The invention relates to a realizing method and device of a
coal slime semi-concentrate flotation process. The realizing method comprises the steps that
coal slime in a
coal preparation
plant is divided into three parts to enter a concentrate
machine, a
slurry mixing
barrel and a
slurry mixing tank correspondingly; high-concentration ore
slurry and low-concentration ore slurry are subjected to coarse mixing firstly and then subjected to fine mixing to be ore slurry with the concentration being 90-120 g / L; and the prepared ore slurry automatically flows into an ore slurry
preprocessor to be pre-mineralized and then enters a flotation
machine to be floated. The realizing device comprises the concentrate
machine, an underflow pump, the slurry mixing
barrel, electric adjusting valves, static pressure sensors, a trans-permutation pump, the slurry
mixing tank, manual adjusting valves, a concentration meter, a flowmeter, the ore slurry
preprocessor, the floatation machine and an intelligent controller
processing and controlling a feedback
signal, wherein the electric adjusting valves, the static pressure sensors and the concentration meter are connected with the intelligent controller through a wired mode. Precise, flexible and adjustable matching of the ore slurry with the high-concentration being 350-450 g / L and the ore slurry with the low-concentration being not more than 60 g / L is achieved, and it is guaranteed that the concentration of the floating ore slurry entering the ore slurry
preprocessor is within the concentration range of 90 g / L-120 g / L all the time, and the concentration is relatively stable.