3-5mm Calcined Bauxite for Refractory Industry

• Customization: Available
• After-sales Service: Good and Fast
• Color: Grey
• Model NO.: Calcined Bauxite
• Application: Refractory
• Sample: Available
• Delivery Time: 3-15days
• Bulk Density: ≥2.45
• Water Absorption: 3max
• Transport Package: 25kg
• Specification: 25kg
• Origin: China
• HS Code: 2508600000
• Production Capacity: 6000tons/Year

Product Description

Refractory Sintered Calcined Bauxite 

Calcined Bauxite is produced by sintered high-alumina bauxite in rotary at high temperatures. This process of calcining (heating) bauxite in kilns removes moisture and gives Calcined Bauxite its high alumina content and refractoriness, low iron, and grain hardness and toughness. Its thermal stability, high mechanical strength and resistance to molten slags make Calcined Bauxite an ideal raw material in the production of many refractory, abrasive and specialty product applications.

Specification

Applications

Refractory products. The refractoriness of high alumina bauxite clinker is as high as 1780ºC, with strong chemical stability and good physical properties.
Aluminum silicate refractory fiber. It has the advantages of light weight, high temperature resistance, good thermal stability, low thermal conductivity, small heat capacity, and resistance to mechanical vibration. Used in steel, non-ferrous metallurgy, electronics, and other industries.
The high-alumina clinker is put into a high-temperature electric arc furnace with a melting temperature of about 2000-2200 ° C, and after high-temperature melting, high-pressure high-speed air or steam injection, and cooling, it becomes white "cotton" - aluminum silicate refractory fiber. It can be pressed into fiber blanket, board or woven into cloth to replace refractory bricks lining high temperature furnaces in smelting, chemical, glass and other industries. Firefighters can make clothes from fire-resistant fiber cloth.

Technical Specifications

(Custom configurations available upon request.)

Specifications	M75	M70	M60	M45
Granularity	0-1mm,1-3mm,3-5mm,5-8mm,0-325#
Al2O3 content (%)	74-78	69-73	58-62	42-47
SiO2 content (%)	24-25	22-25	35-38	49-52
Fe2O3 content (%)	≤0.3	≤1.0	≤1.0	≤0.8
Na2O content (%)	≤0.25	≤0.30	≤0.4	≤0.5
TiO2 content (%)	≤1.5	≤2	≤2.5	≤2.6
MgO content (%)	≤0.1	≤0.2	≤0.2	≤0.3
K2O content (%)	≤0.1	≤0.2	≤0.3	≤0.5
Bulk density (g/cm3)	≥2.85	≥2.75	≥2.65	≥2.45
Water absorption rate (%)	≤0.5	≤3	≤3	≤2
Mullite phase (%)	90-95	85-90	70-80	55-65
Fire resistance (ºC)	1800	1800	1800	1780
Linear expansion coefficient (20-1000 ºC)	5.3×10-6
Visible porosity (%)	≤6	≤8	≤9	≤10

Packing & Delivery

After Sales Service

Standard Warranty: 12 months or 2,000 operating hours (whichever comes first).
Extended Warranty: Optional coverage up to 36 months.
Global Support: 24/7 technical assistance and spare parts supply.
Training: On-site or remote operation/maintenance training.

FAQ

What is your MOQ?
One full container (25-28tons). More quantity you required , better price we can offer for you.

What is the leading time?
That depends on order quantity.  Generally it takes 10-15 days for one full container. 

How can I get samples to check the quality?
We can provide the samples free for you, but the express cost will be on your account. 

What is your payment term?
50% T/T in advance, and balance payment at sight copy of BL. 
Letter of credit is also available.