Superconducting pulsating high gradient magnetic separation for fine weakly magnetic ores: Cases of kaolin and chalcopyrite
Abstract
Superconduction was firstly combined into pulsating high gradient magnetic separation (PHGMS) technology to improve its separation performance for ultrafine magnetic particles. In this investigation, the superconducting PHGMS (SPHGMS) process was theoretically described and a cyclic pilot-scale SLon-CD100 superconducting PHGMS (SPHGMS) separator with magnetic induction reaching 9.0 T was briefly introduced, and then the separator was used to purify an ultrafine kaolin ore and separate a low-grade chalcopyrite ore. The separator has achieved a significantly improved removal rate for iron impurities from the kaolin ore compared with the PHGMS method, and it achieved an effective separation for the chalcopyrite ore with Cu recovery reaching higher than 90%. This SPHGMS method has provided a highly prospective technique for the purification of ultrafine non-metallic ores, and a potential approach for the sufficiently economic separation of magnetically non-ferrous ores such as chalcopyrite ore.
- Publication:
-
Results in Physics
- Pub Date:
- September 2018
- DOI:
- 10.1016/j.rinp.2018.07.027
- Bibcode:
- 2018ResPh..10..837X
- Keywords:
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- Superconducting PHGMS;
- Processing of fine particles;
- Kaolin;
- Chalcopyrite