What is an iron ore without sintering?
The reason for sintering: in the past, iron ore can only be mined from the large iron ore out of the furnace. The fine powder can not be used in the furnace and piled everywhere.
The so-called iron ore sintering, is the fine iron containing material and fuel and flux according to a certain proportion of ingredients, add water, wet mixing granulation formation of mixture, the cloth to sintering equipment, through ignition, exhaust, fuel combustion and high temperature by means of a series of physical and chemical changes, generating material of low melting point, and softening melting produces a certain amount of liquid phase, iron mineral particles bonded together, after cooling, the consolidation into a certain strength of the porous block products - sinter. The sintering process has undergone the process of solid phase reaction, liquid phase formation and condensation and solidification. The size of iron ore or ore powder which needs sintering is generally large, and the optimum is from 3 to 6mm. By mining out of the rich iron ore block, as well as by crushing, magnetic separation concentrate grade and size selected in accordance with the requirements, including magnetite, hematite and limonite, siderite etc. can be counted as not sinter.
Slowly, large quantities of high-grade iron ore, less and less, iron ore, fine powder pile more and more. After many years, it was envisaged that the use of iron ore powder, and finally the sintering method to use iron ore powder.
