稻草浆蒸煮同步除硅降低黑液黏度技术

Black Liquor Viscosity Reduction by Removing Silica Interference

在蒸煮稻草的过程中,分别加入氧化铝、氧化镁、氧化钙,使其同溶出的硅发生反应生成某种物质留在纤维中,以减少黑液中硅质量分数,降低黑液黏度,消除或降低"硅干扰"。结果表明:加入3%～5%除硅剂后,黑液中硅质量分数降低,最大降幅达84.39%;黑液黏度最大下降幅度为16.7%,而纸浆中硅质量分数有大幅度提升。

In this study, oxides such as Al2O3, MgO and CaO, were added to the cooking liquor of rice straw in soda-AQ pulping process, respectively. These oxides reacted with silicon to generate a kind of substance, which remained in the fibers ; therefore, the content of silicon in the black liquor declined. Results showed that, in the seda-AQ pulping process, adding 3% to 5% oxides could significantly decrease the silicon content in straw black liquor, and the maximum decreasing amplitude reached 84.39% ; black liquor viscosity almost decreased by 16.7%, and the silicon content in pulp also increased obviously.