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竹浆碱回收绿液铝盐法除硅研究 被引量:10

Silicon Removal from Green Liquor with Aluminum Salt in the Alkali Recovery Process of Bamboo Pulping
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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。 The high silicon content in green hquor 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 a- luminum 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 hquor decreased to 1.13 g/L. The results of SEM-EDAX analysis indicated that silicon in the green liquor re- acted with aluminum salt and formed sodium aluminosilicate precipitation. This was the reason of silicon content decrease in the green liquor.
出处 《中国造纸》 CAS 北大核心 2013年第1期1-4,共4页 China Pulp & Paper
基金 "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
关键词 竹材 除硅 绿液 铝盐 bamboo silicon removal green liquor aluminum salt
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