Chinese︱Feedback︱Save this page

Login︱Register

• Elaborating Academic Views 　　　　 • Exchanging Innovative Ideas
• Protecting Intellectual Properties 　　• Fast Sharing Science Papers

Sponsored by the Center for Science and Technology Development of the Ministry of Education
Supervised by Ministry of Education of the People's Republic of China

Home > Papers > Hydrometallurgy

There are 8 papers published in subject: > since this site started.

Results per page:

Select Subject

All (8828)

Agronomy (158)

Animal Husbandry,... (64)

Aquatic Science (16)

Astronomy (36)

Aviation (22)

Basic Medicine (184)

Biology (504)

Chemical Engineering (103)

Chemistry (635)

Civil and Archite... (105)

Clinical Medicine (236)

Computer Science ... (924)

Dynamic and Elect... (121)

Earth Science (119)

Economics (67)

Education (31)

Electrics, Commun... (927)

Energy Science an... (67)

Engineering and T... (15)

Environmental Sci... (140)

Food Science and ... (63)

Forestry (36)

Hydraulic Enginee... (40)

Mechanics (240)

Metallurgical Eng... (32)

Mine Engineering ... (38)

Nuclear Science a... (21)

Pharmacy (98)

Physics (920)

Preventive Medici... (37)

Psychology (20)

Security Science ... (17)

Sports Science (6)

Surveying and Map... (15)

Textile Science a... (16)

Traditional Chine... (56)

Transportation En... (57)

Rank

Results per page:

Alert Name:
Alerting to:
Authentication email will be sent to your email address in 24 hours
Frequency:
Email Message Format:	Plain text Graphical(HTML)

Complete the form below and we will recommend the selected titles to your friends on your behalf. * Indicates a required field.
Your name*:
Your email address*:
Recipient's name*:
Recipient's email address*:
(multiple recipient's names and email addresses should be separated with semicolons)
Your comments:	I thought you would find the page(s) useful.

Your name:
Your email address:
Recipient's name:
Recipient's email address:
(multiple recipient's names and email addresses should be separated with semicolons)
Your comments:	I thought you would find this page useful.

Disclaimer: This message was sent to your friend using the "Send it to a friend" facility on the Sciencepaper Online’ WWW site, http://www.paper.edu.cn/en. The Sciencepaper Online is not responsible for the content of this email, and anything said in this email does not necessarily reflect the Sciencepaper Online's views.


	1. Rotating disc electrode measurements of oxygen reductionreaction on natural massive pyrite in acidic media
	CHEN Guobao,YANG Hongying
	Metallurgical Engineering 18 March 2016
	Show/Hide Abstract \| Cite this paper︱Full-text: PDF (0 B)

	Abstract:In the current study, rotating disk electrode (RDE) measurements were performed to gain insight into the oxygen reduction reaction (ORR) performance of the natural massive pyrite electrode in acidic media. Cyclic voltammetry (CV) and linear sweep voltammetry (LSV) were also performed. The tafel slopes and electron transferred numbers were calculated according to the test results. The ORR process took place in the potential range of ?0.450 V to 0.050 V vs. AgCl/Ag. The average transferred electron number for ORR on pyrite in sulfuric acid was near to 2. The addition of ferric ion was shown to increase the dissolution rate of pyrite and the transferred electron numbers for ORR. At high concentration of ferric ion, the ORR process was inhibited attributing to a Fenton-like reaction mechanism and more intermediate H2O2 was produced accordingly.
	TO cite this article:CHEN Guobao,YANG Hongying. Rotating disc electrode measurements of oxygen reductionreaction on natural massive pyrite in acidic media[OL].[18 March 2016] http://en.paper.edu.cn/en_releasepaper/content/4681002


	2. Solvent extraction of vanadium from a H2SO4-HF mixed acids leaching solution of stone coal
	LI Xingbin,WEI Chang,LI Cunxiong,DENG Zhigan,LI Minting,FAN Gang
	Metallurgical Engineering 02 November 2014
	Show/Hide Abstract \| Cite this paper︱Full-text: PDF (0 B)

	Abstract:Di (2-ethylhexyl) phosphoric acid (P204) and tri-n-butyl phosphate (TBP) were used to extraction vanadium from a H2SO4-HF mixed acids leaching solution of stone coal in this paper. Effect of different operational factors such as equilibrium pH, extractant concentration, extraction stage, strip solution concentration, phase ratio were examined to optimize the condition for selective and quantitative extraction and stripping of vanadium. Based on the results of extraction as well as stripping isotherm, the extraction of vanadium was quantitative in six stages using 10% P204 and 5% TBP at A:O ratio of 1:1 and equilibrium pH of 2.4; 99.6% percentage stripping of vanadium from the loaded organic phase was obtained by five stage stripping using 1.5 mol/L H2SO4 at A:O ratio of 1:8. In the solvent extraction process, scrubbing is necessary for removing co-extracted and entrainment impurities by dilute sulfuric acid solution, more than 90% iron and arsenic can be scrubbed by 0.2 mol/L sulfuric acid.
	TO cite this article:LI Xingbin,WEI Chang,LI Cunxiong, et al. Solvent extraction of vanadium from a H2SO4-HF mixed acids leaching solution of stone coal[OL].[ 2 November 2014] http://en.paper.edu.cn/en_releasepaper/content/4616474

