Ramming mass for medium-frequency induction furnace and preparing method thereof

A technology of induction furnace and ramming material, which is applied in the field of ramming material for intermediate frequency induction furnace and its preparation, can solve the problems of reducing the high-temperature performance of ramming material, and achieve excellent high-temperature performance, environmental friendliness, and good corrosion resistance Effect

Active Publication Date: 2017-01-04
LENGSHUIJIANG HUAKE PERFORMANCE MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Another document (Hu Yaosheng et al. The effect of magnesia addition on the properties of corundum ramming material. Refractories. 2013, 47 (4), 271~273) introduced brown corundum and fused magnesia as the m

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A ramming material for an intermediate frequency induction furnace and a preparation method thereof. With 58~63wt% fused corundum, 15~18wt% tabular corundum, 14~16wt% fused magnesia, 5~9wt% α-Al 2 o 3 Micropowder, 1-1.5wt% of aluminum lactate and 1-2wt% of magnesium lactate are used as raw materials, mixed evenly, and packaged to obtain a ramming material for an intermediate frequency induction furnace.

[0027] After the ramming material for the medium frequency induction furnace prepared in this example is sintered, a three-layer structure of a sintered layer, a transition layer and a loose layer is formed. The sintered layer is dense and resistant to molten steel erosion, the operating temperature can reach above 1770°C, and the furnace life is 140~150 furnace times, which is 10~15% longer than similar products.

[0028] The ramming material for intermediate frequency induction furnace prepared in this example is tested: the bulk density after drying at 110°C×24h i...

Embodiment 2

[0030] A ramming material for an intermediate frequency induction furnace and a preparation method thereof. With 62~66wt% fused corundum, 12~15wt% tabular corundum, 12~14wt% fused magnesia, 4~6wt% α-Al 2 o 3 Micropowder, 1.5-2wt% aluminum lactate and 2-3wt% magnesium lactate are used as raw materials, mixed evenly, and packaged to obtain a ramming material for an intermediate frequency induction furnace.

[0031] After the ramming material for the medium frequency induction furnace prepared in this example is sintered, a three-layer structure of a sintered layer, a transition layer and a loose layer is formed. The sintered layer is dense and resistant to molten steel erosion, the operating temperature can reach above 1780°C, and the furnace life is 130~140 furnace times, which is 12~16% longer than similar products.

[0032] The ramming material for intermediate frequency induction furnace prepared in this example is tested: the bulk density after drying at 110°C×24h is 2.92...

Embodiment 3

[0034] A ramming material for an intermediate frequency induction furnace and a preparation method thereof. With 66~70wt% fused corundum, 9~12wt% tabular corundum, 10~12wt% fused magnesia, 2~5wt% α-Al 2 o 3 Micropowder, 2-2.5wt% of aluminum lactate and 3-5wt% of magnesium lactate are used as raw materials, mixed evenly, and packaged to obtain a ramming material for an intermediate frequency induction furnace.

[0035] After the ramming material for the medium frequency induction furnace prepared in this example is sintered, a three-layer structure of a sintered layer, a transition layer and a loose layer is formed. The sintered layer is dense and resistant to molten steel erosion, the operating temperature can reach above 1790°C, and the furnace life is 125~135 furnace times, which is 15~20% longer than similar products.

[0036] The ramming material for intermediate frequency induction furnace prepared in this example is tested: the bulk density after drying at 110°C×24h is...

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Abstract

The invention relates to ramming mass for a medium-frequency induction furnace and a preparing method thereof. According to the technical scheme, 58-74 wt% of fused corundum, 6-18 wt% of tabular corundum, 8-16 wt% of fused magnesite, 2-9 wt% of alpha-Al2O3 micro powder, 1-3 wt% of aluminum lactate and 1-6 wt% of magnesium lactate are used as raw materials and mixed uniformly to obtain the ramming mass for the medium-frequency induction furnace, wherein the particle size of aluminum lactate and magnesium lactate is smaller than 0.18 mm, the particle size of fused corundum is 0.088-5 mm, and the content of Al2O3 of the fused corundum is 94-99.5 wt%; the particle size of tabular corundum is 0.044-1 mm, the particle size of the fused magnesite is 0.044-1 mm, and the content of MgO of fused magnesite is larger than or equal to 95 wt%; the raw materials are mixed in a mixer for 10-25 min. The preparing method has the advantages of being simple in process and environmentally friendly. The prepared ramming mass for the medium-frequency induction furnace is high in refractoriness, erosion resistance and scouring resistance and long in service life.

Description

technical field [0001] The invention belongs to the technical field of refractory materials for intermediate frequency induction furnaces. In particular, it relates to a ramming material for an intermediate frequency induction furnace and a preparation method thereof. Background technique [0002] The use of intermediate frequency induction furnace is becoming more and more popular, and it has become one of the main production equipment for stainless steel smelting, casting and special alloy smelting. The performance of the lining material directly determines the efficiency of the induction furnace. [0003] The ramming material requires a sintering reaction under medium and high temperature conditions to form a hard sintered dense layer. At present, sintering agents are generally introduced into ramming materials. The sintering agents promote the sintering of ramming materials and at the same time form a liquid phase, which reduces the erosion resistance of the ramming ma...

Claims

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Application Information

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IPC IPC(8): C04B35/66C04B35/101
CPCC04B35/101C04B2235/3206C04B2235/48C04B2235/77C04B2235/96C04B2235/9607
Inventor 袁聪李远兵余东寿袁添翼周伟强
Owner LENGSHUIJIANG HUAKE PERFORMANCE MATERIALS
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