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当前位置:首页 > 商业/管理/HR > 公司方案 > 甘肃某黄金冶炼含砷废水处理工艺设计黄海辉
5320156NonferrousMetalsEngineeringVol.5No.3June2015doi10.3969/j.issn.2095-1744.2015.03.022100160。、、。—GB8978—1996《》。—X758X703A2095-1744201503-0096-05TechnologyDesignofArsenicWastewaterTreatmentforaGoldSmelterinGansuHUANGHai-huiWANGYunCHANGYao-chaoSUNLiu-genGUOChi-haoLIYunBeijingGeneralResearchInstituteofMiningandMetallurgyBeijing100160ChinaAbstractTheflowsheetandequipmentconfigurationofarsenicwastewatertreatmentsystemforagoldsmelterinGansuaredescribed.Astherefractorygoldconcentrateswitharsenicfrommultipleminesthecompositionoftherawmaterialsiscomplexsothewastewaterfromthepurificationsectioncontainscopperleadarsenicandotherimpurities.Thetechnologicalproceduresappliedsulfideprecipitationprocesscombinedwithlime-ironsaltprocessisdesignedtotreatthearsenicwastewater.ThedrainageisconsonantwiththefirstgradeindexesofGB8978-1996《integratedWastewaterDischargeStandard》andallwastewaterisrecycled.Keywordsgoldsmeltingarsenicwastewatersulfideprecipitationlime-ironsaltprocessdesign2014-12-031982-。400t/d87kt/aAu43.24g/tAg16.22g/tCu0.18%S25%As4.32%Fe23.97%1、、、、。→→→→→。+→→→。++SO2。、、、。360m3/d600m3/d1。1Table1Maincomponentsofarsenicwastewater/mg·L-1AsCuZnPbH2SO41672.724.1710.006.67721601H2SO3H2SO4。1、、—、、、2、—、+—3-4。40mg/L—40mg/L200mg/L200mg/L—+—3。672.72mg/L+—。。+———。—1。1Fig.1Flowsheetforwastewatertreatment1.11.2。、、5Na2S+CuSO4→CuS↓+Na2SO42HAsO2+3Na2S+3H2SO4→As2S3↓+3Na2SO4+4H2O2H3AsO4+5Na2S+5H2SO4→As2S5↓+5Na2SO4+8H2ONa2S+H2SO4→H2S↑+Na2SO4。pH≤2pH>2。。、、H2S10%~15%NaOH。H2S。pH1.5~2.0Na2S10%~15%NaOH10%~15%。1.2—15%~20%pH7~9。10∶1~30∶1Fe2+Fe3+793。6Ca2++SO42-→CaSO4↓3Ca2++2AsO33-→Ca3AsO32↓3Ca2++2AsO43-→Ca3AsO42↓4Fe2++O2+2H2O→4Fe3++4OH-2AsO2-+O2+4OH-→2AsO43-+2H2O3Ca2++2AsO43-→Ca3AsO42↓Fe3++AsO43-→FeAsO4↓。《》GB8978-1996。。。、、。85%~95%。—pH7~8pH8~910∶1~30∶1FeSO410%~15%。22.115m3/h6h90m30.9100m3Φ4000×4500mm。2.2、30m3/h6h180m30.9200m36Φ3500×4000mm33。2.310t/d0.5t/m2·d1.224m2。Φ6m。2.45.3t/h0.9t/m2·d1.2169.6m2。Φ15m。2.53.2t/h1.2t/m32.67m31.21/h3.2m3。F=200m223.22m2。2.618m3/h30m3/h0.5m3/m2·h60m2F=65m2211。2Table2MainequipmentsandspecificationsinwastewatertreatmentsystemΦ4000×4500Q2352Φ6m1XGZY80/1000-U2Φ4000×3500Q2351Q=6000m3/h1Φ3500×4000Q2351Φ3500×4000Q2351Φ2000×2500316L2Φ3500×4000Q2353Φ15mQ2351XMZGF200/1250-U2Φ3500×4000Q2353Q=20m3/minP=49kPa1F=65m223389.77166.65171.812.379.4339.51。—842.15401.77364.186.5322.0247.65。8953Na2S·9H2O1650/tFeSO4·7H2O800/tCaO500/t。3+—Table3Sulfidization&lime-ironsaltreagentcostsofwastewatertreatment/kg·m-3Na2S·9H2OFeSO4·7H2OCaO/·m-3-3.870.7541.3827.684+—。0.48t/d4。38.12t/d56。4Table4MaincompositionandyieldofarsenicresidueAsCuZnPbS/%50.050.250.150.4034.2514.89100.0/kg·d-1239.761.200.721.92164.0671.34479.005Table5MaincompositionandyieldofneutralizedresidueAsCuZnPbCaSO4FeOH3/%0.0060.00040.0070.000894.2190.2635.504100.0/kg·d-12.250.152.590.3135916.40100.202098.1038120.006Table6Waterquality/mg·L-1AsCuZnPb672.724.1710.006.67721606.730.838.001.3366600—0.470.420.800.470.00GB8978—19960.50.51.51.0-。《》GB5085.6—20070.1%。0.006%FeAsO40.016%。GB8978—1996《》。、、10mg/L7。。7Table7Indicatorsofarseniccontentinoperation/mg·L-1-2014-09-20267.316.150.432014-09-23253.437.600.532014-09-25256.7210.270.412014-10-08332.4611.640.472014-10-10304.8213.720.482014-10-22298.658.960.452014-11-04357.8717.890.542014-11-06402.338.050.482014-11-10387.585.810.35317.9110.010.465+—。—。。112ContinuedonP112993174159Cu-Sn-Pb91.4%。、、Cu-Sn-Pb。122Cu-Sn-Pb。。。15912779.9%17411566%。、。。。。。1.———M.20101-6.2.2002J.200416-19.3.J.2004384-95.4.———J.200949163-68159.5.———《》J.2012298-101.6.J.200153392-97.99ContinuedfromP99。。GB8978-1996《》。1.M.2004184-186.2.J.201039463-6628.3.J.2009239-44.4.J.200928112-17.5.Na2SJ.2000441-43.6.-J.200312179-81.2115
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