Cobalt-containing catalyst waste leaching method

Abstract

The invention relates to the technical field of cobalt hydrometallurgy, in particular to a cobalt-containing catalyst waste leaching method. The cobalt-containing catalyst waste leaching method comprises the following steps that (1), smashing is carried out on cobalt-containing catalyst by adopting a jaw crusher, the crushing time is 10 min, and 50 g of cobalt-containing catalyst waste which is subjected to ball milling and passes through a 50-mesh sieve is taken; (2), the waste is put into a 3L beaker, and 1000mL of water is added for slurrying; (3), heating is carried out in a water bath kettle at the temperature of 60 DEG C, uniformly stirring is carried out by adopting magnetic stirring, sulfuric acid with the mass concentration of 1.84 g / cm < 3 > into the slurry, the pH value is adjusted to be 0.5-1.5, and reacting for 30 min is carried out; (4), 60-100mL of oxidizing agent is slowly added into the slurry, and a small amount of concentrated sulfuric acid is added in the process, so that the pH value of the solution is stabilized at 0.5-1.5, and after the pH value is maintained to be stable, reacting for 60 min is carried out; and (5) after solid-liquid separation is carried out, a leaching solution and leaching residues are obtained, and washing is carried out on the obtained leaching residues by using 1-2 mol / L dilute sulphuric acid.

Description

technical field [0001] The invention relates to the technical field of cobalt hydrometallurgy, in particular to a method for leaching cobalt-containing catalyst waste. Background technique [0002] As a key functional element in lithium-ion batteries, cobalt has a very important strategic position. However, my country's cobalt resources are very scarce, and most of the cobalt resources mainly rely on imports from abroad, resulting in a huge demand for cobalt in my country. Although my country is facing the problem of lack of cobalt resources, there are many cobalt-containing products processed in my country. These cobalt products are rich in cobalt elements. Reasonable development and utilization of cobalt elements in these waste cobalt products can greatly reduce my country's demand for foreign cobalt. Therefore, the rational development and utilization of cobalt in waste cobalt-containing products can improve the current situation of shortage of cobalt resources in my coun...

AI Technical Summary

Problems solved by technology

[0003] Chinese patent CN202010395129.2 discloses a treatment method for cobalt intermediate products. Concentrated sulfuric acid is used for acid dissolution, and the pH is stabilized at 1 to 1.5. Hydrogen peroxide is added for reduction leaching, and the cobalt leaching rate of cobalt intermediate products can reach 99.9%. The method is only aimed at the cobalt intermediates that are easier to leach, and the method is difficult to leach and filter, and it is difficult to leach the cobalt raw materials that are difficult to leach, and the cobalt leaching rate is low

Images