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  • A Brief Introduction to Fluorite A Brief Introduction to Fluorite May 28, 2024
    Fluorite ore, also known as fluorite or soft crystal, its main component is calcium fluoride (CaF₂), which emits fascinating fluorescence under ultraviolet or cathode ray irradiation. The crystals of fluorite are usually larger, have a glassy luster, and have bright and varied colors, which makes it unique in the field of decoration and collection. However, due to the low hardness and brittleness of fluorite, we need to avoid violent collisions and contact with the chemical fluorite mineral in daily contact. It is also called fluorite or soft crystal. Its main component is calcium fluoride (CaF₂) , which emits fascinating fluorescence under ultraviolet or cathode ray irradiation. The crystals of fluorite are usually larger, have a glassy luster, and have bright and varied colors, which makes it unique in the field of decoration and collection. However, due to the low hardness and brittleness of fluorite, we need to avoid violent collisions and exposure to chemicals in daily contact. In the industrial field, fluorite is the main source of fluorine and is widely used in metallurgy, chemical industry, building materials and other fields. In addition, fluorite also has good optical properties and can be used to make optical products such as glasses and lenses. In short, fluorite mine not only has unique aesthetic value, but also plays an important role in industry, scientific research and other fields. This article will take you through the main types of fluorspar and their mineral processing methods. The main types of fluorite ore can be divided according to their gangue minerals. Specifically, fluorite ore can be divided into the following types: Single type fluorite: Single-type fluorite ore is mainly composed of fluorite, with smaller amounts of other gangue minerals, such as barite, potassium feldspar, calcite, pyrite, adolite, kaolinite, etc., as well as trace amounts of phosphate-containing minerals and metal sulfides. Specifically, the grade of calcium fluoride is generally 35%-40%. A few fluorspar with more than 65% can be directly used as smelting-grade fluorspar resources, but the reserves are small and the degree of development is high. Sorting process: Hand selection is mainly used for fluorite ores where the boundaries between fluorite and gangue are very clear, and is carried out through steps such as washing, screening, and manual separation. Photoelectric separation is mainly used to sort granular ores with higher grade ores and particle sizes of 5 to 80 mm. Quartz type fluorspar ore: The main minerals are fluorite and quartz. The content of fluorite can be as high as 80% to 90%, and also contains a small amount of calcite, barite and sulfide. Since its main gangue mineral is quartz, its mineral composition is relatively simple and its purity is high. It can be used in industrial production directly or after simple treatment. Sorting process: The processing process of quartz fluorite is relatively simple and can be directly subjected to physical processing such as crushing, photoelectric sorting, and grinding. Carbonate fluorspar ore: The main minerals are fluorite and calcite, of which the calcite content can reach more than 30% and contains a small amount of quartz. Sometimes the mineral composition of such ores can be further subdivided into the quartz-calcite-fluorite type. Sorting process: Carbonate fluorspar ore has certain limitations in industrial applications. Since both fluorite and calcite in carbonate fluorspar ores have good floatability during the flotation process, conventional flotation processes and chemical systems cannot effectively distinguish between the two, resulting in calcium carbonate ( The CaCO₃) content exceeds the standard and becomes a non-standard product. Therefore, carbonate fluorspar ore is called "difficult to separate ore" by the fluorite mineral processing industry. At present, some carbonate fluorspar ores with good dissociation degree in the particle ore stage are processed by Mingde artificial intelligence sorting equipment. Pre-selecting and discarding waste to reduce the calcium carbonate content, and finally recovering the fluorspar concentrate through flotation. Barite type fluorspar ore: The main minerals are barite and fluorite, with the content of barite ranging from 10% to 40%. This type of ore is often accompanied by sulfides such as pyrite, galena, sphalerite, etc. Sometimes the quartz content also increases, forming a quartz-barite-fluorite type ore. Sorting process: After the barite type fluorspar ore is crushed, for coarse-grained ores, heavy media beneficiation methods are commonly used, such as jig beneficiation or shaking table beneficiation. When the selected fluorspar ore contains heavy metal minerals such as barite and galena, the fluorspar will be recovered as the first heavy material. For fine-grained ores, flotation is often used for separation. During the flotation process, the mixed flotation process and Na2CO3 are used to adjust the pH of the slurry, and the pharmaceutical system uses oleic acid and water glass as collectors and inhibitors respectively to obtain a mixed concentrate of fluorite and barite. The barite and fluorite are then separated by flotation. Sulfide ore type fluorspar ore: Its mineral composition is similar to quartz-fluorite, but it contains more metal sulfides, and sometimes the lead and zinc content can reach industrial grades. Sorting process: Flotation is generally used. First, a xanthate collector is used to float out the sulfide ore, and then a fatty acid collector is added to float the fluorspar. In order to suppress residual sulfide minerals and ensure the quality of fluorspar concentrate, a small amount of sulfide mineral inhibitors, such as cyanide, can be added. The selected fluorspar concentrate is dehydrated and dried to obtain the final fluorspar product. Siliceous rock type fluorite: Siliceous rock type fluorite is formed by sedimentation. This type of fluorite ore is usually distributed in shale, mica quartz and other siliceous rocks in the form of fine-grained disseminated, cement-like, strip-microlayered, lumpy, and oblate lens shapes. Sorting process: After the raw ore is crushed and screened, the coarse-grained ore is generally sorted by heavy media, and the fine-grained ore is sorted by a jig or shaker.  When the selected fluorite ore contains heavy metal minerals such as barite, sulfite, galena, etc., fluorite is recycled as the first heavy object. Sedimentary fluorite: As for carbonate fluorite among sedimentary fluorite, fluorite is distributed in fine granules in limestone and marble, and forms a granular co-bonding mosaic structure or metamorphic structure with calcite or dolomite. The mineral composition of sedimentary fluorspar deposits is relatively complex and may contain a variety of impurities and associated minerals, so more complex mineral processing and purification processes are required before industrial application. Sorting process: Due to the complexity of its mineral composition, sedimentary fluorite may need to adopt more complex processes and technologies during processing, such as flotation, gravity separation, etc. Generally speaking, the sorting process of fluorspar ore may vary depending on the nature of the ore, the performance of the beneficiation equipment and the beneficiation objectives.  Therefore, in practical applications, appropriate sorting processes and methods need to be selected according to specific circumstances,equipment, and at the same time make appropriate adjustments and optimizations to the process flow to achieve the best mineral processing effect.

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