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黄金科学技术 ›› 2018, Vol. 26 ›› Issue (6): 811-818.doi: 10.11872/j.issn.1005-2518.2018.06.811

• • 上一篇    下一篇

磁化水对膏体料浆管道输送摩阻损失影响试验研究

蓝志鹏(),王新民*(),张钦礼,陈秋松   

  1. 1. 中南大学资源与安全工程学院,湖南 长沙 410083
  • 收稿日期:2017-06-18 修回日期:2017-10-20 出版日期:2018-12-31 发布日期:2019-01-24
  • 通讯作者: 王新民 E-mail:lly2011ustb@126.com;wxm1958@126.com
  • 作者简介:蓝志鹏(1992-),男,福建漳州人,硕士研究生,从事采矿与充填技术研究工作。
  • 基金资助:
    中央高校基本科研业务费专项资金项目“基于不均衡级配多骨料组合安全高效充填技术研究”(编号:2017zzts582)资助

Experiment Research on Magnetized Water’s Effect on Friction Loss of Paste Slurry in Pipeline Transport

Zhipeng LAN(),Xinmin WANG*(),Qinli ZHANG,Qiusong CHEN   

  1. 1. School of Resources and Safety Engineering,Central South University,Changsha 410083,Hunan,China
  • Received:2017-06-18 Revised:2017-10-20 Online:2018-12-31 Published:2019-01-24
  • Contact: Xinmin WANG E-mail:lly2011ustb@126.com;wxm1958@126.com

摘要:

为了探究磁化水对膏体料浆管道输送流变性能的影响,基于自制的L型斜管试验装置,运用正交试验设计法进行了不同磁化条件下膏体料浆自流输送室内物理模拟试验,对试验结果进行优化组合筛选。结果表明:在适宜的磁化条件下,磁化水能够有效改善膏体料浆流变性能,降低料浆屈服应力和塑性黏度,提高膏体料浆管道输送可靠性。与空白组对比,当磁感应强度B=200~300 mT,磁化时间T=15~25 min,水循环流量为0.5~1.5 L/s时,膏体料浆摩阻损失最小,屈服应力降低8%~20%,塑性黏度降低12%~35%。

关键词: 磁化水, 膏体料浆, 摩阻损失, 屈服应力, 塑性黏度, L型斜管, 磁化条件, 正交试验

Abstract:

To explore the influence of magnetized water on rheological properties of paste slurry pipeline conveying,an indoor experiment was carried out.On the basis of self-made L-inclined tube test device,the physical simulation test of gravity flow of paste slurry under different magnetizing conditions was carried out by orthogonal experimental design.The experimental results were optimized and screened in the end.The results show that the rheological properties of paste slurry can be effectively improved by magnetized water.Besides,magnetized water can reduce yield stress and plastic viscosity of slurry with suitable magnetization conditions,which can improve the reliability of slurry pipeline transportation at the same time.Furthermore,contrasting with blank group,when the magnetic induction being 200~300 mT,magnetized time being 15~25 min and cycling rate being 0.5~1.5 L/s,the friction loss of paste slurry is the smallest,the yield stress and plastic viscosity are reduced by 8%~20% and 12%~35% respectively.

Key words: magnetized water, paste slurry, friction loss, yield stress, plastic viscosity, L-inclined tube, magnetization condition, orthogonal test

中图分类号: 

  • TD853

图 1

磁化水制备系统"

图2

L型斜管试验装置"

图3

全尾砂粒径累计分布曲线"

表 1

全尾砂化学成分"

成分 质量分数 成分 质量分数
Cu 0.23 Al2O3 2.06
Pb 0.036 CaO 10.19
Zn 0.064 SiO2 14.28
S 8.50 MgO 4.62
Fe 32.86

表 2

试验材料主要物理性质"

物料名称 密度/(t·m-3 容重/(t·m-3 孔隙率/%
全尾砂 3.07 1.13 60.20
普通硅酸盐水泥 3.10 1.30 58.00

表3

试验因素水平"

水平 因素
A B C
1 0.5 5 150
2 1.5 15 250
3 2.5 25 350

表4

正交设计试验方案"

组别 A B C 试验方案ABC
1 1 1 1 A 1 B 1 C 1
2 1 2 2 A 1 B 2 C 2
3 1 3 3 A 1 B 3 C 3
4 2 1 2 A 2 B 1 C 2
5 2 2 3 A 2 B 2 C 3
6 2 3 1 A 2 B 3 C 1
7 3 1 3 A 3 B 1 C 3
8 3 2 1 A 3 B 2 C 1
9 3 3 2 A 3 B 3 C 2

图 4

试验流程"

表 5

L型斜管试验数据"

组别 料浆密度(ρ)/(kg· m - 3 料浆高度/m 时间/s 料浆质量/kg
? H 1 ? H 2 t 1 t 2 M 1 M 2
KB 1952 1.441 1.387 8.9 7.7 3.452 3.680
1 1952 1.346 1.375 6.1 5.6 4.286 4.376
2 1952 1.413 1.393 4.3 4.7 5.420 5.641
3 1952 1.329 1.315 6.8 7.4 5.190 5.372
4 1952 1.364 1.362 4.2 3.8 6.525 5.874
5 1952 1.253 1.337 3.2 2.7 9.981 10.020
6 1952 1.238 1.241 2.8 3.5 7.550 9.510
7 1952 1.385 1.389 4.9 5.2 5.890 6.320
8 1952 1.350 1.353 3.5 4.2 7.020 8.490
9 1952 1.249 1.256 5.1 4.4 8.630 7.630

表 6

不同试验组膏体料浆流变参数"

组别 循环水流量(Q)/(L·s-1 磁化时间(T)/min 磁感应强度(B)/mT

流速( v 1 )/

(m·s-1

流速( v 2 )/

(m·s-1

屈服应力 ( τ o )/Pa 塑性黏度 ( η ) / ( P a ? s )
KB - - - 0.125 0.101 62.776 0.061
1 0.5 5 150 0.204 0.183 57.351 0.048
2 0.5 15 250 0.313 0.329 54.370 0.041
3 0.5 25 350 0.190 0.199 51.262 0.047
4 1.5 5 250 0.404 0.406 55.931 0.052
5 1.5 15 350 0.969 0.814 52.530 0.035
6 1.5 25 150 0.709 0.704 54.644 0.048
7 2.5 5 350 0.317 0.314 52.552 0.041
8 2.5 15 150 0.528 0.524 59.473 0.058
9 2.5 25 250 0.453 0.442 53.831 0.039

表 7

影响因子极差分析结果"

指标 特征项 水平值 A B C
屈服应力( τ o )/Pa 均值 1 54.33 55.28 57.16
2 54.37 55.46 54.71
3 55.29 53.25 52.11
极差 R 0.96 2.21 5.04
塑性黏度( η ) / ( P a ? s ) 均值 1 0.045 0.047 0.051
2 0.045 0.045 0.044
3 0.046 0.045 0.041
极差 R 0.001 0.002 0.010

图5

试验因子对料浆屈服应力的影响"

图 6

试验因子对料浆塑性黏度的影响"

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