scholarly journals DETERMINATION OF THE OPTIMAL TEMPERATURE RANGE FOR PRE-FIRING KAOLIN

2020 ◽  
pp. 85-87
Author(s):  
TATIANA YURIEVNA ERANSKAYA ◽  
Keyword(s):  
Nitric Acid ◽  
Aluminum Hydroxide ◽  
Acid Leaching ◽  
Optimal Temperature ◽  
Temperature Range ◽  
Nitric Acid Leaching ◽  
Optimal Temperature Range ◽  
Maximum Opening

The effect of pre-firing of kaolin concentrates on the yield of aluminum hydroxide during nitric acid leaching by cavitation method is studied. The firing interval of 700-750 ° C is optimal for maximum opening of kaolin concentrate.

scholarly journals Nitric acid leaching of polymetallic middlings of concentration

2013 ◽  
Vol 54 (6) ◽  
pp. 440-442 ◽  
Author(s):  
D. A. Rogozhnikov ◽  
S. V. Mamyachenkov ◽  
S. V. Karelov ◽  
O. S. Anisimova
Keyword(s):  
Nitric Acid ◽  
Acid Leaching ◽  
Nitric Acid Leaching

scholarly journals Research of Polymetallic Sulfide Industrial Waste Nitric Acid Treatment

2017 ◽  
Vol 2 (2) ◽  
pp. 174
Author(s):  
Rogozhnikov D.A. ◽  
Dizer O.A. ◽  
Shoppert A.A.
Keyword(s):  
Nitric Acid ◽  
Industrial Waste ◽  
Mutual Influence ◽  
Acid Leaching ◽  
Raw Material ◽  
X Ray Diffraction ◽  
Mathematical Methods ◽  
X Ray ◽  
Nitric Acid Leaching ◽  
Kinetic Features

<p>Thermodynamic and kinetic features studies of polymetallic sulfide industrial waste nitric acid leaching were carried out. Elemental and phase composition of investigated raw material were studied with X-ray diffraction and electron microscopy methods. Calculations of the Gibbs energy change for the likely reactions of sulfide minerals with nitric acid were performed. In order to determine the most probable conditions of the sulfide industrial waste leaching in nitric acid, as well as the mutual influence of the produced pulp components on the performance of the process, the kinetics evaluation of multicomponent sulfide industrial waste in a nitric medium was studied using mathematical methods.</p>

Effects of temperature on growth of north-east Pacific moon jellyfish ephyrae, Aurelia labiata (Cnidaria: Scyphozoa)

2005 ◽  
Vol 85 (3) ◽  
pp. 569-573 ◽  
Author(s):  
Chad L. Widmer
Keyword(s):  
Good Condition ◽  
Bell Diameter ◽  
Optimal Temperature ◽  
Moon Jellyfish ◽  
Poor Condition ◽  
Temperature Range ◽  
North East ◽  
East Pacific ◽  
Optimal Temperature Range ◽  
Effects Of Temperature

The effects of ten different water temperatures on the growth of newly released ephyrae of Aurelia labiata were explored. Ephyrae grown at 21°C showed the greatest growth, increasing in bell diameter from about 4.0 mm to 14.5 mm in 14 days and remained in good condition for the duration of the experiment. Ephyrae subjected to other temperatures grew at different rates. Ephyrae maintained at 8°C gradually decreased in size during the experiment, shrinking in bell diameter from about 4.0 mm to 3.8 mm by day 14, but remained in apparent good condition. Ephyrae reared at 22.5°C and above everted their bells, were in poor condition, and were unable to feed or swim effectively by about day ten. In this study the optimal temperature range for rearing A. labiata ephyrae was 12°C—21°C, which corresponds with the reported range for this species.

Selective nitric acid leaching for recycling of lead-bearing solder dross

2020 ◽  
Vol 264 ◽  
pp. 121675
Author(s):  
Z.T. Ichlas ◽  
R.A. Rustandi ◽  
M.Z. Mubarok
Keyword(s):  
Nitric Acid ◽  
Acid Leaching ◽  
Nitric Acid Leaching

Selective Nitric Acid Leaching of Rare-Earth Elements from Calcium and Phosphate in Fluorapatite Concentrate

JOM ◽  
2019 ◽  
Vol 71 (12) ◽  
pp. 4578-4587 ◽  
Author(s):  
Seyed Ramin Banihashemi ◽  
Bijan Taheri ◽  
Seyed Mohammad Razavian ◽  
Faraz Soltani
Keyword(s):  
Rare Earth ◽  
Nitric Acid ◽  
Rare Earth Elements ◽  
Acid Leaching ◽  
Nitric Acid Leaching
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