Fluorspar Lumps

Fluorspar Lumps from Pakistan

Fluorspar (fluorite) is a calcium fluoride mineral (CaF₂) that occurs in hydrothermal vein and replacement-type deposits. It is the world’s only significant commercial source of fluorine. Pakistani fluorspar deposits produce ore in a range of natural colors including pale green, purple, white, amber-brown, and colourless, reflecting variations in trace element content. The ore is mined, sorted, and sized into lump grades covering the full spectrum of industrial specifications from ceramic-grade through metallurgical-grade to acid-grade.

Specifications

• Mineral: Fluorite (CaF₂)

• CaF₂ Content: 50-97% (grade-dependent)

• SiO₂: 0.5-20% (grade-dependent)

• CaCO₃: 0.5-10% (grade-dependent)

• S: < 0.1%

• P: < 0.05%

• Fe₂O₃: 0.2-3%

• Moisture: < 3%

• Hardness (Mohs): 4

• Specific Gravity: 3.1-3.2

• Colours: Pale green, purple, white, amber-brown, colourless

Available Grades

• Ceramic-grade: 85-96% CaF₂ (for glass, enamel, and ceramic flux)

• Metallurgical-grade: 60-85% CaF₂ (for steelmaking, foundry, and ferro-alloy flux)

• Acid-grade: 97%+ CaF₂ (for hydrofluoric acid and fluorochemical production)

• Run-of-mine: 50-70% CaF₂ (for beneficiation or direct use in cement)

Available Sizes

• Run-of-mine lumps: 10-250 mm

• Crushed lumps: 10-80 mm, 10-50 mm

• Screened gravel: 5-25 mm, 10-30 mm

• Hand-sorted lumps: 20-150 mm (highest CaF₂)

• Custom sizing available

Industrial Uses

• Steelmaking flux: Fluorspar lumps are charged into BOF, EAF, and ladle refining furnaces to improve slag fluidity, promote desulphurization, and assist dephosphorization. The most widely used flux in primary and secondary steelmaking

• Hydrofluoric acid (HF) production: Acid-grade fluorspar lumps are reacted with sulphuric acid to produce HF, the starting material for all fluorine-based chemicals, refrigerants, fluoropolymers, and aluminium smelting chemicals

• Iron foundry flux: Charged into cupola and induction furnaces to improve slag fluidity and separation of non-metallic inclusions from molten iron

• Ferro-alloy production: Flux in submerged arc furnaces producing ferromanganese, ferrochrome, ferrosilicon, and other alloys

• Ceramic and enamel flux: Ceramic-grade fluorspar is used as a flux in ceramic bodies, glazes, and vitreous enamel, lowering firing temperatures and improving surface quality

• Glass manufacturing: Fluorspar is added to glass batches as a flux and opacifier, producing opal glass and specialty optical glass

• Cement manufacturing: Fluorspar at 0.5-1% in cement raw mix acts as a mineralizer, reducing clinker burning temperature and kiln fuel consumption

• Welding consumables: Fluorspar is used in welding rod coatings and submerged arc welding flux formulations

• Non-ferrous smelting: Flux in copper, lead, zinc, and aluminium smelting operations

Quality Assurance

Each lot includes a Certificate of Analysis reporting CaF₂, SiO₂, CaCO₃, S, P, Fe₂O₃, moisture, and size distribution. Grade-specific impurity limits are verified before shipment. Pre-shipment samples are provided for buyer approval. Third-party inspection (SGS, Intertek, or equivalent) can be arranged on request.