CAJ | 학술논문

广西大厂凤凰选矿厂处理锡石硫化矿。通过柱式静态浸泡试验研究了浸泡液初始pH值、液固比、尾矿堆积高度对该厂尾矿中Mn、Zn、As溶出行为的影响以及不同条件下浸泡液pH的变化情况。结果表明：①不同的初始pH、液固比以及尾矿堆积高度下,随着浸泡时间的延长,Mn和Zn的溶出浓度均先显著下降然后趋于稳定,累积溶出量均先快速增长然后缓慢增长,As则无论是溶出浓度还是累积溶出量均总体上呈近乎线性增长趋势,而浸泡液的pH值均被中和到7．2~8．0之间。②初始pH为3．5时Mn、Zn最易溶出,为5．5时次之,为4．5时相对最难,但初始pH对As的溶出无显著影响；液固比越大,Mn、Zn和As均越容易溶出；尾矿堆积高度总体上对Mn、Zn和As的溶出都无显著影响。③试验范围内,Mn、Zn、As的溶出量都很低,对应的累积溶出量最大值分别只有14．505、13．471、0．768 mg/kg。以上研究成果可为现场尾矿库重金属污染的防控提供参考。
엄서대엄봉황선광엄처리석석류화광。통과주식정태침포시험연구료침포액초시pH치、액고비、미광퇴적고도대해엄미광중Mn、Zn、As용출행위적영향이급불동조건하침포액pH적변화정황。결과표명：①불동적초시pH、액고비이급미광퇴적고도하,수착침포시간적연장,Mn화Zn적용출농도균선현저하강연후추우은정,루적용출량균선쾌속증장연후완만증장,As칙무론시용출농도환시루적용출량균총체상정근호선성증장추세,이침포액적pH치균피중화도7．2~8．0지간。②초시pH위3．5시Mn、Zn최역용출,위5．5시차지,위4．5시상대최난,단초시pH대As적용출무현저영향；액고비월대,Mn、Zn화As균월용역용출；미광퇴적고도총체상대Mn、Zn화As적용출도무현저영향。③시험범위내,Mn、Zn、As적용출량도흔저,대응적루적용출량최대치분별지유14．505、13．471、0．768 mg/kg。이상연구성과가위현장미광고중금속오염적방공제공삼고。
Fenghuang Dressing Plant of Dachang in Guangxi Province is planning to deal with the cassiterite sulfide ore. Effects of soaking solution pH,liquid-solid ratio,stack height on release behavior of Mn,Zn,As in tailings,as well as pH values at various conditions,are investigated through the column static soaking immersion tests. Results indicated that:①when the in-itial pH,liquid-solid ratio,and stack height are different,and as the leaching time extended,release concentration of Mn and Zn is dropped dramatically first and then went steady. The cumulative release was rapidly increased first and then grown slowly. Meanwhile,As leaching concentration as well as cumulative release are nearly linearly increased,and the pH value of the soa-king solution is neutralized from 7. 2 to 8. 0.②Mn and Zn releases are the easiest when the initial pH is 3. 5,a little hard with pH value of 5. 5,and the hardest when pH is 4. 5,but the initial pH value has no influence on As leaching behavior;The high-er of liquid-solid ratio,the more easily Mn,Zn and As is leached;Stack height of tailings has little influence on leaching be-havior of Mn,Zn and As.③Within the test range,the release of Mn is very low,as well as Zn and As,and the corresponding maximum leaching amount is 14. 505,13. 471,0. 768 mg/kg respectively. The research results above provide some references for heavy metal pollution prevention and control in the field of tailings dam.