Tang Mo-tang, etc. On the basis of years of research proposes a new hydrometallurgical method for treating bismuth concentrate - Shen bismuth chloride hydrolysis new law. At a temperature of 36 to 378 K, two-stage circulation leaching is used to greatly improve the leaching recovery rate of ruthenium. Characteristics of the process is the use of an acidic aqueous solution containing metal chloride (A # CA), which combines the advantages of ferric trichloride and chlorine chlorinating agent, to solve the problems in the regeneration and recycling of iron accumulation leachant solution, The concentration of ruthenium in the solution is greatly increased, and the productivity of the subsequent process is correspondingly expanded. The principle process flow is shown in Figure 1.
Figure 1 Process flow chart of the principle of new chlorination hydrolysis
Since it is leached at a high temperature, the oxidizing leaching rate of impurities such as As and S is high, and the side reaction causes an increase in oxygen consumption.
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