Tin Silver
Tin Silver
Chinese tin capital
Written for the old because of tin, because tin and Sheng. From ancient times, the “tin capital” has been recorded in respect of the world attention. .
Old is the birthplace of industry in Yunnan, is a history of 2000 years of mining development and construction of the ancient mining affairs in the past century, built city of the industrial city of more than 50 years, is China’s largest industrial base in modern tin, the world’s earliest and largest tin production base. “Concise Encyclopaedia Britannica,” the third volume of this is written: “old, China’s second largest city in Yunnan Province, the famous tin are.”
According to archaeological discoveries, about five years ago, the old territory known human interest, the Spring and Autumn when the indigenous people have a higher degree of civilization. The Western Han Dynasty, the old is Ben ancient county, with the infiltration of the Central Plains culture, tin, silver, lead mining smelting industry, the rise of the Eastern Han Dynasty has formed a large-scale division of labor. Qing Emperor Kangxi, the tin to the prosperity. Guangxu thirty-one years (1905) years old factory officials and businessmen set up companies, the use of imported machinery, equipment and technology, to hire foreign experts to conduct tin production operations Yunnan Metallurgical Industry opened the first of its kind in modern production. Xuantong first year (1909) years Dianyuetielu bisezhai – river mouth opening, the last century the late 30s, an old tin up to the peak of liberation. At that time the private operators as much as 4400, tin exports is high of more than 1.1 million tons, for the national tin exports more than 90%, ranking first in merchandise exports in Yunnan Province. The early 50s, old tin are listed as one of the 156 key projects, old was also in January 1951 as a provincial municipality, the state concentrate manpower, material and financial resources to the development of an old tin production. In July 1958, Honghe Hani and Yi Autonomous Prefecture People’s Government moved to an old, since then, old as Honghe the political, economic and cultural center, until 2003 the Red River state government to move back to Mengzi.
In addition to the production of tin were broadcast at home and abroad, old rated as non-ferrous metals in Yunnan Province of the Kingdom’s crown. At present the total verified amount of tin, lead, zinc, copper and other non-ferrous metal reserves of more than 800 million tons, of which tin of 182 million tons, accounting for one-third of tin reserves and secondly there are gold, silver and other precious metals and nepheline , feldspar, kaolin and other non-metallic mineral source, nepheline reserves of nearly 30 million tons can be mined for thousands of years. Non-ferrous metal smelting capacity accounted for 33% of the total amount of Yunnan province, 11 series 110 kinds of products are exported to 47 countries and regions. After 50 years of construction, old products have been built with a tin and lead, zinc, copper and other non-ferrous metal-based, chemical, textile, building materials, machinery and electronics, pharmaceuticals, food processing industries such as integrated development of the modern industrial city, has been years of the formation of non-ferrous metal mining, 8.15 million tons, 11.5 million tons ore dressing, smelting production capacity of 215,000 tons. Cumulative production of 1.82 million tons non-ferrous metals, including tin 870,000 tons, the state contributed more than 50 billion yuan, earning 1.3 billion.
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"German Silver" what% 's of tin and other metals are found in this alloy?
I need the proportions in percentages the different elements. The term itself is a misnomer that does not contain any silver. This is a new century in the early 1900 deadline. The chemical formula accurate would be great too. Easy 10 points. !
We just teach people to Google stuff, and using Wikipedia. "… An alloy metal nickel and copper but not always, often zinc. It is named for its silvery appearance, but contains no elemental silver unless silver. Other common names this alloy are German silver, … "Http: / / en.wikipedia.org / wiki / Nickel_silver" Many alloys fall within the general term of "alpaca." All contain copper and nickel, while some formulations may also contain zinc, antimony, tin, lead or cadmium. A representative industrial formulation, Alloy No. 752, is 65% copper, nickel 18% and 17% zinc. "Http://en.wikipedia.org/wiki/Nickel_silver
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