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Slag is a by-product of smelting (pyrometallurgical) ores and recycled metals. Slag is mainly a mixture of metal oxides and silicon dioxide. Broadly, it can be classified as ferrous, ferroalloy or non-ferrous/base metals. Within these general categories, slags can be further categorized by their precursor and processing conditions.
Copper extraction refers to the methods used to obtain copper from its ores. The conversion of copper ores consists of a series of physical, chemical and electrochemical processes. Methods have evolved and vary with country depending on the ore source, local environmental regulations, and other factors.
Chrysoprase, chrysophrase or chrysoprasus is a gemstone variety of chalcedony that contains small quantities of nickel. Its color is normally apple-green, but varies from turquoise-like cyan to deep green. The darker varieties of chrysoprase are also referred to as prase.
Vale, formerly Companhia Vale do Rio Doce, is a Brazilian multinational corporation engaged in metals and mining and one of the largest logistics operators in Brazil. Vale is the largest producer of iron ore and nickel in the world. It also produces manganese, ferroalloys, copper, bauxite, potash, kaolin, and cobalt, currently operating nine hydroelectricity plants, and a large network of railroads, ships, and ports used to transport its products.
Mining in Japan is minimal because Japan does not possess many on-shore mineral resources. Many of the on-shore minerals have already been mined to the point that it has become less expensive to import minerals. There are small deposits of coal, oil, iron and minerals in the Japanese archipelago. Japan is scarce in critical natural resources and has been heavily dependent on imported energy and raw materials. There are major deep sea mineral resources in the seabed of Japan. This is not mined yet due to technological obstacles for deep sea mining.
NMDC Limited, formerly National Mineral Development Corporation, is an Indian public sector undertaking involved in the exploration of iron ore, copper, rock phosphate, limestone, dolomite, gypsum, bentonite, magnesite, diamond, tin, tungsten, graphite, coal etc. It is India's largest iron ore producer and exporter, producing more than 35 million tonnes of iron ore from three mechanized mines in Chhattisgarh and Karnataka. It also operates the only mechanized diamond mine in the country at Panna in Madhya Pradesh.
Mining in Australia has long been a significant primary sector industry and contributor to the Australian economy by providing export income, royalty payments and employment. Historically, mining booms have also encouraged population growth via immigration to Australia, particularly the gold rushes of the 1850s. Many different ores, gems and minerals have been mined in the past and a wide variety are still mined throughout the country.
Mining in Western Australia, together with the petroleum industry in the state, accounted for 94% of the State's and 46% of Australia's income from total merchandise exports in 2019–20. The state of Western Australia hosted 123 predominantly higher value and export-oriented mining projects and hundreds of smaller quarries and mines. The principal projects produced more than 99 per cent of the industry's total sales value.
Mining in Iran is still under development, yet the country is one of the most important mineral producers in the world, ranked among 15 major mineral-rich countries, holding some 68 types of minerals, 37 billion tonnes of proven reserves and more than 57 billion tonnes of potential reserves worth $770 billion in 2014. Mineral production contributes only 0.6 percent to the country's GDP. Add other mining-related industries and this figure increases to just four percent (2005). Many factors have contributed to this, namely lack of suitable infrastructure, legal barriers, exploration difficulties, and government control.
The economy of Kosovo is a transition economy. Kosovo was the poorest province of the former Yugoslavia with a modern economy established only after a series of federal development subsidies in the 1960s and the 1970s.
The mineral industry of Russia is one of the world's leading mineral industries and accounts for a large percentage of the Commonwealth of Independent States' production of a range of mineral products, including metals, industrial minerals, and mineral fuels. In 2005, Russia ranked among the leading world producers or was a significant producer of a vast range of mineral commodities, including aluminum, arsenic, cement, copper, magnesium compounds and metals, nitrogen, palladium, silicon, nickel and vanadium.
