Bauxite Product Introduction

Also known as alumina ore or bauxite ore, its main component is alumina (Al₂O₃). It is a hydrated alumina mineral containing impurities, presenting as an earthy mineral. Depending on iron content, it appears white, off‑white, brownish‑yellow, or light red. It is the optimal raw material for primary aluminum production (accounting for over 90% of global bauxite output) and is widely used in refractory materials, abrasives, chemical products, high‑alumina cement, and other industries.

Our bauxite products are sourced from high‑quality ore deposits, available in two major series: raw bauxite and calcined bauxite. Among them, high‑alumina calcined bauxite is processed via high‑temperature calcination at 1400℃–1700℃, featuring a dense structure, stable physical and chemical properties, and a refractoriness above 1780℃. Products are strictly graded according to Al₂O₃ content and impurity indexes to meet diverse industrial requirements.

Core Value of Bauxite

From aluminum alloys for national defense and aerospace, to furnace linings in iron and steel smelting, and mold materials for precision casting, bauxite is a key non‑metallic mineral supporting modern high‑temperature industries and basic material sectors.

Part 2: Core Advantages & Characteristics

High Alumina Content & Graded Quality

Al₂O₃ content ranges from 50% to over 90%, with low‑, medium‑, and high‑grade products. High‑alumina bauxite (Al₂O₃ ≥85%) features high bulk density and low impurities, making it ideal for high‑end refractory materials.

Excellent Refractory Performance

High‑alumina calcined bauxite has a refractoriness above 1780℃, strong chemical stability, and good physical properties, capable of withstanding severe high‑temperature furnace conditions.

High‑Temperature Calcination & Dimensional Stability

Fully sintered in rotary or shaft kilns, the product has high bulk density (≥3.25 g/cm³), low water absorption (≤3.0%), and outstanding thermal shock resistance and dimensional stability at high temperatures.

Controlled Impurities & Stable Composition

Beneficiation and homogenization processes strictly control harmful impurities such as Fe₂O₃, TiO₂, K₂O+Na₂O, ensuring stable chemical composition to meet formulation requirements across applications.

Diverse Particle Sizes & Complete Specifications

Aggregates: 0–1mm, 1–3mm, 3–5mm, 5–8mm, 8–15mm. Powders: 100 mesh, 200 mesh, 325 mesh, 600 mesh, 800 mesh. Suitable for refractory castables, ramming mixes, precast blocks, coatings, and more.

Part 3: Main Product Classification

Product Type	Form	Al₂O₃ Content	Key Features	Main Applications
Raw Bauxite	Run‑of‑mine / Lumps	50–75%	Contains crystal water, high loss on ignition	Aluminum production, light‑burned material, PAC
High‑Alumina Calcined Bauxite	Aggregate / Powder	≥80–90%	Calcined at high temp, dimensionally stable	Refractory products, castables, ramming mixes
Bauxite Aggregate	0–1 / 1–3 / 3–5 / 5–8 / 8–15 mm	≥85%	Reasonable gradation, high strength	Refractory castables, ladle materials, precasts
Bauxite Fine Powder	100–800 mesh	≥85–86%	Fine particle size, good dispersibility	Foundry coatings, ceramics, wear‑resistant materials
Homogenized Bauxite	Aggregate / Powder	≥85%	Uniform composition, stable performance	High‑alumina bricks, advanced refractories

Part 4: Main Application Fields

Bauxite applications fall into metallurgical and non‑metallurgical categories. Although non‑metallurgical uses account for a smaller share, they cover an extremely wide range of industries.

1. Aluminum Industry (Core Application, >90%)

Bauxite is the optimum raw material for metallic aluminum production. Over 90% of global bauxite is used here. Alumina is extracted via the Bayer or sintering process, then electrolyzed into metallic aluminum. Aluminum alloys and products are widely used in:

Defense & Aerospace

Aircraft structural parts, spacecraft components.

Automotive

Lightweight bodies, engine parts.

Electrical & Chemical

Cables, heat exchangers, chemical vessels.

Daily Life

Doors/windows, packaging, electronic housings.

2. Refractory Industry (Core Non‑Metallurgical Use)

High‑alumina calcined bauxite is a critical refractory raw material with refractoriness up to 1780℃ and strong chemical stability. Main refractory products:

High‑alumina bricks

Blast furnaces, hot blast stoves, EAF roofs, cement rotary kilns.

Refractory castables

Ladles, tundishes, monolithic furnace linings.

Monolithic refractories

Gunning mixes, ramming mixes, plastics.

Ladle castables

Magnesia and bauxite clinker for ladle linings.

3. Precision Casting

Calcined bauxite powder is used to produce precision casting molds for:

• Military & Aerospace: Complex structural components.

• Communications & Instruments: High‑precision metal parts.

• Machinery & Medical Devices: High‑temperature, corrosion‑resistant parts.

4. Chemical & Environmental Protection

Bauxite is used to produce various aluminum compounds:

• Polyaluminum chloride (PAC): Raw material for water treatment.

• Aluminum sulfate, aluminum chloride: Paper sizing, water treatment flocculants.

• Activated alumina: Catalysts, carriers, adsorbents for refining and pharma.

5. Abrasive Materials

High‑alumina bauxite is a key raw material for high‑grade abrasives:

• Brown fused alumina: Produced in electric arc furnaces for grinding wheels, abrasives, polishing powders.

• High‑performance grinding wheels: High hardness and wear resistance.

6. Ceramics & Glass Industry

• Ceramics: Improves whiteness, mechanical strength, and thermal stability.

• Glass: Adding 3%–5% Al₂O₃ enhances melting point, viscosity, strength, and chemical stability.

7. Other Applications

Foundry coatings

Lost‑foam and sand casting, improving surface finish.

Wear‑resistant materials

Ceramic wear parts, flooring.

Welding electrode fluxes

Strict requirements for Al₂O₃, Fe₂O₃, P, and S.

Part 5: Product Specifications & Technical Parameters

High‑Alumina Calcined Bauxite

Item	JYL‑16	JYL‑18	Testing Standard
Al₂O₃ (%)	50–80	50–80	GB/T 6900
Fe₂O₃ (%)	<0.8	<0.8	GB/T 6900
SiO₂ (%)	<4.0	<4.0	GB/T 6900
TiO₂ (%)	≤4.0	≤4.0	GB/T 6900
Bulk Density (g/cm³)	≥3.25	≥3.25	GB/T 2999
Refractoriness (℃)	≥1790	≥1790	GB/T 7322
Water Absorption (%)	≤3.0	≤3.0	GB/T 2999
325‑Mesh Residue (%)	<0.1	<0.15	-
Oil Absorption (ml/100g)	14±1	12±1	-
Mohs Hardness	≥9.0	≥8.5	-

Particle Size Specifications

Product Form	Specification	Main Applications
Bauxite Aggregate	0–1mm, 1–3mm, 3–5mm, 5–8mm, 8–15mm	Refractory castables, ramming mixes, precasts
Bauxite Fine Powder	100 mesh, 200 mesh, 325 mesh	Refractory mortars, foundry coatings, ceramics
Ultrafine Powder	600 mesh, 800 mesh	High‑grade coatings, wear materials, precision casting