COMMINUTION EXAMPLE 5304 – COMMINUTION

FLOWSHEET DATA NO OPR UNIT PROCESS IS1 IS2 IS3 IS4 IS5 IS6 INV OS1 OS2 OS3 OS4 OS5 OS6 1 SEC COMMINUTION 0 0 0 0 0 0 0 0 0 0 0 0 0 2 SCR GRIZZLY 1 0 0 0 0 0 0 2 3 0 0 0 0 3 CRJ JAW 3 0 0 0 0 0 0 4 0 0 0 0 0 4 CVB CONVEYOR 2 4 0 0 0 0 0 5 0 0 0 0 0 5 SCR DOUBLE DECK 5 0 0 0 0 0 0 6 7 8 0 0 0 6 CRC CONE 7 8 0 0 0 0 0 9 0 0 0 0 0 7 SCR DOUBLE DECK 6 9 13 0 0 0 0 10 11 12 0 0 0 8 CRC CONE 11 12 0 0 0 0 0 13 0 0 0 0 0 9 MLB BALL MILL 10 14 18 0 0 0 0 15 0 0 0 0 0 10 SMP 15 16 0 0 0 0 0 17 0 0 0 0 0 11 CYH CYCLONE 17 0 0 0 0 0 0 19 18 0 0 0 0

Cummulative Fraction Passing Data17.00 IN 1.012.00 IN 0.98 8.48 IN 0.85 6.00 IN 0.68 4.24 IN 0.48 3.00 IN 0.37 2.12 IN 0.26 1.50 IN 0.20 1.05 IN 0.14 0.742 IN 0.11 0.525 IN 0.08 0.371 IN 0.06 3 TY 0.042000 TY 0.00001

When prompted to select the Sieve Series to use select Tyler Sieves. Then when Selecting the Screen Sieve Series for Data Entry use the complete Tyler Sieve Series.Linear Interpolation will be used to generate any points not entered.

COMMINUTION EXAMPLEThe design of the circuit is to achieve a product of 110 microns. Process DataThe components required are SiO2 (Quartz) Solid and H2O aqueous. Stream 1 - The Feed flowrate is 400 mt/hr and contains 95% solids.

Stream 14 - Ball mill make-up water. Initially estimated as 10 mt/hr. This flowrate will be adjusted by a percent solids controller, PSC, on the ball mill unit operation, maintaining 68% solids.

Stream 16 - Cyclone make-up water. Initially estimated as 10 mt/hr. This flowrate will be adjusted by a percent solids controller to maintain 55% solids. Percent Solids ControlsCN ID OP SN PS1001 MLB 68% Solids 9 14 0.681002 CYH 55% Solids 11 16 0.55

User Created Objects Scaler Name ID ValueUSMLBRATIO MLB L-WR 1.275

Then click the Ball Mill unit operation with the Edit Object Data Tool & in the Controls CtA field enter

USMLBRATIOIL÷ID�

IL is the Ball Mill Length Inside Liners ID is the Ball Mill Diameter Inside Liners Unit Operation DataAll of the Input Data for the Unit Operations can be found on the diagram.  Stream Graphic BoxesNow add the following Stream Graphic Boxes, remembering there is already an EXAMPLE in the List window of the Stream Graphics Boxes and this is Box number 1.