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Composite cored wire for steelmaking and preparation method thereof

A cored wire and steel shell technology, applied in the field of metallurgical steelmaking, can solve problems such as affecting the purity of clean steel, and achieve the effects of reducing the probability of splashing, high desulfurization efficiency and improving quality

Inactive Publication Date: 2012-11-28
秦皇岛双轮环保科技股份有限公司
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Problems solved by technology

[0006] The above several cored wires can meet the technical requirements of steel refining, but new problems have arisen. The impurities such as O, S, P, C, and Si in the molten steel are removed from the molten steel and entered into the slag. When the O, S, P, C, Si and other impurities in the steel slag reach a saturated state, some of them will return to the molten steel to affect the purity of the clean steel. This requires that the steel slag should also be removed while removing the impurities in the molten steel. Impurities in

Method used

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Embodiment Construction

[0027] The technology of the present invention provides a production method of refined steel solid core composite cored wire. The production method is to passivate the calcium ingot, then heat and soften it, extrude the calcium wire through an extruder, and then pass the refining The steel slow-release agent is crushed into powder, the calcium wire and the slow-release agent are wrapped with a steel belt by a wrapping machine, and the cored wire is wound into a coil by a winding machine, and finally sealed and packaged.

[0028] The parameters of composite cored wire are as follows:

[0029] 1. Core-spun wire diameter: 11-14mm.

[0030] 2. Core wire composition (wt%): steel shell 45; calcium wire 15; slow release agent 40.

[0031] 3. Weight per meter (g): steel shell 190; solid core calcium 55 and slow-release agent 165.

[0032] 4. The chemical composition of calcium wire is: Ca≥96wt%, Fe≤0.015wt%, Ni≤0.004wt%, Cu≤0.0025 wt%, Mg≤0.65 wt%, Al≤0.6 wt%, Si≤0.012 wt%, susta...

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Abstract

The invention discloses a composite cored wire for steelmaking and a preparation method thereof, and aims to provide a deep slow-release deoxidization technology for clean steelmaking. Through the technology, impurities in molten steel and impurities in steel slag can be removed. The composite cored wire prepared according to certain component proportion and method steps has the advantages of high deoxidization efficiency and desulfurization efficiency, capability of reducing the calcium splashing probability, greatly improved yield in a calcium treatment process and reduced calcium treatment cost. Oxygen in the steel slag can be effectively removed, and oxygen in the steel slag is prevented from invading into the molten steel again after being saturated.

Description

technical field [0001] The invention relates to the field of metallurgy and steelmaking, in particular to a composite cored wire for clean steelmaking and a preparation method thereof. Background technique [0002] At present, powder core cored wire and solid core pure calcium wire have been widely used in steel production, and the usage of refined steel cored wire exceeds 70%. [0003] In recent years, with the rapid development of my country's iron and steel industry, the proportion of low-carbon and low-silicon steel grades has increased. It is required to deoxidize, desulfurize, change the shape of inclusions, promote the floating of inclusions, purify molten steel, and improve the pourability of molten steel during calcium treatment. In addition to functions such as anti-corrosion properties, it is also required that no other substances be added to the molten steel, which will affect the purity of the clean steel. Since aluminum-calcium wire, silicon-calcium wire, etc. ...

Claims

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Application Information

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IPC IPC(8): C21C7/00
Inventor 姚博闻姚殿宝
Owner 秦皇岛双轮环保科技股份有限公司
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