三菱法连续吹炼冶金学

Practical metallurgy for continuous converting in the Mitsubishi process

三菱工艺的吹炼炉(C炉)提供了从熔融冰铜中连续产出粗铜的机会。连续吹炼的基础是控制CaO-FeO_x-Cu_2O系铁酸钙炉渣中磁性氧化铁行为的可靠技术。C炉作业控制的最新进展包括反映次生氧化物对磁性氧化铁行为影响的炉渣控制。尽管以前的研究集中于磁性氧化铁的行为,但是,硫对C炉的操作也有影响,因为硫对于避免硫酸钙从铁酸钙炉渣中沉淀出来以及冰铜与粗铜的分离有实际的重要影响。本文定量描述了硫酸钙的形成以及冰铜分离时硫在C炉中的行为,并且讨论了C炉操作的更佳控制。

The Converting Furnace（C-furnace） of the Mitsubishi process has solely provided opportunities for producing blister copper continuously from molten matte. Continuous converting originates from the proven technology for controlling the behavior of magnetite in lime-ferrite slag of the Ca0-Fe0x-Cu20 system. Recent improvements in the C-furnace operation have included the slag controls reflecting the impact of minor oxides on magnetite behavior. Although previous investigations focused on magnetite behavior, sulfur has also affected the C-furnace operation because it is of practical importance to avoid the precipitation of gypsum from lime-ferrite slag and the separation of matte from blister copper. This paper will quantify the behavior of sulfur in C-furnace with respect to the gypsum formation and matte separation, and discuss better controls for C-furnace operation.