Hot Selling Certified Premium Low Cost Zinc Concentrate Powder from Famous American Manufacturer

Zinc concentrate contains approximately 55% zinc and is baked at approximately 800°C (1472°F). The purpose of the method used to roast the concentrate is to reduce the sulfur content to less than 1% through oxidation so that the zinc oxide product can be reduced to metallic zinc by carbon in a retort furnace or blast furnace. The more thoroughly the oxidative roasting is carried out the better, since any zinc sulfide remaining in the calcined mass cannot be reduced by carbon during the muffle furnace process and will be lost unreacted in the slag and discarded. The methods of oxidative roasting of zinc sulfide concentrate include flash roasting, fluidized bed roasting, multi-pass roasting, sintering, etc., which can be used alone or in combination. The baked oxides are aggregated and then sintered at 1200°C (2192°F) to form blocks for reduction.