at last, based on above, the mine-exploiting model, which might made the recycling of titanium among vanadic titanomagnetite best, was figured out by using of optimum principle.
最后,在此基础上,利用最优化原理,建立了使钒钛磁铁矿中钛回收率达到最佳的矿山开采模型。
the upper shaft lining of no . 1 blast furnace for smelting high tio2 bearing vanadic titanomagnetite is repaired by forcing and gunning methods .