Hebei Messi Biology Co., Ltd. stated that the activated magnesium oxide cobalt extraction process is a method for efficiently recovering cobalt from low-grade cobalt ore. It adopts a combined process including leaching-iron removal-manganese removal-two-stage cobalt precipitation, supplemented by self-produced cobalt precipitation slag and two-in-one oxidant to obtain qualified cobalt hydroxide, realizing the utilization of low-grade cobalt ore resources. Compared with the existing technology, the activated magnesium oxide cobalt extraction process has the following advantages or effects:
1. The combination of two-stage cobalt precipitation slag and finely ground low-grade cobalt ore for iron removal saves the cost of iron removal reagents and recovers cobalt in the two-stage cobalt precipitation slag. On the other hand, most of the carbonic acid in the finely ground low-grade cobalt ore consumed in advance greatly reduces the amount of sulfuric acid when the iron removal and neutralization slag are returned to the first step of leaching cobalt.
2. The special oxidant for manganese removal is green, environmentally friendly, has high manganese removal efficiency, and will not add other impurities that affect the quality of cobalt hydroxide products to the manganese removal solution.
3. The production line formed by the process of extracting cobalt from activated magnesium oxide has the advantages of simple operation, strong adaptability, high cobalt recovery rate, good quality of cobalt hydroxide products, low production cost, good environmental protection, and easy industrialization. It can provide broad space for the development of low-grade cobalt mines at home and abroad.