Alumina carbon refractory material for continuous casting

An aluminum-carbon refractory and alumina technology, applied in the field of refractory materials, can solve the problems of poor corrosion resistance and insufficient thermal shock stability, and achieve good thermal shock stability, excellent thermal shock stability and erosion resistance. sexual effect

Inactive Publication Date: 2012-10-03
上海宝明耐火材料苏州有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the current technology, the aluminum-carbon refractory has defects such as insufficient thermal shock stability and poor corrosion resistance, especially in the application of thin slab submerged nozzles and large long nozzles

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] An aluminum-carbon refractory material for continuous casting, its formula is as follows:

[0017] 100 mesh flake graphite 17.5 kg;

[0018] 150 mesh flake graphite 9.5 kg;

[0019] Fused brown corundum (80 mesh, namely D50=180 microns) 33.5 kg;

[0020] Activated alumina (D50=1.8μm) 5.5 kg;

[0021] Calcined alumina (D50=4μm) 23.7 kg;

[0022] Activated alumina (D50=0.7μm) 4 kg;

[0023] Metal silicon powder 5 kg;

[0024] 0.5 kg of boron carbide;

[0025] Boric acid 0.8 kg;

[0026] 13 kg of liquid phenolic resin.

[0027] According to the formula, the above-mentioned various raw materials are weighed, the various powders are placed in a high-speed granulator, mixed at low speed, and then liquid resin is added for high-speed granulation, and dried in a rotary drying kiln to give the blanks suitable molding properties. After a period of cooling and trapping, use a cold isostatic press for molding. After molding under different molding pressures, after curing and firing, the physical...

Embodiment 2

[0031] An aluminum-carbon refractory material for continuous casting, its formula is as follows:

[0032] 100 mesh flake graphite 20 kg;

[0033] 150 mesh flake graphite 5.5 kg;

[0034] Fused brown corundum (80 mesh, D50=180 microns) 41 kg;

[0035] Activated alumina (D50=1.8μm) 4 kg;

[0036] Calcined alumina (D50=4μm) 10 kg;

[0037] High temperature alumina (D50=10μm) 10 kg;

[0038] Activated alumina (D50=0.7μm) 3.5 kg;

[0039] Metal silicon powder 5 kg;

[0040] 0.5 kg of boron carbide;

[0041] 0.5 kg of boron glass powder;

[0042] 9 kg of solid phenolic resin;

[0043] 6 kg of liquid furfural resin.

[0044] Similarly, according to the formula, various raw materials are weighed, the various powders are placed in a high-speed granulator, mixed at low speed, and then liquid resin is added for high-speed granulation, and dried in a rotary drying kiln to give the blanks suitable molding properties. After a period of cooling and trapping, use a cold isostatic press for molding. The sinte...

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PUM

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Abstract

The invention relates to an alumina carbon refractory material for continuous casting, which comprises the components in parts by weight: 19-32 parts of crystalline flake graphite, 55-75 parts of aluminum oxide, 4-7 parts of sintering aid and 8-15 parts of resin. The alumina carbon refractory material takes the aluminum oxide and the graphite as main components, the particle size of aggregate fused corundum is within the range of 0.2-0.02mm, and a finer organizational structure is provided; proper sinterability is provided by alumina sources with different reaction activities; and the crystalline flake graphite and corundum granules are guaranteed to be coated with each other and evenly dispersed by graphite with different axial ratios. The alumina carbon refractory material for continuous casting has good thermal shock stability and corrosion erosion resistance.

Description

technical field [0001] The invention relates to a refractory material, in particular to an aluminum-carbon refractory material for continuous casting. Background technique [0002] The continuous casting process uses functional refractory materials such as submerged nozzles, long nozzles, stopper rods, etc., and the main body material is mostly aluminum-carbon refractory materials. In the current technology, the aluminum-carbon refractory has defects such as insufficient thermal shock stability and poor corrosion resistance, especially in the application of thin slab submerged nozzles and large shrouds. Contents of the invention [0003] In view of the deficiencies in the prior art. The technical problem to be solved by the present invention is to provide an aluminum-carbon refractory material for continuous casting, which has good thermal shock stability and strong corrosion resistance. [0004] An aluminum-carbon refractory material for continuous casting is composed o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66
Inventor 向敏董文全袁愈辉
Owner 上海宝明耐火材料苏州有限公司
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