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Refractory castable for tundish cover

A refractory castable and tundish technology, applied in the field of refractory materials, can solve the problems of increasing product cost, troublesome product storage, transportation and use, and restricting the depth and breadth of application

Active Publication Date: 2014-02-05
NINGXIA TIANZONG HONGGUANG COGENERATION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As we all know, calcium-magnesia refractory materials have gradually been widely used in the steelmaking industry because of their environmental protection and ability to clean molten steel. However, the problem of easy hydration of calcium oxide has not been well resolved, which restricts its Depth and breadth of application
[0005] Calcium-containing refractory materials commonly used at present-the calcium-magnesia sand without surface waterproof treatment can be stored naturally without hydration for more than 100 days; Calcium-magnesia bricks prepared from treated calcium-magnesia sand not only need to use anhydrous or liquid binder with as little water content as possible, but also the produced calcium-magnesia bricks must be treated with oil or wax before being stored in vacuum packaging. No hydration for 180 days; it not only increases the cost of the product, but also brings a lot of trouble to the storage, transportation and use of the product

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] (1) The parts by weight of the raw materials used to prepare the refractory castable for the tundish cover are: 50 parts of magnesia, 20 parts of dolomite, 10 parts of zircon, 15 parts of carbon, 4 parts of anhydrous binder, urethane 1 part of tropin; magnesia, dolomite, zircon are mixed to make granules and fine powders, wherein the parts by weight of granules and fine powders are: 35 parts of granules, 65 parts of fine powders, and the particle size range is 3.0, The particle size of the fine powder is 1.0 mm.

[0014] (2) Premix magnesia, dolomite, and zircon to obtain a mixture, grind the mixture according to the weight of the above particles and fine powder, then add carbon for mixing, and finally add anhydrous binder, Urotropine mixed vested refractory castable for tundish cover.

[0015] Its physical performance index is: 200 ℃ × 12h after baking, the compressive strength is 10MPa, and the bulk density is 2.19g / cm 3 ;After 1550℃×3h high temperature reburning, t...

Embodiment 2

[0017] (1) The parts by weight of the raw materials used to prepare the refractory castable for the tundish cover are: 80 parts of magnesia, 5 parts of dolomite, 5 parts of zircon, 7.8 parts of carbon, 2 parts of anhydrous binder, urethane 0.2 parts of tropin; magnesia, dolomite, and zircon are mixed to make granules and fine powders, wherein the weight parts of granules and fine powders are: 55 parts of granules, 45 parts of fine powders, and the particle size range is 2.0mm , The fine powder particle size is 0.5mm.

[0018] (2) Premix magnesia, dolomite, and zircon to obtain a mixture, grind the mixture according to the weight of the above particles and fine powder, then add carbon for mixing, and finally add anhydrous binder, Urotropine mixed vested refractory castable for tundish cover.

[0019] Its physical performance index is: 200℃×12h after baking, the compressive strength is 10.5MPa, and the bulk density is 2.20g / cm 3 ;After 1550℃×3h high temperature reburning, the ...

Embodiment 3

[0021] (1) The parts by weight of the raw materials used to prepare the refractory castable for the tundish cover are: 65 parts of magnesia, 13 parts of dolomite, 7 parts of zircon, 10 parts of carbon, 4.5 parts of anhydrous binder, urethane 0.5 parts of tropin; magnesia, dolomite, and zircon are mixed to make granules and fine powders, wherein the weight parts of granules and fine powders are: 45 parts of granules, 55 parts of fine powders, and the particle size range is 2.5mm , The fine powder particle size is 1.2mm.

[0022] (2) Premix magnesia, dolomite, and zircon to obtain a mixture, grind the mixture according to the weight of the above particles and fine powder, then add carbon for mixing, and finally add anhydrous binder, Urotropine mixed vested refractory castable for tundish cover.

[0023] Its physical performance index is: 200 ℃ × 12h after baking, the compressive strength is 10.8MPa, and the bulk density is 2.21g / cm 3 ;After 1550℃×3h high temperature reburning,...

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Abstract

The invention discloses a refractory castable for a tundish cover. The refractory castable is prepared from the following components in parts by weight: 50-80 parts of magnesia, 5-20 parts of dolomite, 5-10 parts of zircon, 1-20 parts of carbon, 2-5 parts of water-free binder and 0.2-1 part of urotropine. The magnesia, the dolomite and the zircon are mixed to prepare particles and fine powder, wherein the part number of the particles is 35-55, the part number of the fine powder is 45-65, the particle size of the particles ranges from 3.0 to 2.0mm, the particle size of the fine powder is 2.0-0.5mm. The refractory castable has excellent thermal shock resistance and breakage and peel resistance.

Description

technical field [0001] The invention belongs to the technical field of refractory materials, and in particular relates to a refractory castable for a tundish cover. 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, so they are widely used in the world. It has developed rapidly, and its proportion in the whole 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 unshaped refractory materials in Japan accounts for about 60% of the total refractory materials; in the United States, it is about 50%; in Britain, Germany, France and other countries, it...

Claims

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Application Information

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Patent Type & Authority Applications(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
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