Concrete admixture production device and production method

The invention relates to the field of concrete raw material production, in particular to a concrete admixture production device and method. The stirrer comprises a stirring barrel and a stirring mechanism, the stirring barrel is of a rotary barrel-shaped structure, the top is provided with a rotating channel, the upper part is communicated with a feeding pipe, and the bottom is provided with a discharge valve; the stirring mechanism comprises stirring assemblies, a rotating cover, a fixed cover, a supporting frame, a driving mechanism used for driving the rotating cover to rotate at the rotating channel and an adjusting mechanism used for adjusting the distance between the stirring assemblies and the center shaft of the stirring barrel, the stirring assemblies are evenly arranged around the center shaft of the stirring barrel, and the rotating cover is of a rotary hollow structure; the adjusting mechanism is arranged on the rotating cover, the adjusting mechanism is in transmission connection with the driving