湿法冶金
濕法冶金
습법야금
HYDROMETALLURGY OF CHINA
2013年
5期
319-322
,共4页
废催化剂%钼%空气氧化%氢氧化钠%浸出%有价金属%回收
廢催化劑%鉬%空氣氧化%氫氧化鈉%浸齣%有價金屬%迴收
폐최화제%목%공기양화%경양화납%침출%유개금속%회수
spent catalyst%molybdenum%air oxidation%sodium hydroxide%leaching%valuable metal%recovery
研究了采用空气氧化、氢氧化钠浸出、硝酸酸化工艺从废钼催化剂中回收 Mo、Co、Ni等有价金属。试验结果表明：在空气流量30 L/min、氢氧化钠加入量为金属Mo理论耗量1倍、浸出温度85℃条件下，钼浸出率达99．8％；碱浸渣用硝酸酸化、双氧水除铁，双氧水加入量为铁理论量的2～3倍，反应温度70℃；滤液用NaO H溶液调p H为9．5，镍、钴以氢氧化物形式沉淀，酸溶后，用P507萃取剂萃取分离钴、镍。该工艺采用空气氧化，避免了传统焙烧工艺MoO3的挥发损失；用NaOH浸出Mo ，生产成本降低，工艺流程简单，金属回收率较高。
研究瞭採用空氣氧化、氫氧化鈉浸齣、硝痠痠化工藝從廢鉬催化劑中迴收 Mo、Co、Ni等有價金屬。試驗結果錶明：在空氣流量30 L/min、氫氧化鈉加入量為金屬Mo理論耗量1倍、浸齣溫度85℃條件下，鉬浸齣率達99．8％；堿浸渣用硝痠痠化、雙氧水除鐵，雙氧水加入量為鐵理論量的2～3倍，反應溫度70℃；濾液用NaO H溶液調p H為9．5，鎳、鈷以氫氧化物形式沉澱，痠溶後，用P507萃取劑萃取分離鈷、鎳。該工藝採用空氣氧化，避免瞭傳統焙燒工藝MoO3的揮髮損失；用NaOH浸齣Mo ，生產成本降低，工藝流程簡單，金屬迴收率較高。
연구료채용공기양화、경양화납침출、초산산화공예종폐목최화제중회수 Mo、Co、Ni등유개금속。시험결과표명：재공기류량30 L/min、경양화납가입량위금속Mo이론모량1배、침출온도85℃조건하，목침출솔체99．8％；감침사용초산산화、쌍양수제철，쌍양수가입량위철이론량적2～3배，반응온도70℃；려액용NaO H용액조p H위9．5，얼、고이경양화물형식침정，산용후，용P507췌취제췌취분리고、얼。해공예채용공기양화，피면료전통배소공예MoO3적휘발손실；용NaOH침출Mo ，생산성본강저，공예류정간단，금속회수솔교고。
Recovery of Mo ,Co and Ni from spent catalyst by air oxidation-NaOH leaching-HNO3 acidification process was studied .Experimental results show that the leaching of Mo is 99 .8% under the conditions of air flow of 30 L/min ,NaOH usage of doubled the theoretical Mo consumption ,leaching temperature of 70 ℃ .The iron is removed from the residue by HNO 3 acidification and H2 O2 oxidation at the conditions of 70 ℃ and H2 O2 usage of 2-3 times iron consumption .When filtrate pH is controlled at 9 .5 ,Ni and Co are precipitated in the forms of hydroxides ,and then are separated by acid dissolving and solvent extraction using P 507 .The method can avoid MoO3 evaporation ,and has low production cost and high metal recovery .
