Abstract: Sintering dust was used as experimental powder material in a double-tube-socket pneumatic conveying system with 200 m long and 100 mm in diameter to study its pneumatic conveying characteristics. Based on its movement characteristics and pressure gradient trend along the conveying direction, the pipeline could be divided to developing, transition and developed sections. In the research range, the lowest pressure gradient of the trend curve was 1.071 kPa/m, and the highest pressure gradient 1.616 kPa/m. The highest dust flow rate was 33 t/h, the highest flow rate ratio of dust to air 36, and the lowest power consumption about 2.6 kW×h/(t×km).

Key words: pneumatic conveying, double-tube-socket, transport characteristic, sintering dust

摘要： 在长200 m、管径100 mm双套管气力输送系统实验台上进行了烧结除尘灰输送实验，考察了其输送特性. 根据所得输送压力梯度特点可将管道分为起始段、过渡段与充分发展段. 在研究范围内，烧结灰输送压力梯度最低值为1.071 kPa/m，最高值为1.616 kPa/m，质量流率最高值为33 t/h，物料流率/气流流率最高值约为36，能耗最低值约为2.6 kW×h/(t×km).

关键词: 气力输送, 双套管, 输送特性, 烧结除尘灰