The above study showed that the indices of the hot (after reaction with carbon dioxide) and mechanical strengths of metallurgical coke differently depend on its particle-size distribution. The CSR index decreases with increasing content of the large-size classes and the slope is close to a linear function. The maximum value of the CSR index is achieved for the elevated content of the 25-40 mm class in the coke bulk mass. The M_(25) index first increases and then passes through a maximum as the content of the large-size classes in the bulk mass of the metallurgical coke increases. The maximum value of the M_(25) index is achieved for the elevated content of the 40-60 and 60-80 mm classes. The M_(10) index for the coke bulk mass tests does not show any clear dependence on the particle-size distribution parameters of the metallurgical coke.
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