保德选煤厂北部区加介系统改造

Transformation of medium dosing system of Baode coal preparation plant

针对保德选煤厂北部区原加介系统存在的加介周期长、加介不及时、介耗高等问题,在分析常用加介系统的基础上,设计了一种新加介工艺,并根据保德选煤厂北部区现有工艺系统、设备布置、空间结构提出具体实施方案。改造后,保德选煤厂运行状况良好,增加了重悬浮液浓度,提高加介效率和灵敏度,保证回收率和商品煤质量,降低生产成本。介耗由原来的平均0.62 kg/t降至最低0.21kg/t,降低了66.13%。因加介量减少,且浓介桶始终存有浓介质,一旦发现密度降低,可随时加介,减轻了加介工劳动强度。加介时间由每5 t介质1.57 h降至8 min,降低了91.51%,因密度低造成的分选系统跑煤、回收率低等问题得以有效控制。保德选煤厂每年可多创造效益459.52万元,达到了减员、增效、降耗的目的。

There were lots of problems in Baode coal preparation plant,such as long cycle of medium dosing period,insensitive and poor medium dosing effect.To resolve these problems,the Baode coal preparation plant design a new medium dosing process,provide detailed implement scheme based on the process system,equipment layout,spatial structure of North District.The transformation increase the concentration of dense-medium,medium dosing efficiency and sensitivity.The medium consumption decrease from 0.62 kg/t to 0.21 kg/t,lowering 66.13 percent.Meanwhile,for five tons medium,the dosing period reduce from 1.57 hours to 8 minutes,dropping 91.51 cpercent.The reduction of medium consumption lighten the intensity of labor and increase the production efficiency.The plant increase the benefits by 4.5952× 106 yuan per year.