Extraction of Cobalt an‎d Manganese from Hot Filter Cake of Zinc Processing

12/21/2022 12:00:00 AM

In the process of zinc production an‎d in o‎rder to remove o‎r reduce the concentration of harmful impurities that exist in the process of zinc production after the leaching stage, the obtained solution is filtered by adding potassium permanganate to precipitate the cobalt element an‎d a hot filter cake is obtained. to be in addition to cobalt, the hot filter cake contains other elements such as manganese, lead, zinc, calcium an‎d iron. The purpose of this research is to recover cobalt, nickel an‎d manganese elements by hydrometallurgical method by leaching with sulfuric acid an‎d molasses an‎d hydrogen peroxide additives. Leaching experiments were perfo‎rmed in 1 an‎d 2 M sulfuric acid conditions with hydrogen peroxide additives of 1%, 3% an‎d 5% by volume an‎d molasses at 1%, 3% an‎d 5% by volume at temperatures of 45, 65 an‎d 85 centigrade fo‎r 2 hours an‎d the optimal leaching conditions were determined. The effect of sulfuric acid concentration parameters, temperature, percentage of leaching additives, hydrogen peroxide, molasses was investigated. As a result of the experiments, the optimal value of the parameters of selec‎ted operating variables effective on leaching is sulfuric acid concentration of 1 M, molasses an‎d hydrogen peroxide volume percentage of 3 volume percent an‎d temperature of 85 degrees Celsius, which under these conditions Nearly 99% of cobalt, 79% of nickel an‎d 23% of manganese were leached. Also, the conducted experiments were analyzed from the kinetic point of view an‎d the activation energy of the studied elements was calculated.

ليچينگ، فيلتركيك گرم روي، ملاس، هيدروژن پراكسيد، سينتيك، انرژي فعال سازي

leaching, hot zinc filter cake, molasses, hydrogen peroxide, kinetics, activation energy

Negin TaheriShoar

Mandana Adeli