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The current national production of synthetic diamond in the world are: the United States, South Africa, Ireland, Sweden, the United Kingdom, Germany, Russia, Ukraine, Armenia, Japan, China, Romania, Poland, Czech Republic, Korea, Greece, India, nearly 20 countries. World synthetic diamond production was 7 to 1 billion kt, where annual output of 100 million karats more countries are the United States, Britain, Russia and so on. Our annual output of 200 million karats of synthetic diamond, ranking first in the world. World production of synthetic diamond growth rate of 8% to 15%.
American GE company, the British company De Beers and Germany Winter company is currently producing synthetic diamond in the world three major groups, the monopoly of the world's production of synthetic diamond technology and consumer markets, represents the development direction of the world of synthetic diamond. More industry-related content can be found at the diamond industry market research analysis report.
GE's 1955 first announced the synthetic diamond industry method, and once in a leading position in terms of a single crystal technology, currently compared with other companies, the company's polycrystalline technology is more advanced, the annual output of 165 million karats , the tonnage presses employed is generally between 38 ~ 100MN.
De Beers company in 1987 synthesized the world's largest gem-quality single crystal (11.14 kt) and industrial grade single crystal (weight 14.20 kt), 1992 also created a synthetic weight 39.40 kt of industrial-grade single crystal diamond world record. It first launched SDA grade synthetic diamond saw blade series, SDA series has become the internationally accepted standard blade grade synthetic diamond grading. DE Beers company based in South Africa, Ireland and Sweden all use 100MN level press factory production, high-pressure mold cavity diameter Φ110mm, such as using SDA technology, synthetic single output of 300 carats, which SDA-class products up to 60% such as the use of MDA production process, a single output of up to 500 kt.
Winter company mainly engaged in the manufacture of diamond tools early, in order to synthetic diamond and diamond tools together into a complete range of products, in 1974 under the auspices of the German government and NATO started to develop synthetic diamond production technology, and surpass, its unique technology and equipment to the production of diamond than the other two companies in terms of quality, such as the finished product impurities was 2 ‰ ~ 3 ‰, a single output of up to 800 kt, with the world's advanced level.
China since 1963, successfully developed the first artificial diamond, in 1966 put into industrial production, annual output is only 10,000 kt. After 30 years of development, the country has more than 600 synthetic diamond production enterprises, the annual output of more than 200 million karats, from production perspective, China has become the world's largest producer of synthetic diamond.
Our synthetic diamond device basically own design and manufacture, mainly for six of the top press. 6 × 6MN the press of the 20th century and put into use before the mid-1980s, is now the majority (about 400) facing out. Currently the main device is a 6 × 8MN the press, now there are several factory production and sales of 6 × 12MN press, which will be the main choice in the future on the new press models.
In the late 1980s, about the introduction of 20 sets of press, mostly below the surface peak 25MN press, the introduction of individual manufacturers 50MN press only, and only a few units, most require further digestion and absorption and the presence of raw materials, mainly spare parts localization and other issues. Domestic press on both sides of the top are also under development, 25MN presses have been put into production. 60MN press both sides at the top of the tireless efforts of Beijing Institute of Technology IOL staff, has made a breakthrough. The press control technology has been higher than 25MN presses, Φ65mm large wound EHV mold has been synthesized diamond.
In 1996, approved by the state to invest several hundred million dollars joint venture project in Baoding Octopus - stable synthetic diamond Tak International Limited was established, the full introduction of foreign advanced production equipment and technology, with an annual 36 million karats of synthetic diamond production line was built in 1997. After the majority of engineering and technical personnel last year and a half of research, to learn advanced foreign experience to solve the problem of the introduction of technology is not in place to produce high-strength synthetic diamond particles. But foreign raw materials expensive, companies unable to afford, thus achieving the acute problem of domestic raw materials placed in front of businesses.
The company in raising the level of technology, improve high quality diamond ratio and yield, while 97.5% of synthetic diamond required more than 40 kinds of raw materials, the progressive realization of the localization and enhanced products in the domestic and international market competitiveness. This production line is put into operation, fill the gaps in China's high-strength diamond production technology, marking China's large production of synthetic diamond particles into the ranks of the world's advanced level.
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