incidental to air transport cargo handling incidental to land transport cargo handling incidental to water transport casting of non-ferrous metals central banking charters, excursions and other occasional coach services cleaning of industrial machinery cleaning of trains buses, planes etc. cleaning,...
incidental to air transport cargo handling incidental to land transport cargo handling incidental to water transport casting of non-ferrous metals central banking charters, excursions and other occasional coach services cleaning of industrial machinery cleaning of trains buses, planes etc. cleaning,...
must be reduced either chemically or electrolytically . in general, the ore is first broken up through crushing and grinding, to generate small particles. the particles that are mostly valuable are then separated from those that are mostly waste. various separation techniques are employed to concentrate...
(in the form of lumps, pellets or fines) by a reducing gas produced from natural gas or coal . the reducing gas is a mixture majority of hydrogen (h ) and carbon monoxide (co) which acts as reducing agent. this process of directly reducing the iron ore in solid form by reducing gases is called direct...