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Essay On Steel Industry

901 Words4 Pages

Steel is one of the most widely used materials in the world. It has wide ranging uses, from ships to automobiles, household furniture to safety-pins. Currently, the global steel production capacity is about 1.6 billion tons. However, it is also one of the most heavily polluting industries in the world, in terms of greenhouse gas emissions. The iron and steel industry is responsible for about 7% of the world’s greenhouse gas emissions, due to its heavy reliance on fossil fuels. Besides this, the steel industry also produces millions of tons of solid and liquid wastes, both in treated and untreated form, which contribute significantly to environmental pollution.
The only way forward to reduce the environmental impact of steel industry is to recycle and reuse the generated wastes, so that the life cycle is increased and the carbon footprint is …show more content…

It is also rich in hydrogen and methane and hence can be used to generate electricity or steam by utilising the chemical and sensible heat. Because of its peculiar chemical composition, coke oven gas is reducing in nature and currently is being used as a reducing agent for production of gas based sponge iron after refining. It can also be used as a fuel for generating power (by combusting it) in gas engines.
Blast Furnace Gas
Blast furnace has a calorific value of 800 kcal/m3 and hence cannot be used directly for generating power in gas engines. So, it needs to be blended with other gases to utilise it in the power plant. Recently, blast furnace gas has been utilised in integrated steel plants to drive a TRT (Top-pressure Recovery Turbine) to generate power.
Basic Oxygen Furnace Gas This has a calorific value of 2200 kcal/m3 and contains high amount of carbon monoxide (about 65%) and hence it is extremely toxic. At the same time it has high chemical heat and can be combusted to produce steam or power.
Hot Blast Stove Flue

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