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Compact calcium hexaluminate cast material and preparation method thereof

A calcium hexaaluminate and castable technology, which is applied in the field of refractory materials and its preparation, can solve the problems of low service life, steel inclusions, and low strength of magnesium materials, and achieve good corrosion resistance, high chemical purity, high strength and The effect of refractoriness

Inactive Publication Date: 2017-12-22
WUHAN WINNING TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] (1), because it contains SiO 2 , Fe 2 o 3 etc., resulting in SiO 2 +[Al]→[Si]+Al 2 o 3 and Fe 2 o 3 +[Al]→[Fe]+Al 2 o 3 and other reactions, which lead to the formation of inclusions in the steel and affect the quality of the steel
[0006] (2) The strength of magnesia materials at high temperature is very low, and the service life is very low, causing a large amount of working lining materials to enter the slag or steel, forming inclusions, and also causing a lot of waste
[0007] (3) The entry of components in magnesia materials can easily lead to the formation of spinel inclusions and magnesium oxide inclusions in steel, and also lead to hydrogenation in steel
[0015] How to use bulk density higher than 2.8g / cm 3 the CA 6 Preparation of castables for working linings of tundishes and ladles has not been reported yet

Method used

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  • Compact calcium hexaluminate cast material and preparation method thereof
  • Compact calcium hexaluminate cast material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A dense calcium hexaaluminate castable, comprising the following raw materials in weight percent:

[0036] 15% calcium hexaaluminate raw material with a particle size of 3-5 mm,

[0037] 30% calcium hexaaluminate raw material with a particle size of 1-3 mm,

[0038] 10% calcium hexaaluminate raw material with a particle size of 0.088-1 mm,

[0039] 10% corundum raw material with a particle size of 0.088-1 mm,

[0040] Calcium hexaaluminate raw materials with a particle size less than 88 μm 15%,

[0041] 15% of sintered corundum powder with particle size less than 88μm,

[0042] Pure aluminate cement 5%,

[0043] Add 0.1% of the water reducer by the total weight of the above-mentioned raw materials.

[0044] Mix the above-mentioned various raw materials in proportion, and stir to form a mixture; add 8% water of the total weight of the mixture to the mixture, stir evenly, and vibrate for 30 seconds; After curing for 24 hours, it is demolded and dried at 110°C for 24...

Embodiment 2

[0046] A dense calcium hexaaluminate castable, comprising the following raw materials in weight percent:

[0047] 30% calcium hexaaluminate raw material with a particle size of 3-5 mm,

[0048] 10% calcium hexaaluminate raw material with a particle size of 1-3 mm,

[0049] 30% of calcium hexaaluminate raw materials with a particle size of less than 88 μm,

[0050] α-Al 2 o 3 Micronized 10%,

[0051] Pure aluminate cement 10%,

[0052] Spinel 10%;

[0053] Add 0.45% of the water reducer by the total weight of the above raw materials.

[0054] Mix the above-mentioned various raw materials in proportion, and stir to form a mixture; add 6% water of the total weight of the mixture to the mixture, stir evenly, and vibrate for 30 seconds; After curing for 24 hours, it is demolded and dried at 110°C for 24 hours.

Embodiment 3

[0056] A dense calcium hexaaluminate castable, comprising the following raw materials in weight percent:

[0057] 45% calcium hexaaluminate raw material with a particle size of 3-5mm,

[0058] 20% calcium hexaaluminate raw material with a particle size of 1-3mm,

[0059] 15% of sintered corundum powder with particle size less than 88μm,

[0060] α-Al 2 o 3 Micronized 5%,

[0061] Pure aluminate cement 15%,

[0062] Add 0.8% of the water reducer by the total weight of the above-mentioned raw materials.

[0063] Mix the above-mentioned various raw materials in proportion, and stir evenly to form a mixture; add 7% water of the total weight of the mixture to the mixture, stir evenly, vibrate molding, and the vibration time is 30 seconds; After curing for 24 hours, it is demolded and dried at 110°C for 24 hours.

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Abstract

The invention relates to a compact calcium hexaluminate cast material, which is prepared from the following raw materials in percentage by weight: 15 to 45 percent of calcium hexaluminate raw materials with the particle diameters being 3 to 5mm, 10 to 30 percent of calcium hexaluminate raw materials with the particle diameters being 3 to 5mm, 0 to 20 percent of calcium hexaluminate raw materials with the particle diameters being 0.088 to 1mm, 0 to 20 percent of corundum raw materials with the particle diameters being 0.088 to 1mm, 0 to 30 percent of calcium hexaluminate raw materials with the particle diameters being smaller than 88 mum, 0 to 30 percent of sintered corundum powder with the being smaller than 88 mum, 0 to 10 percent of alpha-Al2O3 micro powder, 5 to 15 percent of pure aluminate cement and 0 to 20 percent of spinelle. The compact calcium hexaluminate cast material provided by the invention has the advantages that the chemical purity is high; mineral facies generated through reaction at high temperature are all high-melting-point facies; the intensity and the fire-resistant degree are high; the anti-erosion and anti-peeling performance is good; the purification effect is achieved on molten steel.

Description

technical field [0001] The invention relates to a refractory material and a preparation method thereof, in particular to a preparation method of a dense calcium hexaaluminate castable. Background technique [0002] Tundish and ladle are important thermal equipment in the metallurgical process, which mainly play the role of receiving, transporting, refining and pouring molten steel. As the performance and quality requirements of steel products in various industries and fields are also greatly improved, the requirements for refractory materials lining tundishes and ladles are also gradually increasing, and refractory materials are gradually endowed with functions. [0003] As the last container of molten steel continuous casting, the tundish has a great influence on molten steel, and it is also a very important aspect that causes inclusions in steel. As a tundish container, the working lining material in direct contact with molten steel has been MgO material in recent decades...

Claims

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Application Information

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IPC IPC(8): C04B35/44C04B35/66
CPCC04B35/44C04B35/66C04B2235/3217C04B2235/77C04B2235/96C04B2235/9615
Inventor 陈俊红刘忠江李斌侯新梅杜珏玉冯广
Owner WUHAN WINNING TECH
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