RECYCLING OF ELECTRONIC SCRAP AND OPTIMIZATION OF GOLD RECOVERY

摘要

The possibility for recycling the mixed electronic scrap containing gold is verified by the hydrometallurgical process. A technological scheme is developed and gold solution is obtained from which gold is precipitated by means of three types of precipitants. The degree of leaching and purity of the metal after melting are determined. It has been found that the use of FeSO_4 as a precipitant has certain technological and economic advantages over C_6H_4(OH)_2 and Na_2S_3O_5. Based on the results, the obtained method for gold recovery with a precipitant FeSO_4 is applied for recycling of integrated circuits. The resulting degree of leaching is 99.0% and the obtained gold has a high purity - 99.8%.