G. Atesok et al., APPLICABILITY OF THE REICHERT SPIRAL FOR CLEANING BITUMINOUS AND LIGNITIC COALS - A PILOT-SCALE STUDY, International journal of mineral processing, 40(1-2), 1993, pp. 33-44
Citations number
14
Categorie Soggetti
Mineralogy,"Metallurgy & Mining","Engineering, Chemical
The Reichert spiral which has been particularly developed for the bene
ficiation of fine coal in the size range of -3+0.1 mm is considered as
an alternative for fine coal jig, cyclone, and flotation. A systemati
c study has been carried out to test the separation efficiency of the
Reichert spiral on a bituminous coal and lignite. The effect of partic
le size, pulp density, the presence of fines, and the number of cleani
ng stages has been studied as a function of separation density. It is
shown that cleaning of coal at densities below 1.5 g/cm(3) seems ineff
icient under optimum operating conditions. The Reichert spiral is capa
ble of cleaning the bituminous coal more efficiently than lignite in v
iew of the smaller number of cleaning stages. Lignite, however, requir
es lower separation densities compared to the bituminous coal. The eff
ect of various parameters on spiral performance is delineated with the
aim of developing an optimum strategy for cleaning low quality coals.