多晶硅废渣蒸压砖的制备及其性能研究
发布时间：2018-07-20 20:06
【摘要】：多晶硅废渣是生产多晶硅过程中产生的固体废弃物。目前国内多晶硅废渣主要以堆存和简易填埋的方式处理,不仅严重环境污染环境,而且占用了大量土地资源,同时也会加大企业运营成本。本文在蒸压条件下通过碱激发原理,研究以多晶硅废渣为主要原料制备新型墙体材料(MU10和MU25多晶硅废渣蒸压砖)的关键技术。这将对我国固体废弃物的资源化利用、环境保护和新型墙体材料开发具有十分重要意义。本文系统研究了不同原材料掺量、成型工艺、消化时间和蒸压工艺等关键参数对多晶硅废渣蒸压砖的力学性能作用规律；探索了多晶硅废渣蒸压砖强度产生的机理；测试和分析多晶硅废渣蒸压砖的耐久性能。研究结果表明：1.以多晶硅废渣、石灰、砂子和水为原材料,经过搅拌、消化、压制成型、蒸压等工艺制备了MU10多晶硅废渣蒸压砖,经优化的最佳配比为,多晶硅废渣：石灰：河砂=40：10：50,水料比为15%,消化3h,成型压力17MPa,蒸压温度为180℃,蒸压时间为6h,可制得平均抗压强度为11.5MPa的制品,满足GB11945-1999《蒸压灰砂砖》中MU10等级的各项力学指标。2.为了提高力学强度,在MU10多晶硅废渣蒸压砖研究的基础上,尝试用粉煤灰作为活性增强相,系统研究了以多晶硅硅废渣、粉煤灰、石灰和砂子为原材料,经过轮碾搅拌、消化、压制成型、蒸压等工艺制备MU25多晶硅废渣蒸压砖的技术,经优化的最佳配比为,多晶硅废渣：粉煤灰：石灰：河砂=13：27：10：50,水料比为22.1%,消化时间为5h,成型压力15MPa,蒸压温度为170℃,蒸压时间为5h,可制得平均抗压强度为27.8MPa的制品,满足GB 11945-1999《蒸压灰砂砖》中MU25等级的各项力学指标。3.MU10多晶硅废渣蒸压砖平均密度为1450kg/m3,吸水率为27.3%,软化系数为0.68,抗冻融性较差；MU25多晶硅废渣蒸压砖的平均密度为1700kg/m3,吸水率为22.5%,软化系数为0.84,抗冻融性优异;MU10和MU25多晶硅废渣蒸压砖,碳化后强度均有提高,均无石灰爆裂与泛霜现象。4.多晶硅废渣中的单质硅与Ca(OH)2在高温高压条件下能够发生发应,生成纳米纤维状产物,其红外特征吸收峰为981cm-1,推测为非晶态。5.MU25多晶硅废渣蒸压砖的水化产物主要为托勃莫来石、硬钙硅石和钙沸石。
[Abstract]:Polysilicon residue is a solid waste produced during the production of polysilicon. At present, the domestic polysilicon waste residue is mainly treated by storage and simple landfill. It not only seriously pollutes the environment, but also occupies a large amount of land resources, but also increases the operation cost of enterprises. Polysilicon residue is the key technology for the preparation of new wall materials (MU10 and MU25 polysilicon residue autoclave). This will be of great significance to the resource utilization, environmental protection and new wall material development of solid waste in China. This paper has systematically studied the content, molding process, digestion time and autoclave of different raw materials. Process and other key parameters on the mechanical properties of the polysilicon residue autoclaved brick; the mechanism of the strength of the polysilicon residue autoclaved brick was explored and the durability of the polysilicon residue autoclaved brick was tested and analyzed. The results showed that 1. with the polysilicon residue, lime, sand and water as raw materials, it was stirred, digested and pressed. MU10 polysilicon residue autoclave was prepared by the process of autoclave. The optimal optimum ratio is: polysilicon waste residue: Lime: river sand =40:10:50, water material ratio 15%, digestion 3h, molding pressure 17MPa, autoclave temperature 180, 6h, and the average compressive strength 11.5MPa products, satisfying GB11945-1999< autoclave sand brick > MU1 In order to improve the mechanical strength of the 0 grade.2., in order to improve the mechanical strength, on the basis of the research of MU10 polysilicon residue autoclave, the fly ash is used as the active phase. The polysilicon waste, the pulverized coal ash, the lime and the sand are used as the raw material to prepare the MU25 polysilicon waste by wheel milling, digestion, pressing molding and autoclaving. The best optimum ratio of slag autoclave is polysilicon waste: Fly Ash: Lime: Lime: river sand =13:27:10:50, water material ratio is 22.1%, digestion time is 5h, molding pressure 15MPa, autoclave temperature 170, and autoclave time 5h, the average compressive strength is 27.8MPa, satisfies GB 11945-1999< autoclaved sand brick > MU25. The average density of the.3.MU10 polysilicon residue autoclave is 1450kg/m3, the water absorption rate is 27.3%, the softening coefficient is 0.68, the freezing thawing resistance is poor, the average density of the MU25 polysilicon residue autoclave is 1700kg/m3, the water absorption rate is 22.5%, the softening coefficient is 0.84, the freezing thawing resistance is excellent, MU10 and MU25 polysilicon residue steamed brick, carbonization The post strength can be improved, no lime blowout and frosting phenomenon.4. polysilicon and Ca (OH) 2 can occur at high temperature and high pressure, which can produce nanofiber products and its infrared characteristic absorption peak is 981cm-1. It is speculated that the hydration products of non crystalline.5.MU25 polysilicon waste residue autoclave are mainly tobro mullite and hard calcium. Silica and calcium zeolite.