Saved Papers

Saved Papers


	3. Solvent extraction of vanadium (IV) from sulfuric acid solution using P507
	LI Xingbin,WEI Chang,DENG Zhigan,LI Minting,LI Cunxiong,FAN Gang
	Metallurgical Engineering 29 October 2014
	Show/Hide Abstract \| Cite this paper︱Full-text: PDF (0 B)

	Abstract:Solvent extractionof vanadium(IV) from sulfuric acid solution has been studied using 2-ethyhexyl phosphonic acid mono 2-ethylhexyl ester (P507) dissolved in kerosene. The different affecting parameters of equilibrium pH, extractant concentration, temperature and extraction isotherm were separately investigated. The extraction of vanadium(IV) from a synthetic sulfuric acid leach solution of stone coal was also examined. The equilibrium study indicated the release of two moles of H+ ions for extraction of one mole of vanadium(IV) and association of two moles of the mono extractant in the extracted species. The extracted complex VOA2 was calculated from slope analysis and confirmed by IR spectra. A positive value of ΔH obtained from temperature variation studies show that the extraction process is endothermic reaction. A continuous counter current simulation extractionand stripping confirmed 96.1% extraction and 99.6% stripping, further attributes to the enrichment 5 times of vanadium(IV) concentration in the strip solution.
	TO cite this article:LI Xingbin,WEI Chang,DENG Zhigan, et al. Solvent extraction of vanadium (IV) from sulfuric acid solution using P507[OL].[29 October 2014] http://en.paper.edu.cn/en_releasepaper/content/4615430


	4. Isotherm, kinetics and thermodynamic studies of adsorption of Cu2+ from aqueous solutions by Mg2+/K+ type orange peel adsorbents
	Guo Xueyi,Liang Sha,Feng Ningchuan,Tian Qinghua
	Metallurgical Engineering 03 July 2009
	Show/Hide Abstract \| Cite this paper︱Full-text: PDF (0 B)

	Abstract:Orange peel was used as raw material to prepare two novel orange peel adsorbents MgOP and KOP. FTIR and SEM were used to characterize the adsorbents. Effects of pH, solid/liquid ratio, time and metal ion concentration on the Cu2+ adsorption were investigated by these two adsorbents. The equilibrium data were analyzed by using Langmuir, Freudlich, Temkin and Dubinin-Radushkevich models. Langmuir model provides the best correlation for the adsorption of Cu2+ by both MgOP and KOP, and the mono-layer adsorption capacity for Cu2+ removal by MOP and KOP are 40.37 and 59.77mg/g, respectively. The adsorbed amounts of Cu2+ increased with the increase in contact time and reached equilibrium within 20min. Kinetics data were analyzed using four adsorption kinetic models: the pseudo-first and second-order equations, the Elovich equation and intraparticle diffusion equation. The experimental data fit well the pseudo-second-order equation, which indicates the adsorption of Cu2+ by MgOP and KOP may follow a chemisorption mechanism. Thermodynamic studies showed the spontaneous, exothermic nature of the adsorption of Cu2+ by MgOP and KOP.
	TO cite this article:Guo Xueyi,Liang Sha,Feng Ningchuan, et al. Isotherm, kinetics and thermodynamic studies of adsorption of Cu2+ from aqueous solutions by Mg2+/K+ type orange peel adsorbents [OL].[ 3 July 2009] http://en.paper.edu.cn/en_releasepaper/content/33622


	5. Researches on sodium-modification of Hunyuan Ca-based bentonite by suspension method
	zhang yuanbo,chen liyong,li guanghui,li qian,jiang tao
	Metallurgical Engineering 15 June 2009
	Show/Hide Abstract \| Cite this paper︱Full-text: PDF (0 B)

	Abstract:Being high dispersity, hydrophilic property and viscosity, bentonite is widely used in the pellet production. Hunyuan bentonite is one of large-type bentonite deposits in China, the reserve of which is more than 0.15 billion tons. However, it is a kind of typical Ca-bentonite (Ca-Bent), not completely utilized in the pellets presently. The sodium-modification of the Ca-bent is investigated by means of suspend liquid in this paper. To begin with, the process mineralogy of the sample is carried out, based on which, different factors (sodium agent and dosage, pulp density, sodium temperature and sodium time, etc.) affecting the sodium-modification are researched. The results show that the alkali coefficient K of modified bentonite is increased from 0.34 to 1.33, and the 2HWA, dilation and colloid index are respectively increased to 601%, 32.4mL/g and 87.6mL/(3g) under the optimal conditions of Na2CO3 dosage 3.0%, pulp density 20%, sodium temperature 55℃ and sodium time 0.5h. The XRD patterns of the bentonite before and after sodium-modification show the d(001) from 1.5539nm reduces to 1.2467nm, and 2θ(001) from 5.6875° increases to 7.0907°, indicating that the Hunyuan Ca-bent is effectively modified into Na-Bent. This investigation can provide a feasible route for the utilization of Hunyuan bentonite.
	TO cite this article:zhang yuanbo,chen liyong,li guanghui, et al. Researches on sodium-modification of Hunyuan Ca-based bentonite by suspension method[OL].[15 June 2009] http://en.paper.edu.cn/en_releasepaper/content/33155


