For its techno-economic evaluation is proposed the circuit apparatus, comprising: a ball mill operating in a closed circuit with a multifrequency screener; stage of dewatering of crushed product comprising a hydrocyclone and multifrequency screener, stage of the thickening of hydrocyclone overflow and dewatering screeners undersize product in the sump with the return sludge for dewatering and roar and clarified water - in the grinding circuit.
The initial size of phosphate rock fed to the cycle of wet milling is about 10-0 mm or an average of 3% larger than the class of 4 mm (range size can be + / - 20%).
Required end fineness of grinding: no more than 5% passing 150 microns or 100 #.
To achieve the required size grinding is proposed to use a ball mill operating in closed circuit with multifrequency modular crash, equipped with spray systems oversize product water.
Dewatering crushed rock is also recommended to use multi-frequency rumble.
As the solids content in the final screen undersize product that works in a cycle of crushing, will be approximately equal (30-35)%, then, prior to thickening undersize product before dehydrating crash, it is recommended to install a hydrocyclone, concentrated product which is delivered to a roar.
Predicted final moisture oversize product dewatering screen will be about (15-20)%. Draining the cyclone and dewatering screen Undersize be sent to the sump. To obtain the clarified water back advisable to file a settler flocculant and sludge dewatering to return to power noise.
Reverse water can be used to dilute products, directed to the closed-loop grinding.
Dr. Grigory Kosoy, Kroosh Technologies ltd