【学位授予单位】：东南大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TU522.1
本文编号：2134626
[Abstract]:Polysilicon residue is a solid waste produced during the production of polysilicon. At present, the domestic polysilicon waste residue is mainly treated by storage and simple landfill. It not only seriously pollutes the environment, but also occupies a large amount of land resources, but also increases the operation cost of enterprises. Polysilicon residue is the key technology for the preparation of new wall materials (MU10 and MU25 polysilicon residue autoclave). This will be of great significance to the resource utilization, environmental protection and new wall material development of solid waste in China. This paper has systematically studied the content, molding process, digestion time and autoclave of different raw materials. Process and other key parameters on the mechanical properties of the polysilicon residue autoclaved brick; the mechanism of the strength of the polysilicon residue autoclaved brick was explored and the durability of the polysilicon residue autoclaved brick was tested and analyzed. The results showed that 1. with the polysilicon residue, lime, sand and water as raw materials, it was stirred, digested and pressed. MU10 polysilicon residue autoclave was prepared by the process of autoclave. The optimal optimum ratio is: polysilicon waste residue: Lime: river sand =40:10:50, water material ratio 15%, digestion 3h, molding pressure 17MPa, autoclave temperature 180, 6h, and the average compressive strength 11.5MPa products, satisfying GB11945-1999< autoclave sand brick > MU1 In order to improve the mechanical strength of the 0 grade.2., in order to improve the mechanical strength, on the basis of the research of MU10 polysilicon residue autoclave, the fly ash is used as the active phase. The polysilicon waste, the pulverized coal ash, the lime and the sand are used as the raw material to prepare the MU25 polysilicon waste by wheel milling, digestion, pressing molding and autoclaving. The best optimum ratio of slag autoclave is polysilicon waste: Fly Ash: Lime: Lime: river sand =13:27:10:50, water material ratio is 22.1%, digestion time is 5h, molding pressure 15MPa, autoclave temperature 170, and autoclave time 5h, the average compressive strength is 27.8MPa, satisfies GB 11945-1999< autoclaved sand brick > MU25. The average density of the.3.MU10 polysilicon residue autoclave is 1450kg/m3, the water absorption rate is 27.3%, the softening coefficient is 0.68, the freezing thawing resistance is poor, the average density of the MU25 polysilicon residue autoclave is 1700kg/m3, the water absorption rate is 22.5%, the softening coefficient is 0.84, the freezing thawing resistance is excellent, MU10 and MU25 polysilicon residue steamed brick, carbonization The post strength can be improved, no lime blowout and frosting phenomenon.4. polysilicon and Ca (OH) 2 can occur at high temperature and high pressure, which can produce nanofiber products and its infrared characteristic absorption peak is 981cm-1. It is speculated that the hydration products of non crystalline.5.MU25 polysilicon waste residue autoclave are mainly tobro mullite and hard calcium. Silica and calcium zeolite.
【学位授予单位】：东南大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TU522.1
【参考文献】
相关期刊论文 前10条
1 李涤飞;;固体废弃物在新型墙体材料中的资源化利用[J];黑龙江科技信息;2016年03期
2 王荃;;灰砂砖泛霜研究[J];建设科技;2015年15期
3 高子栋;潘红;;利用油页岩灰制备蒸压砖的试验研究[J];砖瓦;2015年06期
4 申晋益;董事尔;黄秋爽;;我国现代节能墙体材料的革新与发展趋势[J];建筑经济;2015年06期
5 陈鳌聪;魏转花;;蒸压制度对金尾矿加气混凝土性能的影响[J];新型建筑材料;2015年01期
6 黄凤会;周宗辉;张军华;程新;;成型压力对废弃物基地质聚合物制品性能的影响[J];烟台大学学报(自然科学与工程版);2014年01期
7 陈其国;高建;;流化床法制备粒状多晶硅研究进展[J];氯碱工业;2014年01期
8 李庆繁;;“饱和系数”在烧结砖中的应用及其机理探讨[J];墙材革新与建筑节能;2013年03期
9 胡泊;辛颂旭;白建华;张运洲;;我国太阳能发电开发及消纳相关问题研究[J];中国电力;2013年01期
10 王恩俊;武锦涛;银建中;赵建;;太阳能级多晶硅生产工艺的现状与发展[J];当代化工;2012年12期
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