Felspar MINING & MARKETING

feldspar mining crusher malaysia

Feldspar Mining Crusher Malaysia

Felspar is won chiefly from pegmatites. Mining is carried out, generally, by opencast method. Significant output of felspar is obtained as an associated mineral during mining of quartz, mica and to some extent beryl. Bhilwara and Ajmer districts in Rajasthan and Mahaboobnagar and Nellore districts in Andhra Pradesh are the important mining centres in the country.

Feldspar crusher may be the crushing machine that’s used in feldspar mashing plant. In the actual feldspar mine quarry, all of us usually crush feldspar my own into 40-80 nylon uppers, 80-120 mesh, or even more than 120 nylon uppers. Because Moh’s solidity of feldspar is all about 6, most parts associated with stone crusher may be used in feldspar mashing plant. Small jaw crusher as well as hammer crusher is the most favored machine in feldspar quarry grow.

The pegmatite bodies are exposed by the removal of top soil and overburden. It is then broken either manually or by drilling and blasting. Vlechanised production of felspar has been widely adopted in Indian mineral industry since long; moving the industry forward from hand cobbled method, employed by small producers. The broken material is sorted out and sized. Crushed felspar is separated mechanically by suitable screens to meet market requirements. The general demand is for 30/80 mesh, 100 mesh, 150 mesh, 180 mesh, 200 mesh and 250 mesh material. Washing is sometimes done to upgrade the product by removing clay, etc. The processed felspar is bagged and despatched to different consignees.

The processing of felspar involves usually flotation or magnetic separation to remove accessory minerals like mica, garnet, ilmenite and quartz. Silica in the form of quartz in pegmatites and silica sand in felspathic sand deposits are obtained as co-products of mining. In some applications, presence of silica is advantageous. Other users require extremely pure and finely-ground grades. Glass grade felspar is usually the most coarse material. The filler application demands finely-ground material. A modern processing plant is located at Kodthal in Mahaboobnagar district Andhra Pradesh and 12 processing plants in Rajasthan cater to ceramics and glass industries.

USES

Potassium felspar obtained from pegmatites is used traditionally as a source for alumina and alkali in ceramic and glass industries which account for more than 90% consumption. It also finds use as functional filler in paint, plastic, rubber and adhesive; as a bonding agent in abrasives; and in the manufacture of artificial teeth, fertilizer and white cement. Certain varieties of felspar (like moonstone) are used as semi-precious stones.

In ceramic industry, felspar is used as fluxing agent in softening, melting and wetting other batch constituents. The flux controls the degree of vitrification of the ceramic body during firing. Potash felspar has technical advantages over sodium felspar. After clay, felspar is the biggest ingredient in the raw material batch for ceramic bodies. Typical felspar contents are < 25% in earthenware, 25-35% in sanitaryware, 15-30% in whiteware, 10-55% in floor and wall tiles and 30-55% in electrical porcelain. For glass industry, the alkali content in felspar acts as a flux,lowering the glass batch melting temperature and thus cutting production cost. The mineral is primarily added for alumina content which varies from 0.05% for flat glass, 8% for container glass, 11 % for some speciality glasses and up to 18% for insulation fibreglass.

In the abrasive industry, plagioclase felspar is used as a mild abrasive material in scouring powders because of its semi-conchoidal fracture, although its hardness is 6 on Vlohs’ scale. In refractory industry, felspar is used as one of the batch constituents in the manufacture of acid-proof refractories. In welding electrode industry, felspar is used as a flux which acts as an arc stabilizer and helps in weld-pool protection.

Physical properties like good dispersability, chemical inertness, stable pH, low free silica content and brightness of 89-95% impart finely-ground felspar materials an excellent filler qualities.

INDUSTRY

Ceramic industry in India is about a century old and has formed a sizeable industrial base. It comprises ceramic tiles, sanitaryware and crockery items. The industry has its base both in large and small-scale sectors with wide variance in type, size, quality and standard. Manufacturing units are spread all-over India. The state-of-the-art ceramic goods are manufactured in the country. The domestic technology is of international standard. During the last two decades, there has been a phenomenal growth in the field of technical ceramics to meet specific demands of industries like high alumina ceramic, cutting tools and other structural ceramics.

As per the data from Department of Industrial Policy & Promotion, Ministry of Commerce & Industries, there are at present 16 ceramic glazed tiles units in the organised sector and about 200 units in SSI sector. Production of glazed ceramic tiles in 2007-08 was 290 million sq m. This sector accounts for about 2.5% of the world ceramic tile production. In India, the per capita consumption of ceramic tiles (0.3 sq m) is much less than that in European countries (5-6 sq m). The demand of ceramics is expected to increase with the growth in the housing sector.

Sanitary and pottery items are also produced by both large and small-scale sectors. Sanitaryware has been growing 5% per annum during the last two years. There were 7 units of sanitarywares with an installed capacity of about 143 thousand tpy in organised sector and about 200 plants with total 50,000 tpy capacity in the small-scale sector. Production of sanitaryware in 2007-08 was 366 thousand tonnes in the organised sector. There are 16 units of potteryware in organised sector, having a total installed capacity of 43,000 tpy. Production of potteryware in 2007-08 was about 59 thousand tonnes in organised sector. Majority of the production of ceramic tableware is of bone china and stoneware.

The glass industry comprises containers, hollowware, tableware, float glass, vacuum flasks, refills, laboratory glassware, fibre glassware, etc. Float glass and glass fibre are classified as high priority items. Vlost of the other items are reserved for SSI. Currently, both sheet and float glass types are exported to South Asia, East Asia and South & East African countries.

There are 43 units producing glass containers and hollowwares, having an annual installed capacity of 15 lakh tonnes. The production in 2007-08 (up to December 2007) was 6.75 lakh tonnes. There are six units producing laboratory/ scientific glassware in the country.

Firozabad in Uttar Pradesh, popularly known as “Glass City of India’, is the chief centre of small-scale glass production units. These units make the most innovative items of glass which are exported to different parts of the world. This town accounts for about 70% production in small-scale sector.

CONSUMPTION

Felspar is used mainly in ceramic, glass and cement industries. Minor quantity of felspar is consumed by refractory, abrasive and electrode industries. Total consumption of felspar in 2007-08 was estimated at 312,100 tonnes in the organised sector. Of the total consumption, the ceramic industry accounted for 78%, glass industry 17%, and remaining 5% by cement, abrasive, refractory, electrode industries, etc.

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