Method for industrial producing of highly dispersed powders

A method for industrial production of high dispersed powders, comprising the steps of:

• mixing material to be pulverized with high pressure working gas into a gas-solids suspension,
• conveying of the gas-solids suspension through acceleration nozzles to a pulverizing chamber of a counterjet pulverizer for autogenic pulverizing,
• conveying the pulverized gas-solids suspension to an intermediate tank, said steps of mixing, conveying to a pulverizing chamber and conveying to an intermediate tank comprising a pulverizing cycle,
• removing the gas from the gas-solids suspension and collecting the solids in the intermediate tank,
• returning solids from the intermediate tank to be pulverized together with new raw material till there is a desired circulation load, and
• continuing the process so that as much end product material is removed from the process as raw material is added to the process, and
• wherein said mixing step includes the step of
• feeding the material alternately into side by side double-valve feeders and balancing tanks, where a feed pressure in each double-valve feeder is higher than a regular feed pressure in an associated balancing tank, and
• synchronizing the double-valve feeders so that an after-pressure left in one double valve feeder after release of the material into the associated balancing tank is utilized as initial pressure in the other double-valve feeder after receipt of material therein.