There are numerous mineral resources in India. According to survey, India had the largest deposits of mica in the world. Actually, India is one of the leading suppliers of mica to the world. India produces about 60% of the worlds total mica production. About 95% of Indias mica is distributed in just three states of Jharkhand, Andhra Pradesh and Rajasthan.
Mica has wide applications. Small quantity of mica mineral resource in India is also used for the production of mica powder and mica bricks. Mica powder is used in the production of rubber goods and paints. Mica bricks are used as insulating materials in steel and thermal power plants and petroleum refineries. Interestingly, the production of mica depends on foreign demand to a great extent. Huge amount of mica in India is exported. Countries such as United States, Japan and United Kingdom are the major buyers of mica.
There are more than 30 working mica mines in India and majority of them are located inAndhra Pradesh. All the mica mines were extracted first as prospecting pits. Overhand cut-and-fill method of mining withflat-back and waste-fill methods are practiced inmica mines.
Pegmatite isexploited by strikingvertical or inclined shaft. As mica is restricted to hanging wall and sometimesto core zone, driving is done only inthese areas. The mica mines aredeveloped to maximum 100 m depths. Non-coringextension drilling is being operated forunderground drainages.
Mining method has been developed and improved in some of the mines in recent years. The oldmethod was tunneling, but now some of the oldmines have been made into open quarries. SBM provides complete series of high performance mica mining plant in India.
In mica mining process, several different types of machines are involved such as drilling and blasting machine, extraction plant, quarry crusher equipment, grinding mill,screening machine etc. SBM is specialized in providing sustainable technology and professional service for mining equipment. We newly developed whole range of mica mining production line for sale, including crushing machine and grinding plant. If you want to find low price and high quality Indian mica mining plant, please contact us.
After extracted from the quarry, mica will be sent to processing plant, which begins with crushing and grinding operation.SBM developed all types of mica crusher and grinding plant for mining operation in India.
There are mobile crusher plants for mica mining.It can be equipped with jaw crusher, impact crusher, cone crusher etc. With new features, the mobile crusher machine provides a really user-friendly, versatile mobile unit. Now, one track-mounted crushing plant can offer 100% crushing capacity for both hard rock and recycling materials that require high capacities.
Grinding is after crushing operation in mica mining process. It is an essential step inmica processing. Different types of mill are applied in milling operation, such as ball mills, vertical roller mill, Raymond mill, ultrafine mill etc.
Development of ever larger ball mill grinding units has helped in the processing of lower grade ores and the simplification of the crushing section, elimination of secondary and tertiary crushing and of the milling section, in terms of the numbers of ball and rod mills used previously. If you are interested, please contact us, we will customize cost-effective mining solution.
Mica is a mineral name given to a group of minerals that are physically and chemically similar. They are all silicate minerals, known as sheet silicates because they form in distinct layers. Micas are fairly light and relatively soft, and the sheets and flakes of mica are flexible. Mica is heat-resistant and does not conduct electricity. There are 37 different mica minerals. The most common include purple lepidolite, black biotite, brown phlogopite, and clear muscovite.
The mica industry can be divided into two distinct but interdependent industries: those that produce sheet mica, and those that produce flake mica. Each industry, although somewhat dependent on the other, produces different end products.
Sheet mica is recovered by either sinking a shaft along the strike and dip of a pegmatite or by open-pit surface mining of semi-hard pegmatite ore. In either case, it is a very economically risky mining procedure because of the cost involved in locating the vein and the unpredictability of the quality and quantity of the mica that might be recovered once the vein is located and worked.
In underground mining, the main shaft is driven through the pegmatite at suitable angles to the dip and strike using air drills, hoists and explosives. Crosscuts and raises are developed to follow promising exposures of mica. When a pocket of mica is found, extreme care is exercised in the removal to minimize damage to the crystals. Small explosive charges of 40% to 60% strength are carefully placed around the pocket and care is exercised with the drilling procedure so the mica will not be penetrated. The charge is just sufficient to shake the mica free from the host rock. After blasting, the mica is hand-picked and placed in boxes or bags for transporting to the trimming shed where it is graded, split, and cut to various specified sizes for sale.
The flake mica produced in the U.S. comes from several sources: the metamorphic rock called schist as a by-product of processing feldspar and kaolin resources, from placer deposits, and from pegmatites. It is mined by conventional open-pit methods. In soft residual material, dozers, shovels, scrapers, and front-end loaders are used in the mining process. North Carolinas production accounts for half of total U.S. mica production. Hard-rock mining of mica-bearing ore requires drilling and blasting. After blasting, the ore is reduced in size with drop balls and loaded on the trucks with shovels for transport to the processing plant, where mica, quartz and feldspar are extracted.
The principal use of ground mica is in the gypsum wallboard joint compound, where it acts as a filler and extender, provides a smoother consistency, improves workability, and prevents cracking. In the paint industry, ground mica is used as a pigment extender that also facilitates suspension due to its lightweight and platy morphology. The ground mica also reduces checking and chalking, prevents shrinkage and shearing of the paint film, provides increased resistance to water penetration and weathering, and brightens the tone of colored pigments. Ground mica also is used in the well-drilling industry as an additive to drilling muds.
The plastic industry used ground mica as an extender and filler and also as a reinforcing agent. The rubber industry uses ground mica as an inert filler and as a mold lubricant in the manufacture of molded rubber products, including tires.
Sheet mica is used principally in the electronic and electrical industries. The major uses of sheet and block mica are as electrical insulators in electronic equipment, thermal insulation, gauge glass, windows in stove and kerosene heaters, dielectrics in capacitors, decorative panels in lamps and windows, insulation in electric motors and generator armatures, field coil insulation, and magnet and commutator core insulation.