中国有色金属学报
中國有色金屬學報
중국유색금속학보
THE CHINESE JOURNAL OF NONFERROUS METALS
2014年
9期
2393-2399
,共7页
郭朝晖%姜智超%刘亚男%王硕
郭朝暉%薑智超%劉亞男%王碩
곽조휘%강지초%류아남%왕석
钨铋钼矿%多金属矿选矿废水%混凝沉淀法%现场试验
鎢鉍鉬礦%多金屬礦選礦廢水%混凝沉澱法%現場試驗
오필목광%다금속광선광폐수%혼응침정법%현장시험
W,Bi and Mo ore%multi-metal ore dressing wastewater%coagulation-sedimentation method%field test
多金属矿选矿废水具有悬浮物浓度和化学需氧量(COD)高、重金属浓度低但种类多等特点，难以稳定达标排放。采用含铝无机高分子混凝剂和有机助凝剂两步混凝沉淀处理钨铋钼矿选矿废水，24 h现场动态取样研究结果表明，混凝沉淀法可高效处理钨多金属矿选矿废水。在废水中先后投加0.75%(体积分数)质量浓度为27 g/L(以铝计)的含铝无机高分子混凝剂和0.5%(体积分数)质量浓度为1 g/L的有机助凝剂，混凝沉淀4 min后，选矿废水浊度去除率达96.5%以上，COD去除率达70%左右；废水中As和Pb去除率分别达90%和97.6%以上，Be和Cd去除率几乎达100%。处理后废水浊度小于50 NTU、COD平均含量降至58 mg/L，废水中As和Pb浓度分别降至0.5 mg/L和80μg/L以下，未检出Be和Cd，出水水质满足《污水综合排放标准》(GB 8978-1996)一级标准。
多金屬礦選礦廢水具有懸浮物濃度和化學需氧量(COD)高、重金屬濃度低但種類多等特點，難以穩定達標排放。採用含鋁無機高分子混凝劑和有機助凝劑兩步混凝沉澱處理鎢鉍鉬礦選礦廢水，24 h現場動態取樣研究結果錶明，混凝沉澱法可高效處理鎢多金屬礦選礦廢水。在廢水中先後投加0.75%(體積分數)質量濃度為27 g/L(以鋁計)的含鋁無機高分子混凝劑和0.5%(體積分數)質量濃度為1 g/L的有機助凝劑，混凝沉澱4 min後，選礦廢水濁度去除率達96.5%以上，COD去除率達70%左右；廢水中As和Pb去除率分彆達90%和97.6%以上，Be和Cd去除率幾乎達100%。處理後廢水濁度小于50 NTU、COD平均含量降至58 mg/L，廢水中As和Pb濃度分彆降至0.5 mg/L和80μg/L以下，未檢齣Be和Cd，齣水水質滿足《汙水綜閤排放標準》(GB 8978-1996)一級標準。
다금속광선광폐수구유현부물농도화화학수양량(COD)고、중금속농도저단충류다등특점，난이은정체표배방。채용함려무궤고분자혼응제화유궤조응제량보혼응침정처리오필목광선광폐수，24 h현장동태취양연구결과표명，혼응침정법가고효처리오다금속광선광폐수。재폐수중선후투가0.75%(체적분수)질량농도위27 g/L(이려계)적함려무궤고분자혼응제화0.5%(체적분수)질량농도위1 g/L적유궤조응제，혼응침정4 min후，선광폐수탁도거제솔체96.5%이상，COD거제솔체70%좌우；폐수중As화Pb거제솔분별체90%화97.6%이상，Be화Cd거제솔궤호체100%。처리후폐수탁도소우50 NTU、COD평균함량강지58 mg/L，폐수중As화Pb농도분별강지0.5 mg/L화80μg/L이하，미검출Be화Cd，출수수질만족《오수종합배방표준》(GB 8978-1996)일급표준。
Dressing wastewater is characterized by several aspects, such as high suspended solids and chemical oxygen demand (COD) concentration, low metal concentrations, and hardly meets the discharge demand, and so on. In this work, the treatment of wastewater from W, Bi and Mo ore dressing process using inorganic polymer coagulant containing aluminum followed with organic flocculant was studied through 24-hour dynamic test on site. The results show that the wastewater from W containing multi-metal ore dressing process can be treated effectively by the coagulation combined with sedimentation. When 0.75% (volume percentage) inorganic containing aluminum polymer coagulant of 27 g/L (balance with aluminum) and 0.5%(volume percentage) organic flocculant of 1 g/L were added to the wastewater from W, Bi and Mo ore dressing process, the removal percentage of wastewater turbidity exceeds 96.5%after 4 min, that of COD is about 70%, and those of As and Pb in wastewater exceed 90%and 97.6%, while those of Be and Cd are both almost 100%, respectively. The residual concentrations of turbidity and COD in wastewater are only 50 NTU and 58 mg/L, while those of As and Pb are less than 0.5 mg/L and 80 μg/L and of Be and Cd are below the detection limit, respectively. After coagulation and sedimentation, the quality of wastewater from W, Bi and Mo ore dressing process can meet the grade I level of the National Integrated Wastewater Discharge Standard (GB 8978-1996).
