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Calcined Bauxite

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Calcined Bauxite Specification

Usage & Applications
Refractory bricks, Castables, Abrasives, Road surfacing

Purity(%)
80% - 90%

Density
3.15 Gram per cubic centimeter(g/cm3)

Chemical Composition
AL2O3: 80% - 87%, Fe2O3: 2% - 4%, SiO2: 4% - 6%, TiO2: 3% - 4%

Hardness (%)
8 Mohs

Form
Powder, Granules, Lumps

Melting Point
1780C - 1820C

Surface Finish
Rough, Granular

Water Absorption
<1%

Application
Refractories, Abrasives, Blast Furnaces, Steel, Cement, and Glass Industries

Product Type
Calcined Bauxite

Types of Refractories
High Alumina Refractory

Shape
Lumps, Powder, Granules

Porosity
Low to Medium

Dimensional Stability
Stable at high temperature

Strength
High mechanical strength

Specific Gravity
3.25 - 3.45

Thermal Conductivity
Low

Color
Brown, Grey, Reddish Brown

Bulk Density
2.4 - 3.1 g/cm³

Loss on Ignition (LOI)
<0.8%

Refractoriness Under Load (RUL)
>1500°C

Supply Ability
5000 Tons Per Month

Size
0-1mm, 1-3mm, 3-5mm, 10-50mm (custom available)

Alumina Content
80-87%

Packaging
25kg/50kg bags, 1 MT jumbo bags, or as required

Moisture
<0.5%

About Calcined Bauxite

Calcined bauxite is a chemical compound that is used known for its high mechanical strength. The bauxite is an ideal material that is used in the refractory production. The chemical has high friction properties. Its strength and durability are worth considering. It is used as an effective raw material. The calcined bauxite is also used for making abrasives. This raw material plays an important role in the industrial sector. We supply high quality raw material.

Technical Specification :

Shaft Kiln Bauxite

Items	AI₂O₃	Fe₂O₃	B.D.
86	86% min	2% max	2.9-3.15
85	85% min	2% max	2.8-3.10
84	84% min	2% max	2.8-3.10
83	83% min	2% max	2.8-3.10
82	82% min	2% max	2.8-3.0
80	80% min	2% max	2.7-3.0
78	78% min	2% max	2.7-2.9
75	75% min	2% max	2.6-2.8
70	70% min	2% max	2.6-2.8
50	50% min	2% max	2.5-2.55

Rotary Kiln Bauxite

Items	AI₂O₃	Fe₂O₃	B.D.	K₂o+Na₂o	CaO+MgO	TiO₂
88	86% min	1.5% max	3.25 min	0.25% max	0.4% max	3.8% max
87	87% min	1.6% max	3.20 min	0.25% max	0.4% max	3.8% max
86	86% min	1.8% max	3.15 min	0.3% max	0.5% max	4 % max
85	85% min	2.0% max	3.10 min	0.3% max	0.5% max	4 % max
83	83% min	2.0% max	3.05 min	0.3% max	0.5% max	4 % max
80	80% min	2.0% max	3.0 min	0.3% max	0.5% max	4 % max
78	75-78%	2.0% max	2.8-2.9	0.3% max	0.5% max	4 % max

Round Kiln Bauxite

Items	AI₂O₃	Fe₂O₃	B.D.	K₂o+Na₂o	CaO+MgO	TiO₂
90	90% min	1.8% max	3.4 min	0.3% max	0.5% max	3.8% max
89	89% min	2.0% max	3.8 min	0.3% max	0.5% max	4 % max
88	88% min	2.0% max	3.35 min	0.3% max	0.5% max	4 % max
87	87% min	2.0% max	3.30 min	0.3% max	0.5% max	4 % max
86	86% min	2.0% max	3.25 min	0.3% max	0.5% max	4 % max
85	85% min	2.0% max	3.20 min	0.3% max	0.5% max	4 % max
83	83% min	2.0% max	3.15 min	0.3% max	0.5% max	4 % max

Mullite

Items	AI₂O₃	Fe₂O₃	B.D.
M47	47% min	1.2 % max	2.55 min
M60	60% min	1.35% max	2.7 min
M70	70% min	1.6% max	2.75 min
M80	80% min	1.8% max	2.9 min

Calcined Kaolin

Items	AI₂O₃	Fe₂O₃	B.D.
47	47 % min	0.8-1% max	2.55 min
47	47 % min	1-1.2% max	2.55 min
47	47 % min	1.5% max	2.55 min
45	45 % min	1.5% max	2.5 min
44	44 % min	1.5% max	2.45 min
40	40 % min	0.8% max	2.35 min

Calcined Kaolin

Items	AI₂O₃	Fe₂O₃	B.D.
75	75 % min	2% max	2.65 min
70	70% min	2% max	2.6 min
60	60 % min	2.5% max	2.55 min
50	50% min	2.5% max	2.45 min
40	40% min	2.5% max	2.4 min

Superior Thermal Stability for Industrial Applications

Calcined Bauxite stands out for its ability to withstand high temperatures, making it essential in the manufacture of refractories, blast furnaces, and kiln linings. Its refractoriness under load exceeds 1500C, ensuring long-lasting durability and reliability even in intensive thermal environments.

Diverse Sizing and Custom Packaging Solutions

Available in sizes ranging from 0-1mm to 10-50mm, and forms such as powder, lumps, or granules, Calcined Bauxite offers flexibility for various industrial needs. Packaging options include 25kg/50kg bags, 1 MT jumbo bags, or tailored solutions to streamline logistics for domestic and international clients.

Consistency and High Purity

With a controlled chemical composition and alumina purity between 80% and 90%, Calcined Bauxite delivers consistent quality for use in abrasives, steel, cement, and glass industries. Its low water absorption (<1%) and high hardness (8 Mohs) further enhance its suitability for tough operational demands.

FAQs of Calcined Bauxite:

Q: How is Calcined Bauxite utilized in refractory applications?

A: Calcined Bauxite is widely used in refractory bricks and castables due to its high alumina content, dimensional stability, and ability to withstand temperatures above 1500C, extending the lifespan of lining materials in furnaces and kilns.

Q: What are the main benefits of using Calcined Bauxite in abrasives manufacturing?

A: Its high mechanical strength, low porosity, and hardness (8 Mohs) make Calcined Bauxite ideal for abrasives, providing excellent durability and efficiency in grinding, cutting, and polishing processes.

Q: When should industries opt for different sizes or forms of Calcined Bauxite?

A: Specific sizes and forms are chosen based on application requirements. Fine powders suit castable mixes, while larger lumps or granules are preferred for abrasive media and road surfacing. Custom sizing enhances performance and compatibility in each use case.

Q: Where is Calcined Bauxite sourced and exported from?

A: The product is supplied by exporters, importers, and suppliers based in India, with supply capabilities reaching up to 5000 tons per month, catering to worldwide industrial demands.

Q: What is the process involved in producing Calcined Bauxite?

A: Naturally occurring bauxite is processed by high-temperature calcination, which removes moisture and volatile components, increasing alumina concentration and improving its thermal and mechanical properties.

Q: How does low thermal conductivity benefit industrial users of Calcined Bauxite?

A: Low thermal conductivity helps minimize heat loss in furnaces and kilns, improving energy efficiency and operational safety for industries such as steel, glass, and cement.

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