zinc

13.06.18 APSC (Assam) Current Affairs

ASSAM   Centre plans to set up coach maintenance facility in State   The Railway Ministry is considering setting up a coach maintenance facility in Assam.   It is noteworthy that a Coach Refurbishment Unit was approved at Bongaigaon last year with an investment of Rs 150 crore for daily upkeep of new-generation LHB coaches. … Read more

Metallurgy 2

Metallurgy 2 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 … Read more