摘要
竹材中硅物质含量较多,影响碱回收工序的顺利进行,对白泥的回收利用也有不利影响。结合贵州赤天化纸业年产 20 万 t 汽-液两相双塔连续蒸煮器生产硫酸盐竹浆的生产工艺,研究竹子蒸煮过程中硅的溶出规律,以及两种留硅剂在竹浆蒸煮同步留硅的效果。研究发现竹材原料中的硅主要在蒸煮浸渍段溶入到黑液中,浸渍段的溶出率为 48.0%,蒸煮段的溶出率为 22.4% ;两种留硅剂都可有效地将硅留在纸浆中,以含钙化合物为主要成分的留硅剂的留硅效果更明显;两种留硅剂组合协同留硅效果优于单独添加的留硅效果;在浸渍段、蒸煮段依次添加以含钙化合物、含铝化合物为主要成分的留硅剂,其用量分别为 2% 和 0.12%,蒸煮后纸浆中的硅含量为 0.6798%,黑液中的硅含量为 0.156 6 g·L-1,与未添加留硅剂的空白样相比较,黑液中的硅含量降低了 77.54%。
The high silicon content in green liquor of bamboo pulping hindered the progress of alkali recovery and the recycling of lime mud. The silica dissolution law of bamboo pulping in cooking was investigated. The desilication effect of two types of siliconremain agent were also studied. The results showed that the dissolution rate of silica from raw material in the impregnated stage is more higher than that of the cooking stage. The ratio of silicon dissolution was 48.0% in the impregnated stage and 22.4% in the cooking stage. Two types of silicon-remain agent both exhibited silicon-remain effect. The effect of combination of two types of silicon-remain agent is better than the agent separately added in the impregnated stage. Optimized bamboo simultaneous silicon- remain cooking technology as follows： when the ratio of the silicon-remain agent which main component is a calcium-containing compound was 2% in the impregnated stage, and the ratio of the silicon-remain agent which main component is a aluminumcontaining compound is 0.12% in the cooking stage, the total desilication rate is 77.54%, there is 0.6798% silica content in bamboo pulp.
出处
《纸和造纸》
北大核心
2012年第11期1-4,共4页
Paper and Paper Making
基金
国家"十二五"科技支撑计划项目(2012BAD23B02)
国家自然科学基金(20876092)
关键词
竹浆
蒸煮同步留硅
黑液
bamboo pulp
silica-remined
black liquor
