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Dry ramming material for furnace body of medium-frequency induction furnace

A technology of dry ramming material and induction furnace, which is applied in the field of dry ramming material for medium frequency induction furnace body, can solve the problem of high production cost, achieve the effect of reducing production cost and broadening the market promotion prospect

Active Publication Date: 2015-12-16
攀枝花钢城集团瑞矿工业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, corundum and bauxite are generally used as dry-type ramming materials for the intermediate frequency furnace body for knotting, but the production cost of this method is too high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Prepared with raw materials in weight ratio: 20% of waste magnesia-chrome brick particles 0-1mm, 15% of 1-3mm and 47% of 3-8mm; 15% of magnesia binder; 3% of silicon micropowder; 0.5% of boric acid % (plus).

[0014] After the dry ramming material of this product is sintered in the intermediate frequency furnace, the furnace village forms a sintered layer, a semi-sintered layer and a loose layer with a certain thickness from the inside to the outside. The sintered layer is dense and hard, which can resist the penetration and erosion of molten metal. The service temperature can reach above 1800°C, and the furnace life can reach more than 100 times. The price is 40% lower than similar products.

[0015] Product performance: 110°C bulk density is greater than 2.6g / cm3, 110°C drying compressive strength is greater than 20Mpa, and at 850°C for 3 hours, the compressive strength is greater than 50Mpa; 110°C drying flexural strength is greater than 4Mpa, 850°C After 3 hours of...

Embodiment 2

[0017] Prepared with raw materials in weight ratio: 15% of waste magnesia-chrome brick particles 0-1mm, 10% of 1-3mm and 50% of 3-8mm; 23% of magnesia binder; 2% of silicon micropowder; 0.5% of boric acid % (plus).

[0018] After the dry ramming material of this product is sintered in the intermediate frequency furnace, the furnace village forms a sintered layer, a semi-sintered layer and a loose layer with a certain thickness from the inside to the outside. The sintered layer is dense and hard, which can resist the penetration and erosion of molten metal. The operating temperature can reach above 1800°C, and the furnace life can reach above 110 times. The price is 40% lower than similar products.

[0019] Product performance: 110°C bulk density greater than 2.7g / cm 3 The compressive strength is greater than 30Mpa when dried at 110°C, and the compressive strength is greater than 60Mpa after being held at 850°C for 3 hours; the flexural strength is greater than 5Mpa when dried...

Embodiment 3

[0021] Prepared with raw materials in weight ratio: 25% of waste magnesia-chrome brick particles 0-1mm, 10% of 1-3mm and 45% of 3-8mm; 16% of magnesia binder; 4% of silicon powder; 1% of boric acid % (plus).

[0022] After the dry ramming material of this product is sintered in the intermediate frequency furnace, the furnace village forms a sintered layer, a semi-sintered layer and a loose layer with a certain thickness from the inside to the outside. The sintered layer is dense and hard, which can resist the penetration and erosion of molten metal. The service temperature can reach above 1800°C, the furnace life can reach more than 80 times, and the price is 40% lower than similar products.

[0023] Product performance: 110°C bulk density greater than 2.5g / cm 3 The compressive strength is greater than 20Mpa when dried at 110°C, and the compressive strength is greater than 45Mpa after being kept at 850°C for 3 hours; the flexural strength is greater than 4Mpa when dried at 11...

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Abstract

The invention relates to the field of medium-frequency induction furnace refractory materials, in particular to a dry ramming material for a furnace body of a medium-frequency induction furnace. In order to solve the technical problems, the dry ramming material which can reduce production cost is provided. The dry ramming material is prepared from, by mass, 75-85% of waste magnesite-chrome brick particles, 10-25% of magnesium knotting material, 2-5% of silica powder and 0.5-1% of boric acid. Recycled waste magnesite-chrome bricks are innovatively used as the main raw material, and waste secondary resources are fully used. Manufacturing cost can be greatly reduced while products of the same quality are produced, and remarkable economic benefits are brought to enterprises; in addition, the dry ramming material conforms to the energy conservation and environment protection scientific development tendency, accordingly has quite wide market popularization prospects and is particularly suitable for the preparation process of the dry ramming material for the furnace of the medium-frequency induction furnace.

Description

technical field [0001] The invention relates to the field of intermediate frequency induction furnace refractory materials, in particular to a dry ramming material for an intermediate frequency induction furnace body. Background technique [0002] With the development of the economy, intermediate frequency induction furnace smelting has become more and more common, and it has become one of the main smelting equipment in the foundry industry, stainless steel smelting industry and special alloy smelting. The quality of the lining of the intermediate frequency induction furnace directly determines its service life and production efficiency. Compared with other smelting processes, intermediate frequency furnace smelting has the characteristics of short process and convenient production adjustment, but the structure of intermediate frequency furnace is complicated, and the induction coil is cooled by water, so the quality requirements of intermediate frequency furnace ramming mat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66
Inventor 黎光正陈涛汪波袁兵郑德明
Owner 攀枝花钢城集团瑞矿工业有限公司
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