木虫 (正式写手)
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高兴星期五(金币+30, 翻译EPI+1): 2010-05-26 17:16:31
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NH4HCO3, and experiments examining the amount of NH3 • H2O, reaction time, temperature and roasting mine size and other factors influence the transformation process on the Earth, the results show that: when the amount of NH4HCO3, and NH3 • H2O 3 times the theoretical amount of reaction time 3h, the reaction temperature is 30 ℃, roasted ore particle size of 30 mesh, the best transformation of rare earth, rare earth leaching rate can reach 30%; experiment in the process of recovery (NH4) 2SO4 and CaCl2 solutions meet industry standards can be directly used for industrial production or as a product for sale; experiment the prepared rare earth hydroxide purity can reach 30%, dissolved by hydrochloric acid and rare earth chloride solution can be transformed into the rare earth chloride solution was extracted directly or by evaporation of a single crystal of rare earth rare earth chloride processing into products. |
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