|
Process step |
% |
Products |
°C |
Running Time |
Remarks |
|
Pre-soak |
300 |
water |
28 |
|
|
|
|
0.1-0.2 |
Negahdar Ist-WB |
|
|
|
|
|
0.1 |
Rockol 642
|
|
run 30 mins |
|
|
|
|
|
|
rest 30 mins |
|
|
|
|
|
|
run 30 mins |
|
|
Drain |
|
|
|
|
|
|
Main soaking |
200 |
water |
28 |
|
|
|
|
0.3-0.5 |
soda ash |
|
|
|
|
|
0.2-0.3 |
Negahdar IST-WB |
|
|
|
|
|
0.2-0.3 |
Rockol 642 |
|
run 30 mins |
|
|
|
|
|
|
leave automatic |
|
|
|
|
|
|
rest 45 mins |
|
|
|
|
|
|
run 5 mins |
|
|
|
|
|
|
total time 10-12 hrs |
|
|
|
|
|
|
|
pH 9.2-9.5 |
|
|
|
|
|
|
Be < 3.5 |
|
Drain, pile |
|
|
|
|
|
|
Lime painting |
|
|
|
|
|
|
Preparation of lime paste
|
|
|
|
|
|
|
Add sodium hydosulphide |
|
|
|
|
Be 4-5 |
|
+sodium sulphide |
|
|
|
|
Be 18-19 |
|
+hydrated lime |
|
|
|
|
Be 24-26 |
|
+kaolin |
|
|
|
|
Be 32-34 |
|
+1 gr/L Rockol 642 |
|
|
|
|
|
|
After 4-5 hrs hairs removing will take place. Take the new
weight
|
|
|
|
|
|
|
Liming |
400 |
water |
28 |
|
|
|
|
1 |
sodium hydrosulphide |
|
|
|
|
|
1.5-2 |
sodium sulphide |
|
|
|
|
|
0.2 |
Rockol 642 |
|
run 30 mins |
|
|
|
3.5-4 |
hydrated lime |
|
rest 30 mins |
|
|
|
|
|
|
run 30 mins |
|
|
|
|
|
|
leave automatic |
|
|
|
|
|
|
run 5 mins |
|
|
|
|
|
|
rest 30 mins |
|
|
|
|
|
|
total time 24-36hrs |
|
|
|
|
|
|
|
pH 12.5 |
|
|
|
|
|
|
26-28°C |
|
Drain |
|
|
|
|
|
|
Washing |
|
|
|
|
|
|
200 |
|
|
|
|
|
|
water |
|
|
28 |
run 15 mins |
|
|
Drain-unload-fleshing-weight |
|
|
|
|
|
|
Reliming |
200 |
water |
25 |
|
|
|
|
0.2 |
Rockol 642 |
|
|
|
|
|
0.5-1 |
hydrated lime |
|
run 20 mins |
|
|
|
|
|
|
leave automatic |
|
|
|
|
|
|
run 2 mins |
|
|
|
|
|
|
rest 45 mins |
|
|
|
|
|
|