Optimum conditions of scheelite flotation Parameters Optimum conditions Roughing Cleaning Re-cleaning Feed size ~ 80%-200 # ~ 99%-200 # ~99%-200# Pulp density 30 % solids 20% solids 20% solids Agitation speed 1100 rpm 900 rpm 900 rpm (Aeration) Pulp pH ~10 ~10 ~10 Collector 600 g/t 500 g/t Nil (
Sodium oleate) Frother (Polypro- 50 g/t 50 g/t Nil pylene glycol) Depressant 1200 g/t 400 g/t Nil (Sodium silicate) Depressant Nil 20 g/t Nil (Quebracho) Conditioning time 6 min 6 min 6 min Flotation time 20 min 20 min 20 min Table 4.
Sodium oleate is a salt of unsaturated carboxyl acid.
The viscosity of sodium oleate melt is lower by several orders of magnitude than that of initial polymer melts.
Treating experimental viscosity data of PP/CPA mixture melts with the content of sodium oleate 0; 0.5; 3; 7 wt% in the above-mentioned reduced coordinates has shown an absence of invariance from the salt content [ILLUSTRATION FOR FIGURE 4 OMITTED].
Tsebrenko (2) has shown that "B" can serve as an indirect characteristic of the specific fiber formation: the thinner the microfibers and the larger their number, the higher is "B." The presence of other structure types suppresses "B." Data on the influence of sodium oleate on PP/CPA mixture melt elasticity for various temperatures are presented in Table 3.