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Click to add WeChatMica is a general term for hydrated aluminosilicate minerals with a layered structure containing potassium, magnesium, iron, lithium and other elements. It mainly includes muscovite, sericite, biotite, phlogopite, lepidolite, etc., which can be obtained through Mineral processing improves the grade and quality of mica. Depending on the properties of the ores contained in mica, the beneficiation methods include hand selection, friction beneficiation, shape beneficiation, and flotation >, Reselection and Wind selection method etc. Among them, flotation method is more common. The following editor will introduce the mica flotation method, which mica ore is suitable for flotation and mica flotation process.
Flotation mica is generally based on the surface characteristics of mica ore and gangue minerals. Select based on differences in physical and chemical properties. There are several types of mica mines including large pieces of muscovite, crushed mica and sericite, all of which can be purified by flotation. In addition to recovering mica as a useful mineral, mica is a common gangue mineral in many ores and needs to be removed by flotation.
During flotation, the raw ore is broken and ground to dissociate from the gangue mineral monomer. With the blessing of chemicals, it is solidified. -In the liquid-gas three-phase interface, mica is selectively enriched (making mica a foam product), thereby completing the separation of mica and gangue. Common mica flotation methods include acidic cation flotation, alkaline anion-cation flotation and the two combined flotation methods.
The acidic cation flotation method is mostly suitable for selecting coarse-grained mica, and the upper limit of the recyclable particle size is 14 Because of its relatively coarse particle size, pre-sliming operations need to be carried out before flotation, using Vibrating screen performs desliming treatment, and then uses sulfuric acid as a pH adjuster (solid concentration 40~45%) to suppress quartz. When the pH value is 4, the flotation effect is better.
When there is a certain amount of slime in the mica and the mica particles are 20 mesh or above, alkaline flotation is used Anion-cation flotation has better effect. Similarly, sticky minerals need to be removed before flotation. During flotation, sodium carbonate and calcium lignosulfonate can be used as pulp inhibitors. Calcium carbonate also serves as a pH adjuster. Calcium lignosulfonate also functions as a pulp dispersant. At pH 8.0~10.5, the recycling effect of mica is better.
Generally, the mica flotation process is determined based on the mineral processing method. Due to the different properties of mica ore, during flotation , it is necessary to go through the processes of multi-stage rough selection, multi-stage selection and sweeping to obtain a more ideal mica concentrate.
The following takes three paragraphs of rough selection and three paragraphs of selection as examples to introduce the process. In this process, three sets of XCF type flotation machines are used for each rough separation and selection. Among them, the mica rough separation tailings directly enter the tailings. System, the rough concentrate flows to the third stage of beneficiation operation to continue flotation. After beneficiation, the mica enters the dehydration system, and the beneficiation tailings also enter the tailings system.
The above is an introduction to mica flotation. In actual production applications, it is necessary to determine the preliminary process flow based on the properties and characteristics of mica ore, and to enrich and enrich the process through a series of condition tests. Optimize to obtain ideal mica concentrate.
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