Sintering Technology for Iron ores and Optimization of Sinter Machine Design Oct19

Sintering Technology for Iron ores and Optimization of Sinter Machine Design...

Sintering Technology for Iron ores and Optimization of Sinter Machine Design  The technology of sintering in its most basic form is very simple and has been in use since early twentieth century. However, while the basic technology is simple, control of the process relies on a number of extremely complex interdependent process parameters and requires a thorough understanding of the effect of these parameters on production capacity and sinter quality. Basic sintering technology The sintering technology is basically an agglomeration process for the iron ore fines which is dependent on heat to melt the surface of the smaller particles together to form larger agglomerates. A typical sinter plant consists of a number of sequential operating units with the sinter machine at the heart of the plant. The simplified process sequence is as follows. Raw materials consisting of iron ore fines, coke breeze, slag modifiers such as lime stone, dolomite, manganese ore, lime, quartzite, and sand etc., and waste materials such as mill scale, screenings, dusts, sludges, and converter slags etc. are batched and conveyed to a blending system. The raw materials are blended in a rotating mixing drum after addition of sinter return fines and water to achieve a green feed for the a process. The mixing process is normally referred to as ‘nodulizing’. The nodulized green feed is charged to the strand of the sinter machine on top of a sized hearth layer to form the ‘sinter bed’. This bed passes through the ignition furnace (hood) to initiate the reaction. Burners in the hood ignite the carbon in the green feed charged in the form of coke breeze. The reaction is propagated by chemical reaction between the carbon and the air sucked through the sinter bed by the exhaust fans. The sinter burns...