| abstract |
[PROBLEMS] To reduce industrial waste from the viewpoint of environmental protection, handling of incinerated ash is a problem. To provide a papermaking filler that can be reused for internal paper use and a method for producing the same by using incinerated ash as a raw material and treating the incinerated ash by a relatively simple process. Also, provide a paper comprising such a papermaking filler. The raw material is heat-treated at a temperature of 700 to 800 ° C., and then the pH is adjusted using sulfuric acid and / or aluminum sulfate, whereby a papermaking filler having excellent wire wear resistance can be obtained. [Selection] Figure 1 |