Parâmetro Global De Correlação Entre R E Embutibilidade

Santos, Igor Cuzzuol dos; Asakawa, Guilherme Nagatoshi; Brandão, Luiz Paulo Mendonça

doi:10.4322/2176-1523.0983

Cited by 1 publication

(2 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Current efficiency and power consumption were modelled by the following quadratic polynomials, obtained by the multiple regression Power Consumption = 5.63 + 0.144A + 0.00222B − 0.00863C −0.00816D − 0.0151E [18] Where, A is the anode type (see Table I), B is the current density (A/m 2 ), C is the acid concentration (g/L), D is the Temperature ( • C) and E is the zinc concentration (g/L). Correlation coefficients for these equations were 0.940 and 0.953, respectively, which demonstrate a good fitting for both current efficiency and power consumption.…”

Section: Resultsmentioning

confidence: 99%

“…15,16 Generally, decreasing the power consumption was the main target; Therefore, some studies have been performed to fulfill this aim. [17][18][19][20] It is well-known that any insoluble anode material used for zinc electrowinning from sulfate solutions should possess at least three characteristics; high electrical conductivity, good electro-catalytically capabilities for oxygen evolution, and good stability (corrosion resistance). Moreover, the anodes should have a high mechanical strength, particularly useful against bending (warping) and creep during long z E-mail: rashchi@ut.ac.ir time service.…”

mentioning

confidence: 99%

See 1 more Smart Citation

The Influence of Anode Composition on Energy Consumption and Current Efficiency in Zinc Electrowinning

Dashti

Rashchi

Emamy

et al. 2017

J. Electrochem. Soc.

View full text Add to dashboard Cite

The basic method for the electrolytic zinc production is an electrowinning process based on sulfate solutions. The major problems for this industry are low current efficiency and high energy consumption leading to deterioration in the quality of cathodic zinc. The most applied approach for overcoming the mentioned problems is altering the zinc electrowinning conditions. Using Taguchi orthogonal (L 25 ) array, five parameters (anode type, current density, sulfuric acid concentration, electrolyte temperature, and zinc concentration in electrolyte) at five different levels were selected to design and minimize the number of experiments. The experimental conditions were, zinc concentration of 50-80 g/L, acid concentration of 150-180 g/L, current density 500-1000 A/m 2 and five different anodes at 30-60 • C. Cast anodes of varying compositions that analyzed were Pb-Ag 0.5%, Pb-Ag 2%, Pb-Ag 0.5%-Sn 2%-Ca 1%, Pb-Ag 0.5%-Sn 2%-Bi 1%, and Pb-Ag 0.5%-Sn 2%-Sb 1%. The optimum conditions for the electrowinning process were anode composition: Pb-Ag 0.5%-Sn 2%-Sb 1%, current density: 500 A/m 2 , acid concentration: 165 g/L, electrolyte temperature: 50 • C and Zn concentration: 80 g/L. Analysis of variance (ANOVA) showed that current density was the most important parameter. A smooth and compact structure in zinc deposits was obtained by using anode Pb-Ag 0.5%-Sn 2%-Sb 1%.

show abstract

Section: Resultsmentioning

confidence: 99%

mentioning

confidence: 99%