高浓度混合骨料充填料浆管道输送特性试验研究

吴凡; 杨志强; 高谦

doi:10.3969/j.issn.0258-2724.20200264

高浓度混合骨料充填料浆管道输送特性试验研究

doi: 10.3969/j.issn.0258-2724.20200264

吴凡^1,,
杨志强^{1, 2},
高谦^1, ,

1.
北京科技大学土木与资源工程学院, 北京 100083
2.
金川集团股份有限公司, 甘肃金昌 737100

基金项目: 国家重点研发计划(2017YFC0602903)

详细信息

作者简介:
吴凡（1996—），男，博士研究生，研究方向为充填采矿技术与充填料浆性能，E-mail：wufanUSTB@163.com

通讯作者:
高谦（1956—），男，教授，博士，研究方向为充填采矿技术与固废综合利用，E-mail：gaoqian@ces.ustb.edu.cn

中图分类号: TD853
计量
- 文章访问数: 180
- HTML全文浏览量: 85
- PDF下载量: 10
- 被引次数: 0
出版历程
- 收稿日期: 2020-05-05
- 录用日期: 2021-12-01
- 修回日期: 2020-08-08
- 刊出日期: 2020-09-15

Experimental Study on Pipeline Transport Characteristics of High-Concentration Mixed Aggregate Filling Slurry

WU Fan^1
,,
YANG Zhiqiang^{1, 2},
GAO Qian^{1
, ,}

1.
School of Civil and Resource Engineering, University of Science and Technology of Beijing, Beijing 100083, China
2.
Jinchuan Group Co., Ltd., Jinchang 737100, China

摘要

摘要:
为研究高浓度混合骨料充填料浆管道自流输送规律，利用甘肃某镍矿充填管道输送系统进行工业试验. 首先，通过工业试验获取不同条件下的料浆管输阻力，并分析了管输阻力与料浆流速、料浆浓度与石粉掺加量的关系；然后，基于变量相互独立的性质假设建立了管输阻力数学模型，同时探讨了管输阻力影响因素的交互作用大小；最后，通过流变试验及机理研究对管输阻力结果进行验证分析. 研究结果表明：管输阻力随料浆流速与浓度增加分别呈线性与幂函数增长趋势，与石粉掺加量呈现先减小后增大的抛物线变化规律，石粉掺加量为30%时对应的管输阻力最小；管输阻力影响因素的交互作用从大到小依次为料浆浓度与流速、石粉掺加量与流速、石粉掺加量与料浆浓度，管输阻力变化范围分别为2070～6920、2180～5970、3140～5530 Pa/m；流变参数随料浆浓度与石粉掺加量的增加分别呈增加和先减小后增大的变化趋势，验证了管输阻力的变化规律；流速的振动效应、浓度的黏稠作用与石粉的絮网理论是改变浆体流变特性与管道输送阻力的原因.
- 高浓度 /
- 混合骨料 /
- 管输阻力 /
- 流速 /
- 流变特性
Abstract:
In order to study the pipeline gravity transport law of high-concentration mixed aggregate filling slurry, an industrial test was carried out using the filling pipeline transport system of a nickel mine in Gansu Province. Firstly, the pipeline resistance of slurry under different conditions was obtained through industrial test, and the relationships between pipeline resistance and slurry velocity, slurry concentration and content of stone powder were analyzed. Then, based on the assumed independent nature of variables, a mathematical model of pipeline resistance was established, and the interaction of influencing factors of pipeline resistance was discussed. Finally, the results of pipeline resistance were verified and analyzed by rheological test and mechanism research. The results show that the pipeline resistance increases linearly with the slurry velocity, increase as a power function with the slurry concentration, and decreases first and then increases, namely in parabolic fashion, with the addition of stone powder. When the stone powder content is 30%, the pipeline resistance is the minimum. Interacted influencing factor pairs of pipeline resistance, ranked by interaction from large to small, are slurry concentration and flow velocity, stone powder content and flow velocity, and stone powder content and slurry concentration, resulting in the pipeline resistance varies in range of 2070−6920, 2180−5970, and 3140−5530 Pa/m, respectively. In addition, the rheological parameters increase with the increased slurry concentration, and decrease first and then increase with the increase of stone powder content, which verifies the variation law of pipeline resistance. The reasons for the change of slurry rheological characteristics and pipeline resistance include the vibration effect of flow velocity, the viscous effect of concentration and the flocculation theory of stone powder.
- high concentration /
- mixed aggregate /
- pipeline resistance /
- flow velocity /
- rheological properties

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图 1 管道输送试验系统

Figure 1. Experimental system of pipe transportation

下载: 全尺寸图片幻灯片

图 2 骨料级配曲线

Figure 2. Grading curves of aggregates

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图 3 压力变化曲线

Figure 3. Pressure variation curves

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图 4 不同料浆浓度下管输阻力与流速的关系

Figure 4. Relationships between transport resistance and flow velocity of slurry pipes for different slurry concentrations

下载: 全尺寸图片幻灯片

图 5 不同石粉掺量料浆管输阻力与流速的关系

Figure 5. Relationships between transport resistance and flow velocity of slurry pipes for different stone powder contents

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图 6 管输阻力与石粉掺量的关系

Figure 6. Relationship between pipeline transportation resistance and contents of stone powder

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图 7 不同因素对管输阻力的交互作用

Figure 7. Interaction of different factors on pipeline transportation resistance

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图 8 不同质量浓度的料浆流变参数

Figure 8. Rheological parameters of slurry with different mass concentrations

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图 9 不同石粉掺量的料浆流变参数

Figure 9. Rheological parameters of slurry with different stone powder contents

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图 10 絮网结构变化示意

Figure 10. Schematic chart of flocculation network structure change

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表 1 工业试验方案

Table 1. Industrial test plans

试验
编号水泥添
加量/(kg•m⁻³) 料浆
浓度/% c/%

A1 310 79 20
A2 310 80 20
A3 310 81 20
A4 310 82 20
B1 310 80 0
B2 310 80 10
B3 310 80 30
B4 310 80 40

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