Laterite-nickel sintered ore for blast furnace and preparation process

• Main Authors: LUO JUN, LIU GUANGYONG, DONG XINGHONG, ZHENG JIAKUI, HU QIANSHENG
• Format: Patent
• Language: Chinese; English
• Published: 14.05.2021
• Subjects: CHEMISTRY; FERROUS OR NON-FERROUS ALLOYS; MANUFACTURE OF IRON OR STEEL; METALLURGY; METALLURGY OF IRON; PRETREATMENT OF RAW MATERIALS; PRODUCTION AND REFINING OF METALS; TREATMENT OF ALLOYS OR NON-FERROUS METALS

The invention discloses a laterite-nickel sintered ore for a blast furnace and a preparation process. The preparation process mainly comprises the following steps: mixing limonite-type laterite-nickel ore with a flux, a fuel, return mine and an auxiliary material, and conducting granulating and sintering to obtain the sintered ore for the blast furnace. The obtained finished sintered ore comprises 48%-55% of TFe, 3.5%-6% of Cr2O3, 0.8%-1.3% of Ni, 5%-6% of Al2O3, and 5%-7% of SiO2, wherein the mass ratio of MgO to Al2O3 is 0.4 to 0.6, the mass ratio of binary alkalinity CaO to SiO2 is 1.0-1.4, and the mass ratio of quaternary alkalinity (CaO + MgO)/(Al2O3 + SiO2) is 0.8-1.2. By optimizing the ore blending of the limonite type laterite-nickel ore, the production quality indexes, such as the yield and the drum strength, and the metallurgical performance of the sintered ore are remarkably improved, the solid fuel consumption in the sintering process is reduced, and high-quality furnace charge is provided for bla