David Menne's Gold Metallurgy  
   Information on gold metallurgy and process modelling: grinding and milling, beneficiation and concentration, cyanidation, CIP, CIL, acid washing, elution, regeneration, electrowinning and smelting
   http://users.wantree.com.au/~menne/aumet.htm

Center for Advanced Mineral and Metallurgical Processing (CAMP)  
   Engineering, consulting, research, development, and test facility focused on providing high quality solutions to industrial clients world wide.
   http://www.mtech.edu/CAMP

Zinc Metallurgy  
   Information on Zinc Metallurgy.
   http://prchandna.tripod.com/zinc.htm

Minerals Engineering Conferences  
   Conferences and symposia for leading academics, researchers and industrialists from around the world, to discuss the latest developments in mineral processing and extractive metallurgy.
   http://www.min-eng.com/mec.htm

DocCopper's Copper Processing Page  
   An introduction to the processing of ore or scrap to pure copper. Both pyrometallurgical and hydrometallurgical methods are discussed.
   http://doccopper.tripod.com/copper/cuewer.html