The effect of leaching time and concentration of sulfuric acid on increasing nickel and cobalt content from ferronickel slag waste after alkaline fusion using sodium carbonate

2020 ◽  
Author(s):  
Arryan Jibril R. ◽  
Prinanda Doni Santoso ◽  
Agus Budi Prasetyo ◽  
Ahmad Maksum ◽  
Reza Miftahul Ulum ◽  
...  
Keyword(s):  
Sulfuric Acid ◽  
Sodium Carbonate ◽  
Cobalt Content ◽  
Alkaline Fusion ◽  
Ferronickel Slag ◽  
Slag Waste

Kinetics of sulfuric acid breakdown of beryl raw material activated by fusion with sodium carbonate

2015 ◽  
Vol 88 (9) ◽  
pp. 1555-1558
Author(s):  
V. I. Samoilov ◽  
G. S. Bekimbaeva ◽  
Zh. S. Onalbayeva ◽  
N. A. Kulenova
Keyword(s):  
Sulfuric Acid ◽  
Sodium Carbonate ◽  
Raw Material ◽  
Kinetics Of

Effect of sodium carbonate (Na2CO3) additives and palm kernel shell charcoal to increase nickel and iron content from ferronickel slag using the pyrometallurgical method

2020 ◽  
Author(s):  
Muhammad Darryl Alfariz ◽  
Wahyu Mayangsari ◽  
Agus Budi Prasetyo ◽  
Ahmad Maksum ◽  
Totok Prasetyo ◽  
...  
Keyword(s):  
Sodium Carbonate ◽  
Iron Content ◽  
Palm Kernel ◽  
Palm Kernel Shell ◽  
Ferronickel Slag

Standardization of Sulfuric Acid against Sodium Carbonate

1955 ◽  
Vol 27 (7) ◽  
pp. 1173-1173 ◽  
Author(s):  
E. W. Balis ◽  
L. B. Bronk ◽  
H. A. Liebhafsky ◽  
H. G. Pfeiffer
Keyword(s):  
Sulfuric Acid ◽  
Sodium Carbonate

Polarization Behavior of Iron-Cobalt Alloys in Sulfuric Acid Solutions

CORROSION ◽  
1968 ◽  
Vol 24 (7) ◽  
pp. 197-205 ◽  
Author(s):  
M. M. MOTTERN ◽  
J. R. MYERS
Keyword(s):  
Sulfuric Acid ◽  
Oxygen Evolution ◽  
Current Density ◽  
Cathodic Polarization ◽  
Cobalt Content ◽  
Cobalt Alloys ◽  
Acid Solutions ◽  
Iron Cobalt ◽  
Iron Cobalt Alloys ◽  
Sulfuric Acid Solutions

Abstract Anodic polarization behavior of iron, cobalt and seven iron-cobalt alloys in H2-saturated 1, 5 and 10 N sulfuric acid solutions was investigated at 22 C using a potentiostatic technique. Cobalt and the 95 w/o cobalt alloy did not passivate in any acid studied. In 10 N acid, specimens containing 60 w/o or more cobalt failed to exhibit a normal active-to-passive transition. Specimens containing 75 and 80 w/o cobalt were passivated only marginally in 5 N acid. Specimens which did not have a normal passive region exhibited “secondary” passivation at potentials just prior to visible oxygen evolution. Tafel slopes for anodic dissolution and oxygen evolution varied from 0.040 to 0.065 and 0.065 to 0.095 volt, respectively and appeared to be composition and pH independent. Corrosion potentials were linear functions of pH over the pH range +1.87 to −1.08; dEcorr/dpH varied from −0.035 to −0.045, independent of composition. Ecorr decreased linearly with composition from a value of −0.360 volt vs SCE for pure cobalt to −0.505 volt for pure iron. Critical current density increased slightly with increasing cobalt content and obeyed the expression: logicr = logicro + kpH. The passive current density increased with both increasing cobalt content and increasing acid concentration. Values of io, H2, icorr and βc” for iron and cobalt in H2-saturated, 1, 5 and 10 N acid were determined from cathodic polarization curves. Hydrogen overvoltage at 1 ma/cm2 for iron and cobalt appeared to increase linearly with pH; dη/dpH ≅ −0.045. Effect of time on the cathodic polarization parameters for iron in H2-saturated 1 N acid was determined.

