and implemented. These changes concerned: a new constructional solution of discharge dampers, installation of a curtain helping in separating waste fractions from middlings, increasing air flow, installation of a regulating flap on a feeder and covering the feeder with galvanized metal sheet. The implemented constructional changes resulted in significant improvement of effectiveness of the run-of-mine deshaling.