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在烧结冷混合料时,水蒸气凝聚在混合料的下部。这种冷凝作用产生了一种所谓前沿水份,其压降减少通过混合料的气流量,影响烧结产量。在一个烧低品位的褐铁矿的烧结厂里,用蒸汽做了预热混合料的试验。蒸汽注入混料园筒里,结果料温明显地超过了50℃。如果将预热温度提高到70℃,便可以在固体燃料的消耗没有显著变化的情况下增加产量16%。如果保持这个预热温度,也可以在节约固体燃料和保持同样烧结产量的情况下将料层高度从40厘米增加到50厘米。每吨烧结矿可以节约6公斤的燃料。产生蒸汽的设备能力和热效率都是令人满意的。
When sintering the cold mix, the water vapor condenses on the lower part of the mix. This condensation produces a so-called leading edge moisture whose pressure drop reduces the gas flow through the mixture and affects the sintering yield. In a sinter plant burning low-grade limonite, steam preheated mixture was used to do the test. The steam is injected into the mixing bowl, with the result that the feed temperature significantly exceeds 50 ° C. Increasing the preheat temperature to 70 ° C increases the yield by 16% without significant changes in the solid fuel consumption. If this preheat temperature is maintained, it is also possible to increase the bed height from 40 cm to 50 cm while saving on solid fuel and maintaining the same sintering yield. Each ton of sinter can save 6 kilograms of fuel. Equipment capacity and thermal efficiency to generate steam are satisfactory.