Browsing Faculty of Natural and Agricultural Sciences by Author "Nel, Marika V."
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Comparison of sintering and compressive strength tendencies of a model coal mineral mixture heat-treated in inert and oxidizing atmospheres
Nel, Marika V.; Strydom, Christien A.; Schobert, Harold H.; Beukes, J. Paul; Bunt, John R. (Elsevier, 2011)The chemical interactions responsible for sintering in a coal mineral mixture were investigated in air and in N2. A mineral mixture was made up by mixing kaolin, pyrite, quartz, calcite, hydromagnesite, FeCO3 and anatase ... -
Effect of sodium compounds on the sintering propensity of coal-associated minerals
Nel, Marika V.; Strydom, Christien A.; Schobert, Harold H.; Beukes, J. Paul; Bunt, John R. (Elsevier, 2015)This study focused on the chemistry involved in sintering of coal-associated minerals during combustion and inert conditions. Changes in mechanical strength were recorded with compressive strength measurements. This method ... -
Reducing atmosphere ash fusion temperatures of amixture of coal-associated minerals: the effect of inorganic additives and ashing temperature
Nel, Marika V.; Strydom, Christien A.; Schobert, Harold H.; Beukes, J. Paul; Bunt, John R. (Elsevier, 2014)The influence of the ashing temperature and inorganic additives on the reducing-atmosphere ash fusion temperatures of a mixture of coal-associated minerals was investigated. Different inorganic compounds were added to the ...