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Item Analyses of samples from boreholes 2 and 3 on "Bankfontein 503" near Uitkyk, Transvaal(1936) Hall, PEThese two borehole were sunk by the Minnaar-Witbank Colliery during February 1936.Item Preliminary report of samples of No. 4 seam from borehole cores put down on Klipplaat 47, Tweefontein 69 and Waterpan 68 by Tweefontein United Collieries Limited(1937) Vogel, JCSamples of No. 4 seam were obtained from seven boreholes. The cores were, in part, broken and incomplete.Item A contribution to the study of the production of carbonaceous zeolites from bituminous coal(1944) La Grange, CCThis report described work done at the Institute to ascertain whether South African coals could be used in the preparation of carbonaceous zeolites. The object of the present investigation was to determine whether South African coal would provide a suitable raw material for the production of zeolites.Item The breakage of South African coal during preparation, haulage and shipping(1945) Tromp, FJ; Bushell, LAWork published by the FRI shows that the relative friability or the relative ease of disintegration of coal, can be measured by its shatter index.Item Combustion tests on South African anthracite and coal(1946) Quass, FWIn order to establish the relative suitable for steam raising purposes of South African anthracite, firing tests were carried out in an experimental furnace on a number of nut size largely on the anthracite.Item A graphical method for assessing the relative suitabilities of coal washing processes from float and sink and relevant data(1949) Van der Walt, PJThe problem of predicting practical yield and ash values when washing coal in a specified type of washer based on float and sink data obtained from laboratory tests is discussed in this report.Item The physical and chemical survey of the No.4 seam at Alpha Colliery, district Witbank, Transvaal survey(1949) Berry, HThe No. 4 seam at this colliery, judging from the diagrammatic representations at the end of the report, appears to maintain a uniform structure and a fairly consistent thickness throughout the mine.Item Some economic aspects of the production and transmission of manufactured gas(1949) Doornum, GAWUtilization of the Union's low grade coal reserves may be considered to be of great importance for the industrial development of the country, and the generation of electric power at the pithead shows a way in which this can be accomplished. Technical considerations have only been introduced where they bear directly on the economic aspects, which form the main substance of this report.Item Investigation of the possible formation of explosive mixtures during the impregnation of timber(1950) Blitz, JG; Uys, JM; Petrick, AJThe introduction of oil mixtures for impregnating timber in which penta-chloro-phenol is the active medium and kerosene the major vehicle component caused some apprehensive that explosive mixtures might be formed in the impregnation vessels.Item Oil bearing sandstone obtained from boreholes No. 1 on Kalabasvlakte 3749 Newcastle district(1950) Davis, PC; La Grange, CC; Coetzee, SDDuring September 1950, the Institute was notified that portions of the core from a borehole drilled on the farm Kalabasvlakte 3749 were apparently impregnated with oil. Samples of the core were obtained and examined and it was conducted that this oil was of natural origin having the characteristics of a paraffin base crude oil.Item The effects of cleaning on the analsis composition of the ash and ash fusion point of two coals from collieries in the South-Eastern portion of Witbank coalfield(1950) Savage, WHDThe work incorporated in this report was undertaken because of the introduction of new grading regulations governing the export of col from the Union, in which minimum analytical requirements for the several grades of coal were laid down.Item Washability and other characteristics of coal from the No. 5 seam Witbank colliery(1950) La Grange, CC; Wolmarans, JJA bulk face sample (no. T124) of approximately 1 ton was taken on 12/4/1950 from the No. 5 seam, South African Witbank colliery at a point about 70 east of a point 100 south of peg 104. The seam here was about 69'' thick.Item A study of the operation of the cyclone washer and its application to Witbank fine coal(1950) Van der Walt, PJAlthough the union of South Africa possesses reasonably large reserves of coal of various qualities, the reserves of coking coal are comparatively small and are being exhausted at an alarming rate. The proven reserves of coking coal are estimated at about 260 million tons, of which 160 million tons are in Natal and 100 million tons in the Transvaal.Item Washability and other characteristics of coal from the No. 5 seam coal (Run-of-mine) from nagcolliery(1950) La Grange, CC; Wolmarans, JJAccording to information given by the Manager at navigation Colliery in May 1950, the mining height in the No. 5 seam is about 6 feet at the top of this consist of inferior material and is loaded into separate, specially marked tubs underground and sent direct to the waste dump on arrival at the surface.Item Routine methods of coal analysis the determination of the calorific value of a coal(1950) Coetzee, SDThe method adopted at the Institute is that laid down by the S.A. standards specification c.f. “The determination of the comparative calorific values of coals in South Africa.”Item The normal and halogen inhibited combustion at 850 °C of cokes of varying ash content(1950) Shuttleworth, RGThe combustion of carbonaceous fuels is now recognized as occurring by means of both a heterogeneous reaction and a homogenous reaction.Item Spontaneous heating of coal - summarized extracts from the literature(1950) La Grange, CCThe problem created by the spontaneous heating of coal has been receiving attention for more than 100 years and many investigators have worked on problems directly or indirectly associated with this phenomenon.Item Chlorination tests on South African coals(1950) Beyers, E; Van Rooyen, DComparatively few investigators have studied the reaction of halogens with coal. Evidence was found that substitution and addition reactions occur and that more hydrochloric or hydro bromic acid may be formed than could be explained by a substitution reaction.Item Weathering tests on coking coals(1951) Savage, WHDThe object of the investigation was to study the effect of weathering by exposure to the open air on the coking and chemical properties of the coal.Item Storage of coal with special reference to quality determination and spontaneous combustion(1951) La Grange, CCAlthough the storage of coal is probably almost as old as its use and is practiced on a smaller or larger scale by all coal consumers, there are certain aspects and problems associated with coal storage, which require very careful consideration and attention.