Basic Info.
Refractoriness (℃)
1580< Refractoriness< 1770
Feature
Long Time Materials
Rul,Oc (0.2MPa,0.6%)
1650
Reheating Linear Change Rate %
0.3
Coefficient of Thermal Expansion
8.0
Applications
Petrochemical Industry Carbon Black Furnace Heat I
Trademark
Juda Refractories
Origin
Xinmi, Zhengzhou, Henan, China
Product Description
Hollow alumina sphere brick
Characters of Hollow alumina sphere brick
Alumina hollow sphere brick is made of alumina hollow ball as raw material, high-performance powder as additive, and organic material as the temporary binding agent, after mixing, drying, forming, firing at high temperature in shuttle kiln, the whole process is finished.
The quality of alumina hollow sphere brick has reached or exceeded the level of similar products at home and abroad.
Features:
1.Excellent thermal shock resistance, low thermal conductivity and good performance of insulation.
2.High temperature resistance as Al2O3 content is≥85%.
3.Reduce furnace weight as there are amount of closed pores in alumina bubble brick.
4.Strong ability to resist erosion of gas and slag.
5.Direct contact with flame.
Alumina hollow ball has obvious thermal insulation properties, low thermal conductivity, can have very good heat preservation effect, reduce the heat dissipation, increase thermal efficiency, thereby reach the purpose of saving energy. Energy saving effect can reach more than 30%.
Applications of Hollow alumina sphere brick
Widely used on super high temperature furnace such as gasification furnace in petrochemical industry, reacting furnace in Carbon Black Industry, electric induction furnace in metallurgical industry, the energy saving effect is very satisfied.
Physical and Chemical Index.
Item | Bubble Alumina | Bubble zirconia | Sialon combined Al2O3bubble brick |
LKZ-88 | LKZ-98 | ZKZ-98 | -- |
Max.Temp ºC | 1650 | 1800 | 2000~ 2200 | 1600 |
Al2O3 , % ≥ | 88 | 99 | - | 70 |
ZrO2 , % ≥ | - | - | 9.8 | - |
SiO2 , % ≤ | - | 0.2 | 0.2 | - |
Fe2O3 , % ≤ | 0.3 | 0.15 | 0.2 | N≥5 |
BD , g/cm3 | 1.30~1.45 | 1.40~1.65 | ≤ 3.0 | ≤ 1.5 |
CCS,MPa,≥ | 10 | 9 | 8 | 15 |
RUL,ºC (0.2MPa,0.6%)≥ | 1650 | 1700 | 1700 | 1700 |
reheating linear change rate % 1600ºC×3hrs | ±0.3 | ±0.3 | ±0.2 | - |
coefficient of thermal expansion,×10-6 (room temperature,~1300ºC) | ~8.0 | ~8.6 | - | TSR,times (1100ºCwater-cooling)≥15 |
TC,W/(m.K),≤ (average temperature 800ºC) | 0.9 | 1.0 | 0.5 | 1.1 |
Applications | petrochemical industry Carbon black furnace heat insulation lining, ceramics, refractory materials and other high temperature furnace lining. | petrochemical industry Carbon black furnace heat insulation lining, gasifier, gasification furnace high temperature ceramics, refractory and insulating lining of kiln lining. | Used for fire hard, super hard alloy vacuum intermediate-frequency ultra high temperature furnace lining, insulating layer, also can be used for other 2000 ~ 2200 ºC high temperature furnace lining |
Address:
Xidajie, Zhengzhou, Henan, China
Business Type:
Manufacturer/Factory
Business Range:
Metallurgy, Mineral & Energy
Management System Certification:
ISO 9001, ISO 9000, ISO 14001
Company Introduction:
Zhengzhou Juda Refractory Material Co., Ltd. is located in the hinterland of Central Plains, at the foot of Songshan Mountain, and adjacent to Zhengshao Highway, Longhai and Jingguang railways. The convenient transportation, abundant resources and high quality minerals provide favorable conditions for the production of refractory materials.