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金属矿山 ›› 2011, Vol. 40 ›› Issue (05): 32-35.

• 采矿工程 • 上一篇    下一篇

细粒尾矿充填料浆的流变性及充填能力研究

吕宪俊,金子桥,胡术刚,张磊   

  1. 山东科技大学
  • 出版日期:2011-05-12 发布日期:2011-05-12
  • 基金资助:

    “十一五”国家科技支撑计划项目(编号:2008BAB32B14)。

Study on the Rheological Property and Filling Capacity of the Filling Slurry with Fine Tailings

Lu Xianjun,Jin Ziqiao,Hu Shugang,Zhang Lei   

  1. Shandong University of Science and Technology
  • Online:2011-05-12 Published:2011-05-12

摘要: 以某铁矿细粒尾矿为充填骨料,系统研究了不同浓度充填料浆的塌落度和流动性变化规律,测定了不同浓度充填料浆的粘度和屈服应力。研究结果表明,料浆浓度是影响料浆流动性的关键因素,料浆存在一个临界浓度,料浆浓度大于该临界浓度后,其流动性会急剧降低。对于所用细粒尾矿充填料浆而言,其临界浓度为63%左右;为了保证料浆的流动性,充填料浆浓度应控制在63%以下。采用宾汉姆流体理论,计算了不同浓度充填料浆的管道输送阻力损失及在不同管径下的输送能力。结果表明,在相同充填倍线下,料浆浓度和充填管道直径是影响充填能力和流动速度的主要因素;为保证不同浓度料浆的充填能力,应选择适宜的充填管道直径。  

关键词: 充填料浆, 流变性, 充填能力, 管道设计

Abstract: Taking the fine tailings as aggregated materials,the slump of the filling slurry and its variation regularity of rheological properties with different concentration were investigated,and the plastic viscosity and yield stress of slurry with different concentration were also measured.The results showed that the concentration of slurry is the key factor influencing the slurry's fluidity.With the concentration varied,there is a critical point in fluidity of slurry.When the concentration is higher than the critical concentration,its fluidity can be dropped rapidly.The critical concentration is 63% for such fine tailings slurry.Therefore,the filling concentration must be lower than 63% for a good fluidity.Based on the Bingham fluid theory,the hydraulic gradient and the capacity of the filling slurry in different pipe diameters with different concentration were measured.The results indicated that the slurry's concentration and the pipe diameters are the key factors affecting the filling capacity and the flow velocity in the same filling double line.The suitable pipe diameter must be chosen to ensure the capacity with the different concentration of slurry.

Key words: Filling slurry, Rheological properties, Filling capacity, Pipeline design