Methodof smelting Ti-IF steel withiron melt containing vanadium titanium

A vanadium-titanium and molten iron technology, applied in the field of metallurgy, can solve the problems of long process flow and high energy consumption, and achieve the effects of reducing energy consumption in the production process, improving quality, and realizing comprehensive steelmaking costs

Active Publication Date: 2018-12-18
HEBEI IRON AND STEEL
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Problems solved by technology

However, the above scheme has a long process flow and high energy consumption.

Method used

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  • Methodof smelting Ti-IF steel withiron melt containing vanadium titanium
  • Methodof smelting Ti-IF steel withiron melt containing vanadium titanium
  • Methodof smelting Ti-IF steel withiron melt containing vanadium titanium

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Embodiment 1-9

[0031] The invention provides a method for smelting Ti-IF steel by using vanadium-containing titanium molten iron, using vanadium-containing titanium molten iron to pre-dephosphorize, devanadium, and desiliconize through a vanadium-extracting converter, compound injection desulfurization, and decarburize and dephosphorize the steelmaking converter , RH refining process to obtain Ti-IF steel, the specific process is as follows:

[0032] (1) Pre-dephosphorization, vanadium removal, and desiliconization process: put the vanadium-titanium molten iron into the vanadium extraction converter, and perform pre-dephosphorization, vanadium removal, and desiliconization processes to obtain semi-steel I;

[0033] The vanadium-titanium-containing molten iron initial composition and temperature of this operation embodiment 1-9 are shown in Table 1;

[0034] The loading amount of molten iron, the lime addition amount, the scale addition amount, the oxygen supply amount of this process embodim...

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Abstract

The invention provides a method of smelting Ti-IF steel with iron melt containing vanadium titanium. Iron melt containing vanadium titanium is used as a raw material, and Ti-IF steel is obtained afterprocedures of pre-dephosphorization, de-vanadium, and desilication of a vanadium extraction converter, compound injection desulphurization, decarburization and dephosphorization of a steelmaking converter, and RH refining. The method solves the problems that, on the one hand, P content in the iron melt containing vanadium titanium is high, dephosphorizing by single converter smelting is difficult, and phosphorus content at the end point of the iron melt is high; and on the other hand, heat in the iron melt containing vanadium titanium is insufficient, the LF heating procedure is omitted by adopting the method of heat compensation, and nitrogen content in steel rising and procedure energy consumption in the LF heating process can be avoided. The quality of Ti-IF steel is improved, contentof T[O] in the steel is controlled to be reduced below 0.0020%, technology procedure is shortened, production efficiency is improved, and production procedure energy consumption is reduced.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to a method for smelting Ti-IF steel by using molten iron containing vanadium and titanium. Background technique [0002] IF steel is widely used in automobiles and high-end home appliance panels. The evaluation of the quality of IF steel depends on the control level of C, P, S, N and T[O] content, and it is required to have good cleanliness and low residual elements. , good ductility and surface quality, and the above composition indicators directly determine its ductility and surface quality. Therefore, it is difficult to smelt this steel type with ordinary molten iron, and it is even more difficult to smelt this steel type with vanadium-containing titanium molten iron. [0003] CN104060045A discloses a method for smelting low-oxygen and low-carbon IF steel with vanadium-titanium hot metal. The method includes the following steps: 1) blending vanadium-titanium hot ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C5/28C21C1/02C21C1/04C21C7/064C21C7/068C21C7/10
CPCC21C1/02C21C1/04C21C5/28C21C7/064C21C7/068C21C7/10Y02P10/20
Inventor 张明博耿立唐王宝华薛启河程玉君韩宇
Owner HEBEI IRON AND STEEL
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