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Method of smelting low-phosphorus steel

A low-phosphorus steel and ladle technology, applied in the field of smelting low-phosphorus steel, can solve problems such as the deterioration of molten steel quality due to the temperature drop of tapping temperature, and the instability of tapping quality, so as to achieve the effect of avoiding quality deterioration and stabilizing the application effect

Active Publication Date: 2019-04-09
BEIJING SHOUGANG CO LTD
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Problems solved by technology

[0004] The invention provides a method for smelting low-phosphorus steel, which solves the technical problems in the prior art that the quality of steel in low-phosphorus smelting is unstable, and the quality of molten steel deteriorates due to the temperature drop of tapping

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Embodiment Construction

[0043] The embodiments of the present application provide a method for smelting low-phosphorus steel to solve the technical problem of unstable steel quality in low-phosphorus smelting in the prior art.

[0044] In order to better understand the above-mentioned technical solution, the above-mentioned technical solution will be described in detail below in conjunction with the description and specific implementation methods. It should be understood that the embodiments of the present invention and the specific features in the embodiments are detailed descriptions of the technical solution of the application, and It is not a limitation to the technical solutions of the present application, and the embodiments of the present application and the technical features in the embodiments can be combined without conflict.

[0045] This embodiment provides a method for smelting low-phosphorus steel, comprising:

[0046] Control steps of silicon dispensing in molten iron at the can dumpin...

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Abstract

The invention belongs to the technical field of steelmaking, and discloses a method of smelting low-phosphorus steel. The method comprises the following steps of a reladling station molten iron silicon proportioning control step, a waste steel selection and waste steel ratio control step, a converter loading amount control step, a converter blowing gun position, an oxygen supply strength and a bottom blowing flow comprehensive control step; a carbon content and a temperature control step in a smelting process, a semi-steel slag and final slag R and MgO% control step, an steel tapping slag discharging control step, as well as a steel ladle selecting and slag sticking quantity control step. According to the method of smelting the low-phosphorus steel has the advantages that parameters and procedures are optimized, under the condition that the molten iron and steel scrap are given, a qualified cast blank of a finished product which P is less than or equal to 0.005 percent can be producedfinally.

Description

technical field [0001] The invention relates to the technical field of steelmaking, in particular to a method for smelting low-phosphorus steel. Background technique [0002] With the continuous upgrading of steel products, many products have put forward higher requirements for phosphorus content, such as some steel grades require P≤0.006%, which poses a severe test for steelmaking production, how to control the phosphorus content of molten steel to meet low phosphorus steel Requirements are an urgent problem for smelting such low-phosphorus steel production enterprises. [0003] In the prior art, due to differences in equipment, molten iron, and raw and auxiliary materials, there are many different phosphorus control methods, mainly including single slag method, double slag method, blowing after pouring slag before tapping, etc. However, the phosphorus control stability of the single slag method fluctuates greatly, and it is difficult to meet the phosphorus content require...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C5/35C21C5/36C21C7/076
CPCC21C5/35C21C5/36C21C7/076Y02P10/20
Inventor 孙亮刘风刚毕泽阳李鹏程赵艳宇成天兵周立武王芸
Owner BEIJING SHOUGANG CO LTD
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