城市礦產(chǎn)中廢塑料浮選分離技術(shù)研究
[Abstract]:Under the dual background of resource depletion and energy saving and emission reduction, the development technology of "urban mineral" has become one of the hotspots in the society. As an important part of "urban mineral resources", the recycling of waste plastics can not only make full use of limited resources to create considerable economic value, but also effectively prevent waste plastics from polluting the environment. It has obvious environmental and economic benefits. The separation of different kinds of plastics is a difficult point in the process of recycling and utilization of plastics. In this paper, packaging plastics, scrap plastics and electronic waste plastics are taken as research objects, and the parameters of floatation equipment are optimized by using self-made floatation equipment in laboratory. The floatability of plastics was controlled selectively by using the characteristics of different reagents soaking, the high efficient separation of mixed plastics was realized, and the flotation process of various waste mixed plastics was established, which provided technical support for recycling and utilization of waste plastics. In order to separate PET from plastic packaging waste, the effect of wetting liquid type and concentration on flotation effect was investigated. The results show that when 70mg/L sodium dodecyl sulfate is chosen as the wetting agent, the effect of first-order flotation PET/PVC/PC/PE is the best, in which PE is the floating-agent and the PC is the sinking material. When NaOH was used to modify PET/PVC/PC mixed plastics, 8mmol/L DBS was chosen as the wetting agent, the effect of secondary flotation separation of PET was the best, and the floatation rates of 96.44% PET and PC reached 92.91% and 97.45% respectively. The purity of PET obtained by two-stage flotation separation and recovery is 90.91%. The effects of the flow rate of flotation liquid, the pressure of dissolved gas tank and the concentration of wetting liquid on the flotation effect were investigated. The results show that when the flow rate of flotation liquid is 10 L / min at the pressure of 0.22 MPa, and the 蟻 (tannic acid) in the wetting liquid is 15 mg/L, the first stage flotation of PP (polypropylene) MPa, (acrylonitrile-butadiene-styrene) PC (polycarbonate) polyvinyl chloride (PVC) is the best. The floatation rates of PP and ABS are 100 and 98.63, respectively. The sinking rates of PC and PVC are 98.95 and 100, respectively. When the pressure of dissolved gas tank is 0, the flow rate of flotation liquid is 6 L / min, and the 蟻 (tannic acid) in wetting liquid is 10 mg/L, PP/ABS; was completely separated by secondary flotation when the flow rate was 10 L / min at the pressure of 0.24 MPa, 10 mg/L tannic acid and 10 mmol/L dibutyl sebacate were used in the wetting liquid, and the best floatation efficiency of PC/PVC was 92.87% and 91.41%. The final separation rate of PPS-ABSP-PC-PVC by two-stage flotation is 100 ~ 98.6392.87% and 91.41% respectively. In order to realize the flotation separation of PS/ABS mixed plastics, the effects of the type and concentration of wetting solution on the flotation effect were investigated. The results show that changing the type and concentration of wetting agent has great influence on the separation of PS/ABS. When 蟻 (tannic acid) in wetting solution is 40 mg/L, the floatation rates of PS and ABS regenerated plastics are 1.08% and 100, respectively. When 蟻 (sodium dodecyl sulfate) in wetting solution is 30mg/L, the best separation effect is achieved for PS and ABS electronic waste shell plastics. The sinking rate of PS is 100% and the floating rate of ABS is 98.5%. The IR spectrum analysis shows that the molecular structure of the three plastics is similar, which leads to similar floating rate, while the molecular structure of the recycled plastics and electronic waste shell plastics is different from that of the original plastics, and the hydrophilicity of the plastics is stronger than that of the original plastics. This is a key factor for the efficient separation of PS/ABS recycled plastics and electronic waste shell plastics.
