Fluorite[2]
Overview
Fluorite, or calcium fluoride (CaF₂), is a naturally occurring mineral prized for its vibrant colors and industrial utility. It forms in hydrothermal veins and is often associated with metallic ores. The name 'fluorite' derives from its use as a flux in metallurgy, while 'fluorspar' refers to its industrial-grade forms. Fluorite exhibits fluorescence under UV light, a property that gave the phenomenon its name. It is also the primary source of fluorine for hydrofluoric acid (HF) production, a critical chemical in many industrial processes.
Physical and Chemical Properties
Fluorite crystallizes in the cubic system, often forming octahedral or cubic crystals. Its hardness is 4 on the Mohs scale, making it relatively soft compared to other minerals. The mineral’s color varies due to impurities, with purple, green, and yellow being the most common. Chemically, fluorite is stable under normal conditions but decomposes when heated above 1400°C or treated with strong acids, releasing hydrogen fluoride (HF). Its low refractive index and high transparency to infrared and ultraviolet light make it valuable for optical applications.
Main Applications
In metallurgy, fluorite serves as a flux to lower the melting point of raw materials in steel and aluminum production. It is also the primary feedstock for hydrofluoric acid (HF), used in refrigerants, pharmaceuticals, and fluorocarbon polymers. Optical-grade fluorite is used in lenses, prisms, and windows for telescopes and cameras due to its low dispersion. Additionally, it is carved into decorative objects and jewelry, though its softness limits durability.
Safety and Storage
Fluorite poses moderate health risks if inhaled as dust or exposed to HF gas during processing. Proper ventilation and personal protective equipment (PPE) are essential. Storage requires dry conditions to prevent moisture absorption, which can affect its performance in industrial applications. Waste containing fluorite should be disposed of in accordance with local regulations, particularly to prevent groundwater contamination from fluoride ions.
B2B Procurement Guide
Industrial buyers should prioritize purity (typically 85-99% CaF₂) and particle size, which varies by application (e.g., lump fluorite for metallurgy, powdered for chemical use). Prices fluctuate based on global supply and demand, with China being a major producer. Long-term contracts are advisable to mitigate price volatility. Verify supplier certifications and request material safety data sheets (MSDS) for compliance with safety standards.
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