大吨位门机适配镍矿作业防粘属具研究

使用抓斗负荷16 t以下门机用于港口镍矿卸船作业的属具和工艺研究较为深入,使用30 t和40 t门机进行卸船时若属具仍旧采用铁矿抓斗,斗容小影响每钩镍矿抓取量并且镍矿严重粘斗,降低了船舶接卸效率,结合公司属具保有情况和镍矿作业适宜斗容,提出了抓斗兼容使用设计思路,在现有属具基础上进行结构改进,使镍矿在斗内淤积现象得到消除,改进后船舶综合作业效率由1 200 t/h左右提高到1 400 t/h以上,最高达到1 583t,使卸载5万t镍矿船舶时间控制在40 h内,提高了在港船舶的周转频率,同时,该改进设计可用于含水量高容易粘斗的铁矿作业中,具有良好的推广应用价值。

Research on Stick Avoiding Instruments of Large Tonnage Gantry Crane in Nickel Ore Discharging

The research on instruments and technology of 16t or smaller gantry crane in nickel ore discharging is extremely intensive. However,30t or bigger crane using iron ore grab in nickel ore discharging would encounter problems. Because of the capacity and ore attachment,efficiency of discharging is particularly low. Considering the actual grabs in Tianjin Port Coke Terminal Corporation and the grab capacity of nickel discharging,the solution of compatible using was proposed. Through the improvement of existing grabs,the problem of stick is eliminated. And the comprehensive discharging efficiency grows from 1200 t / h to 1400 t / h with the maximum efficiency up to 1583 t / h. For example,the maximum discharging time of a ship with 50000 tons nickel ore is 40 hours. In addition,this improvement can be used in iron ore discharging especially when the iron ore is very wet. So the results have a good potential of popularization.