DEVICE FOR AUTOMATIC PARTICLE SIZE CONTROL IN PULP FLOW Russian patent published in 2018 - IPC G01N15/02 

FIELD: control systems.

SUBSTANCE: invention relates to devices for automatically controlling the particle size in the pulp flow during the grinding of the material and can be used in the field of ore mineral processing, as well as in the mining and metallurgy, construction and other areas of industry. Device for automatic control of the particle size in the pulp flow contains sensor element 4, made in the form of micrometric probe 7, thrust bearing 13 of micrometer probe 7, the displacement value sensor and micrometric probe 7 drive. Apparatus further comprises a control controller, a pneumatic distributor, storage tank 1, switching valves, measuring cell 6, transfer pump 17, drive of micrometric probe 7 is made in the form of a rodless tape cylinder, the displacement sensor of micrometric probe 7 is made in the form of microprocessor-based contact sensor 14, output of which is connected to the input of signal amplifier 16, storage container 1 contains level 2 and 3 sensors and pulp density. Measuring cell 1 is made in the form of a flow tank, inside which is thrust bearing 13 of micrometer probe 7, and thrust bearing 15 of the microprocessor-based contact sensing sensor 14 is fixed on the outer surface, and the suction branch pipe of transfer pump 17 is connected to intake manifold 18, 1^st input of which is connected to the valve at the outlet of the storage tank, the 2^nd collector input is connected to the outlet of the sampling pipeline valve from the process vessel, and the discharge branch pipe of transfer pump 17 is connected to outlet manifold 18 whose 1^st output is connected to pulp discharge valve 25 into the drain from storage tank 1, 2^nd output is connected to sample supply valve 26 to the 1^st input of the storage container, the 3^rd output is connected to sample supply valve 27 in measuring cell 6, 2^nd input of storage container 1 is connected to the output of measuring cell 6, and the 3^rd input of storage container 1 is connected to the outlet of water supply valve 29. Control outputs of pneumatic distributor 30 are connected to the corresponding inputs of rodless belt cylinder 31, measurement inputs of controller 37 are connected to the outputs of the level sensors, the pulp density in the storage tank and the signal amplifier of the microprocessor-based contact sensor, and the outputs of controller 37 are connected to the control inputs of the switching valves, the air distributor and transfer pump 17.

EFFECT: increasing the reliability and accuracy of measurements of the granulometric composition of the material in the pulp flow by eliminating the influence of foreign materials on the results of measurements of pulp contamination and the use of a fundamentally new mechanism – a pneumatic drive.

6 cl, 2 dwg