In the non-metallurgical industry, bauxites with refractory grades have been applied as raw materials to produce high-alumina refractories for both shaped and unshaped. Nowadays, China has a 95% market share. Refractories are insulating materials that maintain their strength and chemical properties at high temperatures. They are used to line boilers, furnaces, kilns, reactors.
Refractory applications remain the premiere non-metal market for calcined bauxite, mixed with binders and pressed, extruded, cast, and shaped into a variety of forms that are then dried and transferred to kilns for firing. The calcined refractory grade bauxite is also used in unfired monolithic refractories. Another source of materials suitable for refractory use is the calcined bauxite used to produce brown fused alumina, which has higher mechanical and chemical corrosion resistance than another high alumina refractory raw materials.
Specification for Calcined Refractory Bauxite
| Colour: | light yellow/dark grey |
| Particle shape: | Angular |
| Bulk density: | min 3.35 g/cm3 |
| Moisture content: | max 0.3% |
Available Refractory Bauxite
| Item | CR90 | CR88 | CR87 | CR85 | CR80 |
| Al2O3(%) | 90.0min | 88.0min | 87.0min | 85.0min | 80.0min |
| SiO2(%) | 3.5max | 5.5max | 7.0max | 8.0max | 10.0max |
| Fe2O3(%) | 1.5max | 1.6max | 1.8max | 2.0max | 2.5max |
| TiO2(%) | 3.8max | 4.0max | 4.0max | 4.0max | 4.0max |
| CaO+MgO | 0.35max | 0.40max | 0.40max | 0.40max | 0.50max |
| K2O+Na2O | 0.35max | 0.40max | 0.40max | 0.40max | 0.50max |
| B.D(gm/cc) | 3.35min | 3.25min | 3.20min | 3.10min | 2.90min |
| Moisture | 0.3max | 0.3max | 0.3max | 0.4max | 0.5max |
Available Grain Size
0-1mm; 1-3mm; 3-5mm; 5-8mm; 16-30mesh; 30-60mesh; 120mesh; 200mesh; 325mesh or as customer’s requirement.
Package
1MT Jumbo bag
Standard exporting package for sea transportation or air delivery
Special packing requirement is acceptable
Daniel (verified owner) –
Very fast delivery.