Reduction Smelting Low Ferronickel from Pre-concentrated Nickel-Iron Ore of Nickel Laterite

Abstract

The research of smelting low ferronickel from pre-concentrate nickel-iron ore with 2.76% Ni and 38.00% Fetotal was carried out to find an effective way for stainless steel enterprises to use the low-nickel laterite reasonable. The results show that Ni and Fe both have a certain degree of enrichment, and impurities and harm elements have different degrees of reduction after pre-concentration of nickel-iron ore. Most valuable metal did not compound with impurities which greatly accelerated the speed and extent of melt separation reduction. Good alloy of 6.58% Ni with the overall recoveries of 93.38% and 89.95% Fetotal with the overall recoveries of 89.57% was manufactured under the following conditions: 10% coke, 1.0 binary basicity, 18% MgO and 3% Al2O3 in slag, melting at 1,550°C for 10 min. The product can be used for the feed of producing stainless steel.