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Originally, pyrophyllite was quarried and locally used for tombstones and building stone and to carve ornaments and utensils such as pots, dishes and cases.
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Currently, it is milled and processed near where it is mined to produce material used for the production of a wide variety of products. They include acid-resistant lab ceramics, refractory bricks and linings, filler in paint, electrical insulation, boilermaker's chalk, chromic-acid purification pots, and crucibles used in the manufacture polycrystalline-diamonds. Blocks of pyrophyllite are stilled quarried and sold as either "Wonderstone" or "African Stone" for sculpting. It can be easily carved with rasps and power tools and finished with a beautiful polish.
The quarries are also the source of naturally grooved, spherical to disk-shaped, and sometimes intergrown concretions composed of either hematite , pyrite , or wollastonite , which are collected by gem, mineral, and rock collectors and subject of much folklore.
From Wikipedia, the free encyclopedia. Place in North West, South Africa. Places adjacent to Ottosdal. Sannieshof Lichtenburg Coligny Delareyville.
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District seat: Mahikeng. Kraaipan Madibogo Setlagole. Bakerville Biesiesvlei Coligny Itsoseng Lichtenburg.
Categories : Populated places in the Tswaing Local Municipality Populated places established in Hidden categories: Articles with short description Short description matches Wikidata Coordinates on Wikidata. Namespaces Article Talk.
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Views Read Edit View history. Help Learn to edit Community portal Recent changes Upload file. Download as PDF Printable version. North West. Ngaka Modiri Molema. Hartbeesfontein Klerksdorp. However, a fairer comparison may be comparing the output of the three former Western Deep Levels operations now Tau Tona, Savuka and Mponeng which since have produced over 59 million ounces of gold.
Driefontein, which has produced 3, tonnes of gold, still has reserves of 23 million ounces and its orebody is open at depth. The mine is also a record breaker in other aspects.
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Its average working depth is 2. It has three metallurgical operations, which have a total milling capacity of some , tonnes a month of ore. This includes a central elution facility established in The grade of ore from underground at Driefontein is about 8. The mine is winding down this surface tonnage, while increasing its tonnages from underground. By June it will have built up its underground tonnages to a peak of , tonnes a month. After its discovery, West Driefontein was floated in and began producing seven years later.
It suffered a disaster in when a large sinkhole opened under a seven story processing plant house, killing 29 people.
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The mine was almost lost later in the , when a sudden inrush of water at No 4 shaft sent million litres of water a day into the mine. It overwhelmed the pumps, and the flow was only stopped after two giant plugs and special drainage pipes were installed. Today Driefontein pumps 65 million litres of water a day from underground. The flooding event slowed the development of East Driefontein, which only began production in By East Driefontein was among the lowest cost producers in the world.
Both East and West Driefontein continued to report their results separately until when East and West merged.
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The mine, once described at the eighth wonder of the world has also been at the centre of more than one power struggle. In the past Driefontein has been coveted by Anglo American, which wanted to control the whole West Wits gold field. Anglo American has done well in this gold field, but in spite of its desire, never managed to get its hands on Driefontein.
The mine will continue to produce at over one million ounces of gold a year for about the next 20 years. If Driefontein is indeed used as the benchmark, then he is correct and there are very very few world class ore bodies out there. Sign in.