Effect of Citric Acid Immersing Pre-treated on the Performance of the Phosphogypsum Cemented Paste Backfill

Zhaodong HUANG; Deming ZHANG; Yikai LIU; Qinli ZHANG; Hao WANG

doi:10.11872/j.issn.1005-2518.2020.01.102

Gold Science and Technology >

2020 , Vol. 28 >Issue 1: 97 - 104

DOI: https://doi.org/10.11872/j.issn.1005-2518.2020.01.102

Mining Technology and Mine Management

Effect of Citric Acid Immersing Pre-treated on the Performance of the Phosphogypsum Cemented Paste Backfill

Zhaodong HUANG ,
Deming ZHANG ,
Yikai LIU ,
Qinli ZHANG ,
Hao WANG

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

Received date: 2019-06-28

Revised date: 2019-09-03

Online published: 2020-02-26

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Highlights

In order to explore the feasibility of citric acid Immersing pre-treated phosphogypsum as the cemented paste backfill material,the phosphogypsum was pretreated with citric acid aqueous solution with a mass concentration of 4%. The treated phosphogypsum and the untreated phosphogypsum were respectively prepared into cemented backfill test pieces having a mass concentration of 62% and 64% and a lime-sand ratio of 1∶7，1∶9 and 1∶11. The samples under standard curing conditions were subjected to shear rheology tests，uniaxial compressive strength（UCS） tests at 7 d，14 d，and 28 d，and scanning electron microscopy （SEM）tests. The experimental results show that the uniaxial compressive strength of the pre-treated phosphogypsum filling body is significantly higher than that of the untreated phosphogypsum filling body，and the main strength formation period is 0~7 d. At the same time，the pretreatment of phosphogypsum can reduce the yield stress of the slurry. The SEM results show that the microstructure of the pretreated phosphogypsum filling body is more than that of the untreated phosphogypsum，and the microstructure is more compact. Based on the above research，the use of citric acid leaching to pretreat phosphogypsum in practical industrial applications can greatly reduce the amount of cementitious materials，and improve the slurry transport performance and thus significantly reduce the filling cost，but specific industrial applications need further exploration.

Cite this article

Zhaodong HUANG , Deming ZHANG , Yikai LIU , Qinli ZHANG , Hao WANG . Effect of Citric Acid Immersing Pre-treated on the Performance of the Phosphogypsum Cemented Paste Backfill[J]. Gold Science and Technology, 2020 , 28(1) : 97 -104 . DOI: 10.11872/j.issn.1005-2518.2020.01.102

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http://www.goldsci.ac.cn/article/2020/1005-2518/1005-2518-2020-28-1-97.shtml

References

Publishing order | Descend order by publishing year | Descend order by cited within

1	兰文涛，吴爱祥，王贻明，等.半水磷石膏充填强度影响因素试验[J].哈尔滨工业大学学报，2019，51（8）：128-135. Lan Wentao， Wu Aixiang， Wang Yiming，et al. Test study on factors affecting the filling strength of hemihydrate phosphogypsum [J]. Journal of Harbin Institute of Technology，2019，51（8）：128-135.

2	李夕兵，刘冰，姚金蕊，等.全磷废料绿色充填理论与实践[J].中国有色金属学报，2018，28（9）：1845-1865. Li Xibing， Liu Bing， Yao Jinrui，et al. Theory and practice of green mine backfill with whole phosphate waste [J]. The Chinese Journal of Nonferrous Metals，2018，28（9）： 1845-1865.

3	赵国彦，侯俊，张小瑞，等.磷石膏膏体充填体力学特性研究[J].黄金科学技术，2016，24（5）：7-12. Zhao Guoyan， Hou Jun， Zhang Xiaorui，et al.Study on the mechanical properties of the phosphogypsum paste filling material[J]. Gold Science and Technology，2016，24（5）： 7-12.

4	王新民，薛希龙，张钦礼，等.碎石和磷石膏联合胶结充填最佳配比及应用[J].中南大学学报（自然科学版)，2015，46（10）：3767-3773. Wang Xinmin， Xue Xilong， Zhang Qinli，et al.Optimum ratio and application of joint cemented backfill with crushed rock and phosphogypsum [J]. Journal of Central South University（Science and Technology)，2015，46（10）：3767-3773.

5	刘冰，李夕兵.全磷废料高浓度充填两相流环管实验研究[J].黄金科学技术，2018，26（5）：615-621. Liu Bing， Li Xibing. Study on two-phase flow loop test of high concentration backfill with total phosphorus waste [J]. Gold Science and Technology，2018，26（5）： 615-621.

6	Jiang G Z， Wu A X， Wang Y M，et al. Low cost and high efficiency utilization of hemihydrate phosphogypsum： Used as binder to prepare filling material[J].Construction and Building Materials，2018，167：263-270.

