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Shaoye annual production blast ( fuming ) Furnace Slag 150kt, containing Ga30-40t, iron 40kt or so, and over the years piled Slag nearly 2 × 10 3 kt tons, containing Ga up to 400-500t, in current prices , up to ten billion yuan. Shaoye Development Department and other research institutes of scientific research workers right Shaoye gallium recovered a lot of work . Mainly in the following four methods based: high temperature chlorination evaporation method , the whole process of recovery of gallium wet , alkali fusion - leaching , smelting reduction - electrolytic method. High temperature chlorination blast slag recovery of volatile gallium , gallium enrichment to make dust in the dust collection rate of 98% gallium , while its simple process, low energy consumption, but because of its use of the chlorinating agent and chlorine the product of the process of nature and are highly corrosive , so the equipment requiring high corrosion resistance . Meanwhile , the production process of chlorinating agents are 20% HCl, Cl 2 into the exhaust gas , if processing is discharged into the atmosphere will cause pollution . Recovery of Gallium wet the whole process , although the process is relatively simple, gallium leaching rate was also higher, up to 70 % to 80 %, but the total recovery of the whole process of gallium low, only 45% to 51 %, while the acid consumption is large and leachate high content of iron , gallium and iron separation processing costs are high, the output of a large number of difficult and difficult to deal with ferrous sulfate , sulfuric acid leaching and therefore either economically or technically are not reasonable alkali fusion - leaching recovery of gallium Although the leaching rate of gallium 90%, but because the slag leaving the gallium-containing leach solution containing gallium too low , only 60mg / L, to the next extraction larger difficulties . Smelting reduction - electrolytic recovery of gallium, using ferrite France - ironmaking way to make gallium enriched in iron , the process produces a non- magnetic material can be used for direct sale of raw cement clinker , iron, gallium alloy is cast into the anode plate electrolysis , electrolytic production of iron containing more than 99.5% Fe . Magnetic materials can be used as raw material for direct sale . The anode mud is carried alkali leaching electrowinning , electricity
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