Improvement of the deleading roasting nickel dust technology of the Joint Stock Company “Kola Mining and Metallurgical Company”

The article deals with the problem of reducing the loss of silver during the deleading of fine kiln dust from the nickel production of the Kola MMC. It has been shown that an increase in the degree of silver recovery is achieved by using sodium sulfate solutions or filtrates of water leaching of dust purified from selenium and tellurium as sulfate-containing reagents at the stage of lead sulfate precipitation. This ensures the subsequent separation of silver and lead by sulfite leaching and the production of selective concentrates.