High-performance anti-knock castable for circulating fluidized beds and preparation method thereof
A circulating fluidized bed, high-performance technology, applied in the field of refractory castable equipment, can solve the problems of uneven mixing of components, poor thermal shock stability, poor corrosion resistance, etc., to improve anti-knock performance and corrosion resistance , good corrosion resistance
Active Publication Date: 2014-11-26
宜兴市中环耐火材料有限公司
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- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0002] Since the fuel of the CFB boiler is coked during operation, the air cap will be blocked and cannot operate normally, and the furnace wall is prone to structural spalling at high temperatures above 1000 degrees for a long time, and the thermal shock stability is poor. Bumps appear, causing collapse accidents. The castables in the prior art tend to cause uneven mixing of components during the mixing process, insufficient strength, and poor corrosion resistance. The above defects need to be further improved
Method used
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Experimental program
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Effect test
Embodiment 1
[0013] Example 1: First prepare aggregate according to the ratio: aggregate includes mass percentage: YZ-80 rotary kiln bauxite 3-5mm 230kg, YZ-80 rotary kiln bauxite 1-3mm 230kg, YZ-80 rotary kiln bauxite 0~ 1mm 160kg, YZ-80 rotary kiln bauxite 220# 150kg, gangmo material 60kg, cyanite 40kg, red column powder 29.2kg, silicon nitride 25kg; add the aggregate to the mixer and stir well, then add fine powder, The fine powder includes mass percent: 39.5kg of superfine composite micropowder, 25kg of binder; then add 0.8kg of explosion-proof fiber according to the proportion and stir three times, add polyethylene glycol 0.5Kg according to the proportion, stir four times, fully stir evenly, to get the finished product.
Embodiment 2~6
[0014] Embodiment 2~6, with reference to embodiment 1, change parameter:
[0015]
[0016] Product technical indicators:
[0017] Change rate of burning line -0.6-0
[0018] Anti-burst temperature ≤0.55m / ㎡
[0019] Abrasion 5㎝3
[0020] Coking rate ≤5%
[0021] Carbon dioxide emission ≤0.05g / m3.
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Abstract
The invention discloses a high-performance anti-knock castable for circulating fluidized beds and a preparation method thereof. The high-performance anti-knock castable comprises aggregate and a fine powder; the aggregate comprises, in percent by mass, 15%-24% of YZ-80 rotary kiln alumina with the fineness of 3-5mm, 10%-35% of YZ-80 rotary kiln alumina with the fineness of 1-3mm, 8%-23% of YZ-80 rotary kiln alumina with the fineness of 0-1mm, 5-18% of YZ-80 rotary kiln alumina 220#, 1%-10% of a corundum-mullite materia, 2%-6% of kyanite, 1%-2.92% of andalusite powder, and 1%-2.5% of silicon nitride; and the fine powder comprises, in percent by mass, 1%-3.95% of a micro powder, 1%-2.5% of a binder, 0.01%-0.05% of polyethylene glycol, and 0.05%-0.08% of explosion-proof fiber. The high-performance anti-knock castable can keep volume stability at a high temperature, reduce structure peeling and improve thermal-shock stability, and is good in antiknock performance, high in bonding strength and resistant to corrosion.
Description
technical field [0001] The invention relates to the field of refractory castable equipment, in particular to castables for circulating fluidized bed boilers. Background technique [0002] Since the fuel of the CFB boiler is coked during operation, the air cap will be blocked and cannot operate normally, and the furnace wall is prone to structural spalling at high temperatures above 1000 degrees for a long time, and the thermal shock stability is poor. Bumps appear, causing collapse accidents. The castables of the prior art tend to cause uneven mixing of components during the mixing process, insufficient strength, and poor corrosion resistance. The above defects need to be further improved. Contents of the invention [0003] Aiming at the deficiencies of the prior art, the present invention provides a high-performance cycle that can maintain the volume stability of the castable at high temperature, reduce structural peeling, improve thermal shock stability, good anti-knock ...
Claims
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IPC IPC(8): C04B35/66
Inventor 袁根芳许宬铭
Owner 宜兴市中环耐火材料有限公司