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Magnesium-zirconium ring of slide plate for calcium-treated steel and preparation method thereof

A technology of calcium treatment and magnesium-zirconium rings, applied in the field of magnesium-zirconium rings, can solve the problems of unfavorable large-scale industrial production and high cost of calcium-treated steel slides, and achieve the effect of low cost and stable performance

Inactive Publication Date: 2014-02-26
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the application of zirconium rings will inevitably make the cost of calcium-treated steel slides higher than that of ordinary material slides, which is not conducive to large-scale industrial production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A magnesium-zirconium ring for a calcium-treated steel slide plate and a preparation method thereof. First, 60~64wt% of granular material, 26~29wt% of fused magnesia fine powder and 8~11wt% of monoclinic zirconia fine powder are used as a mixture, and then 2.5~3.5wt% of the mixture is added. Vinyl alcohol, stirred evenly, molded, dried; then kept at 1600-1700°C for 2-5 hours, cooled and machined to obtain magnesium-zirconium rings for calcium-treated steel slides.

[0018] The preparation method of the granular material is: using 74-80wt% fused magnesia fine powder and 20-26wt% monoclinic zirconia fine powder as raw materials, plus 2.0-3.0wt% polyvinyl alcohol as the raw material, Mix evenly, press to form, dry, keep warm at 1550-1650°C for 2-4 hours, cool with the furnace, and get pellets after crushing.

[0019] The bulk density of the magnesium-zirconium rings used in calcium-treated steel slides prepared in Example 1 is 3.05~3.15g / cm 3 , the apparent porosity is 1...

Embodiment 2

[0021] A magnesium-zirconium ring for a calcium-treated steel slide plate and a preparation method thereof. First, 64~68wt% of granular material, 23~26wt% of sintered magnesia fine powder and 8~11wt% of desiliconized zirconia fine powder are used as the mixture, and then 3.5~4.5wt% of the mixture is added. Alcohol, stirred evenly, shaped, dried; then kept at 1700-1800°C for 5-8 hours, cooled and machined to obtain magnesium-zirconium rings for calcium-treated steel slides.

[0022] The preparation method of the granular material is as follows: 80-86wt% sintered magnesia fine powder and 14-20wt% desiliconized zirconia fine powder are used as raw materials, and 3.0-4.0wt% polyvinyl alcohol is added as the raw material, and mixed Uniform, pressed into shape, dried, kept at 1650~1750°C for 4~6h, cooled with furnace, and pellets can be obtained after crushing.

[0023] The bulk density of the magnesium-zirconium rings used in calcium-treated steel slides prepared in Example 2 is 3...

Embodiment 3

[0025] A magnesium-zirconium ring for a calcium-treated steel slide plate and a preparation method thereof. First, 68~72wt% of granular material, 20~23wt% of magnesia fine powder and 8~11wt% of monoclinic zirconia fine powder are used as a mixture, and then 4.5~5.5wt% of polyvinyl alcohol is added to the mixture , Stir evenly, form and dry; then keep warm at 1750~1850℃ for 4~7h, after cooling, carry out mechanical processing, that is, magnesium-zirconium rings for calcium-treated steel slides.

[0026] The preparation method of the granular material is as follows: 86~92wt% magnesia fine powder and 8~14wt% desiliconized zirconia fine powder are used as raw materials, and 4.0~5.0wt% polyvinyl alcohol is added as the raw material, and mixed evenly , pressed into shape, dried, kept at 1700-1800°C for 3-5 hours, cooled with the furnace, and pellets were obtained after crushing.

[0027] The magnesia fine powder described in this embodiment is a mixed fine powder of fused magnesia ...

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Abstract

The invention particularly relates to a magnesium-zirconium ring of a slide plate for calcium-treated steel and a preparation method thereof. The technical scheme is as follows: the preparation method comprises the following steps: preparing a mixture containing 60-72 wt% of granular material, 20-29 wt% of magnesia fine powder and 8-14 wt% of zirconium oxide fine powder, adding polyvinyl alcohol which accounts for 2.5-5.5 wt% of the mixture, uniformly stirring, forming, and drying; and keeping the temperature at 1600-1850 DEG C for 2-8 hours, cooling, and machining to obtain the magnesium-zirconium ring of a slide plate for calcium-treated steel. The preparation method of the granular material comprises the following steps: preparing 74-92 wt% of magnesia fine powder and 8-26 wt% of zirconium oxide fine powder as raw materials, adding polyvinyl alcohol which accounts for 2.0-5.0 wt% of the raw materials, evenly mixing, carrying out pressure forming, drying, keeping the temperature of 1550-1800 DEG C for 2-6 hours, carrying out furnace cooling, and crushing to obtain the granular material. The magnesium-zirconium ring has the characteristics of stable service performance and low cost, and is suitable for industrial production.

Description

technical field [0001] The invention belongs to the technical field of magnesium-zirconium rings, and in particular relates to a magnesium-zirconium ring used for calcium-treated steel slide plates and a preparation method thereof. Background technique [0002] Due to the long-term chemical erosion and physical erosion of molten steel, as well as intense thermal shock and mechanical wear, the sliding plate is extremely harsh in use, so the sliding plate is usually made of aluminum carbon or aluminum carbon zirconium. Calcium can deoxidize, desulfurize and denature inclusions in molten steel, thereby improving the fluidity of molten steel and improving the intrinsic quality of steel. Therefore, calcium treatment of molten steel has been widely used as a process for refining molten steel. However, [Ca] in calcium-treated molten steel will interact with Al in the slide plate 2 o 3 and SiO 2 The reaction produces CaO, and the product CaO also continues to interact with the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/66C04B35/622
Inventor 李亚伟徐义彪桑绍柏李远兵赵雷李淑静
Owner WUHAN UNIV OF SCI & TECH