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从1952年11月直到1979年5月,楚基卡马塔反射炉采用传统的空气-燃料喷嘴(A.F.B.)熔炼生精矿炉料。当第一个制氧车间投产时和直到1986年9月,工厂采用了包括空气-燃料喷嘴(A.F.B.)和氧气-燃料喷嘴(O.F.B.)的混合系统。而后来的多次试验表明,仅用氧气-燃料喷嘴即可收到效益。本文介绍诸如降低油耗、提高炉子熔炼速率及改善冰铜品位和SO_2含量等试验研究的结果。此外,我们发现渣含铜较高、磁铁矿问题、和耐火砖与电能消耗均较高。然而,采用氧气-燃料喷嘴的总平衡表示出积极的效果。
From November 1952 until May 1979, the Chuqui Kata tower furnace used conventional air-fuel nozzles (A.F.B.) to melt raw concentrate charge. When the first oxygen plant was commissioned and until September 1986, the plant employed a hybrid system that included an A.F.B. and O.F.B. Subsequent tests showed that the benefits were only achieved with oxygen-fuel nozzles. This paper presents the results of pilot studies such as reducing fuel consumption, increasing furnace smelting rate, improving matte grade and SO 2 content. In addition, we found higher slag and copper content, magnetite problems, and higher firebrick and electricity consumption. However, the overall balance with oxygen-fuel nozzles shows positive results.