Bauxite

 

Introduction

Calcined bauxite is one of the principal ore of aluminum. Calcined bauxite contains hydrous aluminum oxides and aluminum hydroxides, formed through the laterization of aluminous rocks in tropical and subtropical areas .calcined bauxite is obtained by calcining (heating)superior grade bauxite at high temperature (from 85OC to 1600C) .this removes moisture thereby increasing the alumina content. compared to an alumina content of about 57%to 58%in raw bauxite, calcined bauxite has an alumina content of 84%to88%.the heating is carried out in rotary kilns

 

1.Applications

Raw bauxite is typically classified according to its intended commercial application,such as abrasive ,cement ,chemical, metallurgical, and refractory .as raw material for use in high alumina and super duty refractory bricks and shapes ,plastics ,castable refractory, motors, gun mixes, ramming mixes, abrasive grains and other products.

 

2.specifications

Item	Al2O3	Fe2O3	TiO2	K2O+Na2O	CaO+MgO	Bulk density
GAL65	≥65	≤2.5	≤4.0	≤0.3	≤0.5	≥2.6
GAL75	≥75	≤2.5	≤4.0	≤0.3	≤0.5	≥2.7
GAL80	≥80	≤2.5	≤4.0	≤0.3	≤0.5	≥2.8
GAL85	≥85	≤2	≤4.0	≤0.3	≤0.5	≥3.0
GAL86	≥86	≤2	≤4.0	≤0.3	≤0.5	≥3.1
GAL87	≥87	≤2	≤4.0	≤0.3	≤0.5	≥3.2
GAL88	≥88	≤1.8	≤4.0	≤0.25	≤0.5	≥3.25
GAL90	≥90	≤1.8	≤4.0	≤0.25	≤0.5	≥3.25

 

3.Product photoes