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Bamboo Cooking with Simultaneous Desilication of the Black Liquor by Using Calcium & Aluminate Salts
  
DOI：10.11980/j.issn.0254-508X.2015.08.004
Key Words:simultaneous silicon-remove cooking  bamboo pulping black liquor  scaling
Fund Project:本项目由国家十二五科技支撑计划项目(2012BAD23B02)、国家自然科学基金(20876092)、陕西科技大学学术带头人团队基金项目(2013XSD25)资助。
Author NameAffiliation
徐永建1 1.陕西科技大学轻工与能源学院,陕西省造纸技术及特种纸品开发重点实验室, 陕西西安， 710021 
章伟鹏1 1.陕西科技大学轻工与能源学院,陕西省造纸技术及特种纸品开发重点实验室, 陕西西安， 710021 
张鼎军2 2.贵州赤天化纸业股份有限公司, 贵州赤水, 564700 
林　涛1 1.陕西科技大学轻工与能源学院,陕西省造纸技术及特种纸品开发重点实验室, 陕西西安， 710021 
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Abstract:In this paper, the effects of calcium and aluminate salts on simultaneous desilication of the black liquor in bamboo pulping were studied. Furthermore, the influence of residual calcium and aluminum ions in black liquor on the scaling properties of the black liquor was evaluated. The results showed that it was effective to remove silica from the black liquor using calcium oxide and sodium aluminate in the cooking process. The desilication effect of sodium aluminate was better than that of calcium oxide. The silica concentration was 0.36 mg/L in the black liquor and desilication rate was 68.19% when sodium aluminate dosage was 1.5% (on oven dried saw material). Some soluble calcium ions remained in the black liquor when calcium oxide was used which negatively affected the scaling properties of the black liquor. Using aluminate salts as desilication agent had high silica removal efficiency, the content of aluminum ions in the black liquor was very low which would not influence the scaling property of the black liquor.
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