在高炉锰铁生产中常出现这种情况,当不同炉子的炉温和碱度相同或大致相同时,渣中MnO含量却大不相同(见表1)。通过计算发现,炉温之间、碱度之间的标准偏差 This is often the case in blast furnace ferromanganese production, where the MnO content of the slag is quite different when the furnace temperatures and alkalinity are the same or about the same for different furnaces (see Table 1). Through calculation, we found that the standard deviation between the furnace temperature and alkalinity