CN101643332A - 一种粉煤灰的活化处理方法 - Google Patents
一种粉煤灰的活化处理方法 Download PDFInfo
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Abstract
一种粉煤灰的活化处理方法,属粉煤灰的加工技术领域,将粉煤灰放入搅拌机中,当粉煤灰温度达到110~150℃时,将铝酸酯偶联剂分三次一边搅拌,一边缓缓加入混合器,每次间隔2~5min,然后加入硬脂酸,继续搅拌15~20min;铝酸酯偶联剂的总加入量为粉煤灰重量的0.2~0.8%,硬脂酸的加入量为粉煤灰重量的0.4~1.65%。本发明经优化设计和反复试验比较,选用铝酸酯偶联剂和硬脂酸作为活化剂,并合理限定其加入量,对作为原料的粉煤灰进行活化处理,可有效防止制成后人造沥青中粉煤灰的离析。同时也由于改善了粉煤灰与人造沥青中其他组分的相容性,因而显著地提高了人造沥青的各项路面性能。
Description
技术领域
本发明涉及一种粉煤灰的活化处理方法,属粉煤灰的加工技术领域。
背景技术
随着国民经济的高速增长,交通基础设施建设也得到了迅猛的发展,国内公路通车里程每年增加数万公里,由此引起道路建设用材日趋紧缺。其中特别是建设高等级道路用的结合料沥青,因为来源于石油,而石油是不可再生的资源,沥青必将供不应求。为实现公路交通的可持续发展,必须努力寻找沥青的替代品。现在以废旧橡胶,重油和粉煤灰为主要原料生产的人造沥青已基本试制试用成功,但是,粉煤灰是一种原煤燃料时排放的无机废弃物,与烃类有机物的相容性极差,至使高温状态下贮存的人造沥青会迅速发生离析、沉淀,除非现做现用,否则会严重降低应用价值。为保证人造沥青的体系稳定,必须先对粉煤灰进行活化处理,用以改善粉煤灰与人造沥青烃类有机物组分的相容性。
发明内容
本发明的目的是提供一种配方设计合理,能有效提高粉煤灰对于有机烃类物质相容性的粉煤灰的活化处理方法。
本发明为一种粉煤灰的活化处理方法,其特征在于将粉煤灰放入搅拌机中,当粉煤灰温度达到110~150℃时,将铝酸酯偶联剂分三次一边搅拌,一边缓缓加入混合器,每次间隔2~5min,然后加入硬脂酸,继续搅拌15~20min。
所述铝酸酯偶联剂的总加入量可为粉煤灰重量的0.2~0.8%。
所述硬脂酸的加入量可为粉煤灰重量的0.4~1.65%。
所述的粉煤灰可为经过干燥处理后含水量低于0.2%的粉煤灰,平均比表面积为300~800m2/kg。
本发明经优化设计和反复试验比较,选用铝酸酯偶联剂和硬脂酸作为活化剂,并合理限定其加入量,对作为原料的粉煤灰进行活化处理,铝酸酯偶联剂作为粉煤灰与人造沥青中有机组分之间的“分子桥”,使两种组分紧密地结合在一起;硬脂酸的作用是协同铝酸酯偶联剂活化粉煤灰表面,可有效防止制成后人造沥青中粉煤灰的离析。同时也由于改善了粉煤灰与人造沥青中其他组分的相容性,因而显著地提高了人造沥青的各项路面性能,对于拓展人造沥青在公路建设中的应用前景,具有十分重要的作用。
具体实施方式
为了更好地理解本发明,下面结合实施例进一步阐明本发明的内容,但本发明的内容不仅仅局限于下面的实施例。
本发明的下述实施例选用的人造沥青中各组分的重量配比为:废胶粉∶废塑料∶重油∶粉煤灰∶再生剂=35∶5∶40∶30∶0.2。
表1:比表面积为300~400m2/kg粉煤灰的人造沥青主要技术性能
表2:比表面积为500~600m2/kg粉煤灰的人造沥青主要技术性能
表3:比表面积为700~800m2/kg粉煤灰的人造沥青主要技术性能
从表1到表3可以看出:作为制造人造沥青原料之一的粉煤灰,其比表面积的大小与人造沥青的各项技术性能和表面活化剂掺量有十分明显的影响,比表面积大,各项性能相应提高,但铝酸酯偶联剂和硬脂酸的掺量也要相应增加。
Claims (4)
1、一种粉煤灰的活化处理方法,其特征在于将粉煤灰放入搅拌机中,当粉煤灰温度达到110~150℃时,将铝酸酯偶联剂分三次一边搅拌,一边缓缓加入混合器,每次间隔2~5min,然后加入硬脂酸,继续搅拌15~20min。
2、按权利要求1所述的一种粉煤灰的活化处理方法,其特征在于所述铝酸酯偶联剂的总加入量为粉煤灰重量的0.2~0.8%。
3、按权利要求1所述的一种粉煤灰的活化处理方法,其特征在于所述硬脂酸的加入量为粉煤灰重量的0.4~1.65%。
4、按权利要求1所述的一种粉煤灰的活化处理方法,其特征在于所述的粉煤灰为经过干燥处理后含水量低于0.2%的粉煤灰,平均比表面积为300~800m2/kg。
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109880371A (zh) * | 2019-03-14 | 2019-06-14 | 深圳市亮一方光电有限公司 | 基于粉煤灰的大功率led导热硅脂材料及其制备方法 |
CN111909428A (zh) * | 2020-07-29 | 2020-11-10 | 贵州仁宜智科技有限公司 | 一种超细粉体补强橡胶及其制备方法和应用 |
CN116145474A (zh) * | 2023-02-28 | 2023-05-23 | 光大国信环保科技(北京)有限公司 | 一种瓦楞纸填充材料及改性粉煤灰材料的制备方法 |
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109880371A (zh) * | 2019-03-14 | 2019-06-14 | 深圳市亮一方光电有限公司 | 基于粉煤灰的大功率led导热硅脂材料及其制备方法 |
CN111909428A (zh) * | 2020-07-29 | 2020-11-10 | 贵州仁宜智科技有限公司 | 一种超细粉体补强橡胶及其制备方法和应用 |
CN116145474A (zh) * | 2023-02-28 | 2023-05-23 | 光大国信环保科技(北京)有限公司 | 一种瓦楞纸填充材料及改性粉煤灰材料的制备方法 |
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