| With the growth of population, social development and the acceleration of urbanization, municipal solid wastes(MSW) output is increasingly high.How to handle the MSW problem is very important. As a new technique of handling MSW, refuse derived fuel (RDF) from municipal solid wastes draws much attention in many countries.In this paper, the synthesis of RDF was studied. It was found that, in the hot-air drying process, with the hot-air temperature increased, thickness of potato blocks reduced, air velocity increased and air humidity decreased, the drying rate became higher and the drying time decreased.In the synthesis process of RDF, CaO was added as a chlorine removal agent. It was found that the removal of chlorine was significant with the addition of CaO into RDF. The mass ratio of CaO added into MSW is about 2.7 %. RDF synsthesis process used in pilot scale equipment was similar to J-carerl process and the rotary dryer's reasonable drying parameters of hot-air temperature was 140℃, material mass was 5～7.5 kg, air velocity was 2.6 m/s and rotational velocity was 5 r/ min. All equipments run well, some sections need to be improved. Physicochemical properties, combustion characteristics and pyrolysis characteristics of RDF were analysed. It was proved that, the RDF weight was reduced in about three stages during it's combustion and pyrolysis process, the first and second stage was attributed to the decompose of volatile matter and fixed carbon. The combustion and pyrolysis process of RDF could be expressed by three first-order reactions. The combustion rate of RDF was higher than the pyrolysis rate and the weight loss rate of combustion was more than the rate of pyrolysis.
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