|About this Abstract
||2020 TMS Annual Meeting & Exhibition
||PbZn 2020: The 9th International Symposium on Lead and Zinc Processing
||Increased Current Efficiency in Zinc Electrolysis in the Cajamarquilla Refinery
||Juliano Alves de Lima, Eder Lúcio de Castro Martins, Gian Piero Pajuelo Gonzales , Tone Takayama Filho
|On-Site Speaker (Planned)
||Tone Takayama Filho
The Cajamarquilla Zinc Refinery is a Metallurgical Unit belonging to Nexa Resources SA, its production capacity is 335kt of refined zinc. It is an integrated Zinc Refinery that processes Zinc concentrates from the route known as RLE (Roasting - Leaching - Electrowinning). The Electrowinning stage is of fundamental importance because it consumes 80% of all electrical energy and this represents 31% of the entire conversion cost. It also restricts the production capacity of the plant.
In the years 2015, 2016 and 2017, there was a significant reduction in the current efficiency of the Electrolysis, impacting the transformation cost and also the production capacity of the Refinery.
This work includes research studies, actions taken to restore performance and stability of the process. At present Cajamarquilla's performance in current efficiency is benchmark against the main world competitors. In addition to presenting the main future developments to increase the competitiveness of the unit.