| 摘要 |
<p>The invention relates to a process for melting and refining copper in a vertical furnace by direct contact of copper pieces with hot gases produced by combustion of a non-solid fuel with an oxygen-containing gas ignited before coming into contact with the copper pieces, the said gas being substantially neutral, the variation around the neutral point being such that the oxygen contents shall be lower than about 0.5 percent of O2 and the hydrogen contents shall be lower than about 0.5 percent of hydrogen, and the pressure being such that the ignited has leaving the burners shall be capable of piercing the liquid mass situated at the level of the burners.</p> |
