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1、第35卷第6期礦冶工程V0I_35No62015年12月MININGANDMETALLURGICALENGINEERINGDecember2015從含釩石煤燃燒灰渣浸出液中萃取釩的實(shí)驗(yàn)研究朱軍,衛(wèi)琛浩,齊建云,唐洋洋,劉歡,朱明明(1.西安建筑科技大學(xué)冶金工程學(xué)院,陜西西安710055;2.西北有色地質(zhì)研究院,陜西西安710054)摘要:針對(duì)陜西某地低熱值含釩石煤燃燒灰渣的硫酸浸出液,采用溶劑萃取法除雜并富集釩。結(jié)果表明:浸出液經(jīng)中和還原處理后,采用12.5%P+5%TBP+82.5%磺化煤油進(jìn)行4級(jí)逆流萃取,相
2、比(O/A)為2,萃原液pH值為2,振蕩時(shí)間為2min,靜置1min,釩萃取率可達(dá)到99.31%。采用4級(jí)逆流反萃,反萃劑硫酸1.5moL/L,相比(O/A)為4,振蕩4min,靜置1min,釩反萃率為96.94%。關(guān)鍵詞:石煤;灰渣;萃??;釩;P2o4;TBP中圖分類號(hào):TF804.2文獻(xiàn)標(biāo)識(shí)碼:Adoi:10.3969/j.issn.0253-6099.2015.06.020文章編號(hào):0253-6099(2015)06-0081—04ExperimentalStudyonExtracti0n0fVanadiu
3、mfromLowCalorificValueCoalAshLeachingLiquidZHUJun,WEIChen—hao,QIJian.yun,TANGYang.yang,LIUHuan,ZHUMing—ming(1.SchoolofMetallurgyEngineering,XianUniversityofArchitectureandTechnology,Xian710055,Shaanxi,China;2.NorthwestGeologicalInstituteofNonferrousMetals,Xia
4、n710054,Shaanxi,China)Abstract:Stonecoalvanadiumalwaysexistsinthecomplexformandthereareregionaldifferencesintheprocessofextractionofvanadium.Asforthesulfuricacidleachingliquidoflow-calorificvaluevanadium—containingstonecoalash,theprocessofsolventextractionwas
5、adoptedtoenrichvanadiumandremovetheimpuritiesfromtheleachingliquid.Theleachingliquidwasfirstlysubjectedtoaneutralizingreductionprocess.followedby4一stagecountereurrentextractionwith12.5%P2o4+5%TBP+82.5%sulfonatedkerosene,withphaseratio(O/A)at2,initialpHvalueof
6、extractionat2,2-minmixingand1一minsettling.resultinginvanadiumextractionrateat99.31%.Whilethesubsequent4一stagecountercurrentstrippingwith1.5mol/Lsulfuricacid,phaseratio(O/A)at4,4一minmixingand1-minsettling,canresultinthestrippingyieldofvanadiumupto96.94%.Keywor
7、ds:stonecoal;ash;extraction;vanadium;P2o4;TBP釩是“金屬的維生素”,添加少量的釩即可大大溶劑萃取法除雜并富集釩。提高鋼鐵的強(qiáng)度、韌性和耐磨性能2J。石煤中釩的賦1實(shí)驗(yàn)原料及方法存形態(tài)復(fù)雜,不同地區(qū)提釩工藝亦不同,濕法提釩浸出液中含有大量雜質(zhì)(Fe、A1等),采用常規(guī)法調(diào)整1.1實(shí)驗(yàn)原料pH值后直接凈化沉釩,工藝復(fù)雜,釩損失率高。實(shí)驗(yàn)原料為陜西某地低發(fā)熱值石煤燃燒灰渣采用采用溶劑萃取法富集并凈化浸出液,與常規(guī)凈化直接酸浸逆流洗滌循環(huán)浸出得到的酸性浸出液。浸出工藝相比,可使
8、浸出液中的雜質(zhì)與釩有效地分離,同時(shí)液中主要元素分析檢測(cè)結(jié)果見(jiàn)表1。可把釩從每升幾克富集到每升幾十克J。溶劑萃取表1浸出液主要成分/(g·L)法具有選擇性強(qiáng)、富集率高、處理能力大、平衡速度快、連續(xù)操作及易于實(shí)現(xiàn)自動(dòng)化等優(yōu)點(diǎn)。。,本文針對(duì)陜西某地低熱值含釩石煤燃燒灰渣的硫酸浸出液,采用①收稿日期:2Ol5—06—15基金項(xiàng)目:陜西省2011科技統(tǒng)籌重大地方專項(xiàng)(2011KPD