鉱物処理

[2P0102-09-06] コバルト・リッチ・クラストからの金属回収に関する研究

○李 承恩¹、ドドビバ ジョルジ¹、藤田 豊久¹ (1. 東京大学)

キーワード：コバルト・リッチ・クラスト、金属回収

With the improvement of technology, the demand of critical metals increasers yearly. Cobalt-rich ferromanganese crust can be one of the potential resources for these metals, because it contents more valuable metals like molybdenum (Mo), nickel (Ni), cobalt (Co), etc. than most of other existing ores. However, in order to achieve high purity for industrial usage, most of previous researches focus on leaching which apply acid or base to extract valuable from cobalt-rich ferromanganese crust. Without proper treatment, waste acid or base from those processes can have negative impacts to the environments. To solve this problem, magnetic separation is proposed in this study to see if it is feasible to apply magnetic separation methods on valuable metals separation from cobalt-rich ferromanganese crust in the future.



Addition to particle size and magnetic level, this study also considers some pretreatment like heating (300℃) in order to change the physical properties of compounds. As the result, it is found that iron can be potentially removed by applying low magnetic level. On the other side, removal rate is slightly better after samples are heated at 300℃. However, the valuable metals still do not tend to concentrate on either tailing or concentrate. The cause could be the liberation rate of target metals are not liberated yet after grinding. For this reason, the future works of this study will be producing finer particles and adjust heating temperature to maximize grades and recovery of valuable metals by magnetic separation.