Mica Processing is a process that changes the size and shape of the mineral to produce a product that meets the specification of the user. Generally, dry ground mica is used for most applications, while micronised mica is made by a jet air mill. However, in some cases, very fine particles are required for a particular application, such as the welding rods industry. If this is the case, further calcination steps may be required to remove a natural xuong mica loss of four to five percent during ignition.
The process starts by blasting the ore. After the blasting, the ore is placed in bags or boxes for transportation to the trimming shed. This step further reduces the size of the final product to the desired size. Typically, the final product is then screened and bagged. Mica Processing takes several steps to reach the desired size and shape. Here is an overview of some of the stages involved in the process:
In South America, mica workers are seriously abused by a floor price of four cents per kilogram. To improve the conditions of mica workers, it is essential to educate themselves on the bargaining power of mica miners and consider the middlemen in the supply chain. In some parts of South America, informal small-scale miners have successfully negotiated better pay through the formation of cooperatives and forming unions. The Mica Processing factory list helps these workers maximize their sourcing performance in the manufacturing and processing machinery industry.
In addition to mica flotation, an acid cationic method has been developed to recover coarse mica. Mica particles as coarse as fourteen mesh must be deslimed and thereby, resulting in considerable loss of fine mica. Acid cationic methods include conditioning ground ore pulps with sulfuric acid. Sulfuric acid helps in pH control and quartz depression. Mica flotation is optimal in a pH 4.0 pulp. Long-carbon-chain amine acetates were most effective collecting agents for floating mica.
A 2:1 layer of micas consists of octahedral sheets between two tetrahedra. Micas are categorized as dioctahedral or trioctahedral based on the number of cations in each octahedral position. Biotite has three octahedral positions filled, whereas muscovite has two octahedral cations filled. The negative charge of mica attracts charge-compensating interlayer cations.
After mineral separation, mica samples are placed in conical centrifuge tubes. The heavy liquid, which has a specific gravity of 2.68, is whirled around the samples. This process separates stratified mineral layers. The mica concentrations recovered by this process are approximately 87 percent. A final concentration of ninety-five percent mica is obtained through a combined flotation concentrate. This is a highly efficient process that allows for high-quality mica.
Mica processing is a process that is not without risk. For companies to make sure that they are not violating industry standards, transparency and mapping of the supply chain is essential. ELEVATE’s blogs are written by its associates and staff. Those blogs are the driving force behind the client relationship with ELEVATE. If you’d like to learn more about the Mica processing process, read our blogs! You can also visit ELEVATE’s website or sign up for our newsletter.