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Fuel Research Institute of South Africa (FRI) Collection: Recent submissions

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Recovery of magnetite from dilute suspensions in a pilot plant separator description of the magnetic field progress report no 3

Author: Bonapace, AC ; du Toit, P Date: 1975 Some 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
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
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
The mobile gas analysis laboratory of the Institute

Author: Joubert, FE Date: 1976 A mobile gas analysis laboratory has been acquired by the Fuel Research Institute. The purpose of this facility is to provide to the Inspectors of mines and to colliery managements an on-site gas analysis service during fire control operations. Read more
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
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
Evaluation of the reactivity of low temperature coke and char, containing volatile matter, towards carbon dioxide Part 1

Author: Von Woff, WTE Date: 1978 In the last few years there has been a growing interest in the reactivity of low temperature coke and char towards carbon dioxide. The equation of Hedden, derived for the calculation of the reactivity of metallurgical coke containing negligible ... 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
A report on investigations into the single - fuel, dual fuel and triple - fuel operation of a diesel engine

Author: Heim, FO ; Clark, D Date: 1978 This report discusses about an investigation which was aimed at improvement in fuel efficiency as a means of reducing smoke emission. 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
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
Stream transport of particles in full suspension. The energy dissipation function as an invariant of the concentration

Author: Bonapace, AC Date: 1977 In this paper some hydraulic phenomena are discussed which are relevant to the hydraulic transport of particles in a fully suspended state. Read more
Char production from bank coal for gas producer

Author: Myburhg, JJ Date: 1975 In August 1974, it was requested by the Combustion Department to produce a suitable char for use in their gas producer. It was decided to use Bank coal. The coal was washed at the Coal Preparation Pilot Plant on 19th Jul½ 1974 at a relative ... Read more
The dual fuel operation of a diesel engine, using ethyl alcohol as the secondary fuel

Author: Heim, FO ; Clark, D Date: 1977 In view of the desire to conserve oil products, it was decided to attempt to use ethyl alcohol in the place of petrol in a duel-fuel operated diesel engine. Apart from the change of fuel, test conditions have been as described in Report No. ... Read more
Interim report on minerals in coal - The direct determination of the mineral matter content in some coal product samples

Author: Gaigher, JL Date: 1976 The mineral matter factors for some coal product samples determined by the method of radio--frequency oxidation, compared with results from an earlier survey (Technical Memorandum No021 of 1971), appear to have an acceptable precision. Read more
Catalytic coal hydrogenation zinc slimes

Author: Davidtz, JC ; Gray, D Date: 1977 The selection and utilization of South African raw materials as catalysts in coal conversion depend on the availability of catalysts. Equally important is the -selectivity and activity of these materials for coal conversion. Read more
Hydrotreating of a coal-derived liquid. Part 1

Author: Barrass, G ; Davidtz, JC ; Gray, D ; Jezko, J ; Kershaw, JR ; Meinjes, AA Date: 1977 The +300 degrees Celsius boiling fraction of a coal-derived liquid produced by direct dry non-catalytic hydrogenation of Sigma coal was hydrotreated in the presence of a tailored Ni/W oxide on a synthetic layered silicate catalyst. Read more
Spontaneous heating of Umgala coal

Author: Erasmus, TC Date: 1977 Earlier 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
Identification of zircon from a deister table concentrate

Author: Gaigher, JL Date: 1976 Zircon, ilmenite and rutile have been identified by X-ray diffraction in a pyrite concentrate prepared from a Witbank coal by means of the Deister Table. Read more
Fluorescence spectroscopy in the characterisations of coal-derived liquids

Author: Kershaw, JR Date: 1977 The use of fluorescence spectroscopy as a qualitative analytical technique for the analysis of polyaromatic hydrocarbons in coal-derived liquids is reported. Read more

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