Patent ID: 7014678
Filing Date: 2006-03-21
Classification: C22B,Y02P,Y10S

Abstract:
1. A method of recycling mill scale from iron or steel to produce iron or steel, said method comprising the steps of: collecting mill scale from the production of iron or steel, said mill scale comprising mill scale, oil or similar mineral hydrocarbons, and water; adding a mixture of additives and absorbents to said mill scale to form a mill scale slurry, wherein the water content is 0.5 to 35 wt. % with reference to the total weight of the mill scale slurry, wherein said step of adding a mixture of additives and absorbents comprises: mixing said mill scale slurry; homogenizing said mill scale slurry; encapsulating and binding said oil, such that said oil is essentially only released at a temperature which is at or above an ignition point of a gas being discharged in a shaft furnace or converter to permit said oil to be essentially immediately combusted; heating said mill scale slurry during mixing to evaporate a proportion of the water to a proportion required for pelleting; agglomerating and pelletizing said mill scale slurry; recycling said agglomerated and pelletized mill scale slurry in an iron or steel production operation to permit combustion of components containing carbon; and producing iron or steel.