Ionic rare earth ore extraction method in detail

Ion adsorption type rare earth ore saprolite weathering crust known rare earth deposits, the late 1960s, first in southern Jiangxi Province, Long foot hole discovered, and later another in Fujian, Hunan, Guangdong, Guangxi, Nanling region have been found, but in Jiangxi more concentrated, large. Ion adsorption type rare earth mine is a foreign country had not been reported unique new rare earth deposits.

After decades of research, to identify the type of ground ore widely distributed, large reserves, low radioactivity, easy exploitation, extraction of rare earth process is simple, low cost, product quality is good. English name ion-absorbingtyperareearthsore ion adsorption type rare earth ore, mainly distributed in China, Jiangxi, Guangdong, Hunan, Guangxi, Fujian and other places.

Currently ionic rare earth ore extraction method, there are two

(1) with NaCl from the ion adsorption type rare earth ore extracted using NaCl handle this type of ore is the main chemical beneficiation methods, shipped from stope ore, sent a rectangular concrete ponds soaking, leaching solution through the pool the filter layer from the bottom discharge outlet, leaching residue with manual removal, leaching solution in a saturated solution of oxalic acid precipitation, filtration, the filtrate was supplemented with lime and salt, and then returned; cake is the rare earth oxalates, after burning, washed, and then burning with mixed rare earth oxides. The process is currently the main problems is the leaching residue containing NaCl is high, resulting in soil salinization.

(2) method using ammonium sulfate (NH4) 2SO4 ore extracted from the ion adsorption rare earth, in recent years, the success of research methods. And NaCl method is different in that, with 1% to 2% (NH4) 2SO, solution immersion ore, followed by precipitation with oxalic acid to obtain rare earth oxalates, and then after the first ignition can be obtained with REO> 90% of the mixture of rare earth oxide, the filtrate was supplemented with sulfuric acid and then press Back. Compared with NaCl, which will not cause leaching residue on the soil salinization.


Rare Earth Supplier: Chinatungsten Online - http://www.chinatungsten.com
Tel.: 86 592 5129696; Fax: 86 592 5129797
Email: sales@chinatungsten.com
Tungsten Picture Center: http://picture.chinatungsten.com
Tungsten Video Center: http://v.chinatungsten.com
Tungsten News & Tungsten Prices, 3G Version: http://3g.chinatungsten.com

• < Prev
• Next >