The total solid feed to the primary crusher is $1200$ t$/$hr$.$ In analysing the performance

of this circuit, consider two size fractions, namely the particles larger than $1$cm and

those passing $1$cm$.$ In the feed to the primary crusher only $15\%$ of the material is

already finer than $1$cm$.$ Assume that the jaw crusher will break $30\%$ of the material

coarser than $1$cm to finer than this size, while the cone crusher will break $50\%$ of

the material above $1$cm to finer than this size. Assume that the screen$$s

performance is such that the partition number for the coarser particles is $0\mathrm{.}8,$ while

it is $0\mathrm{.}3$ for the finer particles.

c$)$ Carry out a mass balance over the circuit calculating the mass flowrates of each

of the components in each of the streams. What is the percentage passing

$1$cm in the crusher circuit product$/$mill circuit feed?