At present, there are many manufacturers of cobalt extracted from such raw materials in the world. Although the production processes used by each plant are different, they can be roughly divided into two categories according to their production methods: (1) fire pretreatment and preliminary enrichment, followed by wet removal of impurities and extraction of cobalt products; The cobalt-containing product is obtained by treating the cobalt-containing concentrate with a wet process. A representative process overview is selected below for various cobalt-containing materials. 1. Sulfation roasting of cobalt and sulfur concentrates - wet process Due to reasons mineralization, pyrite or pyrrhotite often contain small amounts of nonferrous heavy metals, cobalt, nickel, iron ions replace the iron sulfide minerals are obtained by isomorphous, it is difficult to sorting, multiple output Cobalt-containing pyrite or pyrrhotite concentrate, commonly known as cobalt-sulfur concentrate in China. Cobalt-containing pyrite or pyrrhotite has been used as one of the original cobalt extractions due to the increased demand for cobalt. Before and after the Second World War, it was mostly limited to recovery from pyrite cinder. In the 1950s, various industrialized countries in the world began to study a large number of sulfuric acid roasting-wet treatment processes for cobalt-sulfur concentrates, solving two main problems: (1) effectively separating and making full use of a large amount of iron and sulfur components. Ensure high cobalt extraction rate; (2) Separate and recover cobalt and other metals in the leachate. The measures to solve the problem (a) are modernly recognized as boiling sulphate roasting as well. The methods used by the factories to solve the problem (2) are different. It is useful for the old step-by-step precipitation method of hydrogen sulfide. There is high pressure (NH 3 ) 2CO 3 leaching copper , cobalt precipitation, followed by step-wise distillation of ammonia, and newer solvents. Extraction method, etc. Select three examples below. The sulphation roasting-hydrometallurgical process of cobalt-sulfur concentrate in a factory in China is shown in Figure 1. Figure 1 Process of processing cobalt-sulfur concentrate in a factory The Cocoa Cobalt Plant in Finland is the world's largest plant for the treatment of cobalt and sulfur concentrates. It was completed and put into operation in 1968. Figure 2 shows the flow chart used by the plant. The composition of the raw materials and products is shown in Table 1. In recent years, the granulation-leaching method has also been used to comprehensively treat the alloy produced in the front bed of the Mansfield copper blast furnace to increase the production of cobalt. Table 1 Composition of raw materials and products Figure 2 Flow chart of cobalt-sulfur concentrate processing in Kokola cobalt plant The cobalt-sulfur concentrate and the calcined by the oxidative roasting of the concentrate are calcined at 1: (3~4), and there are two rectangular boiling furnaces, each of which is divided into four compartments, and the calcining is carried out by a belt conveyor. The first chamber flows through the chambers through the lower holes of the partition wall, and finally exits from the fourth chamber overflow port. Conditions for sulphation roasting: The boiling layer is 2 to 2.5 m high and the temperature is 680 ° C. The amount of concentrate added to each compartment is based on the temperature and atmosphere required to maintain sulfation. The plant produced 1,500 tons of cobalt in 1981. The cobalt-sulfur concentrate produced by the Shirakawa Mine in Hokkaido, Japan, contains 0.35% to 0.4% of copper and cobalt, making it the largest source of domestic cobalt in Japan. The production process is shown in Figure 3. The total recovery rates are (%): Co7l, Cu82, S82. Fireproof Container,Pressurized Container,A60 Container,Explosion Proof Container Yangzhou Tonglee Reefer Container Co., Ltd. , https://www.cimctlc.com