石圪台选煤厂手选带人工拣矸改造

Modification of manual sorting of waste in Shigetai coal preparation plant

为提高入选原煤质量,减少大块矸石对主选系统的影响,需对原煤进行拣矸作业,目前拣矸作业均由人工完成,存在人工成本高、工作环境差、职业危害重、安全风险高、劳动强度大、拣选效率低等问题。因此,结合智能技术和选煤厂手选拣矸实际情况,利用智能拣矸替换人工拣矸意义重大。基于石圪台选煤厂原煤中>200 mm物料占比4.6%,其中约30%的矸石需要人工拣出,采取现场统计和数值模拟的测算方式,得出实际生产中石圪台选煤厂手选带上矸石粒径约300 mm较多,出现频次约5 s/块,质量约30 kg的物料状态,根据手选带上物料平铺均匀、粒度较大且形状基本规则等特点,充分考虑现场设备空间布置紧凑情况,提出利用图像识别与手选带中部架设拣矸机器人相结合的智能排矸技术替换人工拣矸的可行性方案,实现手选带智能拣矸,进一步推进煤炭分选行业的高质量发展。

In order to improve the quality of washed raw coal and reduce the impact of bulk gangue on the main washing system,it is necessary to pick gangue from raw coal.At present,picking gangue from raw coal is done manually,which has prominent problems such as high labor cost,poor working environment,heavy occupational hazards,high safety risks,high labor intensity and low picking efficiency.Therefore,combining the intelligent technology and the actual situation of hand-picking gangue from coal preparation plants.It is of great significance to replace hand-picked gangue with intelligent sorting.It is in good Shigetai coal preparation plant in practice that coal with coal diameter of 300 mm,frequency of 5 s/piece and weight of 30 kg is good through field statistics and numerical simulation based on 4.6%of coal with coal above 200 mm.According to the features of hand sorting belt,such as uniform material layout,large particle size and regular shape,and taking full account of the compact space arrangement of on-site equipment,a feasible scheme is proposed to replace manual sorting of gangue by using the intelligent gangue dumping technology,which combines image recognition and a sorting robot set up in the middle of the hand sorting belt,so as to realize intelligent sorting of gangue in the hand sorting belt and further promote the high-quality development of the coal washing and sorting industry.