Application of Paste Technology for Tailings Handling
To sustain the growth of industrial production necessitates the increasing of the amount of processed mined raw and secondary materials.As a side effect of raw material production,the amount of tailings material,- coming from mineral processing operations increases as well.Using wet technology,these tailing materials are generally transported and stored with the water used for previous operations.This habit could lead to dangerous situations.Enough to remember the disasters had happened to the last decade,safe tailings operations need to remove as much water from the solid as possible.Environmental,technical and economical needs should meet,therefore using a technology combining these specific needs could be necessary.Paste technology was introduced generally into tailings operations at the last ten years,as an answer to the call of the above mentioned challenges,however there are still many questions to answer within the frame of using it.The Institute of Raw Materials Processing and Environmental Process Engineering of the University of Miskolc has been dealing with mechanical process engineering,especially by the support of the EU project TAILSAFE Contract n° EVGl-CT-2002-0066 and the NKFP 3A/068/2004 Hungarian fund extensive research has been carried out about paste technology.Different test methods and materials were applied.Tested tailings materials were as follows: different fly ashes from coal power plants from Pécs- Hungary,Gy(o)ngy(o)s Hungary,Neyvil India,different Croatian ashes,hazardous waste incineration plant ashes from Dorog Hungary,different kind of sands from Hungary,free glass sand from Fehérvárcs(u)rg(o) Hungary,flotation ore processing tailing from Gy(o)ngy(o)soroszi Hungary.Different additives,as gypsum,bentonite and cement were tested as well.The applied test methods were as follows: physical material testing (laser sizer,piknometer,different microscopes),X-ray diffraction analysis,settling columns,the three measuring pipes tube viscometer (16～27 mm pipe diameter),a hydraulic test loop with different pumps (40～53 mm pipe diameter,0.2～4 m/s average slurry velocity range,0%～52 % volumetric concentration range),rotational viscometer,Cassagrande yield locus tester and the slump cone test.This paper summarizes and systematizes the results of the aforementioned research as well as reports about the developed paste pipe transport design method based on the fine suspensioncoarse mixture model.The paper also reports about a systematic experimental series with different materials to establish criteria when high concentration suspensions behave like paste.
Paste Tailings Fine suspension flow Slurry Viscometer Hydraulic loop
I.Gombk(o)t(o) J.Faitli
Institute of Raw Materials Processing and Environmental Process Engineering,University of Miskolc,Miskolc-Egyetemv(o)ros,Hungary
国际会议
XXIV International Mineral Processing Congress(第24届国际矿物加工大会)
北京
英文
3522-3528
2008-09-24（万方平台首次上网日期，不代表论文的发表时间）