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RESEARCH OF TRACE METALS DISTRIBUTION BETWEEN THERMAL TREATMENT PRODUCTS OF SOME COALS
https://doi.org/10.15518/isjaee.2015.23.004
Abstract
Distribution of the main trace microelements between thermal treatment products of some coals of Kuznetsk Basin in oxidizing and noble-gas environments was studied by means of the neutron-activation analysis (NAA). According to the results of NAA ashes resulting from burning mineral coal, gas-coal, forge coal and low-caking coal at 750-1000 °С in the atmosphere there is 0.2-0.3% of the total of rare elements, including 0.018-0.028% of Sb+Zn+Cr+Co+Ba+Sr, 100-450 ppm of Hf+Mo+Cs+Sc+Rb+Ta+rare elements, 6-42 ppm of U+Th, 0.03-0.07 ppm of Au+Ir. When coals are baked in the environment of N2 at the temperature of 700 °С, coal tars with such concentrated microelements as Sb (up to 1330 ppm), Zn (up to 370 ppm), Cr (up to 100-160 ppm), Au+Ir (up to 5.6 ppm) and 2.2-7.4 ppm of Ag are produced. It is shown that in dry residues of exhaust gases recovery, when all types of coals are burnt in nitrogen, Zn (40-205 ppm) and Cr (15-156 ppm) concentrate, while the content of Au and Ir in residues of forge coal and low-caking coal is 6.57 and 1.17 g/t correspondingly. The main peculiarity of burning mentioned types of coals in any gas environment is loss of micro elements not traced in the tars and residues of exhaust gases sluicing, which is equal to 16-34% from the initial amount in coals.
About the Authors
D. V. Kabanov
National Research Tomsk Polytechnic University
30 Lenin ave., Tomsk, 634050, Russia
Russian Federation
Russian Federation
junior researcher, National Research Tomsk Polytechnic University
V. G. Merkulov
National Research Tomsk Polytechnic University
30 Lenin ave., Tomsk, 634050, Russia
Russian Federation
Russian Federation
National Research Tomsk Polytechnic University, design engineer 1 category
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Review
For citations:
Kabanov D.V., Merkulov V.G. RESEARCH OF TRACE METALS DISTRIBUTION BETWEEN THERMAL TREATMENT PRODUCTS OF SOME COALS. Alternative Energy and Ecology (ISJAEE). 2015;(23):35-39. (In Russ.) https://doi.org/10.15518/isjaee.2015.23.004
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