Hydrometallurgical Pretreatment Process for the Recovery of Valuable Metals from the Lead Anode Slime

2013 ◽  
Vol 813 ◽  
pp. 153-156
Author(s):  
Wen Hua Wu ◽  
Zhi Jian Wang ◽  
Ji Bo Liu
Keyword(s):  
Recovery Rate ◽  
Noble Metals ◽  
Sodium Chlorate ◽  
Anode Slime ◽  
Base Metals ◽  
Oxidation Treatment ◽  
Total Recovery ◽  
Lead Anode ◽  
Crystalline Product ◽  
Valuable Metals

After stacking pre-oxidation treatment, lead anode slime was leached in sulfuric acid added with sodium chloride and oxidant of sodium chlorate. The leaching rates of As, Te, Sb, Bi and Cu are more than 98% with potential controlled at 500mV. And noble metals are left in the residue, which are separated from the base metals effectively. Through cooling and crystallizing out arsenate, the solution is reduced with potential controlled. According to reducing slag, the recovery rate of Te is 96.52%. Sb is recovered by neutralizing hydrolysis and the recovery rate is 95.2%. By the effect of iron powder, As, Bi and Cu are entirely reduced with the recovery rates of Bi and Cu to be 91.56% and 83.49%, respectively. The total recovery of As from the crystalline product and reducing slag achieves 91.56%.

scholarly journals Vacuum Gasification-Directional Condensation for Separation of Tellurium from Lead Anode Slime

Metals ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 1535
Author(s):  
Zhe Gao ◽  
Xiangfeng Kong ◽  
Jiafei Yi ◽  
Bin Yang ◽  
Baoqiang Xu ◽  
...  
Keyword(s):  
Base Material ◽  
Volatile Matter ◽  
Ecological Environment ◽  
Anode Slime ◽  
Solar Panels ◽  
Lead Anode ◽  
Distillation Temperature ◽  
System Pressure ◽  
Valuable Metals ◽  
Temperature Time

Tellurium is the indispensable base material of semiconductors in solar panels. Traditional tellurium recycling, a highly complicated separation process, has exhausted reagents and energy sources whilst producing waste residue and water containing multitudinous heavy metal that is hugely harmful to the ecological environment. A clean and eco-friendly vacuum distillation-directional condensation treatment was investigated for its potential to recycle tellurium from tellurium-rich lead anode slime (TLAS). The optimal distillation temperature and response time conditions of 1173 K and 50 min were obtained based on a large number of experiments. Gasification results indicated that under the optimal conditions of distillation temperature 1173 K, constant temperature time 50 min, and system pressure 5–15 Pa, 92% of tellurium was volatilized and enriched into the condenser from TLAS. Condensate results revealed that 88% of elemental tellurium was directly recovered in the volatile matter. The appropriate gasification-condensation processes realized a clean utilization to extract tellurium and separate multi valuable metals effectively.

Rapid microwave-assisted acid extraction of southern pine waste wood to remove metals from chromated copper arsenate (CCA) treatment

Holzforschung ◽  
2013 ◽  
Vol 67 (3) ◽  
pp. 285-290 ◽  
Author(s):  
Chung Y. Hse ◽  
Todd F. Shupe ◽  
Bin Yu
Keyword(s):  
Recovery Rate ◽  
Chromated Copper Arsenate ◽  
Copper Extraction ◽  
Acid Extraction ◽  
Southern Pine ◽  
Waste Wood ◽  
Total Recovery ◽  
Wood Particles ◽  
One Step ◽  
Copper Arsenate

Abstract Recovery of metals from chromated copper arsenate (CCA)-treated southern pine wood particles was investigated by extraction in a microwave reactor with binary combinations of acetic acid (AA), oxalic acid (OxA), and phosphoric acid (PhA). Use of OxA was not successful, as insoluble copper oxalate complexes impeded copper removal. The combination of OxA and AA also had adverse effects on copper extraction. In contrast, the combination of AA and PhA enhanced the chromium recovery rate. The highest recovery rate of metals could be achieved with a mixture of 2.75% PhA and 0.5% AA at 130°C for 10 min in the microwave oven. The total recovery rate approached 100% for arsenic, 96.7% for chromium, and 98.6% for copper in a one-step process.

