Low-carbon silicon iron product and smelting method thereof

A carbon silicon and product technology, which is applied in the field of low carbon ferrosilicon products and its smelting, can solve the problems of high carbon content and reduce the content of trace elements in products, and achieve the effect of reducing the content of trace elements

Inactive Publication Date: 2018-10-30
QINGHAI BAITONG HIGH PURITY MATERIALS DEVCO LTD
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Problems solved by technology

[0005] The purpose of the present invention is to provide a low-carbon ferrosilicon product and its smelting method, which adopts selected furnace materials for smelting production, achieves the purpose of reducing the content of trace elements in the product, and solves the defect of high carbon content in existing ferrosilicon. It can stably produce low-carbon ferrosilicon products with C≤0.009wt% to meet the needs of production

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Embodiment Construction

[0026] In order to fully understand the technical content of the present invention, the technical solutions of the present invention will be further introduced and illustrated below in conjunction with specific examples, but not limited thereto.

[0027] The invention provides a low-carbon ferrosilicon product, the chemical composition wt% of which is: Si≥75%, Al≤0.08%, Ca≤0.05%, C≤0.009%, Mn≤0.12%, P≤0.04%, S≤ 0.01%, Ti≤0.03%, and the balance is Fe and impurities.

[0028] The smelting method of low-carbon ferrosilicon product of the present invention is:

[0029] Raw materials: The raw materials for smelting low-carbon ferrosilicon products include silica, carbonaceous reducing agent, and iron materials;

[0030] Among them, the chemical composition wt% in silica is: SiO 2 >99.5%, Al 2 o 3 2 o 5 ≤0.008%, TiO 2 ≤0.003%, the particle size of silica is 80-150mm;

[0031] In the carbonaceous reducing agent, fixed carbon ≥ 85wt%, ash ≤ 6wt%, volatile matter 8wt% ~ 13wt%, T...

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Abstract

The invention provides a low-carbon silicon iron product. Chemical components of the low-carbon silicon iron product include, by weight percent, 75% or larger of Si, 0.08% or less of Al, 0.05% or lessof Ca, 0.009% or less of C, 0.12% or less of Mn, 0.04% or less of P, 0.01% or less of S, 0.03% or less of Ti and the balance Fe and impurities. According to the low-carbon silicon iron product and asmelting method thereof, refined silica, a carbonaceous reducing agent and a ferrous material are adopted to smelting production, careful treatment is carried out on the refined materials to achieve the purpose of reducing the content of microelements in the product, the problem that the carbon content in existing silicon iron is relatively high is solved, and the low-carbon silicon iron product with 0.009 wt% or less of C can be stably produced to meet the production requirement.

Description

technical field [0001] The invention relates to the technical field of ferrosilicon smelting, in particular to a low-carbon ferrosilicon product and a smelting method thereof. Background technique [0002] With the technological progress and product structure adjustment of the iron and steel industry in recent years, the requirements for trace elements in ferrosilicon (such as Ti, P, C, Al, Ca, etc.) have become more and more stringent. The content of trace elements in ferrosilicon Determines the quality of ferrosilicon. [0003] In the existing production of ferrosilicon including ultra-low carbon high-purity ferrosilicon, the carbides in ferrosilicon mainly exist in the form of SiC, and it is inevitable that some carbides enter the furnace molten pool and alloy during smelting, so The excessive carbon content in ferrosilicon will affect the quality of ferrosilicon. [0004] Therefore, it is necessary to carry out research and development to provide a technical solution t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C33/04C22C35/00
Inventor 李海英胡海东赵海勇杨小平兰成元卢光发
Owner QINGHAI BAITONG HIGH PURITY MATERIALS DEVCO LTD
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