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高浓度煤浆采用液压冲压机固结,直至达到力学平衡状态。挤压力在350×10~5Pa时,物料可达到的最终孔隙比随挤压力加大而呈近似对数关系连续减小。固结速度却随挤压力增加而加快,经固结的物料再以低于50×10~5Pa的气压差脱水。这种方法比纯气压差脱水法的最终水分更低。用挤压和气压差组合工艺脱水时,最终水分受压力的影响不大,仅取决于所用气压差的大小。本文描述了煤泥在该阶段中的压缩模型。随着挤压力增加,各颗粒间的间隙先减小,随后孔径最大亦最不稳定的孔隙被破坏。机械脱水物料的气耗量随挤压力上升而下降,又随气压差加大而上升。
High concentration of coal slurry using hydraulic press consolidation until mechanical equilibrium state. When the extrusion pressure is in the range of 350 × 10 ~ 5Pa, the ultimate void ratio of the material decreases continuously with the increase of the extrusion pressure. Consolidation speed increases with the extrusion pressure and speed up, the consolidation of the material and then less than 50 × 10 ~ 5Pa pressure difference between the dehydration. This method is lower than the final moisture of pure air pressure dehydration method. With the combination of extrusion and pressure difference dehydration process, the final moisture is not affected by the pressure, only depends on the size of the pressure difference used. This paper describes the compression model of slime in this stage. As the extrusion force increases, the gap between the particles decreases first, and then the pores with the largest and the most unstable pore diameter are destroyed. Mechanical dehydration materials, gas consumption decreased with the rise of extrusion pressure, but also with the pressure difference increases.