| abstract |
(57) [Abstract] [Purpose] Trees such as pachinko machines and slot machines, Achieves both effective use of resources and resource saving of products composed of materials such as metals and plastics, and helps prevent environmental destruction due to landfill, etc., and waste such as pachinko machines and slot machines. It is an object of the present invention to provide an effective technology that does not cause the operation failure of the rotary kiln and the calcining furnace when effectively utilizing the cement for cement production. [Composition] A cement manufacturing method for combusting wastes of products composed of materials such as wood, metal and plastics for effective use in cement production, comprising a crushing step of crushing the wastes and crushing. A cement manufacturing method comprising: a metal removal step for removing metal content from a material; and a combustion step for removing crushed pieces having a size of 13 to 30 mm into a rotary kiln inlet of a cement manufacturing apparatus and burning them. |