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Continuous casting tundish magnesia-calcium dry vibrating material and preparation method thereof

A dry vibrating material, coated with magnesium and calcium, is used in the field of refractory materials to reduce pollution, improve slag resistance, and improve erosion resistance.

Inactive Publication Date: 2021-09-21
海城利尔麦格西塔材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because its CaO is easily hydrated, many waste magnesia-calcium-carbon bricks with unqualified physical factors such as cracks and swelling due to hydration appear in the production process, and these magnesia-calcium-carbon bricks cannot be used and can only be processed as waste products.

Method used

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  • Continuous casting tundish magnesia-calcium dry vibrating material and preparation method thereof
  • Continuous casting tundish magnesia-calcium dry vibrating material and preparation method thereof
  • Continuous casting tundish magnesia-calcium dry vibrating material and preparation method thereof

Examples

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preparation example Construction

[0034] A method for preparing a continuous casting tundish magnesium-calcium dry vibration material, specifically comprising:

[0035] 1) Crushing the waste magnesia-calcium-carbon bricks in a crusher, sieving them into raw materials of 0<grain size≤1mm, 1mm<grain size≤3mm, 3mm<grain size≤5mm;

[0036] 2) The crushed magnesia-calcium-carbon waste brick particles are dried in a rotary kiln for 3-5 minutes after iron removal, and the drying temperature is 400°C-450°C.

[0037] 3) crush 91 magnesia in a crusher, and sieve it into raw materials of 1mm<grain size≤3mm, 3mm<grain size≤5mm;

[0038] 4) Crushing the 95 mid-grade magnesia in a crusher, and sieving it into raw materials with a particle size of 0<1mm and below 200 mesh;

[0039] 5) weighing the raw materials according to the proportioning ratio for subsequent use;

[0040] 6) Mixing

[0041] First add 5-3mm, 3-1mm, 1-0mm raw materials and dry mix for 3-5 minutes, then add binder and red clay, and mix for another 3-5 mi...

Embodiment 1

[0049] The scanning electron microscope figure of embodiment 1 is shown in figure 2 , the energy spectrum of the scanning electron microscope is shown in image 3 .

Embodiment 4

[0050] The scanning electron microscope figure of embodiment 4 is shown in Figure 4 , the energy spectrum of the scanning electron microscope is shown in Figure 5 .

[0051] It can be seen from the electron microscope scanning images of the above two examples that the microstructure of Example 1 has very uniform particles, and its main elements are Mg, Al, Si, Ca, Fe, O. The microstructure of Example 4 after adding magnesium-calcium carbon shows that the particles are relatively uniform, and no new substances are formed. The proportion of Ca increases due to the addition of magnesium-calcium carbon, and the rest does not change much.

[0052] It can be seen from the data that Example 4 is better than Example 1 in bulk density and flexural tests at 1500°C, and in the slag resistance test, because Example 4 contains CaO, it can purify molten steel and enhance its resistance to slag. Slag capacity, so comprehensive consideration embodiment 4 is better than embodiment 1.

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Abstract

The invention relates to a continuous casting tundish magnesia-calcium dry vibrating material. The material comprises the following components in parts by weight: 10-15% of magnesia-calcium-carbon waste bricks with the granularity of more than 3 and less than or equal to 5mm, 10-15% of magnesia-calcium-carbon waste bricks with the granularity of more than 1 and less than or equal to 3mm, 15-20% of magnesia-calcium-carbon waste bricks with the granularity of more than 0 and less than or equal to 1mm, 0-5% of 91 magnesia with the granularity of more than 3 and less than or equal to 5mm, 10-20% of 91 magnesia with the granularity of more than 1 and less than or equal to 3mm, 10-25% of 95 medium-grade magnesia with the granularity of more than 0 and less than or equal to 1mm, 25%-28% of 200-mesh 95 medium-grade magnesia, 2%-4% of a binding agent and 1%-2% of red clay. The dry vibration material is produced by using the waste magnesia-calcium-carbon bricks instead of magnesia as a raw material, and the use effect of the dry vibration material is basically the same as that of a dry vibration material prepared by using magnesia as a main raw material. The dry vibration material contains CaO, so that a molten steel purification effect is achieved, the slag resistance of the dry vibration material is improved, and the anti-scouring capacity of the dry vibration material is improved. The cost is effectively reduced, and the environmental pollution is reduced.

Description

technical field [0001] The invention relates to a refractory material, in particular to a continuous casting tundish magnesium-calcium dry vibrating material. Background technique [0002] In recent years, due to the rapid development of magnesium-calcium refractory materials, the varieties of magnesium-calcium refractory materials have been continuously enriched. Among them, magnesia-calcium-carbon bricks are widely used in the smelting of high-purity steel because they contain CaO and can purify molten steel. However, because its CaO is easily hydrated, many waste magnesia-calcium-carbon bricks with unqualified physical factors such as cracks and swelling due to hydration appear in the production process, and these magnesia-calcium-carbon bricks cannot be used and can only be processed as waste products. . These magnesia-calcium-carbon waste bricks can not only produce high-quality shaped refractory materials, but also produce some unshaped refractory materials. If it c...

Claims

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Application Information

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IPC IPC(8): C04B35/043
CPCC04B35/043C04B2235/349C04B2235/48C04B2235/5427C04B2235/5436C04B2235/602C04B2235/77C04B2235/96C04B2235/9676
Inventor 崔博傲张义先宫华泽金钊
Owner 海城利尔麦格西塔材料有限公司