Steel plants generate a lot of waste every year. The common wastes of those are mill scale, dust, sludge, etc. As many of those by-products contain significant iron contents, they are considered for recycling. These by-product or residues need to be recycled by converting to briquette. It is a way useful for turning those waste to be used again in different furnaces like EAF, BOF, RHF or even a shaft furnace.
Why recycle those waste by briquetting
Briquetting is a kind of agglomeration to make those waste to a certain strength. In the waste agglomerating, several common ways are widely used: pelletizing, sintering, briquetting.
And briquetting is a way of low investment
Generation of iron waste from steel plant contain mainly blast furnace slag, blast furnace flue dust, sludge mill scale, etc.
It mostly aims to save energy and decrease the environmental pollution. The demands for briquetting are increasing as they have uniform size, shape, weight and composition which complete the requirement for the production process.
To get briquettes of the desired quality, we have to use binders. These binders hold the particles of the briquette together. There are various types of binders such as Portland cement, asphalt, pitch, sodium silicate, clay, plastics, sulphur liquor, lime, bentonite, tar, molasses, etc.
The mechanical properties of these briquettes are greatly affected by briquetting pressure, distribution of particle size and time of compressing. These parameters depend upon the composition of the briquettes.