	6. Preparation and evaluation of orange peel xanthate for effective removal of heavy metals from aqueous solutions
	Guo Xueyi,Liang Sha,Feng Ningchuan,Tian Qinghua
	Metallurgical Engineering 02 April 2009
	Show/Hide Abstract \| Cite this paper︱Full-text: PDF (0 B)

	Abstract:The preparation of orange peel xanthate and its adsorption behaviors of heavy metals: Cu2+, Cd2+, Pb2+, Zn2+, Ni2+ were studied. FTIR spectrum and zeta potentials were used to characterize the prepared orange peel xanthate. Effects of various parameters including equilibrium pH, initial ion concentration and contact time on the adsorption processes for the five metal ions were investigated. For all five metal ions, adsorption isotherms were found to fit Langmuir model and the maximum adsorption capacities of Cu2+, Cd2+, Pb2+, Zn2+ and Ni2+ were obtained as 77.60, 76.57, 218.34, 49.85 and 15.45 mg•g-1, respectively. All adsorption processes can attain equilibrium within 20 min and kinetics was well fitted by psesudo-second order equation. It is proposed that the adsorption mechanism was complexation.
	TO cite this article:Guo Xueyi,Liang Sha,Feng Ningchuan, et al. Preparation and evaluation of orange peel xanthate for effective removal of heavy metals from aqueous solutions [OL].[ 2 April 2009] http://en.paper.edu.cn/en_releasepaper/content/31025


	7. Application of orange peel xanthate for the adsorption of Pb2+ from aqueous solutions
	Liang Sha,Guo Xueyi,Feng Ningchuan,Tian Qinghua
	Metallurgical Engineering 24 January 2009
	Show/Hide Abstract \| Cite this paper︱Full-text: PDF (0 B)

	Abstract:Pristine orange peel was chemically modified by introducing sulphur groups with the carbon disulfide treatment in alkaline medium. The presence of sulphur groups on orange peel xanthate were identified by FTIR spectroscopic study. Equilibrium isotherms and kinetics were obtained and the effect of various parameters including equilibrium pH, contact time, temperature and initial ion concentration on adsorption of Pb2+ were studied by batch experiments. The maximum adsorption capacity of orange peel xanthate was 204.50 mg•g-1, which was found to increase by about 150% compared to that of pristine orange peel. The adsorption process can attain equilibrium within 20 min, and kinetics was found to be best-fit pseudo-second order equation. Temperature has little effect on the adsorption capacity of orange peel xanthate. In addition, the adsorption mechanism was proposed.
	TO cite this article:Liang Sha,Guo Xueyi,Feng Ningchuan, et al. Application of orange peel xanthate for the adsorption of Pb2+ from aqueous solutions[OL].[24 January 2009] http://en.paper.edu.cn/en_releasepaper/content/28314


	8. Adsorption of copper and cadmium ions from aqueous solution by chemically modified orange peel
	Liang Sha,Guo Xueyi,Feng Ningchuan,Tian Qinghua
	Metallurgical Engineering 22 January 2009
	Show/Hide Abstract \| Cite this paper︱Full-text: PDF (0 B)

	Abstract:The present article describes the adsorption behaviors of Cu2+ and Cd2+ on chemically modified waste orange peel. The adsorbents were characterized using scanning electron microscopy and infrared spectrophotometer. The effect of various parameters like solution pH, shaking time, initial metal ion concentration and temperature on adsorption efficiencies of these two metals were studied systematically by batch experiments.. Adsorption isotherms of these two metals on orange peel and chemically modified orange peel were obtained and compared with Langmuir and Freundlich type models. The rate of adsorption of Cu2+ and Cd2+ on chemically modified orange peel at a constant temperature (25 oC) found to follow a pseudo-second order equation, indicating their chemical adsorption. Temperature has a negative impact on Cu2+ adsorption, while Cd2+ adsorption found to be more or less independent of temperature. Maximum adsorption capacities of Cu2+ and Cd2+ on the chemically modified orange peel were found to be 70.67 and 136.05 mg/g, respectively. Adsorption–desorption studies made on chemically modified orange peel showed that, the adsorption capacities remain high until 5th cycle. This study demonstrated that, the waste orange peel after simple chemical treatment could be used as a potential adsorbent for toxic metals such as Cu and Cd.
	TO cite this article:Liang Sha,Guo Xueyi,Feng Ningchuan, et al. Adsorption of copper and cadmium ions from aqueous solution by chemically modified orange peel[OL].[22 January 2009] http://en.paper.edu.cn/en_releasepaper/content/28246

	Check out RSS, or use RSS reader to subscribe this item