Humans have a long history of understanding and developing diamonds . As early as the third century AD, the Indians found the diamond placer, in AD 130 years to the 18th century discovered the "Mountain of Light", "Su Shan", "Great Mughal", "hope" and other Famous diamond. In 1726, Brazil discovered a diamond sand deposit, and the world diamond production center gradually moved from India to Brazil. In 1866, diamond sand mines were discovered in South Africa. In 1867, diamond-bearing kimberlite-type primary deposits were discovered. This is a milestone in the development of diamond mining. The world diamond production center was moved from Brazil to South Africa. Diamond deposits were discovered around the 20th century in Zaire, Russia, Botswana and Australia. Production centers have also been changing, moving from South Africa to Zaire and moving to Botswana and Australia. About 40 diamonds of 500 ct or more have been discovered in the world so far, most recently found in South Africa, especially in the 1905, 3,106 ct, found in the Plymer kimberlite tube in Trumville, South Africa. The largest diamond, known as the "King of Diamonds", was processed into 12 diamonds, the largest of which weighed 530.2 ct, called the "African Star" set on the King's Scepter. Concrete Pump Delivery System includes the concrete pump delivery pipe, Concrete Pump Reducer Pipe, Concrete Pump Elbow, Concrete Pump Rubber Hose, all the parts are used to convey the concrete , all the parts are used on the mobile pump and stationary pump, I am the manufacture of the concrete delivery system, the quality and price is promised Concrete Pump Delivery System Concrete Pumps,Small Concrete Pumps,Used Concrete Pumps,Small Concrete Pump Hebei Shengdebaolong International Trading Co.,ltd , https://www.sdblpumpparts.com
At present, there are nearly 20 countries producing diamonds. The main producing countries are Australia, Botswana, Zaire, South Africa, Russia and Brazil.
Before the Jin Dynasty, China called diamonds into Kunwu Stone. In "Jin Shu", there was a record of diamonds sent to Dunhuang in Xianning three years (AD 277), which was produced in Tianzhu (the ancient India). In the Ming Dynasty (AD 1596), Li Shizhen's description of diamonds in the Compendium of Materia Medica was a diamond that could be drilled, filled with porcelain, or drilled. In the Ming Dynasty (AD 1625), diamonds were unearthed in Shandong. From the end of the 17th century to the beginning of the 18th century, Mr. Zhang Hongjun's "Ancient Mine Record" mentioned that diamonds were found in Xinjiang, Shandong, and Heilongjiang. During the Daoguang Period of the Qing Dynasty (AD 1821 ~ 1850), farmers in Changde and Taoyuan of Hunan Province discovered diamonds during the gold washing. In 1937, when farmers in Shandong Yucheng replanted vegetable fields, they picked up a diamond weighing 218.65 ct, which resembled a chicken and had a golden color. The local farmers called it “Golden Chicken Gems â€.
China's planned geological exploration of diamonds began in 1952. The focus of the 50s exploration was diamond sand ore. From 1952 to 1953, the Geological Department sent experts and formed a census team to conduct exploration and census of the Weihe River Basin in Shandong. In 1953, the Ministry of Geology established the Hunan Lishui Geological Team (later renamed the 413 Team) to carry out the diamond sand mine in the Lishui Basin of Hunan Province. In census exploration work, by 1967, four diamond sand mines such as Hunan Changde were discovered. In 1957, the Ministry of Geology established the Shandong Weihe Geological Team (later renamed the Eighty-nine Team) to conduct a diamond survey of the Weihe River Basin and the Jiaodong area in Shandong Province, and successively identified five diamond sand deposits such as Yuquan and Chenjiatun. After mobilizing the first diamond professional geological conference in 1964 to carry out the general search for diamond primary mines, in 1965, the Guizhou Geological Bureau 101 team discovered the diamond-bearing kimberlite veins in Zhaodong Town. In August of the same year, the Shandong Geological Bureau ○The 9th team found the first industrialized kimberlite-type diamond deposit in China, “Hongqi No.1†in Changmazhuang, Mengyin. In the following years, more than 60 kimberlite