Preparation of pure SbCl3 from lead anode slime bearing high antimony and low silver

2010 ◽  
Vol 20 (12) ◽  
pp. 2397-2403 ◽  
Author(s):  
Hua-zhen CAO ◽  
Jin-zhong CHEN ◽  
Hai-jun YUAN ◽  
Guo-qu ZHENG
Keyword(s):  
Anode Slime ◽  
Lead Anode

scholarly journals Hydrogenetic, Diagenetic and Hydrothermal Processes Forming Ferromanganese Crusts in the Canary Island Seamounts and Their Influence in the Metal Recovery Rate with Hydrometallurgical Methods

Minerals ◽  
2019 ◽  
Vol 9 (7) ◽  
pp. 439 ◽  
Author(s):  
Egidio Marino ◽  
Francisco Javier González ◽  
Thomas Kuhn ◽  
Pedro Madureira ◽  
Anna V. Wegorzewski ◽  
...  
Keyword(s):  
Canary Islands ◽  
Recovery Rate ◽  
Inductively Coupled Plasma ◽  
Metal Recovery ◽  
Critical Metals ◽  
Total Recovery ◽  
Inductively Coupled ◽  
Ferromanganese Crusts ◽  
Electron Probe Micro Analyzer ◽  
Hydrometallurgical Method

Four pure hydrogenetic, mixed hydrogenetic-diagenetic and hydrogenetic-hydrothermal Fe-Mn Crusts from the Canary Islands Seamount Province have been studied by Micro X-Ray Diffraction, Raman and Fourier-transform infrared spectroscopy together with high resolution Electron Probe Micro Analyzer and Laser Ablation Inductively Coupled Plasma Mass Spectrometry in order to find the correlation of mineralogy and geochemistry with the three genetic processes and their influence in the metal recovery rate using an hydrometallurgical method. The main mineralogy and geochemistry affect the contents of the different critical metals, diagenetic influenced crusts show high Ni and Cu (up to 6 and 2 wt. %, respectively) (and less Co and REY) enriched in very bright laminae. Hydrogenetic crusts on the contrary show High Co and REY (up to 1 and 0.5 wt. %) with also high contents of Ni, Mo and V (average 2500, 600 and 1300 μg/g). Finally, the hydrothermal microlayers from crust 107-11H show their enrichment in Fe (up to 50 wt. %) and depletion in almost all the critical elements. One hydrometallurgical method has been used in Canary Islands Seamount Province crusts in order to quantify the recovery rate of valuable elements in all the studied crusts except the 107-11H, whose hydrothermal critical metals’ poor lamina were too thin to separate from the whole crust. Digestion treatment with hydrochloric acid and ethanol show a high recovery rate for Mn (between 75% and 81%) with respect to Fe (49% to 58%). The total recovery rate on valuable elements (Co, Ni, Cu, V, Mo and rare earth elements plus yttrium (REY)) for the studied crusts range between 67 and 92% with the best results for Co, Ni and V (up to 80%). The genetic process and the associated mineralogy seem to influence the recovery rate. Mixed diagenetic/hydrogenetic crust show the lower recovery rate for Mn (75%) and Ni (52.5%) both enriched in diagenetic minerals (respectively up to 40 wt. % and up to 6 wt. %). On the other hand, the presence of high contents of undigested Fe minerals (i.e., Mn-feroxyhyte) in hydrogenetic crusts give back low recovery rate for Co (63%) and Mo (42%). Finally, REY as by-product elements, are enriched in the hydrometallurgical solution with a recovery rate of 70–90% for all the studied crusts.

scholarly journals Direct Base-Assisted C‒H Cyclonickelation of 6-Phenyl-2,2′-bipyridine

Molecules ◽  
2020 ◽  
Vol 25 (4) ◽  
pp. 997
Author(s):  
Nicolas Vogt ◽  
Vasily Sivchik ◽  
Aaron Sandleben ◽  
Gerald Hörner ◽  
Axel Klein
Keyword(s):  
Elevated Temperature ◽  
Title Compound ◽  
Noble Metals ◽  
Oxidative Addition ◽  
Base Metals ◽  
Base Pairs ◽  
Reaction Conditions ◽  
Wide Range ◽  
The World ◽  
First Time

