The most commonly available ore used in the extraction of Zinc is called Zinc Blende also known as Zinc Sulphide ZnS . Historically extraction of zinc has been more difficult than extraction of other metals because at temperatures where metals such as iron typically begins to melt, zinc is a gas.
Extraction of Zinc Zinc blende is concentrated by floath floatation process. The pulverized ore is kept in large tank containing water and pine oil. The mixture is agitated by passing compressed air.
Extraction and uses of Zinc
Extraction of Zinc. May 2015; DOI: 10.13140/RG.2.1.1479.5687. Join ResearchGate to discover and stay up-to-date with the latest research from leading experts in Extraction and many other
Under optimal extraction conditions, the zinc extraction in one stage was above 92.4% and the separation coefficient βZn/Fe could reach 273 with initial zinc concentration 17.6 g/L, iron concentration 141.1 g/L and H = 1.4 M. The zinc extraction mechanism was analyzed FT-IR spectroscopy and slope method.
Zinc: The important ores of Zinc are Zinc blende, Z n S Calamine, Z n C O 3 Zincite, Z n O The extraction of zinc blende involves the following steps i Concentration: The ore is crushed and then concentrated by froth-floatation process. ii Roasting: The concentrated ore is then roasted in the presence of excess of air at about 1200K.
Zinc of higher purity can be obtained by electrolysis. Pure zinc rod is used as hode while a block of impure zinc is used as anode. A mixture of ZnSO 4 and dill H 2 SO 4 is used as electrolyte. On passing current impure zinc dissolves and equivalent amount of pure zinc is deposited at hode.
Extraction of zinc Download PDF Info Prior art keywords zinc charge slag reduction molten slag Prior art date 1962-08-20 Legal status The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.