Optimisation of the chlorination of gold in decopperized anode slime in aqueous medium

Dönmez, Bünyamin; Ekinci, Zafer; Çelik, Cafer; Çolak, Sabri

doi:10.1016/s0304-386x(99)00009-2

Cited by 38 publications

(19 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…따 라서 전기분해를 수행하기 전에 용매추출(solvent extraction)을 이용하여 전기분해 효율을 감소시키는 불 순물들을 먼저 제거해야한다 (Yokoyama et al, 1996;Saji and Reddy, 2001). (Chen and Dutrizac, 1990;Donmez et al, 1999;Hait et al, 2004 NaOH를 첨가하기 전후, 용출-용액에 용해되어 있는 금 속성분에 대하여 화학분석 하였다( Table 2). 고체-잔류 물은 증류수로 반복-세척하여 자연건조 후 XRD 분석 을 수행하였다 (Fig.…”

Section: 김봉주·조강희·조지유·최낙철·박천영unclassified

“…이와 같이 Fe 함량변화가 매우 미약하게 그리고 회수율 이 매우 낮게 나타나는 원인은 (2)식과 같이 음극표면에 (Chen and Dutrizac, 1990;Chatterjee, 1996;Donmez et al, 1999;Amer, 2003 (Prengaman and Siegmund, 1999;Wang, 2008). 그러므로 음극에서 Cu가 많이 회수될수 록 양극부식이 그 만큼 많이 일어난다.…”

Section: 김봉주·조강희·조지유·최낙철·박천영unclassified

See 1 more Smart Citation

The Characteristic of Te Recovery in Gold Concentrate Using Electrolysis

Kim¹,

Cho²,

Jo³

et al. 2014

Economic and Environmental Geology

View full text Add to dashboard Cite

In order to obtain pure metallic Te from gold concentrate, roasting treatment, hypochlorite leaching, Fe removal and electrolysis experiments were carried out. The contents of Au, Ag and Te from the concentrate sample and roasted sample were much more soluble in the hypochlorite solution than in aqua regia digestion, whereas the metals Pb, Zn, Fe and Cu were easier to leach with the aqua regia than the hypochlorite. With the addition of NaOH in the hypochlorite leaching solution prior to electrolysis, the Fe removal rate achieved was only 96% in the concentrate sample, while it reached 98% in the roasted sample. The results of electrolysis for 240 min, 98% of the metallic copper was recovered from the concentrate sample, while 99% was obtained from the roasted sample due to the removal of S by roasting. The amount of anode slime was also greater in the electrolytic solution with the roasted sample than with the concentrate sample. The results on the anode slime after the magnetic separation process showed the amount of metallic pure native tellurium recovered was greater in the roasted sample than in the concentrate sample.

show abstract

Section: 김봉주·조강희·조지유·최낙철·박천영unclassified

The Characteristic of Te Recovery in Gold Concentrate Using Electrolysis

Kim¹,

Cho²,

Jo³

et al. 2014

Economic and Environmental Geology

View full text Add to dashboard Cite

show abstract

“…For example, Paulo (2001) simply uses an orthogonal array to conduct a full factorial design without using signal-to-noise ratio. Some other case studies (Donmez et al, 1999;Chen et al, 2000) using Taguchi method examine the response table and/or response graph, then pick up the winner without any statistical analysis. Some others (Huang and Tai, 2001;Ji and Loh, 2001) using Taguchi method not only examined the response table and/or response graph but also conduct ANOVA for the quality characteristic to find out the optimum parameter levels, whereas the others (Yan and Wang, 2000;Tsai and Wang, 2001) in addition to examining the response table and/or response graph, conduct ANOVA for the signal-to-noise ratio to find out the optimum parameter levels.…”

Section: Introductionmentioning

confidence: 99%

The Alpha Risk of Taguchi Method for LTB Type Quality Characteristic with L8

Li¹,

Kuo²,

Yang³

2006

Qual Quant

View full text Add to dashboard Cite

In Taguchi's parameter design, the significant parameter levels are found by maximising the signal-to-noise ratio of the quality characteristic. In the analysis of variance (ANOVA) of signal-to-noise ratio, the combination of column effects to better estimate error variance is referred to as pooling. Taguchi has suggested the strategy of pooling up. When using the pooling-up strategy, there will be a tendency to make the alpha mistake more often. In this paper, it is assumed that (1) the quality chartacteristic is normally distributed and (2) the mean and standard deviation of each factor level combination are equal, then the null hypothesis should be no significant factor. Thus, the alpha risk is that some factors are misidentified as significant factors. The purpose of this paper is to investigate the alpha risk of the Taguchi method for the-larger-the-better (LTB) type problem with orthogonal array, L 8 , by simulation. The results show that the alpha risk is very high.

show abstract

“…A number of studies have been carried out to determine optimum conditions for dissolution, or for the different scientific aims, are frequently established by Taguchi method due to its advantages over conventional methods [10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%