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Effects of Insoluble Material in Green Liquor on Optical Properties of Lime Mud from Straw Pulping Chemical Recovery
  
DOI：10.11980/j.issn.0254-508X.2013.09.004
Key Words:alkali recovery lime mud  whiteness  green liquor  straw pulp  insoluble materials
Fund Project:本课题得到国家“十二五”科技支撑项目(项目编号2012BAD-23B02)和制浆造纸工程国家重点实验室项目(项目编号201153)的资助。
Author NameAffiliation
王　建1,2 1.陕西科技大学轻工与能源学院,陕西西安,710021；2.华南理工大学制浆造纸工程国家重点实验室,广东广州,510640 
张　丹1 1.陕西科技大学轻工与能源学院,陕西西安,710021 
刘燕婷1 1.陕西科技大学轻工与能源学院,陕西西安,710021 
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Abstract:When the lime mud from chemical recovery is used as filler, its application scope and utilization amount are limited by its shortcomings of lower whiteness. In order to improve the whiteness of lime mud, the effect of insoluble materials in green liquor on whitness of lime mud was studied. The results showed that insoluble materials in green liquor was the key factor affecting the whiteness of lime mud. The more content of insoluble materials, the lower whiteness of lime mud. When insoluble materials were removed from the green liquor by filtration, the whiteness of lime mud was increased by 7.9 points. At the same time, reducing the content of insoluble materials in green liquor was significent for reduceing the whiteness difference between lime mud and market PCC.
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