Question $3(20$ Points$).$ In a covellite flotation plant, $650t$ of ore containing $8\%Cu$ is enriched per day. In the rougher flotation circuit made in the first stage, rougher concentrate with $25\%Cu$ content is obtained. From this concentrate, $170t$ of final concentrate with $55\%Cu$ content is obtained with $83\%$ recovery. The cleaner circuit tailing is returned to the rougher flotation circuit. If the volumes of cells are $2,5m3$ for rougher circuit and $2m^3$ for cleaner circuit, how many cells should be used in the plant?

Rougher circuit: PKO$=\%30$;$t=10$min. $d=2,5g\frac{r}{c}{m}^3$

Cleaner circuit: PKO$=\%15$;$t=5$min.;$d_2=3,8g\frac{r}{c}{m}^3$

$(T=$ Last digit of your student number. If your student number is zero, take $T=5$ minutes$)$

$******$ Use a single digit after the comma in all calculations.