Brown corundum is made of high-quality abrasive-grade bauxite with auxiliary materials, and is refined in an electric arc furnace at a high temperature above 2250 °C.
the RS brown corundum produced by our company has the characteristics of high purity, good crystallization, strong fluidity, low coefficient of linear expansion and corrosion resistance. the product has the characteristics of no explosion, no pulverization and no cracking during the application process, and is often used in the abrasives and refractory raw material industries.

the smelting method of brown corundum can be divided into: dumping furnace and fixed furnace.
the main products are: brown corundum Barmac sand, roller sand, ball grinding sand, segment sand, P sand, fine powder, micro powder.
Special treatment products are: high temperature calcined brown corundum, medium temperature calcined brown corundum, water washing, pickling, dry cleaning (air washing).

Scope of application
Abrasives: grinding wheel, abrasive belt, sandpaper, abrasive cloth, cutting disc, sandblasting process, grinding, wear-resistant floor, water jet cutting, coated abrasive, bonded abrasive, etc.
Refractory materials: castable, refractory brick, ramming material, slide plate, nozzle, ladle, furnace lining, precision casting, etc.
Ruishi brand brown corundum physical and chemical indicators:
Application Specifications Main Chemical Composition % Magnetic Matter %
Al2O3 Fe2O3 SiO2 TiO2
Abrasives F 4#80# ≥95 ≤0.3 ≤1.5 ≤3.0 ≤0.05
90#150# ≥94 ≤0.03
180#240# ≥93 ≤0.3 ≤1.5 ≤3.5 ≤0.02
P 8#80# ≥95.0 ≤0.2 ≤1.2 ≤3.0 ≤0.05
100#150# ≥94.0 ≤0.03
180#220# ≥93.0 ≤0.3 ≤1.5 ≤3.5 ≤0.02
W 1#-63# ≥92.5 ≤0.5 ≤1.8 ≤4.0
Refractory segment sand 0-1mm
1-3mm
3-5mm
5-8mm
8-12mm ≥95 ≤0.3 ≤1.5 ≤3.0
25-0mm
10-0mm
50-0mm
30-0mm ≥95 ≤0.3 ≤1.5 ≤3.0
Fine powder 180#-0
200#-0
320#-0 ≥94.5 ≥93.5 ≤0.5 ≤1.5 ≤3.5
Note: F is the specification for bonded abrasives and sandblasting
P is the specification for coated abrasives
W is micro powder, 320# is W40

Physical properties of brown corundum:
Project Indicator
Color dark brown (dark blue after calcination)
Crystal form Trigonal system
Hardness (Mohs) ≥9.0
Melting point (℃) 2250
Maximum operating temperature (℃) 1900
True density (g/cm3) ≥3.90
Linear expansion coefficient (01600℃) 79
Model
Grit No. Bulk Density
Bluck density model
Grit No. Bulk Density
Bluck density model
Grit No. Bulk Density
Bluck density
F12 2.02-2.10 F40 1.81-1.89 F120 1.61-1.69
F14 2.00-2.08 F46 1.79-1.87 F150 1.59-1.67
F16 1.97-2.05 F54 1.77-1.85 F180 1.57-1.67
F20 1.94-2.02 F60 1.76-1.84 F220 1.55-1.63
F22 1.92-2.00 F70 1.75-1.83
F24 1.90-1.98 F80 1.73-1.81
F30 1.88-1.96 F90 1.71-1.79
F36 1.87-1.95 F100 1.64-1.72