Protection of Environment in an Integrated Steel Plant...

Protection of Environment in an Integrated Steel PlantĀ  The processes of an integrated steel plant are highly resource intensive, consequently emitting and discharging pollutants and therefore, the cause of environmental concerns. They have a variety of impacts on the environment. The main impacts come from the use of energy and raw materials, which result in emissions such as carbon dioxide (CO2), sulphur oxides (SOx), nitrogen oxides (NOx), dust emissions to air. Water is used throughout the plant for cooling or heat transfer of heat processing equipment. Water is also required for descaling, dust scrubbing, quenching and other processes. Direct contact water gets contaminated during use and when this contaminated water is discharged from the plant, it impacts the environment. Also solid wastes generated during the plant operations, need dumping in the land filling area. These wastes also have its effects on the environment. One more factor which affects the environment is the noise which is produced during the plant operations. In short, thera are four types of pollutants which are affecting the environments (Fig 1). These are (i) air emissions, (ii) liquid effluent discharges, (iii) solid waste dumping, and (iv) generation of noise. Fig 1 Types of pollutants affecting environment The steel plant is required to be in compliance with regulations for meeting both generic standards for air, water, noise, waste management as well as specific standards for steel industry. The plant is required to meet the environmental norms for coke ovens, sinter plant, blast furnace, steel melting shop, rolling mills etc. for stack emissions, fugitive emissions and effluent discharges. It is also to comply with the ambient air quality standards. The steel plant is to take measures to improve its environmental performance not only for complying with the statutory environmental norms but also...