Assessment of wet oxidation of some indian coals

Abstract

The auto oxidation of coal ultimately leads to spontaneous combustion which is the major root cause for the disastrous of coal mine. It has been a major problem in the leading coal producing countries like Australia, India and China. Therefore the assessment for this combustion is very much necessary. It depends upon different characteristics and properties of coal. Once if the combustion of coal has been occurred, it is very difficult to control which also disturbs the environment of the surroundings of the mine. The spontaneous heating susceptibility of different coals varies over a wide range and it is important to assess their degree of proneness for taking preventive measures against the occurrence of fires to avoid loss of lives and property, sterilization of coal reserves and environmental pollution and raise concerns about safety and economic aspects of mining etc [3]. This project deals with the spontaneous heating tendency of coal using wet oxidation apparatus at various speed of magnetic stirrer. Five coals samples were collected from central Coalfields Limited (CCL) Limited and two coals from Mahanadi coal Limited (MCL) covering some coalfields of India. The collected Indian coals were prepared in a laboratory as per the Indian standards and the susceptibility indices were carried out at low, medium and high speed of magnetic stirrer using wet oxidation apparatus. The parameters of proximate analysis were carried out following the Indians standards and the best correlation was found out using MS Excel among the parameters of proximate analysis and the wet oxidation at low, medium and high speed of magnetic stirrer.