Author:Bonapace, ACDate:1973This paper discusses the potential function, critical conditions governing the phenomena of particle deposition, saltation, and the formation of dunes.Read more
Author:Erasmus, TCDate:1975This report is intended to be read at the fifth international coal preparation congress in sydney, Australia, in May, 1976.Read more
Author:Erasmus, TCDate:1972A mathematical model has been developed by means of which it is possible to predict the Tromp distribution curve at any mean separation specific gravity within the range 1,3 to 1,5. These curves serve as a reference against which the efficiency ...Read more
Author:Darazs, M; Clark, DDate:1976A literature survey has been carried out. Investigation into the growth of phosphatic deposits, using the Institute's experimental boiler plant, are reported.Read more
Author:Viljoen, GA; Kuhn, AH; Erasmus, TCDate:1974A sample of coal submitted by the Somerset Mining Company was treated in the Institute's coal preparation pilot plant as Pretoria West. The major portion of the relative density float product prepared in the Drewboy washer, was subsequently ...Read more
Author:Bonapace, AC; du Toit, PDate:1975Some physical expressions relating the parameters of the magnetic field have been derived. A description of the magnetic field was carried out by measuring the magnetic flux intensity at various points along the drum circumference and at ...Read more
Author:Vogel, JCDate:1938The high capital cost of coal hydrogenation plant makes it essential that oil output be maintained at high level as possible as this factor must primarily govern the choice of the coal to be used or the decision as to whether as coal is ...Read more
Author:Gaigher, JLDate:1976This report discusses an investigation of radio frequency ashing, micro-sieving in an ultrasonic bath and X-ray diffraction analysis, it is possible to determine the grain-size distribution of the mineral matter in a coal sample.Read more
Author:Heim, FO; Clark, DDate:1978This report discusses about an investigation which was aimed at improvement in fuel efficiency as a means of reducing smoke emission.Read more
Author:Saler, ADate:1972The investigation was undertaken as a preliminary study of the 4" Compound Water Cyclone, with regard to its separation efficiency, range of yields obtained and throughput capacity. The main purpose behind this work was to gain some experience ...Read more
Author:Raab, GADate:1974A knowledge of size distribution of the coal produced is of obvious interest to the coal industry and suppliers of mining and coal preparation equipment.Read more
Author:Erasmus, TCDate:1976The so-called reactivity index, a diminution of spontaneous combustion liability index, gives an indication of a coal's liability towards spontaneous combustion.Read more
Author:Erasmus, TCDate:1977Earlier studies have indicated that Umgala coal is prone to spontaneous heating and that ignition is likely to occur unless special precautions are taken during stockpiling.Read more
Author:Bonapace, ACDate:1977In this paper some hydraulic phenomena are discussed which are relevant to the hydraulic transport of particles in a fully suspended state.Read more