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High-strength castables for continuous casting machine tundish

A technology of tundish and castable, which is applied in the field of refractory materials, can solve problems such as difficulty in turning over the tundish, difficulty in adding water, long cycle, etc., and achieves improved corrosion resistance, good thermal shock stability, and improved spallation resistance. Effect

Inactive Publication Date: 2014-10-22
NINGXIA TIANZONG HONGGUANG COGENERATION TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The tundish smear uses inorganic binders, but its service life is short, the amount of water added is not easy to control, the construction and baking are complicated and the cycle is long, it is difficult to turn over the tundish, the labor intensity of the workers is high and the working conditions are harsh, and what is more serious is that if the baking If the degree is not enough, the water cannot be fully discharged, which will easily make the submerged nozzle damp and loose or even cause cracks, which will affect the quality of the slab

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] (1) Preparation of castable:

[0012] 4.0~2.0mm coarse aggregate 32, 2.0~1.0mm medium aggregate 33, 0.6~0.5mm fine aggregate 25, organic binder 0.1, alumina fine powder 10. According to the above ratio, the raw materials are weighed and combined to obtain a slurry with good fluidity. The physical properties are tested after forming, curing and heat treatment.

[0013] (2) Physical performance test:

[0014] After drying at 110℃×24h, the flexural strength is 15.4MPa, the compressive strength is 80.6MPa, and the linear change rate is ±0.5;

[0015] After 1100℃×3H treatment, the flexural strength is 26.6MPa, the compressive strength is 150.5MPa, and the linear change rate is ±0.5;

[0016] After 1500℃×3H treatment, the flexural strength is 35.4MPa, the compressive strength is 161.3MPa, and the linear change rate is ±0.5.

Embodiment 2

[0018] (1) Preparation of castable:

[0019] 4.0~2.0mm coarse aggregate 40, 2.0~1.0mm medium aggregate 30, 0.6~0.5mm fine aggregate 21, organic binder 0.2, alumina fine powder 9. According to the above ratio, the raw materials are weighed and combined to obtain a slurry with good fluidity. The physical properties are tested after forming, curing and heat treatment.

[0020] (2) Physical performance test:

[0021] After drying at 110℃×24h, the flexural strength is 15.4MPa, the compressive strength is 80.6MPa, and the linear change rate is ±0.5;

[0022] After 1100℃×3H treatment, the flexural strength is 25.6MPa, the compressive strength is 140.5MPa, and the linear change rate is ±0.5;

[0023] After 1500℃×3H treatment, the flexural strength is 34.4MPa, the compressive strength is 159.6MPa, and the linear change rate is ±0.5.

[0024] The advantage of the present invention is that zircon is added because it can improve spalling resistance and corrosion resistance, that is, at about 1500°...

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PUM

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Abstract

The invention discloses a high-strength pouring material for a pouring basket of a continuous caster. The high-strength pouring material comprises coarse aggregate, medium-fine aggregate, fine aggregate, a bonding agent, silica micropowder, aluminum oxide micropowder and water, and concretely comprises the following raw materials in parts by weight: 20-40 parts of coarse aggregate, 20-35 parts of medium-fine aggregate, 15-25 parts of fine aggregate, 0.02-0.3 part of an organic bonding agent and 7-10 parts of aluminum oxide micropowder, wherein the coarse aggregate is zircon, the medium-fine aggregate comprises dolomite and special grade alumina, and the fine aggregate is special grade alumina.

Description

Technical field [0001] The invention belongs to the technical field of refractory materials, and particularly relates to a high-strength castable for a continuous casting machine tundish. Background technique [0002] Compared with qualitative refractory products, unshaped refractory materials represented by refractory castables have the advantages of short process flow, low production energy consumption and cost, convenient use, wide application range, integrity and good use effect, and so on. The interior has been developed rapidly, and its proportion in the entire refractory material is getting higher and higher. In some countries with advanced refractory technology, the output of unshaped refractories has approached or even exceeded the output of shaped products. For example, the current output of monolithic refractories in Japan accounts for about 60% of the total refractories; in the United States, it is about 50%; in Britain, Germany, France and other countries, it is 40%...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/66
Inventor 穆祥王西来董伟胜刘文艳解仁刘朝晖苏新国王淑娟
Owner NINGXIA TIANZONG HONGGUANG COGENERATION TECH