In this study, we burn the bamboo powder to know the mechanism of clinker. We carried out the mass change, mesh surface observation and also measured the adsorption amount and size of clinker. The following results were obtained. In the process of clinker formation, two stages were confirmed. Firstly, as the emission of volatiles from bamboo pyrolysis and their combustion at about 1000 K occurred, the metal oxides with low melting point and about 10 μm particles are adsorbed on the stainless steel mesh. Secondly, as char combustion at about 1200 K occurred, there could be two cases of clinker generate as follows. For case one, the small particles with low and high melting points deposit repeatedly and change to clinker in a large massive state. For the other case, lump is adsorbed by the high melting point oxide and small particles due to the low melting point oxide adhere so as to cover the giant lump and become huge.
