Method for industrial production of especially fine powders

A method for industrial production of especially fine powders and mineral powders, where the material to be ground is mixed to a gas-solid matter suspension, which through acceleration nozzles is led at least to two counter jets, which meet in grinding chamber for further grinding of the powders contained in the jets, wherein the ground gas-solid matter suspension is led in its turn, by means of a working gas through at least to two intermediate containers in the grinding circulation, in the at least two intermediate containers, the gas is removed from the mixture, and wherein into a first one of the two intermediate containers, a certain quantity of solid matter is collected, which quantity is returned to be ground and led to a second one of the at least two intermediate containers and said quantity is circulated through the grinding process among the at least two intermediate containers until in some container the quality is established sufficient for removal off the process.