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The analysis of oils from the hydrogenation and supercritical gas extraction

Author: Kershaw, JR Date: 1976 The oils from dynamic and static hydrogenation, supercritical gas extraction and soxhlet extraction were separated into a number of fractions by absorption chromatography on silica-gel. The fractions from this chromatographic separation were ... Read more
Beneficiation of fine coal in the republic of South Africa

Author: Fourie, PJF ; Erasmus, TC Date: 1977 The beneficiation of minus 0,5 mm coal in the Republic of South Africa is reviewed in terms of the availability of fines, the formidability of its cleaning, froth flotation, autogenous cyclones, tables, and dense medium cyclones. Read more
The hydropyrolysis (dry hydrogenation) of a selection of South Africa

Author: Barrass, G Date: 1978 A method utilising the "hot-rod" reactor has been employed to study the hydropyrolysis characteristics of a selection of South African coals. The effects of various operating parameters involved in this process have been investigated such as ... Read more
Interim report on mineral matter in coal - the reactivity of the mineral matter at room temperature

Author: Gaigher, JL Date: 1977 This report deals with the reactivity of mineral matter prepared from coal by the radio-frequency oxidation method, with the using X-ray diffraction to detect mineral phase changes, and possible react ion mechanisms. Read more
An investigation into improvement of coal ignition in chain grate stoker fired boilers

Author: Clark, D ; Darazas, M Date: 1978 During the investigation, three methods of preheating the green coal in the guillotine door area of the stoker have been tried. One of these has proved successful. In addition, a series of preliminary laboratory tests have been carried out ... Read more
An investigation into the ignition properties of the South African Pulverized coals

Author: Erasmus, TC Date: 1972 The present study is confined to investigation of the ignition phase of the combustion process and deductions must be seen in that light. Read more
The Maceral composition of the products prepared by the Collieries in the Orange Free State and at New Springfield in the Transvaal

Author: Moodie, B Date: 1974 A survey of the Maceral composition of the products prepared by the collieries in the Republic was initiated a number of years ago. The first report (Report No. 10 of 1974) dealt with the Maceral composition of the products prepared by the ... Read more
Mineral matter factors for fifty size coal product samples

Author: Gaigher, JL Date: 1977 The regional variation of mineral matter to ash ratios for some coal product samples is discussed by means of frequency weighted histograms. Read more
The reactivity index of sample of coal submitted by the Somerset Mining Company

Author: Viljoen, GA ; Kuhn, AH ; Erasmus, TC Date: 1974 A 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
Report no. 3 of 1976 the grain-size distribution of the mineral matter in a sample of -0.5 mm + 200 = Landau coal

Author: Gaigher, JL Date: 1976 This 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

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Browsing by Subject "Coals"

Browsing by Subject "Coals"

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