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Aluminium titanate-zirconia composite slide plate and preparation method thereof

A technology of aluminum titanate and zirconia, which is applied in the field of refractory materials for steelmaking, can solve the problems of poor resistance to CaO corrosion, affecting product promotion and application, poor thermal shock stability, etc., and achieves high temperature wear resistance and slag corrosion resistance. Good, good scour resistance and thermal shock resistance, good thermal shock resistance

Active Publication Date: 2014-03-19
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Because the C element has excellent corrosion resistance and wear resistance, it is widely used in the slide plate, but it is easy to make a small amount of C element in the slide plate penetrate into the molten steel during steelmaking and continuous casting, thereby polluting the molten steel, especially It affects the quality of low-carbon steel and other steels, and its corrosion resistance to CaO is poor. It is not suitable for pouring of Ca-treated steel and Al / Si killed steel. When pouring Al-killed steel, the oxides in the slide plate are also easy Al reacts, resulting in Al 2 o 3 Accumulated and blocked casting holes, resulting in accidents
At present, there are a small number of corundum, aluminum-zirconium, zirconium, magnesium-aluminum spinel, corundum-mullite and magnesium-based non-carbon slide plates, which generally have a narrow range of applicable steel types and poor thermal shock stability. And other shortcomings, affecting the popularization and application of products

Method used

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  • Aluminium titanate-zirconia composite slide plate and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The raw materials and mass percentages used in this example are 25% of 3-5mm aluminum titanate, 30% of 1-3mm aluminum titanate, 20% of aluminum titanate particles not larger than 1mm, and 10% of aluminum titanate particles not larger than 325 mesh. %, not more than 325 mesh zirconia powder 15%, plus binder carboxymethyl cellulose 4%.

[0020] The preparation process is as follows: firstly, the aluminum titanate powder and zirconia powder in the raw materials are pre-mixed to form a mixed powder, and then kneaded according to the order of adding particles → binder → mixed powder, and then machine-pressed after the material is trapped. , The adobe is dried and then fired at 1500°C to produce an aluminum titanate-zirconia composite slide.

Embodiment 2

[0022] The raw materials and mass percentages used in this example are 15% of 3-5mm aluminum titanate, 40% of 1-3mm aluminum titanate, 10% of not larger than 1mm aluminum titanate particles, and not larger than 325 mesh aluminum titanate powder 14 %, not more than 325 mesh zirconia powder 21%, plus binder yellow dextrin 6%.

[0023] The preparation process is as follows: firstly, the aluminum titanate powder and zirconia powder in the raw materials are pre-mixed to form a mixed powder, and then kneaded according to the order of adding particles → binder → mixed powder, and then machine-pressed after the material is trapped. , The adobe is dried and then fired at 1450°C to obtain an aluminum titanate-zirconia composite slide.

Embodiment 3

[0025] The raw materials and mass percentages used in this example are 15% of 3-5mm aluminum titanate, 40% of 1-3mm aluminum titanate, 10% of aluminum titanate particles not larger than 1mm, and 16% of aluminum titanate particles not larger than 325 mesh. %, not more than 325 mesh zirconia powder 19%, plus binder lignin 6%.

[0026] The preparation process is as follows: firstly, the aluminum titanate powder and zirconia powder in the raw materials are pre-mixed to form a mixed powder, and then kneaded according to the order of adding particles → binder → mixed powder, and then machine-pressed after the material is trapped. , After the adobe is dried, it is fired at 1480°C to obtain an aluminum titanate-zirconia composite slide.

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Abstract

The invention relates to an aluminium titanate-zirconia composite slide plate and a preparation method thereof. The mass percentages of the components of the composite slide plate are as follows: 15-25% of aluminium titanate with the granularity of 3-5 mm, 30-40% of aluminium titanate particles with the granularity of 1-3 mm, 10-20% of aluminium titanate particles with the granularity less than or equal to 1 mm, 10-16% of aluminium titanate powder with the granularity less than or equal to 325 meshes, 13-21% of mullite powder with the granularity less than or equal to 325 meshes and 4-6% of an additional binding agent. The aluminium titanate-zirconia composite slide plate is obtained by the processes of mulling, shaping, sintering, etc. The aluminium titanate-zirconia composite slide plate has the characteristics of high compression strength and bending strength, good oxidation resistance, scouring resistance and thermal shock resistance, and the like, can meet the requirements of high-efficiency continuous casting and producing clean steel with high performance and high additional value, and the like, can solve the problem that large ladle liquid steel can not keep up with the medium ladle casting, and influences on safety, quality and the like by using the slide plate after submerged nozzle quick-change apparatuses are generally popularized and the service life of the medium ladle is prolonged greatly.

Description

technical field [0001] The invention belongs to the technical field of refractory materials for steelmaking, and in particular relates to an aluminum titanate-zirconia composite sliding plate and a preparation method thereof. Background technique [0002] The sliding plate is one of the main components of the sliding nozzle system for steelmaking. It is a functional refractory material for controlling the flow of molten steel. It is required to have high high temperature strength, excellent thermal shock stability, good oxidation resistance and erosion resistance. . [0003] Germany used the sliding nozzle for the first time in 1964 and achieved success, while my country began to promote the application of the sliding nozzle in the early 1970s. The sliding nozzle system has many advantages: the device is installed outside the steel drum, which is convenient for loading and unloading, and simplifies the preparation of the steel drum. , improve working conditions; pouring is s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/66
Inventor 杨建华
Owner BAOSHAN IRON & STEEL CO LTD