Bronze（powder） is a huge creation in the history of mankind. It is an alloy of red copper and tin and lead (except for zinc and nickel, the alloys that participate in other elements are called bronze), and it is also the earliest alloy in the history of metal casting. After the creation of bronze, it […]

A method for directly preparing copper oxide from copper oxide ore to fully and effectively utilize national copper oxide ore resources. The content and method of the present invention include acid-soluble copper leaching and countercurrent water washing. Solution purification of precipitated copper hydroxide, copper hydroxide dehydration pure copper oxide, four steps, as follows: 1, acid-soluble copper: 10%-15%

High-dose zinc oxide can promote piglet growth and reduce diarrhea rate, which is commonly used in weaned piglets. Because of the many drawbacks of zinc oxide itself, the use of high doses of zinc oxide to prevent piglet diarrhea often has negative effects. On the one hand, affecting the absorption of other trace elements, resulting