bodies were discovered in succession. Five industrial diamond deposits of industrial value in Zhuang, Wangcun, Xitun, Tou Cun and Hongxizhuang; in June 1971, the Liaoning Provincial Geological Bureau depot found diamond-bearing kimberlite pipes in Fu County, Liaoning Province, until 1980 Six industrial grade diamond deposits of No. 30, No. 42, No. 50, No. 57, No. 68 and No. 74 were identified. The discovery and exploration of diamond primary deposits and sand deposits in Liaoning, Shandong, Hunan and other provinces have basically identified the current pattern of diamond mineral resources in China. Since 1988, the Ministry of Geology and Minerals has been insisting on vigorous diamond prospecting and joint ventures or cooperation with mining companies or experts in the United Kingdom, Australia, Belgium, Canada and other countries in Hunan, Shandong, Guizhou, Guangxi, Jiangsu, Hubei. In Jiangxi, Shanxi, Sichuan, Xinjiang, Tibet and other places, work has been carried out extensively and certain progress has been made. [next]
The mining of Chinese diamonds also began in the 1950s. In 1957, the National Planning Commission determined that the Lishui Geological Team was responsible for the formation of China's first diamond sand mine in Changde, Hunan. In August 1958, the Changde Special Administrative Department of Hunan Province started construction of Chexi Chong Mine in Taoyuan County. The diamond 428ct was produced that year, which filled the gap in China that did not produce natural diamond. In 1958, the diamond mine was placed under the management of the Ministry of Construction Engineering. One mining area was expanded into four mining areas. In 1959, it was renamed as the Construction Engineering 601 Mine. After 1974, the annual output was basically stable at over 8 000 ct. Shandong Yucheng Diamond Sand Mine was founded in 1958 by the Luancheng County Industrial Bureau. It produced 247ct of diamonds in 1959. In 1962, it was renamed as the Construction Engineering No. 80 Mine. It was completed and put into operation in 1968, with an annual output of 3 000ct of diamond. In 1967, the Ministry of Geology and the Ministry of Building Materials Industry organized a beneficiation test on the original Mengyin diamond mine in Shandong. Subsequently, the Ministry of Building Materials Industry formed the 701 Mine for mining. The Songjiazhuang Hongqi No. 1 Mine was the first primary mine mined in China. It was put into operation in 1970, with an annual output of 20,000 ct of diamond. In 1978, the Wangjiacun Mine was the first in China. The original diamond mine with an annual output of 100,000 ct was put into operation. In 1980, the Sixth Geological Team of the Liaoning Provincial Bureau of Geology and Mineral Resources established the Binhai Diamond Mine, and tested the No. 50 rock pipe of Wafangdian (Fuxian). In 1981, it produced 8 773ct of diamond, and in 1985, it produced 12 240ct. In 1987, it was produced by Liaoning Province. Bureau, Wafangdian City of Liaoning Province and Shenyang Nonferrous Metals Corporation jointly established Wafangdian Diamond Co., Ltd. to transfer to regular open pit mining. For the past 40 years, the above four diamond mines have made important contributions to the development of diamond production in China. At present, China produces about 10 to 150,000 ct of diamond per year.
According to records, China found that six diamonds weighing more than 90ct were found in Shandong. The first one was discovered in 1937 by Luo Zhenbang, a farmer from Yucheng, who weighed 218.65 ct and was named “Golden Chicken Gemsâ€. This is the largest grain diamond ever discovered in China, but was later swept away by the Japanese invaders; the second was in 1977. Changlin Linyi County was discovered by Wei Zhenfang, weighing 158.786ct, named "Changlin Diamond"; the third was produced in 1981 in the "803" mine in Yucheng, Shandong Province, weighing 124.27ct, named "Chen Yu 1"; The fourth one was produced in the "803" mine, weighing 96.94 ct, named "Chen Yu 2"; the fifth was produced in the "803" mine in 1983, weighing 92.86 ct, named "Chen Chen 3 No. "; the sixth was discovered in the broken ore of the "701" mine in 1983, weighing 119.01 ct, named "Mengshan No.1". In addition, large diamonds weighing 10 to 50 ct are found in numerous cases.