省エネルギーからみた古紙の利用

抄録

The amount of consumption of waste paper has reached 42% of the raw materials for paper making and due to that the great contribution has been made to energy saving.
The use of waste paper as raw materials has expanded from paper board and toilet paper to writing paper, printing paper and others.
Under such condition, each system has been developed according to the strong demands for clean waste paper pulp.
It presentated about the trends of various systems for phased pre-slushing and pre-deflaking, pre-screening and cleaning, high concentration of pulp consistency and others to get the clean pulp with a little energy consumption.
Also presentated about thermal insulation of fiber, plastic fiber board and fuel pellets be sides paper making materials as other way of utillization of waste paper for energy saving.