vase rafineerimisprotsess sulatusprotsessi lõpustaadiumis vase oksiidide taandamise eesmärgil; taandajatena kasutatakse gaase, nt maagaasi, ammoniaaki jms
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Minevikus kasutati vase rafineerimiseks toorest puidust palkide sisestamist sulavaske, mille käigus eralduv veeaur ja süsivesinikud tagasid metallist hapniku, samuti väävligaaside eraldumise.
a metallurgical reduction method employed in the purification copper which contains copper oxide as an impurity; in reduction is primarily involved reducing gas mixtures, normally natural gas, ammonia etc
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In the past freshly cut trees were used as wooden poles. It was the use of these greenwood poles gave rise to the term "poling".
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