【學(xué)位授予單位】:西南交通大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2016
【分類號】:X705
【相似文獻】
相關(guān)期刊論文 前10條
1 王志鏗,劉昕昕;酚的離子交換-浮選分離和測定[J];環(huán)境化學(xué);1989年05期
2 陳顯堂 ,張暉 ,王宗廷 ,王志鏗;浮選分離法的研究:鋅的泡沫浮選分離和分光光度法的測定[J];湖北民族學(xué)院學(xué)報(自然科學(xué)版);1993年00期
3 ;用選擇性抑制劑浮選分離塑料[J];湖南有色金屬;1997年05期
4 袁運波;高冰鎳浮選分離研究現(xiàn)狀及強化分選措施[J];江西冶金;1997年06期
5 吳利歡,趙建芬,王洪英;浮選分離法的研究Ⅺ:釩的沉淀浮選富集──溶劑浮選分離分光光度法的研究與應(yīng)用[J];肇慶學(xué)院學(xué)報;2000年02期
6 趙世民,王淀佐,胡岳華,徐競;松香及其衍生物在浮選分離中的應(yīng)用[J];礦冶工程;2002年03期
7 溫欣榮;硝酸鈉存在下碘化鉀-十六烷基三甲基氯化銨-水體系浮選分離鉛(Ⅱ)的研究[J];冶金分析;2003年02期
8 楊艷,高云濤,劉滿紅,黃偉清;硫酸銨-氯化亞錫-孔雀綠體系浮選分離鉑[J];貴金屬;2003年02期
9 吳艷平,陳松濤;氯化十六烷基吡啶鹽水體系浮選分離銅的研究[J];佛山科學(xué)技術(shù)學(xué)院學(xué)報(自然科學(xué)版);2004年01期
10 李成秀,王昌良;銅砷浮選分離的進展[J];國外金屬礦選礦;2005年09期
相關(guān)會議論文 前10條
1 吳艷平;靳慧霞;李良閣;;氯化十六烷基吡啶體系浮選分離鋅[A];中國化學(xué)會第八屆多元絡(luò)合物會議論文[C];2002年
2 許虹;吳艷平;;氯化十六烷基吡啶-硫氰酸銨-鹽水體系浮選分離銀的研究[A];第三屆全國微全分析系統(tǒng)學(xué)術(shù)會議論文集[C];2005年
3 金春雪;;光度法研究鈦與鉻、錳、釩、鋁、鎘、鎳和鐵的浮選分離[A];中國化學(xué)會第28屆學(xué)術(shù)年會第9分會場摘要集[C];2012年
4 李玉玲;;光度法研究鉍與鎂、鋯、鈾和鈰的浮選分離[A];中國化學(xué)會第27屆學(xué)術(shù)年會第08分會場摘要集[C];2010年
5 吳多吉;童雄;謝賢;;低堿條件下多金屬礦的浮選分離研究概述[A];復(fù)雜難處理礦石選礦技術(shù)——全國選礦學(xué)術(shù)會議論文集[C];2009年
6 王建斌;劉運杰;陳文科;;陜西旬陽汞銻共生礦浮選分離汞銻的工業(yè)試驗研究與實踐[A];“九五”全國地質(zhì)科技重要成果論文集[C];2000年
7 靳恒洋;王寬;彭小敏;;螢石與重晶石浮選分離試驗研究[A];2010'中國礦業(yè)科技大會論文集[C];2010年
8 魏明安;;復(fù)雜銅鉛鋅多金屬硫化礦浮選分離的研究特點及應(yīng)用研究[A];復(fù)雜難處理礦石選礦技術(shù)——全國選礦學(xué)術(shù)會議論文集[C];2009年
9 溫欣榮;;硝酸鈉存在下碘化鉀-氯化十六烷基吡啶-水體系浮選分離鉛的研究[A];中國化學(xué)會第八屆多元絡(luò)合物會議論文[C];2002年
10 謝瑞明;史自東;王明勝;程介克;;O—AS—DCN—OPB—N_2體系對鈧的浮選研究和應(yīng)用[A];中國地質(zhì)科學(xué)院南京地質(zhì)礦產(chǎn)研究所文集(40)[C];1989年
相關(guān)重要報紙文章 前3條
1 陳潔瑜;佛子沖礦浮選分離藥劑項目 獲得廣西科技進步二等獎[N];中國有色金屬報;2009年
2 本報記者 劉艾瑛 通訊員 吳碧波;銅鉛鋅硫化礦浮選分離難題獲解[N];中國礦業(yè)報;2014年
3 盛曉明 龔濤;金屬硫化礦浮選分離技術(shù)獲突破[N];中國有色金屬報;2009年
相關(guān)博士學(xué)位論文 前2條
1 高云濤;丙醇—鹽雙水相和鹽誘導(dǎo)浮選法分離貴金屬的研究[D];昆明理工大學(xué);2008年
2 魏明安;黃銅礦和方鉛礦浮選分離的基礎(chǔ)研究[D];東北大學(xué);2008年
相關(guān)碩士學(xué)位論文 前10條
1 郭進;城市礦產(chǎn)中廢塑料浮選分離技術(shù)研究[D];西南交通大學(xué);2016年
2 羅娜;菱錳礦與方解石浮選分離研究[D];中南大學(xué);2012年
3 李冠東;磷灰石與方解石浮選分離機理研究[D];昆明理工大學(xué);2010年
4 張麗榮;輝鉬礦電位調(diào)控浮選分離技術(shù)研究[D];東北大學(xué);2008年
5 魏茜;硫化銅鉛礦浮選分離研究[D];中南大學(xué);2012年
6 何建璋;可可托海鋰鈹浮選分離工藝與應(yīng)用研究[D];中南大學(xué);2014年
7 周清波;菱鋅礦與方解石浮選分離的研究[D];中南大學(xué);2010年
8 劉令;氯化鉀、氯化鈉浮選分離基礎(chǔ)研究[D];中南大學(xué);2013年
9 李闖;梅山鐵礦石中伴生礦物浮選分離特性研究[D];東北大學(xué);2009年
10 陳超;云母和高嶺石的浮選分離研究[D];北京有色金屬研究總院;2015年
,本文編號:2218876
本文鏈接:http://sikaile.net/shengtaihuanjingbaohulunwen/2218876.html