Converter smelting process of HRB400cE corrosion-resistant steel

A converter smelting and corrosion-resistant steel technology, which is applied in the iron and steel manufacturing process, process efficiency improvement, metal processing, etc., can solve the problem of low smelting efficiency

CN112522469AActive Publication Date: 2021-03-19福建三宝钢铁有限公司

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Patent Information

Authority / Receiving Office: CN · China
Current Assignee / Owner: 福建三宝钢铁有限公司
Publication Date: 2021-03-19

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Abstract

The invention relates to a converter smelting process for HRB400cE corrosion-resistant steel. The converter smelting process comprises the following steps that a converter is checked; smelting raw materials are fed into the converter, and heating is carried out to liquefy the smelting raw materials in the converter into molten steel; an oxygen lance is inserted into the converter and introduces oxygen above the molten steel to decarburize the molten steel; the molten steel decarburization progress is judged according to the flame brightness and whether decarburization is completed or not is judged according to the oxygen lance outline definition; a carburant is added into the converter to primarily remove oxygen in the molten steel; the molten steel is conveyed to a steel ladle, and silicon-manganese alloy is added to conduct secondary deoxygenation on the molten steel; and corresponding types of metal are selected to perform alloying treatment on the molten steel. A preset matrix is established by using a central control processor, the oxygen introduction duration of the oxygen lance is determined according to the carbon content in the molten steel, so that the oxygen introduced by the oxygen lance just reacts with the carbon element in the molten steel, so that the molten steel is decarburized by using the specified amount of oxygen, the decarburization efficiency of the process for the molten steel is effectively improved, and therefore, the smelting efficiency of the process is improved.

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Description

technical field

[0001] The invention relates to the technical field of metal smelting, in particular to a converter smelting process for HRB400cE corrosion-resistant steel. Background technique

[0002] HRB400cE is the grade of threaded steel bar stipulated in "Steel for Reinforced Concrete" GB 1499.2-2007. Due to the wide range of standard components and the differences in production equipment and process control of manufacturers, the composition of HRB400cE hot-rolled ribbed steel bars produced by various manufacturers Each is different, and the production process of each steel factory is also different. In the prior art, the corrosion resistance of HRB400cE steel is usually improved by removing the carbon in the raw material or adding metals during the smelting process to alloy the molten steel. , at the same time, in the prior art, there is no way to accurately adjust the amount of oxygen in the process of passing oxygen to molten steel according to the carbon content i...

Claims

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