A New Innovative Method of Flotation Separation for High Sulfur …
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Fig. 1 Closed circuit flotation flowsheet for old and new schemes
Results and Discussion
Galena–Pyrite Bulk Flotation
The particle size has a significant effect on the flotation behaviors of minerals; therefore, the effect of grinding fineness (−0.074 mm) on galena-pyrite bulk flotation was
firstly investigated and the results are shown in Fig. 2a. As can be noted that the
recovery of lead, zinc, and sulfur was increased simultaneously as the proportion of
−0.074 mm particles increased from 70 to 85%. However, their flotation behaviors
enhanced slightly at much particles finer than −0.074 mm. Thus, the optimum grinding condition was determined as 85% particles finer than −0.074 mm. Figure 2b–d
shows the flotation performance of galena, sphalerite, and pyrite under the different
collector systems. It is clear from the results that good flotation behavior was not
achieved by adopting individual collector. Contrary, the highest recovery of lead
(93.5%), sulfur (87%), and relatively low recovery of zinc (22%) could be realized
by using the combined collectors BX and DDTC at BX to DDTC ratio of 1:1. When
collector dosage increased to 100 g/t from 60 g/t, the recoveries of lead, zinc and
sulfur were raised obviously from 82, 15, and 72 to 93, 21, and 77% respectively.
and then remained almost unchanged, while their grades began to fall gradually. Zinc
sulfate and sodium carbonate acted as zinc depressant; their depression effects are
depicted in Fig. 2e, f. After the conditional tests, the optimum reagent conditions for
galena–pyrite bulk flotation were determined as follows: combined collector (BX:
DDTC=1:1) 100 g/t, zinc sulfate and sodium carbonate dosage 600 and 1000 g/t,
respectively. Above results indicated that galena and pyrite have good flotation performance without adding lime. In galena–pyrite mixed flotation, the recoveries of
galena and pyrite are 93.5% and 87.5%, respectively. The phase analysis results are
close to the ideal recoveries (not shown). Besides, the recovery of sphalerite (not
627
Fig. 1 Closed circuit flotation flowsheet for old and new schemes
Results and Discussion
Galena–Pyrite Bulk Flotation
The particle size has a significant effect on the flotation behaviors of minerals; therefore, the effect of grinding fineness (−0.074 mm) on galena-pyrite bulk flotation was
firstly investigated and the results are shown in Fig. 2a. As can be noted that the
recovery of lead, zinc, and sulfur was increased simultaneously as the proportion of
−0.074 mm particles increased from 70 to 85%. However, their flotation behaviors
enhanced slightly at much particles finer than −0.074 mm. Thus, the optimum grinding condition was determined as 85% particles finer than −0.074 mm. Figure 2b–d
shows the flotation performance of galena, sphalerite, and pyrite under the different
collector systems. It is clear from the results that good flotation behavior was not
achieved by adopting individual collector. Contrary, the highest recovery of lead
(93.5%), sulfur (87%), and relatively low recovery of zinc (22%) could be realized
by using the combined collectors BX and DDTC at BX to DDTC ratio of 1:1. When
collector dosage increased to 100 g/t from 60 g/t, the recoveries of lead, zinc and
sulfur were raised obviously from 82, 15, and 72 to 93, 21, and 77% respectively.
and then remained almost unchanged, while their grades began to fall gradually. Zinc
sulfate and sodium carbonate acted as zinc depressant; their depression effects are
depicted in Fig. 2e, f. After the conditional tests, the optimum reagent conditions for
galena–pyrite bulk flotation were determined as follows: combined collector (BX:
DDTC=1:1) 100 g/t, zinc sulfate and sodium carbonate dosage 600 and 1000 g/t,
respectively. Above results indicated that galena and pyrite have good flotation performance without adding lime. In galena–pyrite mixed flotation, the recoveries of
galena and pyrite are 93.5% and 87.5%, respectively. The phase analysis results are
close to the ideal recoveries (not shown). Besides, the recovery of sphalerite (not