Smelting process for nickel-containing sponge iron

Abstract

The invention provides a smelting process for nickel-containing sponge iron. The smelting process includes the following steps that (1) raw materials mainly include 2.1wt.%-3.2wt.% of nickel, 2.4wt.%-3wt.% of chrome, 1.1wt.%-1.2wt.% of molybdenum, 0.85wt.%-1.1wt.% of tungsten, 0.01wt.%-1.1wt.% of yttrium, 0.35wt.%-0.4wt.% of silicon, 1wt.%-1.2wt.% of manganese, 0.025wt.%-0.035wt.% of sodium, 0.025wt.%-0.035wt.% of phosphorus, 1.1wt.%-2.2wt.% of silicon, 1.1wt.%-3wt.% of chrome, 1.1wt.%-1.2wt.% of molybdenum, 0.85wt.%-1.1wt.% of potassium, 0.01wt.%-1.1wt.% of calcium, 0.35wt.%-0.4wt.% of copper, 1wt.%-1.2wt.% of zinc, 0.025wt.%-0.035wt.% of chlorine, and the balance waste iron; (2) formed rough blanks are placed into reduction pots; and (3) the reduction pots filled with the rough blanks are brought into a smelting kiln together. According to the melting process for the nickel-containing sponge iron, a large block of meshed primary carbide is made to be subjected to necking and balling by adding rare earth; and through changes of the dimensions, forms and quantities of the primary carbide and secondary carbide, the service life of the nickel-containing sponge iron is prolonged.

Description

1. Technical field [0001] The invention relates to sponge iron in iron and steel smelting, in particular to a nickel-containing sponge iron smelting process. 2. Background technology [0002] Nickel is mainly used in alloys (such as nickel steel and nickel silver) and as catalysts (such as Raney nickel, especially as a catalyst for hydrogenation), which can be used to make currency, etc., and can be plated on other metals to prevent rust. It is mainly used to make stainless steel and other corrosion-resistant alloys, such as nickel steel, nickel-chromium steel and various non-ferrous metal alloys. Copper-nickel alloys with high nickel content are not easy to corrode. It is also used as a hydrogenation catalyst and used in ceramic products, special chemical containers, electronic circuits, glass green and nickel compound preparation, etc. It is an excellent corrosion-resistant material and an important alloying element in alloy steel. Due to the small reserves of nickel in t...

AI Technical Summary

Problems solved by technology

On the other hand, the by-products such as flue ash, lamination, and iron scale produced during the production of stainless steel in my country have been piled up and discarded in large quantities because there is no suitable recycling method so far, and cannot be recycled and reused.

Pile up and discard these wastes, not only need to occupy a lot of free space, but also cause serious environmental pollution