Process for injecting, by pneumatic means, metered quantities of pulverulent material into a chamber which is under variable pressure

Abstract From the Canadian patent

The process consists of forming in a single metering device, a pneumatic mixture comprising a relatively high content of pulverulent material in a propellent gas in propelling this mixture through a common primary conduit as far as a distribution head in which the mixture is divided into secondary currents which are each sent through secondary conduits to one of the injection points and in regulating, the flowrate of the pneumatic current in each of the secondary conduits.