In fact, the use of cobalt has never stopped since ancient times. The ancient Greeks and Romans used it to make colored glass. The blue color on the famous tri colored porcelain of the Tang Dynasty in China is also a masterpiece of cobalt. In modern times, cobalt and its alloy products have been widely used in many industrial fields, such as machinery, chemical industry, and even special aerospace. It can be said precisely that today's cobalt has become a very important strategic metal. Cobalt is particul