Patent ID: 8215823

Claim:
A powder mixing method for mixing powder for use in high volume mixing applications comprising: introducing recirculated wetted powder mixture into a mixing chamber of a powder mixer via recirculation jets provided annularly within the mixer so that flow of recirculated wetted powder mixture from the recirculation jets enters the mixing chamber at a converging angle, introducing mix water into said mixing chamber downstream of said recirculation jets via adjustable water jets with metering orifices that are provided annularly within the mixer and are directed inwardly in a non-axial and unobstructed orientation so that mix water discharging from the metering orifices enters the mixing chamber at a converging angle and intersects with the flow of recirculated wetted powder mixture from the recirculation jets without impinging on any structure, and introducing dry bulk powder centrally into said mixing chamber upstream of said recirculation outlets via a straight bulk powder inlet provided in said mixing chamber so that the mix water and recirculated wetted powder mixture intersect with and thoroughly wet and mix with the dry bulk powder within the mixing chamber to form a wetted powder mixture that flows out of the mixing chamber.