Process utilizing sheet billet continuous casting to manufacture low aluminum silicon calm carbon structural steel

A technology of thin slab continuous casting and silicon-killed carbon, which is applied in the field of iron and steel smelting technology, can solve the problems of long production cycle, increased manufacturing cost, and excess product functions, and achieve excellent quality, small liquid level fluctuations, and reduced production costs. Effect

Active Publication Date: 2013-10-02
HEBEI IRON AND STEEL
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Problems solved by technology

In this way, the production of carbon structural steel for general structure is short, the production cycle is long, the manufacturing cost is increased, and the product function is redundant.

Method used

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  • Process utilizing sheet billet continuous casting to manufacture low aluminum silicon calm carbon structural steel
  • Process utilizing sheet billet continuous casting to manufacture low aluminum silicon calm carbon structural steel

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Embodiment Construction

[0013] The present invention will be further illustrated by the following examples.

[0014] In the embodiment, the process flow for producing low-aluminum-silicon killed carbon structural steel by thin slab short process is: blast furnace hot metal→converter smelting→LF refining→thin slab continuous casting.

[0015] Example converter 150t, LF refining 150t, thin slab continuous casting: continuous casting slab width 1250-1500mm, thickness 65mm, production of low-aluminum silicon killed carbon structural steel, a total of six examples.

[0016] The specific operation steps and process parameter control of each process are as follows:

[0017] (1) Converter smelting process

[0018] a. The temperature of molten iron is 1350℃, S=0.030%, P=0.120%;

[0019] b. The main goal of the conversion process is dephosphorization, and the slagging process is required to increase the furnace temperature steadily;

[0020] c. Final slag basicity R is 3.0-3.5, molten steel composition (mass percentage) C...

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Abstract

The invention relates to a process utilizing sheet billet continuous casting to manufacture a low aluminum silicon calm carbon structural steel, and belongs to the technical field of steel smelting processes. The technical scheme comprises a blast furnace molten iron process, a revolving furnace smelting process, an LF refining process and a sheet billet continuous casting process. The chemical components of the carbon structural steel is redesigned, the deoxidation alloying manner of the revolving furnace smelting process and the LF refining process of the idiomatic aluminum silicon calm carbon structural steel manufactured by the sheet billet continuous casting, under the premise that liquid steel fully deoxidizes, and the low aluminum silicon calm carbon structural steel in a sheet billet short process meeting a standard requirement is manufactured. The process provided by the invention has the beneficial effects that a sheet billet continuous casting process is adopted to manufacture the low aluminum silicon calm carbon structural steel, high quality hot rolling plates meeting the standard requirement for general carbon structures are manufactured through redesigning the chemical components and optimizing a deoxidizing alloying process, the production time is shortened, the production cost is reduced, and the huge economic benefits are created.

Description

[0001] technical field [0002] The invention relates to a process for producing low-aluminum-silicon killed carbon structural steel by continuous casting of thin slabs, and belongs to the technical field of iron and steel smelting processes. Background technique [0003] Since the 1980s, the thin slab continuous casting and rolling production line has developed rapidly with the advantages of less investment, quick results, low cost, and high yield. At present, the production capacity of thin slab continuous casting and rolling production lines in the world is nearly 80 million tons, and China accounts for about 40% of the production line. Fast pulling speed, high cooling strength and short solidification time. In order to adapt to the characteristics of the above continuous casting process and avoid the impact of subcutaneous air bubbles on the surface of the slab caused by poor deoxidation of molten steel on the quality of the coil, all thin slab continuous casting requir...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/04C22C33/04B22D11/04B22D11/111
Inventor 李梦英张洪波陈礼斌王峰杨晓江于勇王兰玉王新东张大勇胡庆利刘曙光杨杰张军国席晓利冯慧霄李京哲付建军耿伟
Owner HEBEI IRON AND STEEL
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