Magnesium oxide precast refractory material and construction method thereof

A technology of refractory materials and construction methods, applied in the field of refractory materials and their construction, can solve the problems of not meeting the life requirements of continuous casting ladles, long baking time of ladles, easy slag and peeling resistance, etc., so as to avoid advanced damage and improve Resistance to steel slag erosion and good fluidity

Inactive Publication Date: 2009-03-11
ANHUI HEPURE CERAMIC
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

This kind of inner lining has good integrity and significantly improves the service life, but it has a long baking time for the ladle and serious slag drop phenomenon. It is difficult to unpack for most small and medium-sized steel mills without special equipment.
In order to make up for this deficiency, aluminum-magnesium non-burning bricks have been developed. The lining bricks are easy to build, short baking time and easy to unpack, but there are still problems of easy slag remo

Method used

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  • Magnesium oxide precast refractory material and construction method thereof

Examples

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Example Embodiment

[0028] To further describe the present invention, a magnesia-based prefabricated refractory material and its construction method of the present invention will be further described below in conjunction with examples.

[0029] The embodiment formula of a prefabricated magnesia-based refractory material of the present invention is shown in the following table:

[0030] Table 1 Example formula of a kind of magnesia-based prefabricated refractory material (wt%)

[0031] Component Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 Magnesia particles 66.85 59 66 72 66 67.6 Magnesia powder 30 30.30 27.55 18 31 28 Silicon powder 2 6 4 5.7 2.11 0.5 Aluminum powder 1 4 2 3.95 0.5 3.5 Hexametaphosphate 0.05 0.3 0.2 0.25 0.05 0.15 sodium tripolyphosphate 0.05 0.3 0.2 0.05 0.3 0.2 Organic fiber 0.05 0.1 0.05 0.05 0.04 0.05

[0032] After the magnesia-based prefabricated refractory mate...

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Abstract

The invention discloses a precast magnesia refractory material, which is prepared by mixing and stirring the following component materials (100 percent by weight) uniformly: 59 to 72 percent of magnesia particles, 18 to 31 percent of magnesia powder, 0.5 to 6 percent of silica micropowder, 0.5 to 4 percent of aluminium micropowder, 0.05 to 0.3 percent of SHMP, 0.05 to 0.3 percent of STPP and 0.04 to 0.1 percent of organic fiber. The invention also discloses a construction method for the precast magnesia refractory material, which comprises the following steps of batching, stirring, vibrating, tapping, demoulding after final setting, and drying. The precast magnesia refractory material is high in magnesium and low in aluminum, and strong in slag resistance, has less pollution to liquid steel, and reaches or surpasses high aluminum-magnesia castable in bonding strength and thermal shock resistance.

Description

technical field [0001] The invention relates to a refractory material and a construction method thereof, in particular to a magnesia prefabricated refractory material used in a ladle of a steelmaking process and a construction method thereof. Background technique [0002] The ladle is an indispensable and important equipment in the steelmaking industry. As the refractory material for the inner lining of the ladle, several major changes have taken place. [0003] In the early years when the continuous casting ratio was very low, the lining of the ladle was built with wax stone bricks, clay bricks, high alumina bricks, etc., and some shot materials and ramming materials were also used. This kind of refractory material shows poor spalling resistance and erosion resistance during use, and its service life is low, only 10 times on average, and it can only reach about 20 times after treatment. Since then, magnesia-dolomite fired bricks have appeared. Because it is prone to therma...

Claims

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Application Information

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IPC IPC(8): C04B35/66
Inventor 丁岩峰叶伟王翔
Owner ANHUI HEPURE CERAMIC
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