7	Saikhede S R， Satone S R. An experimental investigation of partial replacement of cement by various percentage of phosphogypsum and flyash in cement concrete[J]. International Journal of Engineering Research and Applications，2014，4（7）：785-787.

8	李永靖，岳玮琦，潘铖，等.预处理工艺影响磷石膏水泥砂浆性能研究[J].非金属矿，2018，41（1）：15-17. Li Yongjing， Yue Weiqi， Pan Wei，et al.Study on influence of pretreatment process on phosphogypsum and slag cement [J]. Non-Metallic Mines，2018，41（1）： 15-17.

9	Liu Y K， Zhang Q L， Chen Q S，et al. Utilization of water-washing pre-treated phosphogypsum for cemented paste backfill[J]. Minerals，2019，9（3）：175.

10	刘路珍，陈德玉，刘宇浩，等.磷石膏预处理及制备建筑石膏的研究[J].非金属矿，2014，37（3）：30-32. Liu Luzhen， Chen Deyu， Liu Yuhao，et al.Study on the pretreatment technology and preparing construction gypsum of phosphogypsum [J]. Non-Metallic Mines，2014，37（3）： 30-32.

11	郭成洲. 氟、磷对硅酸盐水泥熟料矿物水化过程影响机理研究[D]. 武汉：武汉理工大学，2012. Guo Chengzhou. Effect Mechanism of Fluorine and Phosphorus on Hydration Process of Cement Clinker [D]. Wuhan：Wuhan University of Technology，2012.

12	Koopman C， Witkamp G J. Ion exchange extraction during continuous recrystallization of CaSO₄ in the phosphoric acid production process： Lanthanide extraction efficiency and CaSO₄ particle shape[J]. Hydrometallurgy，2002，63（2）：137-147.

13	张政，杨志强，高谦. 金川矿磷石膏基早强型充填胶凝材料配方试验[J]. 化工矿物与加工，2016（1）：31-35. Zhang Zheng， Yang Zhiqiang， Gao Qian. Formulation test of phosphogypsum based early strength filling cementitious material in Jinchuan mine[J].Chemical Minerals and Processing，2016（1）：31-35.

14	Rashad A M. Phosphogypsum as a construction material[J]. Journal of Cleaner Production，2017，166:732-743.

15	甘德清，薛娜，薛振林，等.全尾砂料浆流变特性实验[J].矿业研究与开发，2019，39（5）：104-109. Gan Deqing， Xue Na， Xue Zhenlin，et al. Experiment on rheological properties of full tailings slurry [J].Mining Research and Development，2019，39（5）：104-109.

16	王芳，刘晓丽，王恩志，等.含水砂层的剪切流变力学特性试验分析[J].地下空间与工程学报，2018，14（2）：323-331. Wang Fang， Liu Xiaoli， Wang Enzhi，et al. Experimental research on shear rheological mechanical properties of water-bearing sand layer [J]. Chinese Journal of Underground Space and Engineering，2018，14（2）：323-331.

17	张钦礼，王钟苇，荣帅，等.深井矿山全尾砂胶结充填体早期强度特性及微观影响机理分析[J].有色金属工程，2019，9（6）：97-104. Zhang Qinli， Wang Zhongwei， Rong Shuai，et al.Early strength characteristics and microcosmic influence mechanism analysis of cemented filling body of full tailings in deep mine [J].Nonferrous Metals Engineering，2019，9（6）：97-104.

18	梁旭辉，刘芳，许耀文，等.硅酸盐水泥改性磷建筑石膏及水化机理研究[J].非金属矿，2018，41（2）：45-47. Liang Xuhui， Liu Fang， Xu Yaowen，et al. Study on modification of hemihydrate phosphogypsum with ordinary portland cement and its hydration mechanism[J]. Non-Metallic Mines，2018，41（2）：45-47.

19	董璐，高谦，南世卿，等.超细全尾砂新型胶结充填料水化机理与性能[J].中南大学学报（自然科学版），2013，44 （4）：1571-1577. Dong Lu， Gao Qian， Shiqing Nan，et al.Performance and hydration mechanism of new super fine cemented whole-tailings backfilling materials[J].Journal of Central South University （Science and Technology），2013，44 （4）：1571-1577.

20	李鑫，王炳文，游家梁，等.尾砂胶结充填体力学性能与微观结构研究[J].中国矿业，2016，25 （6）：169-172. Li Xin， Wang Bingwen， You Jialiang，et al. Study on mechanical properties and microstructure of the cemented tailings backfill [J].China Mining Magazine，2016，25（6）：169-172.

21	胡建华，蒋权，任启帆，等.充填体孔隙结构与中观参数跨尺度关联特征[J].中国有色金属学报，2018，28（10）：2154-2163. Hu Jianhua， Jiang Quan， Ren Qifan，et al. Cross scale correlation characteristics of pore structure and meso parameters of filling body[J]. The Chinese Journal of Nonferrous Metals，2018，28（10）：2154-2163.

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