The sparse elements are present in the relevant carrier minerals in the form of isomorphism and in the presence of fine particulate minerals. Thus with the main metal to be concentrated in the dressing and smelting process and comprehensive recovery. Such as indium, gallium, germanium, thallium, cadmium, selenium, tellurium, and the like often are hosted by lead and zinc concentrates, i.e. their mineral carrier. The rare metal is enriched in by-products during the main metal smelting process and is the main way to comprehensively recover rare metals. Recyclable selenium, tellurium, thallium and rhenium anode mud and dust from the copper smelting; recoverable indium, gallium, thallium, cadmium and selenium and tellurium from the dust, slag, and the slag leaching solution in lead and zinc smelting; from tin smelting recovering slag or indium electrolyte; recoverable selenium and tellurium from a nickel smelting; mother liquor is returned in the production of aluminum or gallium is recovered from the electrolysis of NaAlO2 dust; rhenium recovered from the flue gas in the smelting molybdenum; ironmaking slag and dust from recyclable germanium, gallium, selenium and tellurium, thallium even; dust generation from the burning coal, coal ash recovery of germanium and gallium. Engine Oil Cap,Engine Spout Cap,Plastic Cap,Screw Cap Guangzhou Futen Plastic & Metal Products Co.,Ltd , https://www.futencan.com