脱墨浆FAS漂白工艺与成本的优化

Optimizing the Technology and Cost of DIP Bleaching with FAS

关键词:  脱墨浆  配比  白度

Key Words:DIP  stock composition  brightness

摘要:优化了脱墨浆(DIP)的FAS漂白工艺与成本，当碱比（m（NaOH）∶m（FAS））控制为0.5时，漂白效果最好；当FAS用量小于0.75%(对绝对浆)时，漂白浆的白度随着FAS用量的增加而提高，且其白度增幅没有因FAS用量的增加而显递减趋势；对脱墨浆车间而言，为了获得较高的送浆白度，如果贮浆塔液位较低，应使贮浆塔的浆料温度为70℃、如果液位适中或偏高，应使贮浆塔的浆料温度为60℃；如果将浆料温度提高5℃，在达到相同的浆料白度的情况下，FAS的用量可减少0.065%。

Abstract:The technology and cost of DIP bleaching with FAS were optimized，the best bleaching result was obtained when the ratio of NaOH/FAS was 0.5. Brightness of pulp increased constantly with FAS dosage increasing when FAS amount was less than 0.75%. In order to deliver higher brightness pulp，the temperature of the pulp in storage tank ought to be 70℃ if the pulp level was low; otherwise the temperature of the pulp ought to be 60℃ if the pulp level was in middle or high. The same brightness and bleaching cost could be obtained when FAS dosage decreased 0.065% if temperature of the pulp increased 5℃.