sulphide ore

Metallurgy concentration, roasting, smelting Roasting It is a process wherein the ore is heated either alone or with some other material in excess of air below the fusion point of the ore. Usually, this method is used for sulphide ores. In roasting, definite chemical changes take place to form oxide or chloride of the metal. Ores of metals like zinc, lead, copper and nickel, when roasted in air, are converted to their oxides. Ores of some metals like lead may get partially oxidized and converted to sulphate. In such case, it is called sulphating roasting or partial roasting. Ores of ... Read more

 Refining of ores Metallurgy Metallurgy Metallurgy is the process of obtaining metals from ores. It may be defined as the processes which are involved in the extraction of metals from their ores and then refining them for use are known as metallurgy. Steps of Metallurgy: Metals can be extracted from their ores by following processes: Enrichment of ore or Concentration of Ore Conversion of concentrated ore into metal oxide Reduction of metal Oxide to metal Purification or Refining of Impure metal   ENRICHMENT OF ORE OR CONCENTRATION OF ORE   Before extracting the metal from an ore, it is necessary to remove ... Read more