表面活性劑對多晶硅片線鋸屑中泡沫浮選分離硅粉和碳化硅粉的影響研究

目 錄
摘 要 Ⅰ
Abstract Ⅱ
1.引言 1
1.1 選題的意義及依據(jù) 1
1.2 硅材料背景 1
1.3國內(nèi)外的研究現(xiàn)狀 3
1.4國內(nèi)外市場分析 4
1.5 國內(nèi)市場展望 5
2.實驗 5
2.1實驗原理泡沫浮選法 5
2.2實驗儀器及樣品 6
2.3實驗方法 7
2.3.1線鋸砂漿的預(yù)處理方法 7
2.3.2實驗方案 7
2.3.3分析測試方法 8
3.實驗結(jié)果與討論 9
4.結(jié)論 12
參考文獻 12




表面活性劑對多晶硅片線鋸屑中泡沫浮選分離硅粉和碳化硅粉的影響研究

摘 要
多年來，由于化石燃料逐漸耗竭的危機局面，以及對生態(tài)環(huán)境的保護意識的提高，深切感到能源可持續(xù)發(fā)展的迫切。人們普遍認為太陽能系列電池是當(dāng)前最理想替代能源?；厥站€鋸屑中的高純硅，可以有效地降低光伏發(fā)電成本。多晶硅線鋸切割過程中產(chǎn)生大量的切割廢料。本文回顧了廢料回收主要局限于回收硅和碳化硅的現(xiàn)狀，然而廢料中的硅具有更大的回收價值。本實驗采用泡沫分離的方法達到提純目的，實驗結(jié)果表明：表面發(fā)泡劑不宜過多，分散劑效果不明顯；取10g線鋸屑廢料樣品（樣品含硅量14%），HF酸處理樣品后，加300ml去離子水，0.05g改性劑（十二烷基苯磺酸鈉）、0.5g分散劑（六次偏磷酸鈉）、80ml煤油為最佳方案，Si的純度可達63.4%。
關(guān)鍵詞： 線鋸屑 ； 泡沫浮選； 硅； 六偏磷酸鈉 ； 改性劑；氫氟酸


The Study of Effection the Surfactant Foam Flotation Separation of Si and SiC from Wire Sawdusts on the Polycrystalline Wafer
Abstract
Over the years, because of the gradual depletion of fossil fuel crisis situations, as well as people improving ecological and environmental protection awareness, deeply felt the urgency of sustainable energy development. It is widely believed solar cell is the best alternative energy sources at present. Recycling the high purity Si from wire sawdust, it can effectively reduce the cost of photovoltaic power. The current situation of recovering cutting slurry waste is reviewed in this paper. Most recovery methods only consider recovering Si and SiC, neglecting the more valuable silicon in the wire sawdust. In this study, I achieve purification purposes by the foam separation method. The experimental results show that: the surface foaming agent not be excessive; Take 10g wire sawdust samples (Sample silicon content 14%), handling with the sample by HF acid, then 300ml of deionized water, 0.05g fired agent(Sodium dodecylbenzenesulfonate), 0.5g dispersing agent(Six partial sodium), 80ml kerosene as the best solution, Si up to 63.4% purity.
Key words: wire sawdust; foam flotation; silicon; hexametaphosphate; Modifier;
hydrofluoric acid