ORIGINAL PAPER
The relationship between CRI and CSR indices and other quality parameters of coking coal from the “Pniówek” deposit (SW part of the USCB, Poland)
 
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Silesian University of Technology
CORRESPONDING AUTHOR
Marek Ireneusz Marcisz   

Silesian University of Technology
Submission date: 2019-02-27
Final revision date: 2019-08-26
Acceptance date: 2019-09-19
Publication date: 2019-09-19
 
Gospodarka Surowcami Mineralnymi – Mineral Resources Management 2019;35(3):163–184
 
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ABSTRACT
The paper presents the correlation between the CRI (Coke Reactivity Index), CSR (Coke Strength after Reaction) and the remaining 36 quality parameters of coking coal from the Pniówek deposit (SW part of the USCB). The test results were obtained for a region of fundamental importance to the Polish reserves of coking coal, characterized by highly variable coalification and quality parameters. The tests related to the determination of relationships of the CRI and CSR indices to other parameters were based on 25 channel samples acquired from active workings. The characteristics of the variability of the CRI and CSR indices were analyzed using statistical methods. The dependencies between the CRI and CSR indices and the parameters having an impact on their values were determined using linear correlation. An attempt was also made to determine the correlations between the concerned parameters using the multiple correlation method. The obtained results have been presented and compared to the results of globally conducted experiments in the form of charts presented by (North et al. 2018b). No clear dependence of the CRI and CSR indices was exhibited in case of most of the analyzed quality parameters, which is supported by low correlation coefficients of r < 0.5. The statistical analysis exhibited only 9 cases of correlation between CRI and CSR with other quality parameters, where the correlation coefficient was r ≥ 0.5, that is: Hta, Na2O, Al2O3 and SiO2, Mn3O4, daa and dra. This confirms the different characteristics of coal from the studied area, exhibited multiple times, that should be related to the specific coalification process, especially the occurrence of thermal metamorphism.
METADATA IN OTHER LANGUAGES:
Polish
Zależność między wskaźnikami CRI i CSR a innymi parametrami jakości węgla koksowego ze złoża "Pniówek" (SW część GZW, Polska)
CRI, CSR, węgiel koksowy, parametry jakościowe, Górnośląskie Zagłębie Węglowe
W artykule przedstawiono zależności korelacyjne pomiędzy wskaźnikami koksowniczymi CRI (Coke Reactivity Index) i CSR (Coke Strength after Reaction) a pozostałymi 35 parametrami jakości węgli koksowych w złożu Pniówek (SW część GZW). Wyniki badań uzyskano w obszarze o podstawowym znaczeniu dla polskiej bazy zasobowej węgli koksowych, która charakteryzuje się znaczną zmiennością jakości i uwęglenia. Badania związane z określaniem związków i powiązań wskaźników CRI i CSR z innymi parametrami, oparto na podstawie 25 próbek bruzdowych pobranych z czynnych wyrobisk górniczych. Charakterystykę zmian wartości wskaźników CRI i CSR analizowano z użyciem metod statystycznych. Zależności pomiędzy wskaźnikami CRI i CSR a parametrami mającymi wpływ na kształtowanie się ich wartości określono z użyciem korelacji prostoliniowej. Próbowano również określić współzależności pomiędzy analizowanymi parametrami metodą korelacji wielorakiej. Uzyskane wyniki przedstawiono na tle doświadczeń światowych zestawionych w postaci wykresów zaprezentowanych przez (North i in. 2018b). Wykazano brak wyraźnej zależności wskaźników CRI oraz CSR od większości analizowanych parametrów jakościowych o czym świadczą niskie wartości współczynników korelacji r < 0,5. Analiza statystyczna wykazała jedynie 9 przypadków korelacji CRI i CSR z pozostałymi parametrami jakościowymi, dla których wartość współczynnika korelacji r ≥ 0,5, tj.: Hta, Na2O, Al2O3 i SiO2, Mn3O4, dra i daa. Potwierdza to wielokrotnie wykazywaną odmienność węgli z obszaru badań, którą należy wiązać ze specyficznym przebiegiem procesów uwęglenia, a szczególnie z oddziaływaniem metamorfizmu termalnego.
 
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