The organonickel complexes [Ni(Phbpy)X] (X = Br, OAc, CN) were obtained for the first time in a direct base-assisted arene C(sp2)–H cyclometalation reaction from the rather unreactive precursor materials NiX2 and HPhbpy (6-phenyl-2,2′-bipyridine) or from the versatile precursor [Ni(HPhbpy)Br2]2. Different from previously necessary C‒Br oxidative addition at Ni(0), an extended scan of reaction conditions allowed quantitative access to the title compound from Ni(II) on synthetically useful timescales through base-assisted C‒H activation in nonpolar media at elevated temperature. Optimisation of the reaction conditions (various bases, solvents, methods) identified 1:2 mixtures of acetate and carbonate as unrivalled synergetic base pairs in the optimum protocol that holds promise as a readily usable and easily tuneable access to a wide range of direct nickelation products. While for the base-assisted C‒H metalation of the noble metals Ru, Ir, Rh, or Pd, this acetate/carbonate method has been established for a few years, our study represents the leap into the world of the base metals of the 3d series.

A cleaning process for the removal and stabilisation of arsenic from arsenic-rich lead anode slime

2018 ◽  
Vol 176 ◽  
pp. 26-35 ◽  
Author(s):  
Yongming Chen ◽  
Nannan Liu ◽  
Longgang Ye ◽  
Shan Xiong ◽  
Shenghai Yang
Keyword(s):  
Anode Slime ◽  
Cleaning Process ◽  
Lead Anode

Search and Synthesis of New Family of Quasicrystals

2003 ◽  
Vol 805 ◽  
Author(s):  
Tsutomu Ishimasa ◽  
Shiro Kashimoto ◽  
Ryo Maezawa
Keyword(s):  
Electron Concentration ◽  
Noble Metals ◽  
Alloy Composition ◽  
Starting Material ◽  
Icosahedral Quasicrystal ◽  
Base Metals ◽  
Transition Elements ◽  
New Family ◽  
Cast Alloys ◽  
P Type

ABSTRACTStarting from the Zn17Sc3 cubic approximant, new icosahedral quasicrystal was searched by substituting Zn by other metals, M, at the alloy composition of Zn75M10Sc15. In the cases of M = Mn, Fe, Co, Ni, Pd, Pt, Ag and Au, new P-type quasicrystals were discovered in as-cast alloys. In the cases of M = Fe, Co, Ni, Pd and Ag, the quasicrystals are thermodynamically stable at approximately 700 °C. This result indicates that use of an approximant crystal as a starting material is very efficient way to search new quasicrystal alloy, and many kinds of metals stabilize the quasicrystal structures; i.e. noble metals and transition elements including Mn, Fe, Co and Ni in addition to Mg. Taking the variety in base metals of Tsai-type approximants into account, this variety in additional components suggests many possibilities of undiscovered quasicrystals. The equality ofthe electron concentration, ela ≈ 2.1, in Hume-Rothery rule may be a guide to these quasicrystals.

A Longitudinal Study of Stuttering in Children

1996 ◽  
Vol 39 (4) ◽  
pp. 826-826 ◽  
Author(s):  
Ehud Yairi ◽  
Nicoline Ambrose
Keyword(s):  
Longitudinal Study ◽  
Recovery Rate ◽  
Preliminary Report ◽  
Spontaneous Recovery ◽  
Statistical Significance ◽  
Treated Group ◽  
Untreated Group ◽  
Success Rates ◽  
Total Recovery ◽  
Post Onset

It has come to our attention that minor errors occurred in Table 3 on p. 759 of the Yairi and Ambrose article, "A Longitudinal Study of Stuttering in Children: A Preliminary Report," which appeared in the August 1992 issue (Vol. 35, pp. 755–760). A revised version of the table appears below that includes both the original values and the corrected values (in boldface). As can be seen, the differences are indeed minor. The changes do not affect the reported patterns or level of statistical significance. In the untreated group, 7 or 78% recovered by 24 months post-onset and 1 additional subject recovered later, making a total recovery rate of 89%, with 11% persistent. In the treated group, 11 or 61% recovered by 24 months post-onset and an additional 5 recovered later, again totalling 89% recovery and 11% persistent. These data do not in any way indicate that treatment is not beneficial nor that it has no effect but simply that success rates for treated individuals must take spontaneous recovery into account. We regret the error.

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