In recent years, with the continuous increase of environmental protection, the traditional industry of pulp and paper has been greatly reduced while the waste recycling paper has been improved. Industry demand makes the rapid rise of waste recycled paper industry. 

Although the replacement of the original paper by the recycled paper has brought some environmental protection effects, but due to the different recycling ways and quality of waste paper, the recycled waste paper may be mixed with other impurities in the production process of recycled paper, which produces a large number of solid waste referred as recycled paper residue. Recycled paper residue can be divided into two categories: coarse material and fine material. 

Coarse material is mainly from the stage of pulping and slag removing, which most of them is pulper ropes. It contains about 45% metal and 55% waste material, which is highly compressed and difficult to shred. The fine material mainly comes from the cleaning and screening stage, can be divided into light reject and heavy reject. After reasonable processing, most of the waste residue after screening will be used in the application fields of incineration power generation, metal recycling and plastics regeneration, etc.

Harden has cooperated with paper mill customers with many successful cases and created a number of efficient waste paper processing lines. The metal, plastic, and pulp in the material are separated through the shredding and recycling system so that the metal can be reused, plastics can be used for re-granulation and pulp can be used as raw material for recycled paper, to realize the resource regeneration and protect the environment.