5
CONCLUSIONS
Bench top laboratory testing and pilot plant testing
of Syensqo’s newly developed acid mist suppressant,
ACORGA ® EW98, has shown good performance in acid
mist suppression and SX/EW compatibility. Key takeaways
from the project include:
• Adequate acid mist suppression at a dosage of
10–20 ppm
• SX compatibility demonstrated for both metallurgi-
cal and physical aspects
• ACORGA ® EW98 demonstrated similar perfor-
mance in an integrated SX/EW pilot plant to the
results shown in bench scale testing.
ACORGA ® EW98 is free from fluorocarbons and
employs non-toxic components to address acid mist sup-
pression requirements. The additive forms a stable, thin film
on the electrolyte surface significantly reducing the release
of acid mist during the electrowinning process. By mini-
mizing acid mist, ACORGA ® EW98 provides improve-
ments to air quality in the workplace thereby enhancing
worker safety.
ACORGA ® EW98 is compatible with both copper
solvent extraction and electrowinning systems. With high
aqueous solubility, the additive does not transfer or inter-
fere with the SX organic. In electrowinning, ACORGA ®
EW98 ensures consistent copper deposition rates, and
maintains high quality copper production without com-
promising efficiency. ACORGA ® EW98 is able to achieve
this at low treatment dosages and presents a cost effective
solution to address acid mist suppression.
Further demonstration and industrial scale evaluations
are pending to evaluate the performance at larger scale.
REFERENCES
[1] Justin James McGinnity &Michael J. Nicol (2014)
Sulfuric Acid Mist:Generation, Suppression, Health
Aspects, and Analysis, Mineral Processing and
Extractive Metallurgy Review, 35:3, 149–192, DOI:
10.1080/08827508.2012.723650.
[2] Sigley, J. L., Johnson, P. C., &Beaudoin, S. P.
(2003). Use of nonionic surfactant to reduce sulfu-
ric acid mist in the copper electrowinning process.
Hydrometallurgy, 70(1–8). https://doi.org/10.1016
/S0304-386X(03)00077-X.
[3] Alfantazi, A. M., Kalanchey, R. M., &Dreisinger,
D. B. (2004). The use of organic additives to sup-
press acid mist in copper electrowinning. Canadian
Metallurgical Quarterly, 43(4), 449–460. Canadian
Institute of Mining, Metallurgy and Petroleum.
Figure 9. ACORGA® EW98 pilot plant net transfer
Figure 10. ACORGA® EW98 pilot plant extract and strip
phase disengagement times
CONCLUSIONS
Bench top laboratory testing and pilot plant testing
of Syensqo’s newly developed acid mist suppressant,
ACORGA ® EW98, has shown good performance in acid
mist suppression and SX/EW compatibility. Key takeaways
from the project include:
• Adequate acid mist suppression at a dosage of
10–20 ppm
• SX compatibility demonstrated for both metallurgi-
cal and physical aspects
• ACORGA ® EW98 demonstrated similar perfor-
mance in an integrated SX/EW pilot plant to the
results shown in bench scale testing.
ACORGA ® EW98 is free from fluorocarbons and
employs non-toxic components to address acid mist sup-
pression requirements. The additive forms a stable, thin film
on the electrolyte surface significantly reducing the release
of acid mist during the electrowinning process. By mini-
mizing acid mist, ACORGA ® EW98 provides improve-
ments to air quality in the workplace thereby enhancing
worker safety.
ACORGA ® EW98 is compatible with both copper
solvent extraction and electrowinning systems. With high
aqueous solubility, the additive does not transfer or inter-
fere with the SX organic. In electrowinning, ACORGA ®
EW98 ensures consistent copper deposition rates, and
maintains high quality copper production without com-
promising efficiency. ACORGA ® EW98 is able to achieve
this at low treatment dosages and presents a cost effective
solution to address acid mist suppression.
Further demonstration and industrial scale evaluations
are pending to evaluate the performance at larger scale.
REFERENCES
[1] Justin James McGinnity &Michael J. Nicol (2014)
Sulfuric Acid Mist:Generation, Suppression, Health
Aspects, and Analysis, Mineral Processing and
Extractive Metallurgy Review, 35:3, 149–192, DOI:
10.1080/08827508.2012.723650.
[2] Sigley, J. L., Johnson, P. C., &Beaudoin, S. P.
(2003). Use of nonionic surfactant to reduce sulfu-
ric acid mist in the copper electrowinning process.
Hydrometallurgy, 70(1–8). https://doi.org/10.1016
/S0304-386X(03)00077-X.
[3] Alfantazi, A. M., Kalanchey, R. M., &Dreisinger,
D. B. (2004). The use of organic additives to sup-
press acid mist in copper electrowinning. Canadian
Metallurgical Quarterly, 43(4), 449–460. Canadian
Institute of Mining, Metallurgy and Petroleum.
Figure 9. ACORGA® EW98 pilot plant net transfer
Figure 10. ACORGA® EW98 pilot plant extract and strip
phase disengagement times