落重试验测定矿石粉碎特性参数  

Comminution Parameters Detection of the Ore by Drop-weight Tests

作　　者：王泽红[1] 楚文城 孔令斌[1] 陈超[1] 马琨[1] 

机构地区：[1]东北大学资源与土木工程学院,辽宁沈阳110819

出　　处：《金属矿山》2014年第9期85-89,共5页Metal Mine

摘　　要：为了科学、准确地进行碎磨设备选型,并确定合理的碎磨工艺流程,对国际上较盛行的自磨/半自磨工艺中物料粉碎特性参数的测定方法——JKTech落重试验法进行了系统介绍,在此基础上,采用JK落重试验仪和磨蚀粉碎试验设备,测定了承德某铁矿3个矿样的冲击粉碎参数A和b以及磨蚀粉碎参数Ta。将试验结果与数据库数据比较,可以得出:13个矿样的粉碎特性十分接近,都属于软-中软矿石。2矿样在破碎能为2.5、1.0 kWh/t时,颗粒的抗冲击破碎能力随颗粒粒度的增大而下降,且破碎能越大颗粒抗冲击破碎的能力下降越显著;当比破碎能为0.25kWh/t时,颗粒的抗冲击破碎能力随颗粒粒度的增大而上升,即随比破碎能下降,颗粒粒度-t10关系曲线的斜率变小。3试验结果可以成功用于磨机与破碎机处理量和能耗的计算以及自磨/半自磨流程设计和模拟计算。因此,JKTech落重试验所测得的粉碎特性参数不仅可以判断矿石性质,也可作为设备选型和流程确定的依据。In order to make the selection of comminution equipments and process more accurately and reasonably, the popular material comminution properties measured methods in AG/SAG operation at abroad： the JKTech Drop-weight Test method was introduced systemically. The comminution properties that are the impact parameter A and b as well as abrasion pa- rameter T, in Chengde Iron Ore are determined by using JK Drop-weight Tester and abrasive grinding testing device. By compa- ring the test results with the data in database,it can be seen that ①the three samples＇comminution properties are similar with each other,which meant all the sample belong to the soft and middle-soft ore. ②with the crushing energy of 2.5,1.0 kWh/t, the impact resistance decrease with the increase of the particle size. The more the crushing energy is, the more significant the impact resistance decreases. With the specific crushing energy of 0.25 kWh/h, the impact resistance increase with the increase of the particle size. It means that the impact resistance decrease with the specific crushing energy, and the curve slope of tl0 ＆ particle size becomes less. ③The test results can be successfully applied into calculation of throughput and energy consump- tion,as well as AG/SAG flow-sheet design and simulation. It indicated that comminution properties by JKTech Drop-Weight Test could not only measure the ore properties, but also lay the foundation for equipment selection and flow-sheet determina- tion.

关 键 词：落重试验 粉碎特性参数 自磨 半自磨 

分 类 号：TD921.2[矿业工程—选矿] TD921.4