in industry an ore is a rock that contains enough metal to make mining and extraction economical. however the value of ores changes over time due to society and technology. for example rocks containing only 5% copper would have been considered unprofitable in the 19th century.
chapter 5.2 extraction of metals from their ores an ore of a metal *metal *minerals *impurities processes of obtaining a pure metal from an ore: mining of the – a free powerpoint ppt presentation (displayed as a flash slide show) on powershow.com - id: 472a8d-ymfjm
presentation summary : extraction of metals metals can be extracted from their ores by electrolysis. electrolysis is an expensive method and is used to extract very reactive metals electrolysis is an expensive method and is used to extract very reactive metals
metallic rock ore where iron is present extraction smelters burn hot with phosphorescence. rivulets of sweat steam hot in the mold splashes in magenta yellow and gold glowing sparks flashing too hot to hold. made for pounding a massive weight forming metal willing fate. power blasted streams engage the injection the mechanism reacts with
aqa mining metal ores ppt and activities. this website and its content is subject to our terms and conditions.
methods of extraction many metals are found in the earth's crust as ores. an ore is usually a compound of the metal mixed with impurities. when the metal is dug up a method must be used to separate the metal from the rest of the ore. this is called extracting the metal. the method of extraction depends on how reactive the metal is. the more reactive the metal the more difficult it is to