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liufengbao100
ľ³æ (ÕýʽдÊÖ)
foreverhappy
- ·ÒëEPI: 16
- Ó¦Öú: 0 (Ó×¶ùÔ°)
- ¹ó±ö: 0.004
- ½ð±Ò: 1848.7
- É¢½ð: 118
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- Ìû×Ó: 642
- ÔÚÏß: 142.9Сʱ
- ³æºÅ: 522574
- ×¢²á: 2008-03-10
- ÐÔ±ð: GG
- רҵ: ÄÜÔ´»¯¹¤
¸ßÐËÐÇÆÚÎå(½ð±Ò+30, ·ÒëEPI+1): 2010-05-26 17:16:31
| 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 ¡æ, 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. |

2Â¥2010-05-26 11:11:44














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