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Click to add WeChatIn recent years, fluorite has been used as an important raw material in the optical field, and more and more attention has been paid to its development and utilization. Due to the over-exploitation of conventional fluorite, resulting in a shortage of resources, now there is a need for complex multi-vein fluorite. The development and utilization of mines are gradually increasing. At present, the common complex multi-vein type fluorite minerals mainly include quartz-type fluorite, calcite-type fluorite, barite-type fluorite and sulfide-type fluorite. These minerals are mostly flotation methods. Then, this article will focus on introducing these complex multi-vein fluorite ore beneficiation methods.
Quartz-type fluorite is mainly composed of fluorite and quartz,fluorite content At about 85%it also contains a small amount of calcite, barite and sulfide, which is formed by condensation of ore-bearing hydrothermal fluid filling the cracks in siliceous rocks along the formation.
Reducing the silicon in the concentrate is the focus of this type of ore beneficiation. According to different use requirements, the requirements for silicon content are also different. In the mineral processing process, grinding is a factor that has a greater impact on the flotation of quartz-type fluorite ore. It is necessary to grind to separate the quartz and fluorite monomers . Since most quartz-type fluorspar ores contain conjoined bodies of quartz and fluorite, if the grinding particle size is too fine, the fluorite will be over-crushed and affect the recovery rate. Therefore, the stage grinding process is generally used, which not only reduces the The silicon content of the concentrate product after fluorite flotation can also increase the recovery rate of fluorite concentrate, using the process flow of stage grinding stage flotation and multiple selectionHigh-grade fluorspar concentrate can be obtained.
Calcite-type fluorite mainly contains fluorite and calcite, the calcite content is generally higher than 30%, and the ore contains a small amount Quartz, may form quartz-calcite-fluorite type ore. Since calcite and fluorite are both calcium-containing minerals with similar physical and chemical properties, it is difficult to separate them by flotation in the slurry.
The pH of the slurry will have a great impact on the flotation indicators. In the selection of flotation reagents, fatty acid collectors can make calcite and fluorescein If the stone floats together, the pH value of the slurry needs to be adjusted to adjust the flotability difference between the two. Generally, within the range of pH 8~9.5, both calcite and fluorite can float. However, in weakly acidic media, the floatability of calcite is lower than that of fluorite. In actual production, tests should be conducted to determine the appropriate chemical system and flotation conditions based on the specific ore properties.
Barite-type fluorite ore mainly contains barite and fluorite, of whichthe barite content is generally 10%~ Between 40%it also contains sulfide minerals such as pyrite, galena, and sphalerite. Barite has a similar floatability to fluorite, making separation of the two minerals difficult.
In the ore beneficiation process, the process of mixed flotation is generally first used to adjust the pH value of the slurry using sodium carbonate. Oleic acid and Waterglass serve as collector and inhibitor respectively to obtain a mixture of barite and fluorite. The concentrate, by flotation, suppressed barite or fluorspar, floats another mineral.
The mineral composition of sulfide-type fluorite is similar to quartz-type fluorite mineral, and compared with it, it has more The content of metal sulfides is high, and the content of lead, zinc and other elements can even reach industrial grade. Therefore, the comprehensive recovery of various elements needs to be considered during the development and utilization of this type of ore.
When sorting this type of ore, a sulfide ore collector is generally used to preferentially float out the metal sulfide minerals strong>, then use fatty acid collectors to sort the flotation tailings and recover the fluorite. In order to better extract valuable metals and decompose fluorite, processes such as roasting and leaching will also be added to the sorting method to recover valuable metals while preparing high-quality Fluorite products.
The above content is an introduction to several common complex fluorite ore beneficiation methods, targeting different types of fluorite ore. The mineral processing methods are different, so a suitable process plan should be selected according to the properties of the ore. The editor recommends that you first conduct a fluorite ore beneficiation test analysis and customize a suitable fluorite ore beneficiation plan based on the analysis results.
Xinhai Mining can provide users with Ore processing test analysis, Customization of mineral processing process plan, Complete set of mineral processing equipmentSupply and On-site installation and commissioning of mineral processing plant and Project operation management of mineral processing plantServices can guide and track the whole process, helping you quickly realize the operation of the mineral processing plant and obtain a better return on investment.
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