South Africa crusher machine
South Africa’s gold industry has been the principal focus of black economic empowerment, resulting in a changing ownership structure. With the increase in the price of gold and the worldwide economic slowdown, investment in gold has increased, with investors seeking safe haven investments. Demand for gold also increased in 2009, particularly from India and China.
In the construction industry, the manufacturing of cement, lime, the important raw materials are sandstones. Sandstone is crushed by stone crusher and grinded by grinding mill to get final stone materials. NFLG can supply you many types sandstone crushers such as jaw crusher , impact crusher, hydraulic impact crusher , spring cone crusher , hydraulic cone crusher, CS cone crusher.
In recent years, NFLG has developed a new type stone crusher for sandstone crushing industry which is named crawler type mobile crusher . Mobile Crusher engine can be additionally equipped with low temperature preheating start-up device to ensure the machine easy to start under the condition of minus 25 temperatures.
Gold mining Crusher and crushing plant
Up until a few years back South Africa was the world’s largest gold producer. China surpassed South Africa as the world’s largest producer in 2007. China continues to increase gold production and remained the leading gold-producing nation in 2009, followed by Australia, South Africa, and the United States. According to the US Geological Survey, South Africa produced 210 metric tons of gold in 2009.
South Africa is estimated, by US Geological Survey, to have 6000 metric tons of gold reserves. 95% of South Africa’s gold mines are underground operations, reaching depths of over 3.8 km. Coupled with declining grades, increased depth of mining and a slide in the gold price, costs have begun to rise, resulting in the steady fall in production. The future of the gold industry in South Africa therefore depends on increased productivity.
South Africa’s enormous gold ore reserves represent a substantial part of the world’s reserves. The main gold producing area is concentrated on the Archaean Witwatersrand Basin. The Witwatersrand basin, which has been mined for more than 100 years and has produced more than 41 000 t of gold, remains the greatest unmined source of gold in the world. Major new projects, new technology, new approaches to the organisation of work, better labour relations and some commercial innovations are starting to reshape this industry.
Unlike most other gold deposits in the world, the Witwatersrand (“Wits”) is a gold placer deposit, with gold being hosted by conglomerates and grits. The Wits sedimentary basin is massive and stretches through an arc of approximately 400km across the Free State, North West and Gauteng Provinces. The gold bearing conglomerates or reefs are generally tabular with varying dips. Most of the Wits basin is covered by later stage sediments of the Ventersdorp and Karoo groups, with the Wits outcropping in Johannesburg, which started the Wits gold rush over a hundred years ago and resulted in formation of the city of Johannesburg.. South Africa does have other smaller gold producers outside of the Witwatersrand, in the form of Archaean greenstone belts. The main gold producing greenstone belts are the Barberton Greenstone Belt and the Kraaipan greenstone belt. The Barberton greenstone belt is situated in the Mpumalanga province, just north of Swaziland. The Kraaipan belt is located west of Johannesburg, near Kuruman. Other smaller belts exist in the Northern Province, but have been worked sporadically.