Abstract
This paper focuses on the determination of physio – chemical evaluation parameters of coal and their relative effects on physio – mechanical properties. Five different coal samples were acquired having an average particles size distribution which were grouped accordingly as run-of-mine coals (56.46mm), cobbles (70.86mm), nuts (41.38mm), peas (23.88mm) and fines (14.37mm). However, to estimate clear distinction in material composition, grade, rank, coal tenacity and presence of other microscopic lithotypes, the relative abundance of intrinsic species for each type were thus established using high-temperature tube furnace combustion chamber with infrared absorption instrument and other data acquire via Thermogravimetric Analysis testing equipment. Importantly, technological parameter that measure the relative hardness of coals and quality of product structure after comminution activity was done by using the ball – ring instrument that quantifies the Hardgrove grindability index (HGI) factor for each material type. The Ash content reflect the gross weight percentage of major and minor trace elements such as SiO 2 , CaO, Fe2O3, Al2O3, TiO2, K2O, Mn3O4, BaO, SrO, P2O5, SO3 etc., and our investigation revealed a strong interdependence to the HGI value that was increased from nuts, cobbles, run-of-mine samples, fines and lastly the Peas samples. The lower HGI factor indicates material resilience to fracture and the coal samples with high moisture content evaluation parameter increases the physio-mechanical properties of coal samples such as the compressive strength, tensile strength which are fracture toughness components. Nonetheless, production efficacy improvement, optimum processing parameter selection, metallurgical accounting on coal beneficiation performance, product quality pertaining to coal utilization and other assessments related to cost of production or energy of liberation etcetera are altogether valuable information drawn from the TGA and HGI independence coefficients.