超细全尾砂似膏体长距离自流输送的时变特性

doi:10.12068/j.issn.1005-3026.2016.07.028

东北大学学报:自然科学版 ›› 2016, Vol. 37 ›› Issue (7): 1045-1050.DOI: 10.12068/j.issn.1005-3026.2016.07.028

超细全尾砂似膏体长距离自流输送的时变特性

李帅，王新民，张钦礼，王石

(中南大学资源与安全工程学院，湖南长沙410083)

收稿日期:2014-11-21 修回日期:2014-11-21 出版日期:2016-07-15 发布日期:2016-07-13
通讯作者: 李帅
作者简介:李帅(1989-)，男，河南邓州人，中南大学博士研究生；王新民(1957-)，男，安徽安庆人，中南大学教授，博士生导师；张钦礼(1965-)，男，山东临朐人，中南大学教授，博士生导师.
基金资助:
国家科技支撑计划项目(2013BAB02B05)；中南大学中央高校基本科研业务费专项资金资助项目(2015zzts078).

Time-Varying Characteristic of Paste-like Super-Fine Unclassified Tailings in Long Self-Flowing Transportation

LI Shuai， WANG Xin-min， ZHANG Qin-li， WANG Shi

School of Resources and Safety Engineering， Central South University， Changsha 410083， China.

Received:2014-11-21 Revised:2014-11-21 Online:2016-07-15 Published:2016-07-13
Contact: LI Shuai
About author:-
Supported by:
-

摘要/Abstract

摘要： 基于H-B流变模型和絮网结构理论，构建了考虑时变性的超细全尾砂似膏体流变模型，探究超细全尾砂似膏体长距离管道自流输送过程中的时变特性，推导了相应的管输阻力计算公式.以某深井铁矿质量分数为68%的超细全尾砂似膏体为例，进行了室内剪切试验和管输阻力计算.结果表明:不同剪切速率下的超细全尾砂似膏体表现出剪切稀化的时变特性，且剪切速率越大，达到平衡状态的时间越短，黏度值越低.在流量为80m³/h时，管输阻力经225s降至稳定状态的5.03MPa/km，为初始阻力的50.6%.超细全尾砂似膏体长距离自流输送过程中，以稳定状态的阻力损失进行计算更为经济合理.

关键词: 时变特性, H-B流变模型, 絮网结构理论, 管输阻力损失, 剪切稀化

Abstract: A time-dependent rheological model was built based on the H-B rheological model and the slurry flocculent structure theory. Time-varying characteristic of paste-like super-fine unclassified tailings in long self-flowing transportation was explored， and the friction loss formula of pipes was derived. By using the 68% mass concentration paste-like slurry of a deep iron mine， groups of shear rheological tests were implemented， and the pipes friction loss was verified. It is revealed that the paste-like super-fine unclassified tailings show obvious shear thinning under different shear rate. The higher the shear rate is， the faster the balance can be reached and the lower the viscosity is. With a flow of 80m³/h， the friction loss takes 225s to reach a stable value of 5.03MPa/km， which is just 50.6% of the initial resistance. Therefore， it is quite economic and reasonable to calculate the friction loss of paste-like slurry by using the stable value in long distance pipeline transportation.

Key words: time-varying characteristic, H-B rheological model, flocculent structure theory, friction loss of pipes transportation, shear thinning

中图分类号:

TD05

李帅，王新民，张钦礼，王石. 超细全尾砂似膏体长距离自流输送的时变特性[J]. 东北大学学报:自然科学版, 2016, 37(7): 1045-1050.

LI Shuai， WANG Xin-min， ZHANG Qin-li， WANG Shi. Time-Varying Characteristic of Paste-like Super-Fine Unclassified Tailings in Long Self-Flowing Transportation[J]. Journal of Northeastern University Natural Science, 2016, 37(7): 1045-1050.

参考文献

[1]吴爱祥，刘晓辉，王洪江，等.考虑时变性的全尾膏体管输阻力计算［J］.中国矿业大学学报，2013，42(5):736-740.(Wu Ai-xiang，Liu Xiao-hui，Wang Hong-jiang，et al.Calculation of resistance in total tailings paste piping transportation based on time-varying behavior［J］.Journal of China University of Mining & Technology，2013，42(5):736-740.)
[2]Boger D V.Rheology of slurries and environmental impacts in the mining industry［J］.Annual review of Chemical and Biomolecular Engineering，2013，4:239-257.
[3]Pornillos E U.A technique for measuring the reduction of yield stress of thickened tailings［C］ //Jewell R，Fourie A.Proceedings of the 14th International Seminar on Paste and Thickened Tailings.Perth:Australian Centre of Geomechanics，2011:167-173.
[4]胡文达，焦华茹，王贻明，等.基于 H-B 指数的谦比希铜矿全尾砂浆临界浓度确定［J］.现代矿业，2013(5):17-19.(Hu Wen-da，Jiao Hua-ru，Wang Yi-ming，et al.Confirmation of critical concentration of full tailings slurry of the chambishi copper mine which based on H-B index［J］.Morden Mining，2013(5):17-19.)
[5]Wang X M，Zhao B，Zhang C S，et al.Paste-like self-flowing transportation backfilling technology based on coal gangue［J］.Mining Science and Technology ，2009，19(2):137-143.
[6]李海洲，杨天鸿，夏冬，等.基于软岩流变特性的边坡动态稳定性分析［J］.东北大学学报(自然科学版)，2013，34(2):293-296.(Li Hai-zhou，Yang Tian-hong，Xia Dong，et al.Slope stability analysis based on soft-rock rheological characteristics［J］.Journal of Northeastern University (Natural Science)，2013，34(2):293-296.)
[7]Bohme G.Non-Newtonian fluid mechanics［M］.Amsterdam:Elsevier，2012:25-30.
[8]Cheng X，McCoy J H，Israelachvili J N，et al.Imaging the microscopic structure of shear thinning and thickening colloidal suspensions［J］.Science，2011，333(6047):1276-1279.
[9]Chen L，Xu X，Wu J，et al.Characteristics variation of tailings using cemented paste backfill technique［J］.Water，Air & Soil Pollution，2014，225(5):1-7.
[10]王劼，杨超，张军，等.膏体充填管道输送阻力损失计算方法［J］.金属矿山，2011(12):33-36.(Wang Jie，Yang Chao，Zhang Jun，et al.Calculation method of the resistance loss in pipeline transportation of paste filling slurry［J］.Metal Mine，2011(12):33-36.)

超细全尾砂似膏体长距离自流输送的时变特性

Time-Varying Characteristic of Paste-like Super-Fine Unclassified Tailings in Long Self-Flowing Transportation

RichHTML

PDF (PC)

可视化

摘要/Abstract

引用本文

使用本文

参考文献

相关文章 1

编辑推荐

Metrics

本文评价