Boardworks GCSE Science: Chemistry Extracting Metals
2018 10 17 Gold and other unreactive metals occur native . Metals that are found in the ground as uncombined elements do not require further extraction. What methods are used to extract metals? Most metals are found combined with other elements, as compounds in ores. These metals need to be separated from the other elements that they are combined with using
Gold Extraction & Recovery ProcessesHTTPS
2016 2 29 For gold extraction the strength of cyanide solution ranges from 0.01 to 0.05%. Lime is added to the process in order to have a pH near to 10 11. The different minerals foreign substances can affect the cyanidation process in a number of different ways. Silver is usually present with gold either in small or high amounts.