本文關(guān)鍵詞： 廢棄含銅催化劑 熱解 動力學(xué) 氨浸 氧化亞銅　出處：《西南科技大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：經(jīng)熱解及氨浸方法回收廢棄含銅催化劑中的銅,并通過蒸氨還原法制備工業(yè)級氧化亞銅。研究了升溫速率、熱解終溫、終溫保持時間和空氣流量等因素對熱解廢棄含銅催化劑中有機(jī)物的影響;利用TG-DTG動力學(xué)分析方法,采用多重升溫速率和單重升溫速率結(jié)合的方法分析廢棄含銅催化劑的熱解動力學(xué);對熱解產(chǎn)生的尾氣進(jìn)行處理,分析了堿液比、尾氣流速和吸收液溫度對尾氣吸收率的影響;采用氨浸方法浸出熱解后的廢催化劑中的銅,研究了氨浸溫度、總氨濃度、氨-銨摩爾比、攪拌速率和粒徑對銅浸出率的影響,并研究了氨浸過程的動力學(xué),得到銅浸出的活化能E和反應(yīng)級數(shù)n;采用蒸氨還原方法制備工業(yè)級氧化亞銅。結(jié)果表明:熱解廢棄含銅催化劑中有機(jī)物的最佳條件為:升溫速率20℃·min-1,熱解終溫600℃,停留時間90min,空氣流量3.0L·min-1。廢催化劑熱解分為四個階段,四個階段的活化能Eα分別為16.181k J·min-1、43.841k J?mol-1、90.561k J?mol-1、52.313k J?mol-1,指前因子A分別為4.696×109s-1、1.457×1013s-1、8.662×1012s-1、4.939×105s-1,四個反應(yīng)階段的反應(yīng)機(jī)制和最概然函數(shù)分別為:化學(xué)反應(yīng)控制機(jī)制,符合Reaction order方程,f(α)=(1-α)2,g(α)=(1-α)-1-1、成核與長大(n=3)控制機(jī)制,符合Avrami-Erofeev方程,f(α)=1/3(1-α)[-ln(1-α)]-2,g(α)=[-ln(1-α)]3、第三、四步均為成核與長大(n=4)控制機(jī)制,符合Avrami-Erofeev方程,f(α)=1/4(1-α)[-ln(1-α)]-3,g(α)=[-ln(1-α)]4。堿液對熱解尾氣的吸收最佳條件為:氨液質(zhì)量比為1:2,溫度為50℃,尾氣流速為0.6L·min-1,尾氣吸收率為99.95%。氨浸條件為40℃的氨浸溫度,總氨濃度為4mol·L-1,氨-銨摩爾比為1:4,攪拌速率為300r·min-1,粒徑29.43μm條件下,銅的浸出率可達(dá)98%,銅浸出的活化能E為7.59 k J·min-1,反應(yīng)級數(shù)為0.6158。最終通過蒸氨還原法制的工業(yè)級氧化亞銅,按照HGT2961-2010檢測,符合HGT2961-2010標(biāo)準(zhǔn),純度可達(dá)97%。
[Abstract]:After pyrolysis and ammonia leaching method for recovering copper containing catalysts of copper in waste, and through ammonia reduction preparation method. The study of industrial grade cuprous oxide heating rate, pyrolysis temperature, temperature holding time and air flow rate and other factors of organic compounds containing copper catalyst in the pyrolysis of waste; using TG-DTG dynamic analysis method, the multiple heating rate and single rate combined with the analysis of heating method for waste pyrolysis kinetics of copper containing catalyst; exhaust on the pyrolysis of processing, analysis of alkali ratio, gas flow rate and temperature of absorption liquid of the tail gas absorption rate influence; the ammonia waste catalyst leaching method for leaching after pyrolysis of copper ammonia leaching temperature the study of concentration of total ammonia, ammonia - ammonium molar ratio, stirring speed and the influence of particle size on the leaching rate of copper, and to study the kinetics of ammonia leaching process, the leaching of copper activation energy E and the reaction order of N obtained by ammonia also; 鍘熸柟娉曞埗澶囧伐涓氱駭姘у寲浜氶摐.緇撴灉琛ㄦ槑:鐑В搴熷純鍚摐鍌寲鍓備腑鏈夋満鐗╃殑鏈，

本文編號：1519156