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| 竹浆碱回收绿液铝盐法除硅研究 |
| Silicon Removal from Green Liquor with Aluminum Salt in the Alkali Recovery Process of Bamboo Pulping |
| 收稿日期： |
| DOI：10.11980/j.issn.0254-508X.2013.01.001 |
| 关键词: 竹材 除硅 绿液 铝盐 |
| Key Words:bamboo silicon removal green liquor aluminum salt |
| 基金项目:本课题由“十二五”国家科技支撑计划项目课题“高效竹材制浆造纸及其剩余物利用新技术研究与示范”(2012BAD23B02)；国家自然科学基金(20876092)；陕西科技大学学科带头人培育计划项目(20876092)资助。 |
| 作者 | 单位 | | 徐永建1,2,3 | 1.陕西科技大学造纸工程学院,陕西省造纸技术及特种纸品开发重点实验室,教育部轻化工助剂重点实验室,陕西西安，710021；2.陕西科技大学材料科学与工程博士后流动站,陕西西安，710021；3.贵州赤天化集团有限责任公司,贵州赤水，564700 | | 张永奇1 | 1.陕西科技大学造纸工程学院,陕西省造纸技术及特种纸品开发重点实验室,教育部轻化工助剂重点实验室,陕西西安，710021； | | 朱振峰2 | 2.陕西科技大学材料科学与工程博士后流动站,陕西西安，710021 | | 易贻端3 | 3.贵州赤天化集团有限责任公司,贵州赤水，564700 |
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| 摘要:研究了竹浆绿液铝盐法除硅效果及其对绿液的影响,并通过能谱分析对铝盐绿液除硅机理进行了初步探讨。结果表明，铝盐添加到绿液中可有效降低绿液的硅含量,随着铝盐用量的增加,除硅率不断提高,当铝盐用量与绿液硅含量的摩尔比为1∶1时,除硅后竹浆绿液硅含量为1.13 g/L,除硅率达到了74%。SEM-EDAX结果表明，沉淀物中含有Al、Na、O、Si等元素,可能是铝盐与绿液中的硅生成了硅铝酸钠沉淀,这是绿液中硅含量降低的主要原因。 |
| Abstract:The high silicon content in green liquor of bamboo pulping hinders alkali recovery and recycling of lime mud. The desilication of green liquor with aluminum salt in alkali recovery process of bamboo pulping was investigated in this paper. The desilication mechanism of aluminum salt was also discussed. The results showed that the desilication rate increased rapidly with increasing the dosage of aluminum salt. The desilication rate of the green liquor increased to 74% when the ratio of aluminum salt and silicon content in green liquor was 1∶1（mol/mol）. Silicon content in green liquor decreased to 1.13 g/L. The results of SEM-EDAX analysis indicated that silicon in the green liquor reacted with aluminum salt and formed sodium aluminosilicate precipitation. This was the reason of silicon content decrease in the green liquor. |
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