Converter volume ratio (V/T) refers to the ratio of the volume V (m3) of the free space in the converter cavity to sheet metal charging amount (molten iron + scrap steel + pig iron block unit t).
If the loading amount is too large, the furnace volume ratio will be relatively small, which may lead to increased splashing, increased metal loss, and easy burning of the gun and steel sticking during the blowing process; if the loading amount is too small, the molten pool will become shallow and the furnace bottom will become Due to the strong impact of the oxygen jet on the molten metal, it may be damaged prematurely and even cause steel breakouts.
The furnace volume ratio of large converters is generally between 0.9-1.05m3/t, while the furnace volume ratio of small converters is around 0.8m3/t.
Usually when the converter capacity is small, the molten iron contains high phosphorus, the oxygen supply intensity is high, the number of nozzles is small, or iron ore or laser cutting iron oxide scale is used as the coolant, the upper limit of the furnace volume ratio should be selected. Otherwise, select the lower limit.
Link to this article：The concept of converter volume ratio (V/T) and its impact on the blowing process
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