Overview
Green fluorite block, also known as fluorspar, is a naturally occurring mineral composed primarily of calcium fluoride (CaF2). It is characterized by its vibrant green color and cubic crystal structure. Fluorite is widely distributed across the globe, with significant deposits found in China, Mexico, and South Africa. The mineral is highly valued in industrial applications due to its fluxing properties and thermal stability. Fluorite is classified into three grades based on its purity: metallurgical grade (60-85% CaF2), ceramic grade (85-95% CaF2), and acid grade (97%+ CaF2). Green fluorite blocks are commonly used in metallurgical processes to lower the melting point of raw materials and improve slag fluidity. Its unique optical properties also make it suitable for manufacturing lenses and prisms.
Physical and Chemical Properties
Green fluorite block exhibits a Mohs hardness of 4, making it relatively soft compared to other minerals. Its density is 3.18 g/cm³, and it has a melting point of 1418°C. The mineral is insoluble in water but dissolves in acids, releasing hydrogen fluoride gas, which requires careful handling. Fluorite is known for its fluorescence under ultraviolet light, a property that varies depending on impurities. The crystal structure of fluorite is cubic, often forming well-defined octahedral or cubic crystals. Its color ranges from green to purple, yellow, or colorless, depending on trace elements. For example, green fluorite derives its hue from rare earth elements or radiation-induced color centers. The mineral is also transparent to translucent, with a vitreous luster.
Main Applications
Green fluorite block is primarily used in metallurgy as a flux to lower the melting temperature of raw materials and remove impurities. It is essential in steelmaking and aluminum production, where it improves slag fluidity and reduces energy consumption. In the glass industry, fluorite acts as a flux and opacifier, enhancing the clarity and durability of glass products. Another significant application is in the chemical industry, where high-purity acid-grade fluorite is used to produce hydrofluoric acid (HF). HF is a key raw material for manufacturing refrigerants, pharmaceuticals, and fluoropolymers like Teflon. Fluorite is also used in optical applications, such as lenses and prisms, due to its low dispersion and high transparency to infrared and ultraviolet light.
Safety and Storage
Green fluorite block is generally safe to handle but poses risks if inhaled as dust or exposed to acids. Prolonged exposure to fluorite dust can cause respiratory irritation, so workers should use protective masks and ensure proper ventilation. When fluorite reacts with acids, it releases hydrogen fluoride gas, which is highly toxic and corrosive. Storage conditions are critical to maintaining the quality of fluorite. It should be kept in a dry, cool place away from moisture and acidic substances. Bulk storage should be in sealed containers or covered piles to prevent contamination. Proper labeling and handling procedures are essential to minimize risks and ensure workplace safety.
B2B Procurement Guide
When sourcing green fluorite blocks, buyers should prioritize purity, particle size, and consistency. Metallurgical-grade fluorite typically contains 60-85% CaF2, while acid-grade requires 97%+ purity. Suppliers should provide certified assay reports to verify composition. Particle size is also critical, especially for fluxing applications, where finer grades may be preferred. Price negotiation is common in bulk purchases, with reference prices ranging from $200 to $500 per ton. Buyers should inquire about logistics options, including bulk shipping and packaging. Establishing long-term contracts with reliable suppliers can ensure stable supply and favorable terms. It is also advisable to assess suppliers' environmental and safety compliance to align with corporate sustainability goals.
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