divides metal deposits into: 1 black metal deposit in accordance with industrial use and metal properties. Including iron, manganese, vanadium, titanium, chromium and other deposits, mainly for metallurgical industries. 2 non-ferrous metal deposits. Aluminum, magnesium, copper, lead, zinc, nickel, cobalt, tungsten, tin, molybdenum, mercury, and antimony, etc. for electrical, aviation, machinery, communication, shipbuilding, architecture, chemical and other departments. 3 rare and rare earth metal deposits. Rare metals include lithium, cesium, niobium, tantalum,, 铷,, zirconium, and rare earth metals include 17 elements such as ruthenium, ruthenium, ruthenium, ruthenium,, 钐. They have a very low abundance in the crust, not easy to enrich or have more difficulties in choosing a technique, but there is special purpose in industrial, mainly for aerospace, atomic energy, oil, chemical, electronic and other departments. 4 precious metal deposit. A group of nature is unique, expensive, including gold, silver and platinum group metals (platinum, palladium, ruthenium, rhodium, ruthenium, ruthenium). 5 radioactive metal deposit. Including uranium and ruthenium, for atomic energy industry and metallurgy, instruments and medicine. 6 dispersion element deposit. Since it is difficult to form an independent mineral, it is called a dispersion element, including germanium, gallium, indium, 铊, cadmium, 钪, selenium,,, hafnium, etc., for electron, metallurgy , Chemical, petroleum, aerospace and other departments.
