Germanium and gallium as rare metal were widely used in the electronics industry, semiconductor, infrared optics, optical fiber, medicine, metallurgy, energy, etc. At the same time, as the scattered metal, enrichment extraction technology was essential. So far, extraction method which had been industrialized had much less. With economic development, demand of germanium and gallium will be increasing and the existing capacity and resources can not meet the market demand. So comprehensive recycling of...