The unit treats zinc ores called sulphide of zinc to extract from zinc metal to 99,995 %, cadmium, copper and The zinc ore is oxidized in a fluidized-bed furnace. This oxidation gives zinc oxide and a gas (sulphur dioxide) which after purification is transformed into sulphur trioxide then in This oxidation also gives place to heat which is recovered in the form of vapor high pressure to make turn a turboalternator for the production of electrical energy of 2,2 MW. to obtain a zinc sulphate s...