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A PROCESS FOR THE RECOVERY OF CHROMIUM AND IRON OXIDES IN HIGH CARBON FERRO CHROME SLAG TO OBTAIN CHROMIUM AND IRON IN THE FORM OF SALEABLE METAL.
A PROCESS FOR THE RECOVERY OF CHROMIUM AND IRON OXIDES IN HIGH CARBON FERRO CHROME SLAG TO OBTAIN CHROMIUM AND IRON IN THE FORM OF SALEABLE METAL.
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机译：一种高碳铁铬渣中铬和铁氧化物的回收方法，以可销售金属的形式获得铬和铁。
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摘要
The conventional process for High Carbon Ferro Chrome in sub merged arc electric furnace has got a limitation of recovery of only 84-88% of input chromium in the metal, even after following the best process control methods. 12-16% of chromium is lost as flue dust in the fumes, as metallics entrapped in the slag and as unreduced and partially reduced oxides in the slag. Cr2O3 analyzed in slag is around 10-14%. Till date no economic method is found to recover chromium lost in the slag, in oxide form. An attempt is made to develop a process to recover chromium and iron present in the slag to an extent of 98% by smelting the liquid slag obtained in each tapping from the furnace as metal with addition of coke and flux in an electric arc furnace promoting reduction by adjusting the slag basicity to get about 100 kg additional saleable metal from each tonne of liquid slag and discarding final slag with only about 1 % to 2% Cr2O3.
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