DRY DOLOMITE PROCESSING LINE Russian patent published in 2017 - IPC B07B9/00 

FIELD: chemistry.

SUBSTANCE: dry dolomite processing line contains a receiving lump dolomite hopper equipped with a plate unloader, an intermediate belt conveyor for feeding lump dolomite into a drying drum equipped with a group of cyclones, a bag filter and a smoke pump for removing flue gases and trapping a fine-dispersed dolomite fraction, a transport chain feeding the captured fine-dispersed fraction into the storage hopper, consisting of a belt conveyor, a screw conveyor and the first bucket elevator, a local aspiration system connected to the storage hopper and transport-technological equipment, an impact crusher installed at the output of the drying drum, and the second bucket elevator. The input of the latter is connected to the output of the impact crusher, and the output is connected to the input of a two-sieve vibrating screen. The oversize output of the upper mesh of the two-sieve vibrating screen is connected to the input of the impact crusher. The oversize output of its lower mesh is connected to the input of the single-sieve vibrating screen, from the undersize output of which the sieved dolomite is poured onto the first input of the assembly conveyor feeding the sieved dolomite through the magnetic separator, the third bucket elevator and the first flow switch into one of the two silo jars. The line is further provided with the second flow switch, the input of which is connected to the undersize output of the two-sieve vibrating screen, and the first output is connected to the second input of the assembly conveyor, an intermediate hopper connected by its input to the second output of the second flow switch, a screw discharge feeder, the input of which is connected to the output of the intermediate hopper, the fourth bucket elevator connected by its input with the output of the screw discharge feeder, an adjustable aeroclassifier, the input of which is connected to the output of the fourth bucket elevator, as well as the third flow switch and the roller crusher. From the first output of the adjustable aeroclassifier, the isolated coarse dispersion fraction of the sieved dolomite is discharged to the third input of the assembly conveyor. From the second output, the isolated fine-dispersed fraction of the sieved dolomite is fed to the input of the screw conveyor. The under-crushed fraction of the sieved dolomite from the oversize output of the single-sieve vibrating screen enters the input of the third flow switch, the first output of which is connected to the input of the impact crusher, and the second output is connected to the roller crusher connected by its output to the input of the second bucket elevator.

EFFECT: increasing the efficiency of recovering the fine-dispersed fraction from crushed dolomite, used as a mineral powder.

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