Asset Report

Onsan zinc smelter

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The zinc smelter located in Onsan, near Ulsan in South Korea is operated by Korea Zinc and has a slab zinc capacity of 560kt/a. The Onsan flowsheet was initially based around a typical zinc smelter configuration of roast-leach-electrowin, however it now also incorporates direct atmospheric leaching of concentrates and also a comprehensive by-products recovery system based around TSL fuming furnaces.

Table of contents

  • Summary
  • Key Issues
  • Emissions
  • 2020
  • 2019
  • 2018
  • 2017
  • 2014
  • 2012
  • 2011
  • Pre-2010
  • 2000-2009
  • 1990-1999
  • 1970-1989

Tables and charts

This report includes 8 images and tables including:

  • Onsan Emission Intensity Quartile Ranking – total global production - tonnes Zn
  • Detailed map
  • Flowsheet
  • Feed Preparation
  • Roaster and Acid Plant
  • Leaching and Purification
  • Tankhouse, Melting and Casting

What's included

This report contains:

  • Document

    Onsan zinc smelter

    PDF 1.68 MB