Mining in the United Kingdom produces a wide variety of fossil fuels, metals, and industrial minerals due to its complex geology. In 2013, there were over 2,000 active mines, quarries, and offshore drilling sites on the continental land mass of the United Kingdom producing £34bn of minerals and employing 36,000 people.
The Dushkaja mine is one of the largest nickel mines in Kosovo. The mine is located in Drenas in Pristina district. The mine has reserves amounting to 6.35 million tonnes of ore grading 1.29% nickel, 0.05% copper, 24.29% iron, 44.09% silica and 9.33% magnesite thus resulting 82,000 tonnes of nickel, 3,175 tonnes of copper, 1,542,400 tonnes of iron, 2,800,000 tonnes of silica and 592,500 tonnes of magnesite.
The Gllavica mine is one of the largest nickel mines in Kosovo. The mine is located in Drenas in Pristina district. The mine has reserves amounting to 6.24 million tonnes of ore grading 1.25% nickel, 0.05% copper, 21.53% iron, 50.89% silica and 13.52% magnesite thus resulting 96,700 tonnes of nickel, 3,120 tonnes of copper, 1,340,000 tonnes of iron, 3,180,000 tonnes of silica and 844,000 tonnes of magnesite.
The Goleš mine is one of the largest magnesite mines in Kosovo, located in Kosovo Polje, Pristina District. The mine has reserves of 1.74 million tonnes of ore, 46.23% magnesite and 2.66% silica, amounting to 804,400 tonnes of magnesite and 46,300 tonnes of silica.
The Strezovce mine is one of the largest magnesite mines in Kosovo. The mine is located in Kosovo Polje in Pristina district. The mine has reserves amounting to 3.66 million tonnes of ore grading 40.49% magnesite and 9.29% silica thus resulting 1,482,000 tonnes of magnesite and 340,000 tonnes of silica.
Natural resources are abundant in Kosovo. Kosovo is mainly rich in lignite and mineral resources such as: coal, zinc, lead, silver and chromium, but also with productive agricultural land. Kosovo is also rich in forests, rivers, mountains and soil; Kosovo is especially rich in coal, being aligned among European countries as the third with the largest coal reserves. Kosovo possesses around 14,700 billion tons of lignite in reserves, which aligns Kosovo as the country with the fifth largest lignite reserves in the world.
Mining in North Korea is important to the country's economy. North Korea is naturally abundant in metals such as magnesite, zinc, tungsten, and iron; with magnesite resources of 6 billion tonnes, particularly in the North and South Hamgyong Province and Chagang Province. However, often these cannot be mined due to the acute shortage of electricity in the country, as well as the lack of proper tools to mine these materials and an antiquated industrial base. Coal, iron ore, limestone, and magnesite deposits are larger than other mineral commodities. Mining joint ventures with other countries include China, Canada, Egypt, and South Korea.
The Bela Stena mine is one of the largest magnesite mines in Serbia. The mine is located in Bela Stena in Raška District. The mine has reserves amounting to 4 million tonnes of ore grading 44% magnesite and 1.5% silica thus resulting 1.76 million tonnes of magnesite and 60,000 tonnes of silica.
The mining industry of Yemen is at present dominated by fossil mineral of petroleum and liquefied natural gas (LNG), and to a limited extent by extraction of dimension stone, gypsum, and refined petroleum. Reserves of metals like cobalt, copper, gold, iron ore, nickel, niobium, platinum-group metals, silver, tantalum, and zinc are awaiting exploration. Industrial minerals with identified reserves include black sands with ilmenite, monazite, rutile, and zirconium, celestine, clays, dimension stone, dolomite, feldspar, fluorite, gypsum, limestone, magnesite, perlite, pure limestone, quartz, salt, sandstone, scoria, talc, and zeolites; some of these are under exploitation.
References
- 1 2 3 "Kosovo Mining Journal" (PDF). beak.de. 2010. Archived from the original (PDF) on 2011-07-18. Retrieved 2010-10-03.