应用冲天炉炉缸喷氧技术和局部碱性冲天炉是可行的；
It is feasible to use oxygen injecting into hearth of cupola and cupola with basic lining in some location.
无炉衬冲天炉的特点是炉体除炉缸部分外，不用炉衬，代之以耐热金属材料制成的炉胆；
The liningless cupola is featured by that the furnace shaft, except the hearth section, is not lined but substituted by a heat-exchanging jacket (HEJ)which is made of heat-resistant metal.
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