High strength high temperature resistance semi-lightweight high alumina castable and its preparation method

A high-aluminum castable and high-temperature-resistant technology, which is applied in the field of high-strength, high-temperature-resistant, semi-lightweight, high-aluminum castable and its preparation, can solve the problems of low mechanical strength, high cost, low mechanical strength and the like

Inactive Publication Date: 2012-02-15
MAANSHAN TAILAI METALLURGICAL FURNACE CHARGE
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  • Summary
  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

Lightweight castables are characterized by good heat insulation and heat preservation performance, and have a good energy-saving effect when used in thermal equipment. However, the fatal weakness of general lightweight

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The first step is to prepare materials. The high-alumina hollow ceramsite, the main material of the matrix, is crushed, screened into two specifications with a particle size of 5-10mm and a particle size of 1-5mm, and packed for later use. The materials used for auxiliary materials and admixtures are crushed, processed, screened, and packaged one by one according to the specifications.

[0032] The second step, ingredients. According to 500kg / component, strictly measure, configure the base material, auxiliary material and admixture. The main material of the matrix is ​​40% of high-alumina hollow ceramsite with a particle size of 5-10mm, and 20% of high-alumina hollow ceramsite with a particle size of 1-5mm. The auxiliary materials are 5% of kyanite with a particle size of 0-0.23mm, 3% of silicon micropowder with a particle size of 2μ-4μ, 10% of super-grade coke powder with a particle size of 0.074mm, 2% of Yixing clay with a particle size of 0.088mm, and a particle si...

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PUM

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Abstract

The invention discloses a high strength high temperature resistance semi-lightweight high alumina castable and its preparation method. The castable is prepared by mixing 60 wt% of a grading high alumina hollow ceramsite main material, 40 wt% of an auxiliary material and 0.55 wt% of an additive, wherein the main material is made from the matrix of high alumina hollow ceramsite with the particle size being 5-10mm and high alumina hollow ceramsite with the particle size being 1-5mm; the auxiliary material is composed of an expanding agent, a filler, a hard clay powder, binding clay, a volume density modifying agent and a calcium aluminate cement; and the additive is composed of a water-reducing dispersant and an anti-knock agent. The castable prepared in the invention has advantages of high strength, high temperature resistance and semi-lightweight. Detected after sintering for 3 hours at the temperature of 1350 DEG C, the average value of volume density is 1.77g/cm<3>, the average value of flexural strength is 11.4MPa, and the average value of compressive strength is 85.3MPa. Chemical components contain 35.60% of SiO2 and 48.50% of Al2O3.

Description

technical field [0001] The invention belongs to the technical field of refractory materials, and relates to a castable and a preparation method thereof, in particular to a high-strength, high-temperature-resistant semi-light high-alumina castable and a preparation method thereof. The castable is widely used in metallurgy, building materials, and chemical furnaces and kilns On thermal equipment, it can be used as heat insulation, thermal insulation layer, permanent lining and working lining, and can also be used as lining of high-temperature conveying pipes. It is especially suitable for on-site construction of heterogeneous equipment materials, such as ladle covers, ladle ovens, etc. Background technique [0002] In the field of refractory materials, heavy, light and semi-light castables are generally divided by volume density, and the volume density is greater than or equal to 1.8g / cm 3 It is called heavy castable, and its bulk density is less than or equal to 1.0g / cm 3 Kn...

Claims

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Application Information

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IPC IPC(8): C04B35/66
Inventor 梁行超龚强潘成芳梁全赵清玉
Owner MAANSHAN TAILAI METALLURGICAL FURNACE CHARGE
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