回收无碳复写废纸最佳工艺条件的优化

Optimization of the Process Conditions for Recovering Carbon-free Waste Paper

对回收无碳复写废纸工艺进行了最佳工艺条件的优化实验。结果表明 :影响回收纸浆白度的因素主要有碎解温度、碎解时间、熟化时间、脱墨剂用量、洗涤次数 ;影响大小依次是碎解温度 >脱墨剂用量 >洗涤次数 >碎解时间 >熟化时间 ;最佳条件为碎解温度 70℃ ,碎解时间 60 min,脱墨剂用量 0 .3%～ 0 .4% ,熟化时间 2 0 min,洗涤次数 2～ 3次。在该条件下对无碳复写废纸脱墨的纸浆白度可达 87.67% ,比同类产品的 84.1 0 %高出 3.5 7%。

The process conditions for recovering carbon free waste paper were optimized.The results showed that the influence factors on whiteness of pulp were breaking temperature,breaking time,ageing time,amount of deinking agent and times of washing.The order of influence was breaking temperature>amount of deinking agent>times of washing>breaking time>ageing time.The obtained optimum conditions were breaking temperature 70 ℃,breaking time 60 min,amount of deinking agent 0.3 %～0.4 %,ageing time 20 min,times of washing 2～3.Under above conditions,the whiteness of pulp can reach 87.67 %,which is 3.57 % higher than that of the same kind of product.