Novel process and novel formula for agglomerating powders, all the mineral or vegetable fine or coarse, and in particular, the mineral or vegetable charcoal and of transforming briquettes, balls or ovoid, solid, resistant to water, and this without the help of the cement, or any of the pitch of the bituminous material or tarry, that is - to - say giving rise to the combustion or more of the odor or more of smoke or more of ash that the natural them - same