Hebei Messi Biology Co., Ltd. stated that the efficient cobalt extraction process with activated magnesium oxide involves a method for efficiently recovering cobalt from low-grade cobalt ore, which is suitable for application in the mining and metallurgy industry.
Cobalt is an important material for manufacturing high-temperature resistant alloys, hard alloys, catalysts, new energy vehicle batteries and strong magnetic materials. It is one of the important strategic mineral resources in the world. As of the end of 2016, the world’s proven cobalt resources were about 25 million tons and the reserves were 7.2 million tons. The total reserves of the three countries of Congo (DRC), Australia and Cuba accounted for 69.4% of the world’s total reserves, especially the cobalt reserves of Congo (DRC) as high as 3.4 million tons, ranking first in the world. China’s cobalt resource reserves are only 80,000 tons, accounting for 1.1% of the global reserves. From the basic law of mineral resource consumption, the demand for cobalt will continue to rise, and the constraints of resource shortages will continue to increase. At present, many cobalt mines at home and abroad have entered the late stage of mining, and the rich and easy-to-select mineral resources are almost exhausted, but there are still a large number of low-grade cobalt resources that have not yet been developed and utilized. Therefore, how to efficiently and economically develop and utilize such low-grade cobalt resources is of great significance to alleviate the prominent contradiction between the supply and demand of high-quality cobalt ores and increase the guarantee period of cobalt resources.
In recent years, scholars at home and abroad have done a lot of research on the recovery of cobalt from cobalt mines and have achieved phased results. With the increasing reduction of global mineral resources and the inherent deficiencies of existing low-grade cobalt ore processing technology, it is particularly urgent and significant to seek a method for efficiently recovering cobalt from low-grade cobalt mines.
In order to overcome the shortcomings of existing technologies, a new type of active magnesium oxide efficient cobalt extraction process was studied, which can not only efficiently recover cobalt from low-grade cobalt mines, but also reduce the recovery cost and is easy to implement, providing broad space and technical support for the development of low-grade cobalt mines. The task of the present invention is accomplished by the following technical scheme: a method for efficiently recovering cobalt from low-grade cobalt ore, which adopts a combined process including leaching-iron removal-manganese removal-two-stage cobalt precipitation with the aid of self-produced cobalt precipitation slag and a two-in-one oxidant to obtain qualified cobalt hydroxide, thereby realizing the utilization of low-grade cobalt ore resources.