School of Engineering

Module Code: ENCH$2$MB

Module Title: Mass and Energy Balances

UNIVERSITY OF

KWAZULU$-$NATAL

Tutorial $6$ Mineral Processing

QUESTION $1$

A fine ore processing plant treats $700$ tonnes of solids per hour. The feed pulp contains $35\%$

solids by weight.

$($a$)$ Calculate the dilution ratio.

$($b$)$ Find the water required in $m^3$ per hour.

QUESTION $2$

A flotation plant treats $500t$ of solids per hour. The feed pulp, containing $40\%$ solids by

weight, is conditioned for $5$min with reagents being pumped to flotation. Calculate the

volume of conditioning tank required. $($Density of solids is $2700k\frac{g}{m^3})$

QUESTION $3$

In the circuit shown below, the dry solids of density $300k\frac{g}{m^3}$ are fed at the rate of $25$ton$\frac{s}{h}r.$

the feed to the cyclone contains $36\%$ solids by weight. It is found that $250m$ size in the road

mill discharge, ball mill discharge and cyclone feed is $27\%,5\%,$ and $14\%$ respectively.

Determine the volumetric flow rate of the feed $($solid $+$ water$)$ to the cyclone.