Key Technical Points for Industrial-Grade Fluorite Powder Production

Fluorite (calcium fluoride, CaF₂) is a critical raw material in metallurgy, chemicals, and construction industries. The quality of fluorite powder directly impacts downstream product performance. Industrial-grade fluorite powder requires strict control over purity, fineness, and whiteness. Below are the key technologies and optimization strategies:

1. Multi-Stage Crushing & Ultrafine Grinding

Conventional crushing methods may damage fluorite’s crystal structure, reducing reactivity. Optimized solutions:

• Step-by-step crushing: Jaw crusher (coarse) → Cone crusher (medium) →MTW Grinding mill machines/ LIMING HEAVY INDUSTRY Vertical mill (fine), minimizing over-grinding.

• Cryogenic grinding (-196°C liquid nitrogen) prevents thermal decomposition, ensuring high purity (≥99.9%).

2. AI-Powered Dynamic Classification

Traditional classifiers often result in inconsistent particle sizes. Optimization measures:

• Laser particle analyzer + AI real-time adjustment ensures stable fineness (D50 ≤10μm).

• Closed-loop recycling: Oversized particles are automatically reground, boosting yield to 99.6%.

3. Inert Gas Protection System

Fluorite powder oxidizes and absorbs moisture easily, reducing whiteness. Solutions:

• Argon/nitrogen shielding from crushing to packaging, eliminating O₂/H₂O contact.

• Vacuum sealing extends shelf life to ≥12 months, maintaining whiteness ≥94%.

4. Advanced Quality Control

• Imported XRF analyzers (e.g., Shimadzu) guarantee low heavy metal content.

• SGS certification provided for each batch, meeting EU/US standards.

FAQ (Frequently Asked Questions)

Q1: What is the typical fineness requirement for industrial fluorite powder?
A: Generally D97 ≤45μm (325 mesh); high-end applications (e.g., fluorine chemicals) require D50 ≤5μm.

Q2: Why is inert gas necessary in fluorite grinding?
A: Fluorite reacts with moisture/O₂, forming CaO or clumps. Inert gases prevent degradation.

Q3: How to evaluate fluorite powder quality?
A: Key metrics: ① CaF₂ content ≥97%; ② Whiteness ≥90%; ③ Heavy metals (Pb, As) within limits.

Q4: Can Raymond mills produce high-purity fluorite powder?
A: Not recommended—high temperatures (>80°C) cause decomposition. Use jet mills or cryogenic grinding.