Metallurgical Grade Fluorspar Metspar CaF2 80% Lumps 10-80mm for Steelmaking Flux

Product Overview
Metallurgical Grade Fluorspar is a naturally derived calcium fluoride-based flux. Unlike acidspar (CaF₂ ≥97%), which is driven by maximum purity, Metspar is designed around a different logic: achieving the required slag conditioning at the highest practical fluxing efficiency within acceptable impurity limits. The lump and granular forms allow easy charging into the furnace and rapid dissolution into the slag system, where CaF₂ interacts with CaO and SiO₂ to substantially reduce melting point and viscosity.

Key Advantages

• Efficient Fluxing: Lowers slag melting point and viscosity, improving fluidity and enabling more complete transfer of sulphur and phosphorus into the slag phase.

• Broad Grade Range: 70%–85%+ CaF₂ options suit different fluxing intensities, from cupola operations to EAF and BOF steelmaking.

• Lump Form with Controlled Fines: Mainstream sizes of 10–80mm, with a limited proportion of <10mm fines to reduce dusting and burn-off during charging.

• Wide Furnace Compatibility: Suitable for electric arc furnaces (EAF), basic oxygen furnaces (BOF), cupola furnaces, and ferroalloy/non-ferrous smelting.

Typical Applications

• Steelmaking Flux: The primary use of metallurgical grade fluorspar, reducing slag viscosity and promoting desulphurisation and dephosphorisation in EAF and BOF operations.

• Cast Iron & Ferroalloys: Improving slag fluidity in cupola and ferroalloy practice.

• Non-Ferrous Smelting: Used in the melting and refining of aluminium, copper, and other metals.

• Other Industries: Cement kiln fluxing, glass and fiberglass, enamels, and welding rod coatings.

Metallurgical grade fluorspar production is primarily physical beneficiation, with the core objectives of preserving lump form, controlling impurities, and achieving target sizing—rather than the chemical deep-purification associated with acidspar. The typical route is as follows:

1. Hand Sorting / Ore Sorting: After mining, high-grade fluorite ore is sorted manually or mechanically to reject obvious gangue and waste rock, providing cleaner feed for crushing.

2. Crushing: Jaw crushers and other equipment are used in one- or two-stage crushing to reduce the ore to a size suitable for screening. For lump-form product, the reduction ratio is controlled to avoid over-crushing and excessive fines generation.

3. Screening & Classification: Vibrating screens classify the crushed material into mainstream lump sizes such as 10–60mm and 10–80mm, while <10mm fines are separated to control the powder proportion in the finished product.

4. Washing (where required): Ores with high clay content are washed to remove surface clays and adhering impurities, improving effective CaF₂ grade.

5. Final Sorting: Screened lumps undergo a final manual or mechanical picking step to remove high-silica, high-iron, or off-colour particles, ensuring batch-to-batch grade consistency.

6. Packaging & Delivery: Typically packed in jumbo bags (1,000–1,250kg) and shipped under EXW, FOB, or CIF terms.

Note on fines/by-product streams: Fine fractions generated during fluorspar beneficiation can be briquetted and supplied as an alternative metallurgical-grade form—a practice the industry has increasingly adopted as lump ore availability tightens.