Contact Us
Xiamen Everbeen Magnet Electron Co., Ltd.
Add: Unit H, 4F Beirongxin Mansion, No. 8 Xinfeng 2nd road, Torch Hi-Tech Zone, Xiamen, China.
Tel: 0086-592-5781916
Fax: 0086-592-5123653
Home > Industry Trends

Industry Trends

Concentrated NaOH solution decomposition of Baotou Rare Earth Mine Technology
Time:06/09/2011

  Concentrated NaOH solution decomposition of Baotou Rare Earth Mine Technology

  With the rapid development of science and technology, green, environmentally friendly, enjoys popular support, alkaline decomposition process of Baotou Rare Earth Concentrate more and more people of all ages. In order to overcome the production process of alkali chemical beneficiation first production is not continuous leaving the shortcomings, the paper concentrated alkaline mixture of rare earth deposits in Baotou direct decomposition process was studied, experimental use of Baotou Rare Earth Ore and 70% of the hydroxide Mixing baking soda solution, the reaction from the beginning of the solid - liquid phase to the end of the solid - solid reaction, the effects of process conditions before and after the phase change rate of decomposition of rare earth.

  The main contents are the following three aspects:

  1. Mechanism.

  Baotou Rare Earth Concentrate on adding NaOH to the thermal analysis study of the thermal decomposition mechanism of complex systems.

  2. Static conditions decomposition of rare earth minerals roasting and leaching.

  Of the Baotou Rare Earth Mine in the process of calcium in the process of rare earth and the recovery in decomposition rate. By comparing the experimental data show that in this process study, in addition to calcium and calcium is not removed when the difference between the smaller rare earth leaching rate, indicating the presence of calcium than the decomposition rate of the main factors of rare earth, therefore, without chemical processing and direct Calc decomposition of rare earth concentrates of base technology is feasible.

  Four levels with a three-factor orthogonal experiment of mine in the base than under static conditions, calcination temperature and calcination time on the rate of decomposition of rare earth. The results show that the ore roasting reaction of alkali ratio of the largest, followed by calcination temperature and calcination time, test, the optimal process conditions: mineral alkali ratio was 1:1, calcination temperature is 400 ℃, baking time is 90min. RE decomposition rate can reach 84.80%.
 

         Everbeen magnets supply you the rare earth magnets such as neodymium magnets,ceramic magnets,which is the strong magnets and permanent magnets.and rubber magnets,fridge magnets,Refrigerator Magnets etc.
Xiamen Everbeen Magnet Electron Co.,Ltd. http://www.chinamagnets.biz
Add:Unit H, 4F Rihua Mansion, No. 8 Xinfeng 2nd road, Torch Hi-Tech Zone, Xiamen, China.
Tel:0086-592-5781916
Fax:0086-592-5123653
E-mail:sales@china-magnet.net

 

  Static experiments, calcination, with the calcination temperature, F decreased in the roasting ore, 400 ℃ after the reaction of fluorine effects of variation, F escape of gas in the form of air pollution.

  3. Dynamic conditions decomposition of rare earth minerals roasting and leaching.

  1:1 with mineral bases, respectively, and the temperature in the low-temperature conditions, the different tastes of the rare earth concentrate with 70% NaOH solution, after mixing the dynamic roasting. Experimental results show that dynamic calcination, the 50% decomposition of rare earth rare earth concentrate grade could reach 93.84%, up 98.44%.

  Roasting in the dynamic experiments, Bastnasite decompose more completely washed F to F in the form of lotion in the water. Roasted ore by acid, 98% of Th present in the earth to Th4 + leaching solution, the decomposition of the residue by alkali non-radioactive slag, and slag is small.

  The decomposition process can remove the base of traditional process of "pickling calcium removal" process, a continuous process, process no emissions and radioactive waste, rare earth, thorium, fluorine and phosphorus Dengjun be recovered, to the clean production and comprehensive utilization of resources purposes.