China Nonferrous Metallurgy

The application of ion exchange resin adsorption technology in the recovery of nickel and cobalt in laterite nickel ore leaching solution is still in the research stage. The previous research results showed that the technology is feasible, and the corresponding process conditions were given.Based on the previous experimental research, this article conducted further experiments based on the previous conclusion that the initial pH value of the liquid phase is pH≥3, and the conditions and performance of resin regeneration, and reached a more mature conclusion.Experiments on the influence of pH value on the adsorbcapacity of the resin for each metal show that it is more appropriate to adjust the pH value of the adsorbed solution to 4 before implementing the adsorption process. The experiment of the influence of sodium hydroxide concentration on the regeneration performance of the resin shows that the resin regeneration can be achieved by first desorption with sulfuric acid and then transformation with sodium hydroxide solution. The sodium hydroxide concentration of the transformation solution used is 5%.The resin regeneration performance test experiment showed that the resin used in the experiment did not significantly decrease the adsorption capacity of the solution for nickel and cobalt after repeated regeneration.