vase rafineerimisprotsess sulatusprotsessi lõpustaadiumis vase oksiidide taandamise eesmärgil; taandajatena kasutatakse gaase, nt maagaasi, ammoniaaki jms
Hea teada
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
Hea teada
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".