scholarly journals An Experimental Study of Possible Post-War Ferronickel Slag Waste Disposal in Szklary (Lower Silesian, Poland) as Partial Aggregate Substitute in Concrete: Characterization of Physical, Mechanical, and Thermal Properties

Materials ◽  
2021 ◽  
Vol 14 (10) ◽  
pp. 2552
Author(s):  
Marcin Małek ◽  
Mateusz Jackowski ◽  
Waldemar Łasica ◽  
Kamil Dydek ◽  
Anna Boczkowska
Keyword(s):  
Thermal Properties ◽  
Production Process ◽  
Mechanical And Thermal Properties ◽  
Natural Aggregate ◽  
Concrete Production ◽  
Ferronickel Slag ◽  
Natural Aggregates ◽  
Post War ◽  
Concrete Characterization ◽  
Slag Waste

Aggregates derived from waste, due to the growing awareness of global warming, are more and more often used in the concrete production process. This way, their disposal not only reduces the pollution of the Earth but also lowers the consumption of natural aggregates, which are limited. One of the new “eco” aggregates may be a ferronickel slag waste (FNSW), which was generated in post-war metallurgical processes and stored in Szklary (Lower Silesian, Poland). In order to determine the possibility of using ferronickel slag waste aggregate (FNSWA) in the concrete production process, new concrete mixtures were designed and tested. Physical properties (cone slump, air content, pH, and density), mechanical properties (compressive strength, flexural strength, and tensile strength), and thermal properties (thermal conductivity) were assessed for all new laboratory recipes. Moreover, the modulus of elasticity and Poisson’s ratio were determined. This study includes five different contents of FNSWA in the amount of 5%, 10%, 15%, 20%, and 25% of the mass of natural aggregate as its partial substitute. The final results were compared to the base sample (BS) containing 100% natural aggregate, which was granite.

A New Approach To the Comprehensive Treatment of Waste Slag, Waste Gas and Wastewater At Sulfuric Acid Plants in China

1995 ◽  
Vol 13 (1) ◽  
pp. 13-19
Author(s):  
Pei-Shi Sun ◽  
Shao-Xian He ◽  
Ning Ping ◽  
Xiao-Ming Wu ◽  
Li-Li Liu
Keyword(s):  
Sulfuric Acid ◽  
Comprehensive Treatment ◽  
New Approach ◽  
Waste Gas ◽  
Slag Waste

Process Investigation for Purifying Hydrated Silica from Fly Ash by Acid and Alkali Combination Method

2010 ◽  
Vol 97-101 ◽  
pp. 1170-1173
Author(s):  
Feng Li ◽  
Xiang Dong Liu ◽  
Yuan He Guo
Keyword(s):  
Sulfuric Acid ◽  
Fly Ash ◽  
Sodium Carbonate ◽  
Combination Method ◽  
Hydrated Silica ◽  
Dissolution Rates

In this paper, with sodium carbonate as an auxiliary agent in the fly ash, the mixtures were sintered at 880°C for 90 min, then dissolved by different concentrations of sulfuric acid respectively for extracting the hydrated silica. The results show that when the activated ash fly is dissolved by different concentrations of sulfuric acid, the dissolution rates of ash fly increase with the concentration of sulfuric acid increasing. Impurities of aluminum and iron atoms are present in an orderly array of micro-andalusite structure in the generative hydrated silica. When they are dissolved by sulfuric acid for 2%(wt%), the orderly structure is destroyed obviously, and the aluminum and iron atoms are separated out. The purity of hydrated silica can reach 99.9%.

Kinetics of sulfuric acid breakdown of beryllium raw material activated by fusion with sodium carbonate

2016 ◽  
Vol 89 (2) ◽  
pp. 185-188
Author(s):  
V. I. Samoilov ◽  
G. S. Bekimbaeva ◽  
Zh. S. Onalbaeva ◽  
N. A. Kulenova
Keyword(s):  
Sulfuric Acid ◽  
Sodium Carbonate ◽  
Raw Material ◽  
Kinetics Of
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