Calcium aluminate cement-combined corundum castable and preparation method thereof

A technology of calcium aluminate cement and corundum, applied in the field of refractory materials, can solve the problems of low strength, achieve low cost, improve performance, increase strength and corrosion resistance

Active Publication Date: 2015-09-16
湖北安耐捷炉衬材料有限公司
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

However, the strength of the calcium aluminate cement-bonded co

Method used

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  • Calcium aluminate cement-combined corundum castable and preparation method thereof

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[0025] The invention provides a method for preparing a calcium aluminate cement-bonded corundum castable, comprising the following steps: 70-88 parts by weight of platy corundum particles, 0.1-10 parts by weight of platy corundum fine powder, 5-10 parts by weight Active alumina micropowder in parts by weight, calcium aluminate cement in 0.5-8 parts by weight, microsilica powder in 1 part by weight, titanium dioxide / calcium carbonate / magnesia composite micropowder additive in 0.1-10 parts by weight, water reducing agent and water are mixed, Vibration molding after stirring, curing for 20-30 hours at a temperature of 20-50°C and a relative humidity of 80-100%, then raising the temperature to 100-150°C for 12-36 hours to obtain calcium aluminate cement bonded corundum casting material.

[0026] In the above preparation process, the present invention uses calcium aluminate cement as a binder, tabular alumina and activated alumina as main components, and uses titanium dioxide / calci...

Embodiment 1

[0059] Preparation of Titanium Dioxide / Calcium Carbonate / Magnesium Oxide Composite Micropowder Additive

[0060] Mix titanium dioxide, calcium carbonate and magnesium oxide with a weight ratio of 40:50:10, and grind to a particle size ≦10 μm, and the average particle size d 50 =2.4 μm, to obtain titanium oxide / calcium carbonate / magnesia composite micropowder additive.

Embodiment 2

[0062] Prepare the above-mentioned platy corundum particles, 6.8 parts by weight of platy corundum fine powder, 7 parts by weight of activated alumina micropowder, 3.7 parts by weight of calcium aluminate cement, 1 part by weight of silica micropowder, and 2.5 parts by weight of Example 1 Titanium dioxide / calcium carbonate / magnesia composite micropowder additive, 0.2 parts by weight of water reducer and 4.3 parts by weight of water are mixed, stirred evenly, formed by vibration, and cured for 24 hours at a temperature of 25°C and a relative humidity of 100%. , the temperature was raised to 110° C. and kept for 24 hours to obtain a calcium aluminate cement bonded corundum castable.

[0063] The calcium aluminate cement bonded corundum castable prepared in this example was treated at 1450° C. for 5 hours, and its flexural strength at room temperature was tested, as shown in Table 1.

[0064] Example 2:

[0065] Prepare the above-mentioned platy corundum particles, 6.6 parts by ...

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Abstract

The invention discloses calcium aluminate cement-combined corundum castable and a preparation method thereof. With calcium aluminate cement as a binding agent, tabular corundum and activated aluminum oxide as main components, and titanium dioxide/calcium carbonate/magnesium oxide micro-powder as a compound additive, the high-strength calcium aluminate cement-combined corundum castable is prepared. By combining with the characteristics of accelerating sintering by virtue of titanium dioxide and forming spinel and calcium carbonate to convert into high-activity calcium oxide at a high temperature by reaction of magnesium oxide and corundum, the strength of the corundum castable is greatly improved. The prepared high-strength calcium aluminate cement-combined corundum castable has excellent performance, and can be applicable to the industries such as building materials, metallurgy and petrifaction; and the service life of equipment such as a cement kiln opening, a coal-injection duct, an induction furnace lining and a high-temperature wear-resisting lining is effectively prolonged.

Description

technical field [0001] The invention relates to the technical field of refractory materials, in particular to a calcium aluminate cement-bonded corundum castable and a preparation method thereof. Background technique [0002] Unshaped refractory material refers to the mixture composed of aggregate, fine powder, binder and additives, which is used directly in the delivery state of bulk material. Unshaped refractory materials represented by castables have the advantages of short process flow, low production energy consumption and cost, and wide application range. In 2012, the proportion of China's unshaped refractories in the total refractory production exceeded 40% for the first time, but compared with industrially developed countries, the proportion of China's unshaped refractories is low, and its goal is to reach 60% in 2020. [0003] In recent years, with the growing demand of the national economy for high-quality steel materials, especially clean steel, the working condi...

Claims

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Application Information

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IPC IPC(8): C04B35/66
Inventor 员文杰朱青友李君尹贺邓承继祝洪喜
Owner 湖北安耐捷炉衬材料有限公司
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