PURPOSE: To obtain a highly stabilized mixed fuel in high energy efficiency with low grinding power, by mixing a dry-ground solid fuel and oil, expelling the air contained in the mixture followed by adding a surfactant to the resulting mixture.
CONSTITUTION: A solid fuel such as coal, petroleum coke, charcoal is ground in a dry state to result in such a size that, for example, its 200 mesh-passable fraction falls between 70 and 80%, followed by admixing an oil with the fraction in such an amount so that the weight ratio of the former to the latter is normally 1. The resulting mixture is then deaerated in such a way as to allow to stand in a tank with an opening or to suction the air in the tank by a vacuum pump, followed by admixing a surfactant with the mixture deaerated, thus obtaining the objective fuel.
OGAWA KOUJI
USAMI MASAHIRO
