Nickel iron smelting process with nickel oxide ore and stainless steel production wastes as raw materials

Abstract

The invention relates to a ferronickel smelting technology which takes the production waste of nickel oxide ore and stainless steel as raw material. The ferronickel smelting technology comprises the following steps: the nickel oxide ore and the stainless steel with the grain diameter of below 15mm are smelted to remove dust and stainless steel acid cleaning sludge to obtain mixed ore by mixing; the mixed ore and coke powder and industrial honey are mixed to make lump ore; the lump ore is calcined to obtain calcined ore; the calcined ore and coke are sent into an ore heating furnace to obtain the ferronickel by smelting. The technology is a novel ore heating furnace ferronickel-smelting technology, and realizes the recycling and reuse of the production waste of the stainless steel, thus solving the pollution problem of the waste to the environment; simultaneously, elements such as the ferronickel, etc. in the production waste of the stainless steel can be effectively recycled, thus avoiding the waste of mineral resources; traditional solvents such as fluorite and dolomite, etc. are not needed to be used, thus reducing the discharging pollution of fluoride and the possibility of introducing other metallic impurities into the ferronickel; by adopting the technology of the invention, power consumption can be reduced by 300 degrees for producing one ton of the ferronickel.

Description

technical field [0001] The invention belongs to the field of ferronickel smelting technology, and in particular relates to a technology for smelting ferronickel by using a submerged arc furnace with nickel oxide ore and stainless steel production waste as raw materials. Background technique [0002] With the wide application of stainless steel and special steel, the main element of smelting stainless steel and special steel - nickel metal is in short supply and the price is soaring. At present, the world's proven nickel resource reserves are about 160 million tons, of which 30% are sulfide ores and 70% are nickel oxide ores. However, about 60% of nickel products currently come from sulfide ores. Traditional nickel metal production is mainly obtained from nickel sulfide ore. With the development of the global stainless steel industry, especially in China, the annual growth rate of nickel metal consumption will reach 5% in the next few years, but the current global nickel sulf...

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Problems solved by technology

The technical solution disclosed in this patent application uses nickel-chromium ore and nickel-chromium industrial waste as raw materials to produce sintered ore. The nickel-chromium industrial waste used includes stainless steel rolling skin, nickel extraction tailings, stainless steel steelmaking dust, etc. , the above-mentioned nickel-chromium industrial wastes are all powders with a particle size of less than 10 mm, and do not involve the recycling and reuse of other stainless steel production wastes, especially wastes with relatively low nickel content. Due to the large content of other components, all of them The recovery and reuse of the contained recyclable metal elements is relatively difficult; moreover, the technical solution disclosed in this patent application also needs to use a certain amount of dolomite and limestone

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