Brown fused alumina is made of bauxite and coke (anthracite) as the main raw materials, and is smelted at high temperature in an electric arc furnace. The main chemical composition of brown corundum is AL2O3, its content is 94.5%-97%, and it also contains a small amount of Fe, Si, Ti, etc. Brown fused alumina has the characteristics of high purity, good crystallization, strong fluidity, low linear expansion coefficient and corrosion resistance.
crystal form | Trigonal system | ||
chemical properties | both sexes | ||
react with acid | Slightly reactive in aqua regia and hydrofluoric acid | ||
react with alkali | Reacts only slowly with hot solutions of strong bases | ||
Redox reactions | no | ||
Density (g/cm³) | 3.97 | ||
hardness | Knoop | 2000-2200 Kg/c㎡ | |
Mohs | 9 | ||
color | dark brown | ||
Calcined color | light blue | ||
melting point | 20000C | ||
Maximum operating temperature | 19000C | ||
Specific heat ((cal/g.0c) | 0.26 (20-290C) | ||
Thermal conductivity (Cal/cm³. sec. C) | room temperature | 9000C | |
0.047 | 0.013 |
Resistivity (Wcm) | 300C | 3000C | 9000C | 16000C | |||||
1016 | 1013 | 105 | 104 | ||||||
Linear expansion coefficient | 7-9(0-16000C) | ||||||||
chemical composition | 10#-90# | 100#-180# | 200#-220# | 230#-400# | 500#-1200# | ||||
AL2O3 | 94.5-97.0 | 93.5min | 92.5min | 91.0min | 89.0min | ||||
Na₂O | 1.5-3.8 | 1.5-3.8 | 1.5-3.8 | 4.0max | 4.0max |
Chemical and physical properties:
Magnetic substance content (calculated by weight percentage)
granularity | Magnetic substance content |
16#--30# | <0.0380 |
36#-60# | <0.0280 |
70#-120# | <0.0230 |
150#-220# | <0.0170 |
available granularity
F12.F14.F16.F18.F20.F22.F24.F36.F40.F46.F54.F60.F70.F80.F90.F100.F120.F150.F180 |
F220.F230.F240.F280.F320.F360.F400.F500.F600.F800.F1200.F1600 |
JIS240.JIS280.JIS320.JIS360.JIS400.JIS500.JIS600.JIS800.JIS1200.JIS1500 , JIS2000.JIS2500 , JIS3000 |
P24.P30.P36.P40.P50.P60.P70.P80.P90.P100.P120.P150 |
P180.P220.P240.P280.P320.P360.P400.P500.P600.P800.P1000.P1200 |
Other granularities can be customized according to customer requirements |
use:
Ceramic Abrasives | grinding |
Resin abrasive | sandblasting |
Coated Abrasives | Polish |
barrel polishing | Deburring |
Automatic Roll Polishing | non-slip |
Abrasive paste | wire saw |
Package:
25 kg package, and can also be packaged according to customer requirements.
PTING Technology, founded in 2005, is a well-known domestic brand of surface treatment and environmental protection equipment system solutions. As China Sandblasted brown corundum Suppliers and Wholesale Sandblasted brown corundum Factory, it is committed to the R&D and manufacturing of process technology and equipment in the field of industrial surface treatment and environmental treatment. The enterprise has passed the ISO9001 quality system certification. The R&D and manufacturing base, with a building area of 25000 square meters, is located in Ningbo, China. With PTING's global overseas center in Singapore and more than 20 national offices, PTING Technology has provided surface treatment equipment, environmental protection equipment and process technology services to more than 2000 users worldwide. Users are widely distributed in: home appliance manufacturing, digital electronics, auto parts manufacturing, hardware and bathroom, new materials, new energy, rail transit, aerospace, petrochemical power, marine engineering, heavy industry equipment, agricultural machinery, engineering machinery Furniture manufacturing, etc.
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