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Preparation and detection method of ultralow carbon aluminum carbon fireproof material

A technology of aluminum-carbon refractory material and detection method, which is applied in the direction of analyzing materials, material thermal development, material analysis using wave/particle radiation, etc., can solve the problems of thermal shock resistance and slag erosion resistance of refractory products, etc. Achieve the effect of improving thermal shock resistance and slag corrosion resistance, which is beneficial to mass production, and has good thermal shock resistance and slag resistance.

Inactive Publication Date: 2019-01-15
苏州佳耐材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the reduction of graphite content in ultra-low carbon / low carbon aluminum carbon materials, the thermal shock resistance and slag erosion resistance of refractory products are significantly reduced.

Method used

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  • Preparation and detection method of ultralow carbon aluminum carbon fireproof material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] A method for preparing and detecting an ultra-low-carbon aluminum-carbon refractory material, comprising the following steps:

[0041] Step 1. SiC-Al 2 o 3 Synthesis of composite micropowder:

[0042] (1) pyrophyllite and carbon black are weighed according to the mass ratio of 1000:200, and stirred and mixed;

[0043] (2) Put the mixed raw materials into a high-temperature furnace, heat at 1650°C for 4 hours, and carry out carbothermal reduction reaction under argon to synthesize SiC-Al 2 o 3 Composite micropowder;

[0044] (3) SiC-Al 2 o 3 The composite micropowder is kept at 700°C for 2 hours in air to remove excess carbon;

[0045] Step 2, SiC-Al 2 o 3 Preparation and thermal shock resistance test of improved ultra-low carbon aluminum-carbon refractory samples:

[0046] (1) Fused corundum, natural graphite, SiC-Al 2 o 3 The composite micropowder is weighed according to the mass ratio of 930:20:50, and the liquid phenolic resin of 1% (mass fraction) of the...

Embodiment 2

[0060] A preparation and detection method of an ultra-low-carbon aluminum-carbon refractory material, the same as in Example 1, except that:

[0061] (1) Pyrophyllite and carbon black used in step 1(1) are changed into fly ash and gac, and its mass proportion is 1000:500;

[0062] (2) Preparation of SiC-Al in step 1(2) 2 o 3 The temperature of the composite micropowder is 1600°C;

[0063] After testing, the main crystal phases of the obtained composite micropowder are β-SiC, α-Al 2 o 3 , also contains a small amount of FeSi; the particle size of the micropowder is about 1 μm. Adding it to ultra-low carbon aluminum-carbon refractory materials, it is found that the thermal shock resistance and slag resistance of the refractory products are better. The number of thermal shock cycles is 15, the strength retention rate is 40.6%, and the thickness of the erosion layer is 0.8mm.

Embodiment 3

[0065] A preparation and detection method of an ultra-low-carbon aluminum-carbon refractory material is the same as in Example 1, except that the raw materials for preparing the SiC-based synthetic material are coal gangue and carbon black, and the mass ratio is 1000:400.

[0066] After testing, the resulting SiC-Al 2 o 3 The main crystal phases of composite micropowder are β-SiC, α-Al 2 o 3 ; The particle size of the micropowder is about 1 μm. Adding it to ultra-low carbon aluminum-carbon refractory materials, it is found that the thermal shock resistance and slag resistance of the refractory products are better. The number of thermal shock cycles is 18, the strength retention rate is 45.6%, and the thickness of the erosion layer is 0.5mm.

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Abstract

The invention relates to a preparation and detection method of an ultralow-carbon aluminum carbon fireproof material, and belongs to the technical field of fireproof material preparation for steel andiron metallurgy. SiO2-based natural ore or waste slag and a carbon source are sufficiently and uniformly mixed and are put into a high-temperature furnace for preparing a SiC-based synthesis materialin inert or reduction atmosphere; then, according to a certain proportional ratio, the SiC-based synthesis material is added into the ultralow-carbon aluminum carbon fireproof material raw materialsto be sufficiently mixed; after the shaping, drying and high-temperature heat treatment, the ultralow-carbon aluminum carbon fireproof material with the improved silicon carbide base synthesis material is obtained; finally, heat shock resistant performance and slag resistant performance experiments are performed by using a heat shock test furnace and a static crucible method. The method has the advantages that on the premise of reducing the carbon content of the aluminum carbon fireproof material, the heat shock resistant performance and the slag resistant performance are improved; the qualityrequirement of the steel and iron metallurgy process on relevant fireproof material components can be reached; the process is simple and convenient; the implementation is easy; the raw materials arecheap and can be easily obtained; the mass production can be easily realized; good economic benefits and environment-friendly benefits are realized.

Description

technical field [0001] The invention belongs to the technical field of preparation of refractory materials for iron and steel metallurgy, and relates to a preparation and detection method of ultra-low carbon aluminum-carbon refractory materials. Background technique [0002] Aluminum carbon (Al 2 o 3 -C) Refractory materials have good chemical stability, corrosion resistance, thermal shock resistance and high temperature strength, and are widely used in blast furnaces, continuous casting tundishes (slide plates, long nozzles, submerged nozzles, integral stopper rods) and molten iron preheating Handle container liners, etc. However, the carbon content (mass fraction) of aluminum-carbon refractories is generally about 10%, and serious problems such as rapid heat conduction, heat loss, and release of greenhouse gases will occur during the casting process. The environmental and ultra-low carbon steel production aspects are of particular importance. [0003] In order to reduc...

Claims

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Application Information

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IPC IPC(8): C04B35/66G01N25/20G01N3/22G01N23/207
CPCC04B35/66G01N3/22G01N23/207G01N25/20
Inventor 马北越张亚然于敬雨任鑫明苏畅吴桦高陟石明东
Owner 苏州佳耐材料科技有限公司
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