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 materials. The ferronickel smelting technology comprises the following steps: the production waste of the nickel oxide ore and the stainless steel with the grain diameter of below 15mm are mixed to obtain mixed ore; coal dust and a solvent are added into the mixed ore to obtain sintering ore by sintering; the sintering ore and coke are mixed and loaded into a blast furnace to obtain the ferronickel by smelting. The technology is a novel blast furnace ferronickel-smelting technology, which takes the production waste of the nickel oxide ore and the stainless steel as the raw material, thus realizing the recycling and reuse of the production waste of the stainless steel, and 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; furthermore, no dolomite with higher price is needed to be used, thus not only reducing the possibility of introducing other metallic impurities into the ferronickel, but also effectively reducing the cost of smelting.

Description

technical field [0001] The invention belongs to the field of ferronickel smelting technology, and relates to a process for smelting ferronickel in a blast furnace using 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 sulfide ore resources have emerged...

AI Technical Summary

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 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 Contains recyclable metal elements that are relatively difficult to recover and reuse

Images