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Raw material formula of tundish insulating board and preparation method for tundish insulating board

A technology of thermal insulation board and tundish, applied in the field of refractory materials, can solve the problems of high cost of thermal insulation board of tundish, high production cost, carbonization of molten steel, etc., and achieve the effect of reducing operators, long service life and simplifying production process

Inactive Publication Date: 2011-09-14
陈红良
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The cost of resin-bonded tundish insulation panels is high, and as the quality of steel is getting higher and higher, the use of resin-bonded tundish insulation panels will cause carbonation of molten steel, which is not conducive to smelting clean steel and ultra-low carbon steel, and The molding process of the suction filter pressurization method is complex and the production cost is high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Embodiment 1, the raw material formula of the tundish heat insulation board, its raw material is composed of olive sand, magnesia, waste magnesia bricks, magnesium chloride, and hardener. The ratio of the raw materials (mass percentage) is 40% of olive sand, 21.5% of magnesia, 30% of waste magnesia bricks, 8% of magnesium chloride and 0.5% of hardener. The particle size of the raw materials is required to be no more than 3 mm for olive sand, such as 0.1 to 3 mm, no more than 3 mm for waste magnesia bricks, such as 0.1 to 3 mm, and 180 mesh for magnesia.

[0018] The preparation method of making the tundish heat insulation board by adopting the raw material formula of the above-mentioned tundish heat insulation board comprises the following steps:

[0019] 1) Configure raw materials and mix and stir;

[0020] 2) Add the stirred raw materials into water with 5.5% of the total mass of the raw materials, mix and stir for 3 minutes, and then put them into a mold for vibrati...

Embodiment 2

[0023] Embodiment 2, the raw material formula of the tundish heat insulation board, its raw material is composed of olive sand, magnesia, waste magnesia bricks, magnesium chloride, and hardener. The ratio of the raw materials (mass percentage) is 30% of olive sand, 25% of magnesia, 38.5% of waste magnesia bricks, 6% of magnesium chloride and 0.5% of hardener. The particle size of the raw materials is required to be no more than 3 mm for olive sand, such as 0.1-3 mm, no more than 3 mm for waste magnesia bricks, such as 0.1-3 mm, and 180 mesh for magnesia.

[0024] The preparation method of making the tundish heat insulation board by adopting the raw material formula of the above-mentioned tundish heat insulation board comprises the following steps:

[0025] 1) Configure raw materials and mix and stir;

[0026] 2) Add the stirred raw materials into water with 6.5% of the total mass of the raw materials, mix and stir for 5 minutes, and then put them into a mold for vibration mol...

Embodiment 3

[0029] Embodiment 3, raw material formula and preparation method of tundish heat insulation board, its raw material is composed of olive sand, magnesia, waste magnesia brick, magnesium chloride, hardener. The ratio of the raw materials (mass percentage) is 50% of olive sand, 15% of magnesia, 27.8% of waste magnesia bricks, 7% of magnesium chloride and 0.2% of hardener. The particle size of the raw materials is required to be no more than 3 mm for olive sand, such as 0.1-3 mm, no more than 3 mm for waste magnesia bricks, such as 0.1-3 mm, and 180 mesh for magnesia.

[0030] The preparation method of making the tundish heat insulation board by adopting the raw material formula of the above-mentioned tundish heat insulation board comprises the following steps:

[0031] 1) Configure raw materials and mix and stir;

[0032] 2) Add the stirred raw materials into water with a total mass of 7.5% of the raw materials, mix and stir for 4 minutes, and then put them into a mold for vibra...

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Abstract

The invention discloses a raw material formula of a tundish insulating board. The raw materials (mass percentage) consist of 30 to 50 percent of olivine sand, 15 to 25 percent of magnesia, 25 to 40 percent of waste magnesite brick, 4 to 8 percent of magnesium chloride and 0.2 to 0.5 percent of hardening agent. The preparation method for the tundish insulating board by adopting the raw material formula of the tundish insulating board comprises the following steps: 1) configuring the raw materials, and mixing and stirring the raw materials; 2) adding water accounting for 5.5 to 7.5 percent of the total mass of the raw materials into the stirred raw materials, mixing and stirring the mixture for 3 to 5min, and then putting the mixture into a mould for vibratory compaction; 3) demoulding after 1 to 2 hours of the forming; and 4) baking the demoulded tundish insulating board at a temperature of between 120 and 150 DEG C for 6 to 8 hours in a drying room. The preparation method adopts the magnesium chloride as a bonding agent, has no smoke and penetrating odor in the baking and using processes, is suitable for smelting clean steel and extreme low carbon steel, simplifies production process and reduces operators and investment of production cost and equipment due to adoption of the mould for casting.

Description

technical field [0001] The invention relates to refractory material technology, in particular to a raw material formula of a tundish heat insulation board and a preparation method thereof. Background technique [0002] At present, most of the binders used in the tundish insulation boards used in domestic continuous casting are resins, and are formed by the suction filtration pressure method. For example, in the preparation of the tundish insulation board in the Chinese invention patent CN91102229.5, the above-mentioned method has been adopted. The cost of resin-bonded tundish insulation panels is high, and as the quality of steel is getting higher and higher, the use of resin-bonded tundish insulation panels will cause carbonation of molten steel, which is not conducive to smelting clean steel and ultra-low carbon steel, and The molding process of the suction filtration pressurization method is complicated, and the production cost is relatively high. Contents of the inven...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/66B22D41/00B28B1/08B28B11/24B28C1/16
Inventor 陈红良陈雪飞蒋志忠江红芬
Owner 陈红良
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