(1. 桂林理工大學(xué) 化學(xué)與生物工程學(xué)院，廣西有色金屬隱伏礦床勘查及材料開發(fā)協(xié)同創(chuàng)新中心，桂林 541004；
2. 廣西環(huán)境應(yīng)急與事故調(diào)查中心，南寧 530028；
3. 廣西壯族自治區(qū)固體廢物管理中心，南寧 530028)
摘 要: 采用兩種不同的活化方式對錫礦尾礦進(jìn)行活化，活化礦料不需要添加其他額外硅源和鋁源，在相同的活化堿量條件下，分別制備出不同硅鋁比的ZSM-5分子篩產(chǎn)物，并以XRD、SEM、ICP、BET、NH3-DRIFTS等多種物理化學(xué)手段對所得產(chǎn)物進(jìn)行表征。結(jié)果表明：當(dāng)活化堿量均為1.2時(shí)，高溫堿融活化法(F-R)可制備出硅鋁比為28.10的類球形ZSM-5產(chǎn)物，其相對結(jié)晶度可達(dá)到101.3%，收率為64.4%，比表面積相對較高(445 m2/g)；而采用低溫堿溶液活化法(LS-R)可制備出高硅鋁比(90.29)的形貌規(guī)整ZSM-5產(chǎn)物，其相對結(jié)晶度更高(達(dá)到123.9%)，但收率和比表面積相對小(分別為52.6%和404 m2/g)；兩種活化方式所得產(chǎn)物均含有B酸和L酸，但高溫堿融活化法所得產(chǎn)物的B酸量更多，并且高溫堿融活化法制備產(chǎn)物對尾礦中各主要元素利用率均高于低溫堿溶液活化法。本工作表明，有色金屬錫礦尾礦可實(shí)現(xiàn)高附加值資源化及減量化利用。
關(guān)鍵字: 錫礦尾礦；活化；合成；ZSM-5
（1. College of Chemistry and Bioengineering, Guilin University of Technology, Collaborative Innovation Center for Exploration of Hidden Nonferrous Metal Deposits and Development of New Materials in Guangxi, Guilin 541004, China;
2. Guangxi Environment Emergency and Accident Investigation Center; Nanning 530028, China;
3. Guangxi Solid Waste Management Center, Nanning 530028, China）
Abstract:ZSM-5 with different SiO2/Al2O3 mole ratio were synthesized from tin tailings without adding any other Si and Al source, and the tin tailings were activated by two different activation methods using the same content of activation alkaline. The product were characterized by XRD, SEM, ICP, BET and NH3-DRIFTS. And the results showed that spherical ZSM-5 product with relative crystallinity of 101.3%, specific surface area of 445 m2/g, SiO2/Al2O3 mole ratio of 28.10 and yield of 64.35% was prepared by the high-temperature alkali melt activation (F-R), and rounded shape ZSM-5 product with with relative crystallinity of 123.9%, specific surface area of 404 m2/g, SiO2/Al2O3 mole ratio of 90.29 and yield of 52.6% was prepared by the low temperature alkali solution activation when the content of activation alkaline was 1.2. Meanwhile, the product obtained from the two different activation methods all had B acid center and L acid center，and the product obtained from F-R activation method had much B acid center than that of the product obtained from LS-R activation method. Meanwhile, the utilization rate of the products prepared by F-R activation method was higher than that of the products prepared by LS-R activation method. On the whole, both activation methods can be used to recycle and reduce of the nonferrous metal tin tailings with high adding value.
Key words: tin tailings; activation; synthesis; ZSM-5
