Recently, Zhuzhou Cemented Carbide Group Co., Ltd. (referred to as “Shu Hard†Company) was the main project of “Developing and Applying Key Technologies for Difficult to Develop Tungsten Resources†and won the first prize of National Science and Technology Progress Award. What kind of technology is this? What is the significance of overcoming this technology? Yesterday, the reporter interviewed Zhang Zhongjian, deputy general manager of “Zhu Hardâ€. “Whether black tungsten or white tungsten is used, it is a good tungsten.†Tungsten is a rare metal and an important strategic metal. Because it is a high specific gravity alloy and corrosion resistant, it can be widely used in mining, oilfield exploration and machining, automobile manufacturing, aviation, navigation, military and other fields. “In normal life, there are many things to use tungsten, such as watch chains, tungsten bulbs, cell phone vibrators, etc.†Zhang Zhongjian said that China’s tungsten reserves rank first in the world, with a total reserve of more than 30 countries (1.3 million tons). ) more than 3 times. Half of the world's tungsten semi-finished products flow from China. Tungsten has black tungsten and white tungsten, and there is a clear gap between the two. The white tungsten has a low grade, many impurities and is difficult to decompose. The grade and content of black tungsten are very high, and it has been developed and applied to the industry for a long time. “There is less and less black tungsten resources.†Zhang Zhongjian said that before 2002, on the market. Only black tungsten was used, and white tungsten was used after 2002. However, since the purity is not improved, the use of cemented carbide produced by white tungsten is not satisfactory. "But modern industry does not have tungsten, and it will not work." Zhang Zhongjian said that since 2006, Zhuzhou Cemented Carbide Group and Central South University have decided to find out the existence value of white tungsten. This "key technology for the deep development and application of difficult tungsten resources" has broken through the theory that the scheelite cannot be alkali-decomposed at home and abroad, and invented the short-flow deep-depletion and self-regulating the structure of hard alloys from resource utilization. The complete set of key technologies generated by high-end products allows white tungsten to achieve the grade and use effect of black tungsten. Zhang Zhongjian said with a smile, the scientific research results, whether it is black tungsten or white tungsten, the effect is "good tungsten." The service life of tungsten resources has been extended for more than 25 years. At present, China's black tungsten resources can only be mined for 1 to 2 years, while China's white tungsten resources account for 80% of tungsten ore resources, about 3 million tons. The Municipal Science and Technology Bureau said that this technology enables the use of white tungsten, which will ensure that the service life of tungsten resources in China will be extended by more than 25 years, which can solve the needs of major aerospace and other projects in China. "In the past, although China was a tungsten-producing country, it was not a tungsten-producing country." Zhang Zhongjian said, "China's tungsten resources are exported semi-finished products, and 75% of finished products are imported from abroad. Tungsten resources are only exported to 100,000 tons per ton. 200,000 yuan, and in turn, our finished products containing tungsten resources generally cost more than 2 million yuan, and the price difference is more than 10 times." He said that this technology can not only improve the utilization rate of white tungsten, but also meet the nationals. The need for economic development can also promote the development of high-end cemented carbide containing tungsten resources and improve the grade of cemented carbide. At present, China's tungsten resource smelting technology has reached world-class level and has won 21 national invention patents. Zhang Zhongjian said that in the next few years, "Zhu Hard" will further research new mesh-like cemented carbide, nano-coating and composite coatings, extra-large hard alloys, ultra-fine (coarse) and nanocomposites to increase Product durability and improved product life.
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