宣钢8号高炉第一代大修时，在停炉前对炉底侵蚀深度进行了计算，并确定了残铁口的位置，使停炉后放残铁取得了成功。
The erosion depth in the hearth of No. 8 BF were determined before blow-down in it's 1st relining, and the salamander-taphole was positioned reasonably and the salamander as tapped successfully.
残采的铁铝降低了磷矿的含量。
Residual amounts of iron and aluminum dilute the phosphate content.
蒸酸后残液中的镍、铬、铁等有价金属元素含量可提高一倍以上，为其综合利用奠定了基础。
The content of valuable metal, such as Ni, Cr, and fe in residual liquors can be doubled after evaporation treatment. This will be in favor of the effective use.
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