Raw Material for Ceramic Products Calcined Bauxite with Low Iron

• Refractoriness (℃): 1770< Refractoriness< 2000
• Feature: Long Time Materials
• Type: Refractory Material
• Shape: Powder
• Material: Alumina Block
• Competitive Price: High Purity
• Model NO.: CB
• Transport Package: Jumbo Bag
• Specification: SGS
• Trademark: TOPIC
• Origin: Henan, China
• HS Code: 2508300000
• Production Capacity: 3000mt/M

Product Description

Abrasive Grade Calcined Bauxite
Abrasive grade bauxite, the feedstock for brown fused alumina, is prepared from low silic, low alkali material that is alcined at temperatures of approximately 1100 C. The minimum alumina content of 80% on a calcined basis is normally required for this application. And the upper limit on the silica content is 5%. Titania is ideally in the range of 2% to 4%. And low concentrations of alkalies are a requisite in order to minimize the formation of a glass phase. Besides these strict chemical specifications, particle size is especially critical for abrasive production. The upper limit on particle size is 50mm with the lower threshold set at a 100 mesh screen size.
 
Application
Some calcined bauxite is used directly as an inexpensive abrasive product, but by far the largest amount is used as the feedstock for the manufacture of brown used alumina. Brown fused alumina is produced by the electrofusion of calcined bauxite in electric arc furnaces at temperatures in excess of 2000 ºC

 
Available grain size 
0-50mm or as customer's requirement. 
 
Package
Usually 1MT Jumbo bag
Standard exporting package for sea transportation or air delivery
Special packing requirement is acceptable
 
 

Item name	YZCBA-83	YZCBA-85	YZCBA-87
Al2O3	83.0%min	85.0%min	87.0%min
SiO2	7.5%-9.0%	5.6%-7.5%	3.0%-5.6%
Fe2O3	2.5%max	2.0%max	1.6%max
TiO2	4.2%max	4.0%max	3.6%max
CaO	0.8%max	0.6%max	0.5%max
Na2O+K2O	0.5%max	0.5%max	0.5%max
CaO+MgO	1.0%max	0.8%max	0.8%max
Moisture	0.05%max	0.04%max	0.03%max
LOI	0.5%max	0.4%max	0.4%max
Bulk density	2.70gm/cc	2.75gm/cc	2.80gm/cc