Abstract
The polymetal complex ore Umm-Gheig considered in Egypt as a rather rich source of lead and zinc is subjected to mineralogical, chemical, spectral, X-ray and differential thermal analyses. Hydrometallurgical treatments based on leaching, precipitation and electrodeposition of metal from the ore are established. The influences of current density, temperature and metal ion concentration on the Faradic current efficiency are discussed. Advantages and disadvantages of flow-sheets and various approaches depending on convenient baths for the electrodeposition of metals are investigated. The results of electron microscopic investigation confirmed by metal value data given in the A.S.T.M. cards coincide well with those given by chemical analysis. 18 ref.--AA