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钼精矿的干燥,我国在五十年代中期开始以间接加热式圆筒干燥机取代了干燥坑。圆筒干燥机的优点是生产能力大,间接加热与直接加热式圆筒干燥机相比金属损失小,並可避免煤灰对精矿的污染,但热效率比直接加热式圆筒干燥机低。由于钼精矿在选矿过程中吸附大量的煤油和二号油等易燃易爆的油类,因此,采用这种温度比较高的干燥机来干燥钼精矿在生产中存在着不少问题,比较严重的是经常发生放炮和着火,当温度达到230℃以上时,随时都有可能发生。为了防止放炮着火给生产
Molybdenum concentrate drying, our country in the mid-fifties began to indirect heating cylinder dryer to replace the drying pit. Cylinder dryer has the advantage of large production capacity, indirect heating and direct heating cylinder drier compared to metal loss is small, and to avoid the pollution of the concentrate on the coal ash, but the thermal efficiency is lower than the direct heating drum dryer. As the molybdenum concentrate absorbs a large amount of flammable and explosive oils such as kerosene and the second oil during the beneficiation process, there are a lot of problems in the production of the molybdenum concentrate by using this dryer with a higher temperature, More serious is the regular occurrence of fire and fire, when the temperature reaches 230 ℃ above, at any time may occur. In order to prevent the firing of fire to production