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Corundum dry type ramming material for medium-frequency induction furnace and preparation method of corundum dry type ramming material

A technology of dry ramming material and induction furnace, which is applied in the field of refractory materials for medium frequency induction furnace, can solve the problems of low erosion resistance and erosion resistance, damage of dry ramming material, poor thermal shock resistance, etc., and achieve Excellent anti-scouring performance, excellent anti-scouring performance, and high refractoriness

Inactive Publication Date: 2019-02-12
湖南立达高新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the sintering strength of the working layer of the existing corundum-magnesium ramming material is low during use, resulting in low erosion resistance and erosion resistance; while the sintered layer of the working surface is thicker, and the scattered structure of the non-working surface is thinner , is not conducive to the absorption of thermal stress, resulting in poor thermal shock resistance and easy peeling, resulting in rapid damage to dry ramming materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A corundum dry ramming material for intermediate frequency induction furnace and a preparation method thereof. The preparation method described in this embodiment is:

[0027] Using 48-58wt% fused corundum particles, 30-40wt% tabular corundum and 6-12wt% fused magnesia as raw materials, plus 0.5-1.0wt% yttrium oxide powder and 0.5-1.0wt of the raw materials % Of titanium dioxide fine powder, 0.5~1.0wt% of ZrOCl 2 ·8H 2 O fine powder and 0.5-1.0wt% nickel oxide fine powder are mixed uniformly to obtain corundum dry ramming material for intermediate frequency induction furnace.

[0028] The physical and chemical properties of the corundum dry ramming material for intermediate frequency induction furnace prepared in Example 1 are: 1100℃×3h, and the bulk density is 2.88~2.92g / cm 3 , Flexural strength is 7.5~8.5MPa, linear change rate is 0.7~0.9%; 1600℃×3h bulk density is 2.64~2.68g / cm 3 , The flexural strength is 6.5-7.5MPa, the linear rate of change is 2.6-3.0%; the refractorin...

Embodiment 2

[0030] A corundum dry ramming material for intermediate frequency induction furnace and a preparation method thereof. The preparation method described in this embodiment is:

[0031] Using 55~65wt% fused corundum particles, 23~33wt% tabular corundum and 9~14wt% fused magnesia as raw materials, plus 1.0~1.5wt% yttrium oxide powder of the raw materials, 0.5~1.0wt % Of titanium dioxide fine powder, 1.0~1.5wt% of ZrOCl 2 ·8H 2 O fine powder and 0.5-1.0wt% nickel oxide fine powder are mixed uniformly to obtain corundum dry ramming material for intermediate frequency induction furnace.

[0032] The physical and chemical properties of the corundum dry ramming material for intermediate frequency induction furnace prepared in Example 2 are: 1100℃×3h, the bulk density is 2.90~2.94g / cm 3 , The flexural strength is 8.0~9.0MPa, the linear rate of change is 0.8~1.0%; the volume density is 2.66~2.70g / cm at 1600℃×3h 3 The flexural strength is 7.0~8.0MPa, the linear rate of change is 2.7~3.1%; the ...

Embodiment 3

[0034] A corundum dry ramming material for intermediate frequency induction furnace and a preparation method thereof. The preparation method described in this embodiment is:

[0035] 58-68wt% fused corundum particles, 20-30wt% tabular corundum and 12-16wt% fused magnesia as raw materials, plus 0.8-1.3wt% yttrium oxide powder and 0.5-1.0wt % Of titanium dioxide fine powder, 1.5~2.0wt% of ZrOCl 2 ·8H 2 O fine powder and 0.5-1.0wt% nickel oxide fine powder are mixed uniformly to obtain corundum dry ramming material for intermediate frequency induction furnace.

[0036] The physical and chemical properties of the corundum dry ramming material for intermediate frequency induction furnace prepared in Example 3 are: 1100℃×3h, and the bulk density is 2.92~2.96g / cm 3 , Flexural strength is 7.8~8.8MPa, linear change rate is 0.9~1.1%; 1600℃×3h bulk density is 2.68~2.72g / cm 3 , The flexural strength is 7.5~8.5MPa, the linear change rate is 2.8~3.2%; the refractoriness is 1780~1790℃, and the fu...

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Abstract

The invention particularly relates to a corundum dry type ramming material for a medium-frequency induction furnace and a preparation method of the corundum dry type ramming material. According to thetechnical scheme, 48-68wt% of fused alumina particles, 20-40wt% of tabular corundum and 6-16wt% of fused magnesia are used as raw materials, 0.5-1.5wt% of the raw materials of yttrium oxide micro powder, 0.5-1.0wt% of titanium dioxide fine powder, 0.5-2.0wt% of ZrOCl<2>.8H<2>O fine powder and 0.5-1.0wt% of nickel oxide fine powder are additionally added, uniform mixing is performed, and the corundum dry type ramming material for the medium-frequency induction furnace is obtained. The prepared corundum dry type ramming material for the medium-frequency induction furnace has the characteristicsof high refractoriness, good volume stability, high high-temperature strength, good anti-strip performance, excellent anti-scour performance and good anti-erosion performance.

Description

Technical field [0001] The invention belongs to the field of refractories for intermediate frequency induction furnaces. Specifically, it relates to a corundum dry ramming material for intermediate frequency induction furnace and a preparation method thereof. Background technique [0002] With the development of economy, intermediate frequency induction furnace smelting has become one of the main smelting equipment in foundry, stainless steel smelting and special steel smelting industries. The dry ramming material used in the lining of the intermediate frequency induction furnace is an important material that affects the normal production of the intermediate frequency induction furnace. During use, the working surface of the dry ramming material needs to be sintered to form a high-strength sintered layer, which can effectively resist the erosion and erosion of molten steel; the non-working surface should maintain an unsintered bulk structure, and the structure should be relative...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/101
CPCC04B35/101C04B2235/3206C04B2235/3225C04B2235/3232C04B2235/3279C04B2235/444C04B2235/77C04B2235/96C04B2235/9607
Inventor 张志韧李亚伟徐义彪桑绍柏王庆虎朱天彬
Owner 湖南立达高新材料有限公司
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