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焙烧温度的选择和控制是竖炉焙烧球团生产过程中的重要问题,它直接影响着产品的质量和产量。关于赤铁矿球团的焙烧温度,许多书刊中都指出,必须将球团加热到1300℃或更高的温度才能使球团固结。例如Ridgion的研究报告中就提出赤铁矿球团的焙烧固结温度高达1290℃,仅在此温度以上球团抗压强度才能从0.3公斤/球突然上升到500公斤/球,从而在半工业试验中选择1290～1350℃为焙烧温度范围。但是该报告反映的仅是塞拉利昂纯赤铁矿球团焙烧固结的特殊性,对一般赤铁矿,特别是云南上厂地区的酸性泥质
The selection and control of roasting temperature is an important issue in the process of shaft furnace roasting pellets, which directly affects the quality and output of the products. With regard to the calcination temperature of hematite pellets, it has been pointed out in many books that the pellets must be heated to a temperature of 1300C or higher to consolidate the pellets. Ridgion’s study, for example, proposed that the hematite pellets should be roasted and consolidated at temperatures up to 1290 ° C. Only at this temperature would the pellet compressive strength suddenly rise from 0.3 kg / ball to 500 kg / ball, The experiment selected 1290 ~ 1350 ℃ for the calcination temperature range. However, the report only reflects the particularity of roasting and consolidation of the pure hematite pellets in Sierra Leone, which is of great value to the general hematite, especially to the acid mud