SU65613A1 - Method of smelting nickel or nickel-copper iron - Google Patents

Description

Nowadays, nickel is introduced into alloyed steels, as well as into iron and steel castings in the form of technically pure nickel or in the form of chromium-nickel non-ferrous.

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The method of obtaining technically pure nickel from nickel ores of the road has a complex technological scheme associated with significant nickel losses and high costs of redistribution.

The method of obtaining chromium-nickel iron from nickel ores is cheaper, has a simpler technological scheme, but differs in the following, they have negative features:

1) cobalt contained in nickel ores is lost;

2) chromium containing nickel ores in the nickel ores goes into pig iron, which limits the scope of chromium-nickel iron as a substitute for nickel and significantly reduces the productivity of steel-smelting aggregates when chromium-nickel iron is used in the production of alloyed steels;

3) the productivity of blast furnaces in the smelting of chrome-nickel iron from the poor in iron nickel ores is sharply reduced.

Infusion, by the invention, proposes that when preparing a blast furnace, nickel as well as nickel-copper iron, replacing metallic nickel in the production of alloyed steels, iron and steel castings, in a mixture, except iron ore, 1, to introduce a finstein or rotstein.

Nickel (or copper-nickel) ore is smelted in a vaterzhaketpy furnace, with the result that nickel and cobalt are transferred to the rodstein, and the rock and chromium are irehodig to slag.

Rothstein is blown into a converter matte in order to extract cobalt into the slag, as well as partial desulfurization.

Feinstein, which is practically free of chromium, phosphorus and cobalt, and is subjected to desulfurization in blast furnaces, for which it is added to the long-lasting mixture, whose composition differs from the usual high content of 1 desalting and thinning sclac additives. At the same time, the by-product desulfurization of cast iron can also be used.

Prior to loading into a blast furnace, the fabric can be subjected to preliminary desulfurization either by partial roasting, or by processing with desulfurizing agents, or by over-blowing in the converter (slag from nickel-containing peat is used in blast furnaces).

The resulting blast smelting nickel or nickel-copper iron, pure in chromium, phosphorus, sulfur and cobalt, will find widespread consumption and is an excellent material replacing nickel in the production of alloyed steel, iron and steel castings.,

The advantage of the proposed

The method as compared with the methods implemented in non-ferrous metallurgy is a simplification and reduction of the technological process,; as well as reducing nickel losses.

In the case of the co-smelting of cobalt-free nickel ores, or in the case where cobalt contained in nickel ores is not planned to be used instead of fines, rotstein may be further processed.

Subject invention

The method of smelting nickel-plating nickel-copper iron in a blast furnace, characterized in that a metal container, besides iron ore, is injected into a metal container or a container.