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铸造旧砂具有一定粘性,含水量达2～3％,平均温度90～110℃,并有大量的蒸气。这种物料能否采用气力输送呢?通过上海缝纫机二厂10年来的生产实践证明:采用以罗茨鼓风机为气源的低压压送式气力输送装置,不仅能满足15吨/时的输送生产率,而且在输送过程中具有旧砂的冷却、再生、除尘作用。这对提高型砂质量,提高铸件成品率,改善劳动条件,均有良好的效果。本文介绍了低压压送式气力输送装置的输送原理、主要参数的选择和计算以及主要部件结构的设计及选用、除尘设备的设计及选用、压力损失计算等内容。
Foundry sand has a certain viscosity, moisture content of 2 to 3%, the average temperature of 90 ~ 110 ℃, and a lot of steam. This material can be used pneumatic conveying it? Through Shanghai Sewing Machine Plant 10 years of production practice has proved: the use of Roots blower as the gas source of low-pressure pneumatic conveying device, not only to meet the 15 tons / hour delivery productivity, And in the transportation process with the old sand cooling, regeneration, dust removal. This is to improve the sand quality, improve casting yield, improve working conditions, have good results. In this paper, the principle of conveying, the selection and calculation of main parameters, the design and selection of the main components, the design and selection of dust removal equipment and the calculation of pressure loss are introduced.