Title

Anomalias na avaliação do poder de coque em testes de laboratório.

Anomalias na avaliação do poder de coque em testes de laboratório.

Authorship

Pretor, Michael

Pretor, Michael

I am this author

DOI

10.5151/1TH-MEETING-COAL-1987-1987043

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Abstract

Laboratory carbonização tests such as the Plastômetro (Gieseler, Oribender, Sapozhnikov), Dilatômetro (Audibert - Arnu, Ruiu) and Swelling Index are designed to revelar the rheological behavior of coking coals under prescribed "experimental conditions". Tests such as the Gray-King Coke Type, Roga Index and Caking Index (previously British Standard, now under the Standard) are used para medir the caking (agglutinating) capacity of coking coals (also used under specified experimental conditions). All of these tests have become more or less reliable tools of industrial technology in the "old world", endowed with coking coals of the carbonífero. The geographical popularity of certain tests has been influenced by specific features of the indigenous coal until the advent of global trade in raw materials and industrial "know-how". The application of tests such as the Plastômetro or Gray-King Coke Type to coals of a different genealogy invariably underestimates the true coking capacity. In the introductory process between seller and buyer, success will not be easy with mediocre results. The purpose of this paper is to re-examine the "empirical" nature of some of these tests and highlight the potential misleading conclusions. The examples discussed pertain to a single seam coal deposit in the Southern Coalfields of New South Wales, Australia, which is of great commercial significance to the local steel industry as well as to a number of exporters.

Laboratory carbonização tests such as the Plastômetro (Gieseler, Oribender, Sapozhnikov), Dilatômetro (Audibert - Arnu, Ruiu) and Swelling Index are designed to revelar the rheological behavior of coking coals under prescribed "experimental conditions". Tests such as the Gray-King Coke Type, Roga Index and Caking Index (previously British Standard, now under the Standard) are used para medir the caking (agglutinating) capacity of coking coals (also used under specified experimental conditions). All of these tests have become more or less reliable tools of industrial technology in the "old world", endowed with coking coals of the carbonífero. The geographical popularity of certain tests has been influenced by specific features of the indigenous coal until the advent of global trade in raw materials and industrial "know-how". The application of tests such as the Plastômetro or Gray-King Coke Type to coals of a different genealogy invariably underestimates the true coking capacity. In the introductory process between seller and buyer, success will not be easy with mediocre results. The purpose of this paper is to re-examine the "empirical" nature of some of these tests and highlight the potential misleading conclusions. The examples discussed pertain to a single seam coal deposit in the Southern Coalfields of New South Wales, Australia, which is of great commercial significance to the local steel industry as well as to a number of exporters.

Keywords

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