Metal composite panel refers to a metal plate covered with another metal plate to save resources and reduce costs without reducing the use effect (anti-corrosion performance, mechanical strength, etc.) Effect. Composite methods usually include explosion composite method, explosion rolling composite method, rolling composite method, etc. Composite materials can be divided into composite plates, composite pipes, composite rods, etc. Mainly used in anti-corrosion, pressure vessel manufacturing, power construction, petrochemical, pharmaceutical, light industry, automobile and other industries. Due to the performance functionalization, lower cost and wide range of applications of heterogeneous metal composites, the development potential of traditional metal composites has been improved. With the strengthening of the implementation of national environmental protection industry policies, the application of rare metal composite materials in power flue gas desulfurization equipment continues to grow. At the same time, the degree of localization of investment in the chemical industry has greatly accelerated, which also provides good development opportunities for the development of rare metal materials. The support of national industrial policies, high technical barriers, and the demand for industrial upgrading provide broad space for the development of the industry.