Peritectic steel mold flux containing cobalt oxide and preparation method thereof

A technology of mold slag and cobalt oxide, which is applied in the field of iron and steel metallurgy, can solve problems such as the inability to effectively control the heat flux of mold slag, and achieve the effects of increasing radiation heat absorption capacity, reducing heat flux, and reducing heat flux

Inactive Publication Date: 2016-01-13
武汉钢铁有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] However, these methods cannot effectively control the heat flux of mold flux in the industrial production process.

Method used

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  • Peritectic steel mold flux containing cobalt oxide and preparation method thereof
  • Peritectic steel mold flux containing cobalt oxide and preparation method thereof
  • Peritectic steel mold flux containing cobalt oxide and preparation method thereof

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Embodiment Construction

[0030] In order to better explain the present invention, the main content of the present invention is further clarified below in conjunction with specific examples, but the content of the present invention is not limited to the following examples.

[0031] Formula for preparing mold flux:

[0032] Example Na 2 o MgO al 2 o 3 CaF 2 C co 2 o 3 CaO SiO 2 Alkalinity 1 5 12 2 20 3 10 28 20 0.9 2 12 3 8 3 12 0.1 32.9 29 1.8 3 10 10 3 15 9 5 28.8 19.2 1.2 4 8.5 5 6 10 6 4 35.5 25 1.3 5 8 2.5 3.5 7 5 1.5 44.5 28 1.6 6 6 5 3.5 10 8 2.5 32.5 32.5 1.4 7 8 2.53 3.7 7 4 1 48.29 25.48 1.0

[0033] The preparation method of mold flux is the prior art: spray granulation technology is used to produce mold flux, and natural mineral wollastonite, bauxite, dolomite, fluorite, or pre-melted slag are used as raw materials. When the alkalinity is not enough, use analytic...

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Abstract

The invention discloses peritectic steel covering slag containing cobaltous oxide. The peritectic steel covering slag containing the cobaltous oxide is characterized in that the chemical components of the covering slag raw materials are, by weight, 5 - 12 % of Na2O, 2.5 - 12 % of MgO, 2 - 8 % of Al2O3, 3 - 20 % of CaF2, 3 - 12 % of C, 0.1 - 10 % of Co2O3, and the balance CaO and SiO2, wherein the sum of the Na2O and the MgO is larger than 9 %. According to the peritectic steel covering slag, the required melting point of the peritectic steel covering slag is increased than the required melting point of an existing covering slag, and the thermal flux density of the pertectic steel covering slag is lower than the thermal flux density of the existing covering slag. Under the condition that the viscosity of the covering slag is identical to the viscosity of the existing covering slag, the thermal flux density of the peritectic steel covering slag is reduced to be below 0.686, and the thermal flux density of the peritectic steel covering slag is 0.809 lower than the thermal flux density of the existing covering slag.

Description

technical field [0001] The invention relates to the field of iron and steel metallurgy, in particular to peritectic steel mold slag containing cobalt oxide and a preparation method thereof. Background technique [0002] Peritectic steel refers to a series of steel grades with a carbon content of 8 to 18%. When casting this series of steel grades, the primary solidified shell of the meniscus of the crystallizer undergoes a δ-γ transformation as the temperature drops. Accompanied by a large volume shrinkage, the shell and the copper plate separate to form an air gap, resulting in the thinning of the billet shell due to thermal rheology. , forming depressions on the surface. The cooling and solidification speed of the concave part is slower than that of other parts, the structure is coarser, and the sensitivity to cracks is strong. Under the action of thermal stress and hydrostatic pressure, stress concentration occurs in the weak part of the depression and cracks appear. App...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D11/111
Inventor 陈俊孚万恩同彭著钢曹同友区铁齐江华张剑君杨成威庞建飞
Owner 武汉钢铁有限公司
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