Steel-making method using copper-nickel alloy

Abstract

The invention relates to a steel-making method using copper-nickel alloy. The method comprises the following steps: 1) pretreatment of molten iron; 2) carrying out oxygen-blowing and decarbonization by a top lance; 3) adding the copper-nickel alloy in a tapping process, controlling the adding amount at 0.628t per tank, beginning to add the copper-nickel alloy to a molten steel tank through an alloy slide chute by using an alloy tank with the copper-nickel alloy when the molten steel achieves 1/3 of the molten steel tank, adding while tapping, wherein the adding time is 1min; and 4) ensuring that the product steel contains 0.10-0.20% of Ni, and 0.25-0.35% of Cu after tapping. Compared with the prior art, the steel-making method has the beneficial effects that rapid alloying of the molten steel can be facilitated by adding copper-nickel alloy in the tapping process, the molten steel is accurate in ingredient, the labor intensity of a worker is significantly reduced, the investment time is reduced, the copper-nickel alloy is easy to melt in molten steel, and rapid to react, beneficial to transportation and storage, easy to divide, and convenient and fast to use, and the production cost can be reduced.

Description

technical field [0001] The invention relates to the technical field of molten steel smelting, in particular to a steelmaking method using a copper-nickel alloy. Background technique [0002] At present, for smelting weathering steel at home and abroad, electrolytic copper plates and electrolytic nickel plates are mainly used to increase the content of copper and nickel in molten steel for alloying, but there are no related reports on the use of other metal alloys. [0003] However, copper and nickel plates are not easy to transport, store and cut, and are not easy to melt in molten steel. Sometimes copper and nickel plates stick to the bottom of the furnace, which does not play the role of alloying, and the addition amount is not accurate, which is inconvenient to use, especially the price High, high cost. Contents of the invention [0004] The object of the present invention is to provide a copper-nickel alloy that is easy to transport, store, and split, and realize a co...

AI Technical Summary

Problems solved by technology

[0002] At present, for smelting weathering steel at home and abroad, electrolytic copper plates and electrolytic nickel plates are mainly used to increase the content of copper and nickel in molten steel for alloying, but there are no relevant reports on the use of other metal alloys.

[0003] However, copper and nickel plates are not easy to transport, store and cut, and are not easy to melt in molten steel. Sometimes copper and nickel plates stick to the bottom of the furnace, which does not play the role of alloying, and the addition amount is not accurate, which is inconvenient to use, especially the price high cost