Ammonia-free mining method for rare earth ore in south China
A mining method and technology of rare earth mines, applied in the field of ammonia-free mining of rare earth mines in the south, can solve the problems of high ammonia nitrogen content, achieve low production costs and reduce pollution
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[0012] A method for ammonia-free mining of southern rare earth mines, comprising the following steps:
[0013] 1. Rare earth ore leaching: use magnesium sulfate + sodium sulfate solution with a concentration of 1-5% as the ore leaching agent, transport the ore leaching agent to the high-level pool with a water pump, and then transport it to the injection well through the PVC pipe network for drip irrigation and leaching;
[0014] 2. Collection of rare earth mother liquor: the rare earth mother liquor produced during the leaching process is collected into the rare earth mother liquor pool through diversion holes and mother liquor ditch;
[0015] 3. Pre-enrichment of rare earths: Use titration to measure the concentration of rare earths and the pH value of the rare earth mother liquor. According to the liquid-solid ratio of 10:1, add water to adjust the magnesium oxide slurry, and introduce the adjusted magnesium oxide slurry into the rare earth mother liquor through PVC pipes. ...
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