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细尾砂浆自然浓缩规律试验研究

第27卷第7期

2018年7月中 国 矿 业CHINAMININGMAGAZINE Vol .27,No .7

July 2018

细尾砂浆自然浓缩规律试验研究

曹三六1,李宗楠2,3,余小明1,魏晓明2,3

(1.铜陵有色金属集团股份有限公司安庆铜矿,安徽安庆246131;

2.北京矿冶科技集团有限公司,北京100160;

3.国家金属矿绿色开采国际联合研究中心,北京100160)

摘 要:用于矿山充填骨料的细尾砂,在制备过程中沉降速率慢、底流浓度低,严重影响尾砂制备工

艺。本文设计了低浓度、中高浓度和高浓度等不同初始浓度的细尾砂浆,开展了12组自然沉降试验。通

过分析细尾砂浆自然沉降底流浓度的结果,得出尾砂浆初始浓度在范围8%~55%内与其自然沉降底流浓

度之间呈线性关系,其相关系数为0.16,最小底流浓度为66.4%;中低浓度尾砂浆自然沉降过程中,“清水

区”浊度较高,沉降面不明显,且出现“三分层现象”,表明在沉降过程中有存在明显粗细分层现象,其粗颗

粒沉降速率较高,而细颗粒部分沉降速率极低;高浓度尾砂的沉降速率随着砂浆浓度增加而有降低的

趋势。

关键词:尾砂充填;细尾砂;浓缩;沉降速率

中图分类号:TD 926.2+1 文献标识码:A 文章编号:1004-4051(2018)07-0090-04

Experimentalstudyonthelawsofnaturalconcentrationoffinetailings

CAO Sanliu 1,LI Zongnan 2,3,YU Xiaoming 1,WEI Xiaoming 2,

3(1.Anqing Copper Mine ,Tongling Nonferrous Metals Group Co .,Ltd .,Anqing 246131,China ;

2.BGRIM M Technology Group ,Beijing 100160,China ;

3.National Center for International Joint Research on Green Metal Mining ,Beijing 100160,China )

Abstract:The fine tailing used for filling aggregates in mines had a slow settling rate and a low

concentration of underflow ,w hich seriously affected the tailings preparation process .In the paper ,the low ,

medium and high concentration of fine tailings with different initial concentrations were designed and 12sets of natural settlement tests were carried out .By analyzing the test results of the underflow concentration of the fine tailings ,the linear relationship was found between the initial concentration in the range of 8%~55%and the underflow concentration .The correlation coefficient was 0.16and the initial concentration was 66.4%.In the process of natural sedimentation of middle and low concentration tailings slurry ,the “clear

water area ”had higher turbidity ,the settlement surface not obvious ,and “three -layers phenomenon ”

appeared ,w hich indicated that there was a clear coarse subdivision phenomenon and the rate of fine tailings was extremely low .According to the law of settlement curve of high concentration tailings ,it could be seen

that the sedimentation rate decreased with the increase of tailings concentration . Keywords:tailings filling ;fine tailings ;concentration ;sedimentation rate 收稿日期:2018-03-21 责任编辑:刘艳敏基金项目:国家科技支撑计划项目资助(编号:2013BAB 02B 02);国家国际科技合作专项资助(编号:2014DFR 70340);北京矿冶研究总院科技基金重大项目资助(编号:YJZ -2013-0200)

第一作者简介:曹三六(1970-),男,工程师,主要从事矿山充填技术与采矿工艺方面的生产与研究工作。

引用格式:曹三六,李宗楠,余小明,等.细尾砂浆自然浓缩规律试验研究[J ].中国矿业,2018,27(7):90-93.doi :10.12075/j .issn .1004-4051.2018.07.026. 浓缩性质是尾砂的一个重要特性,在研究尾矿

利用方面具有重要的研究价值,尾矿的浓缩性质受

尾矿固体颗粒粒度的影响,在沉降过程中表现出不同的沉降特征。不同的给料浓度(或称初始浓度),

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