Nickel-iron smelting process from nickel oxide ore containing crystal water through blast furnace

Abstract

This invention provides a technology for smelting ferronickel of a nickel oxide ore containing water of crystallization including crushing and sieving the original ore to produce the powder to sintered ore blocks, in which, the sintered blocks, coke, limestone/calcium lime, dolomite and cand are mixed and matched to be smelted in a blast furnace to get the ferric nickel and the weight percentage of additive and the sintered ore blocks is: cand 0.3-20%, dolomite 0-8%, limestone/calcium lime 4-35% the blocks are crushed, sieved and magnetic-selected to get refined breezes to be sintered.

Description

Technical field: [0001] The invention relates to a blast furnace smelting process, in particular to a blast furnace smelting nickel-iron ore containing crystal water. Background technique: [0002] With the wide application of stainless steel and special steel around the world, the most important element for smelting stainless steel and special steel - nickel metal is in short supply, causing the price to soar. Traditional nickel metal production is mainly extracted from nickel sulfide ore, which accounts for 30% of the earth's nickel resources, and its production process is mature. However, after nearly a hundred years of continuous mining, the current reserves are insufficient and the resources are in crisis. Force people to pay more attention to extracting nickel metal from laterite nickel ore (nickel oxide ore), which accounts for 70% of the earth's nickel resources. The main reason why laterite nickel ore has not been developed on a large scale for a long time is that...

AI Technical Summary

Problems solved by technology

The one-time investment of this process equipment is large, the process is complicated, the cycle is long, and the environmental pollution is serious

It can also be smelted by blast furnace, but because lateritic nickel ore is often associated with Cr 2 o 3 composition, and the melting point of chromium is very high, which makes the molten iron viscosity high after melting, and the molten iron containing nickel and chromium cannot flow out smoothly, resulting in serious consequences of freezing and destroying the furnace

Many enterprises and research institutes at home and abroad have conducted research on the process of smelting laterite nickel ore into ferronickel (ferronickel) by one-step blast furnace for a long time, but there has been no successful report so far.

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