Metal refining is the process of purifying metal ores to extract valuable metals. This involves removing impurities and unwanted materials, allowing for the production of high-quality metals. Common methods include smelting, where heat is applied to separate metal from its ore, and electrolysis, which uses electrical currents to separate metals from their compounds. The refined metals can then be used in various applications, such as manufacturing, construction, and electronics. Key metals often refined include gold, silver, copper, and aluminum. The refining process is essential for ensuring that these metals meet industry standards and are suitable for their intended uses.