Abstract: Apparatus for pneumatically metering flowable solids products to a conveying air stream without using mechanical metering devices. The apparatus includes an eductor receiving product from a hopper and connected to an air supply that is automatically adjustable in response to the weight of the product to produce a selected product flow rate.

Abstract: Apparatus and process for producing a clay slurry from raw clay in a substantially dust-free manner including a water-driven vacuum eductor for metering the removal of clay from a super bag container and mixing the clay with a carrier water that also serves as the motive force for the eductor for producing a clay slurry and feeding it to an equalization tank that de-aerates and equalizes the slurry. A bag shaker is provided in the source of clay to assist feeding where needed, and a vacuum breaking valve is provided for the eductor to control the flow of raw clay into the eductor. The bag of clay is suspended from a load cell that continuously delivers a weight signal to a programmable logic controller adjustable to set the rate of clay being fed to the eductor and to activate the bag shaker if the clay flow rate lags the set rate and the vacuum breaker if the clay flow rate exceeds the set rate.