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| Synchronous Reduction of Alkali Content in High Alumina Fly Ash by Pre-desilication |
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Received:November 06, 2013
Revised:November 12, 2013
Accepted:November 12, 2013
Published Online:April 22, 2014
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| DOI：10.3969/j.issn.1007-7545.2014.05.006 |
| KeyWord:high alumina fly ash; pre-desilication; chemical alkali; alumina-silica ratio |
| Author | Institution |
| GONG Yan-bing |
大唐国际高铝煤炭资源开发利用研发中心 |
| SUN Jun-min |
大唐国际高铝煤炭资源开发利用研发中心 |
| ZHANG Sheng |
大唐国际高铝煤炭资源开发利用研发中心 |
| ZHANG Zhan-jun |
大唐国际高铝煤炭资源开发利用研发中心 |
| Yang Hui-bin |
大唐国际高铝煤炭资源开发利用研发中心 |
| WANG Yong |
大唐国际高铝煤炭资源开发利用研发中心 |
| WANG Na |
大唐国际高铝煤炭资源开发利用研发中心 |
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| Abstract: |
| The regulation rules and controlling mechanism of synchronous reduction of alkali content in high alumina fly ash by pre-desilication were studied. The results show that sodium oxide content of high aluminum fly ash after desilication is 2.8%, alumina-silica ratio rises from 1.3 to 2.12, silicon oxide leaching rate is 39.4%, and alumina leaching rate is 0.6% under the optimum conditions including temperature of 90 ℃, Na2O concentration of 120 g/L, reaction time of 2.5 h, and ratio of liquid to solid of 3∶1. After desilication pretreatment, the lowest alkali content in high alumina fly ash and maximum desilication efficiency are achieved. |
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