Process and device for smelting ferronickel and nickel-containing molten iron by using lower-nickel materials

Abstract

The invention relates to a process and a device for smelting ferronickel and nickel-containing molten iron by using lower-nickel materials, which belongs to metallurgical industry steel-making raw material. The process comprises the following steps: mixing ferro nickel containing raw materials with reducing agent, solvent and catalyst to prepare ultra fine powder, mixing to make pelletizing materials, sending the pelletizing materials into a reducing furnace, obtaining chromium irons pellets after the reduction reaction, and directly adding reduced pellets into an lining electroslag furnace for being smelted into ferro nickel alloy or the nickel-containing molten iron. The device comprises an internal-external heating vertical reducing furnace, a lining electroslag furnace and a residual heat recovery system. The invention has the advantages that: firstly, the reduction temperature is low, the speed is high, the energy consumption is reduced, the production cost is lowered, the production efficiency is high, and the uniformity of the quality is good; secondly, the degree of mechanization is high, the procedure is simple, the yield is large, the mass production can be performed; thirdly, the waste of raw materials is reduced, the environment pollution is lowered; fourthly, the source of raw materials adopting nickel oxide ore or nickel-containing waste, the cost is low; fifthly, the waste resource can be recycled so as to save the resource consumption; and sixthly, the high-temperature pellets are directly smelted by adopting the lining electroslag furnace, the heat efficiency is high, the energy consumption is low, the material purity is high and the quality is good, and the device is simple with less investment.

Description

technical field

[0001] The invention belongs to the field of nonferrous metal metallurgy, and particularly relates to a process for smelting ferronickel and molten iron containing nickel with low-nickel-containing materials, and equipment for realizing the process. Background technique

[0002] Nickel is an important strategic metal and an excellent corrosion-resistant material. Nickel is not only the basic material for making nickel alloys, but also an alloying element in other alloys (iron, copper, aluminum-based alloys, etc.). Nickel is mainly used in the metallurgical industry and is an important alloying element in the production of stainless steel, special steel, high-temperature alloys, precision alloys and heat-resistant alloys. Nickel also has a wide range of applications in the fields of electroplating, magnetic materials, electronics, electrical appliances, electromagnetics and sensors, oxygen storage alloys, shape memory alloys, national defense and aviation, aer...

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