In Iran, more than Midruck technology is used to restore pellet. This method is a direct reduction of iron ore with broken gases. As the natural gas first enters the gas deflation (refrigeration) unit, it is broken down due to heat and the presence of special catalysts and decomposes into H2 and CO. Hydrogen and released carbon monoxide are incorporated into the recovered furnace and combine with the oxygen present in the molten pellets and lead to the recovery of iron ore. In this method, the iron ore pellet, which has a 67% grade, is recovered and the resulting iron sponge (porous powder) is obtained by metallization fe (about 92 degrees). This method (Middlesex) is one of the most successful and well known methods in the world.
The DRI fine is separated using screens in the process of transmission from the direct reduction plant to the steel (smelter) plant. Then, small amounts of lime and silicate glue are added and the mix is compressed into briquettes in the briquetting machine. Due to their high rate of metallization and a proper weight, briquettes are used in the electric arc furnace to help with the melting.
One of the main considerations in production of briquettes is environmental in nature. In this regard, the DRI fine, which is a waste product in the process of production and transfer of DRI, is turned into briquettes, and after melting, it can be turned into steel ingots( DRI: Direct Reduced Iron)
