Aluminium titanate mullite composite monoblock stopper and preparation method thereof

An integral plug rod, aluminum titanate technology, applied in the field of refractory materials for steelmaking, can solve problems such as large difference in composition, difference in thermal expansion coefficient of materials, and rod head falling off, and achieve strong slag corrosion resistance, long service life, The effect of strong anti-corrosion ability of molten steel

Active Publication Date: 2013-01-30
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, due to the large difference in composition between the rod body and the rod head, the thermal expansion coefficient of the material

Method used

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  • Aluminium titanate mullite composite monoblock stopper and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] In this embodiment, the raw materials and mass percentages used in the aluminum titanate-mullite composite integral stopper rod are 25% of 1-3mm mullite particles, 5% of 1-3mm aluminum titanate particles, and no more than 1mm mullite particles 20%, 15% aluminum titanate particles not larger than 1mm, 10% aluminum titanate powder not larger than 325 mesh, 25% mullite powder not larger than 325 mesh, plus 3% yellow dextrin.

[0017] The preparation process is as follows: first pre-mix the aluminum titanate powder and mullite powder in the raw materials to make a mixed powder, and then mix and knead according to the order of granules→binder→mixed powder, press and shape after trapping the materials, and form The pressure is 120MPa, and the adobe is fired at 1500°C after drying.

Embodiment 2

[0019] In this embodiment, the raw materials and mass percentages used in the aluminum titanate-mullite composite integral stopper are 15% of 1-3mm mullite particles, 15% of 1-3mm aluminum titanate particles, and no more than 1mm mullite particles 10%, 25% aluminum titanate particles not larger than 1mm, 16% aluminum titanate powder not larger than 325 mesh, 19% mullite powder not larger than 325 mesh, plus 4% lignin.

[0020] The preparation process is as follows: first pre-mix the aluminum titanate powder and mullite powder in the raw materials to make a mixed powder, and then mix and knead according to the order of granules→binder→mixed powder, press and shape after trapping the materials, and form The pressure is 110MPa, and the adobe is fired at 1550°C after drying.

Embodiment 3

[0022] In this embodiment, the raw materials and mass percentages used in the aluminum titanate-mullite composite integral stopper are 20% of 1-3mm mullite particles, 10% of 1-3mm aluminum titanate particles, and no more than 1mm mullite particles 15%, 20% of aluminum titanate particles not larger than 1mm, 13% of aluminum titanate powder not larger than 325 mesh, 22% of mullite powder not larger than 325 mesh, plus 5% of pulp waste liquid.

[0023] The preparation process is as follows: first pre-mix the aluminum titanate powder and mullite powder in the raw materials to make a mixed powder, and then mix and knead according to the order of granules→binder→mixed powder, press and shape after trapping the materials, and form The pressure is 115MPa, and the adobe is fired at 1550°C after drying.

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PUM

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Abstract

The invention relates to an aluminium titanate mullite composite monoblock stopper and a preparation method thereof. The stopper body and the stopper head of the monoblock stopper are prepared by the same materials. The mass percentages of the materials are as follows: 15-25% of mullite particles with the granularity of 1-3 mm, 5-15% of aluminium titanate particles with the granularity of 1-3 mm, 10-20% of mullite particles with the granularity less than or equal to 1 mm, 15-25% 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, 19-25% of mullite powder with the granularity less than or equal to 325 meshes and 3-5% of an additional binding agent. The monoblock stopper has excellent whole structural properties, prevents the oxidation problem produced by using carbon-containing materials, has relatively high liquid erosion resistance and relatively long service life, can solve the problems of falling off of sleeve brick-type stopper head and stopper cracking, simultaneously creates conditions for casting high oxygen and ultra-low carbon steel, and provides conditions for guarantee of the service life of the stopper after a submerged nozzle is changed quickly.

Description

technical field [0001] The invention belongs to the technical field of refractory materials for steelmaking, and relates to an aluminum titanate-mullite composite integral stopper and a preparation method thereof. Background technique [0002] At present, the continuous casting tundish generally adopts the integral stopper and the submerged nozzle as the flow control system. For example, some continuous casting machines adopt the double insurance flow control method of stopper and slide plate, and some continuous casting machines adopt the open pouring slide plate flow control method. , or stopper rod control method. With the analysis of the flow field of the mold and the in-depth research on the control of slab slag inclusion, the stopper rod flow control method has gradually become the trend of the next casting machine flow control method improvement. The requirements for flushing and stability have been greatly increased. [0003] The overall stopper rod is generally ma...

Claims

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Application Information

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IPC IPC(8): C04B35/472C04B35/185C04B35/622
Inventor 杨建华
Owner BAOSHAN IRON & STEEL CO LTD
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