scholarly journals Recovery of Valuable Metals from Nickel Smelting Slag Based on Reduction and Sulfurization Modification

Minerals ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 1022
Author(s):  
Wei Sun ◽  
Xiong Li ◽  
Runqing Liu ◽  
Qilin Zhai ◽  
Jie Li
Keyword(s):  
Environmental Pollution ◽  
Chemical Phase ◽  
Valuable Metals ◽  
Smelting Slag ◽  
Chemical Phase Analysis ◽  
Complex Forms ◽  
Slag Modification ◽  
Nickel Smelting ◽  
High Yields ◽  
Free Metal

Nickel smelting slag contains valuable metals including nickel and copper. Failure to recycle these metals wastes resources, and disposal of nickel slag in stockpiles results in environmental pollution. Nickel slag recycling is important, and metals can be recovered from slag by flotation. However, considering the complex forms in which valuable metals occur in nickel slag, high yields are difficult to achieve by direct flotation. In this study, nickel slag was modified by reduction and sulfurization to render it more amenable to metal recovery through flotation. The mechanism was assessed based on thermodynamics and elements’ phase distributions. Thermodynamic analyses indicated the feasibility of nickel slag modification by reduction–sulfurization smelting. The results of chemical phase analysis show that the forms in which valuable metals occur in nickel slag can be modified by reduction–sulfurization, and the proportion of metals existing in sulfide and free metal states in nickel slag can be increased. Compared with the direct flotation of raw slag, the recovery of nickel and copper from top-blowing slag increased by 23.03% and 14.63%, respectively. The recoveries of nickel and copper from settling slag increased by 49.68% and 43.65%, respectively.

Research on Chloride Leaching of Cu, Zn and Ag from Flotation Tailings

2011 ◽  
Vol 391-392 ◽  
pp. 1138-1142 ◽  
Author(s):  
Dian Kun Lu ◽  
Li Fang Shi ◽  
Zhe Nan Jin
Keyword(s):  
Leaching Test ◽  
Nacl Solution ◽  
Optimum Conditions ◽  
Flotation Tailings ◽  
Sulphide Minerals ◽  
Chemical Phase ◽  
Valuable Metals ◽  
Chloride Leaching ◽  
Mineral Compositions ◽  
Chemical Phase Analysis

Mineralogical examinations of Asheler copper mine flotation tailings have been carried out. Results show that the major metal sulphide minerals are pyrite and the main gangue constituents are quartz, chlorite-serpentine and muscovite. The main valuable metals are Cu, Zn and Ag. Basic mineral compositions of copper and zinc have been identified through chemical phase analysis. On the basis of mineralogical examinations, leaching test has been carried out in about 240g/l NaCl solution. The optimum conditions for leaching are found as follows: temperature at 86°C, pulp concentration is 24.19%wt, [Cu2+] =19.22g/l, [HCl] initial =0.17mol/L. Under these conditions, chloride leaching can extract 83.35%Cu, 92.10%Zn, and 85.26%Ag after 8 hours leaching.

scholarly journals A new expansion material used for roof-contacted filling based on smelting slag

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Hua Na ◽  
Guocheng Lv ◽  
Lijuan Wang ◽  
Libing Liao ◽  
Dan Zhang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Hydrogen Peroxide ◽  
Compressive Strength ◽  
Sodium Silicate ◽  
Utilization Rate ◽  
Ammonium Bromide ◽  
Foaming Agent ◽  
Copper Nickel ◽  
Smelting Slag ◽  
Nickel Smelting

AbstractThe improper handling of smelting slag will seriously pollute the environment, and the unfilled roof of the goaf of the mine will threaten the safety of the mine. Expansion materials have attracted more and more attention because of their excellent properties. In this paper, copper-nickel smelting slag that has some active ingredients of gelling is used instead of traditional aggregate and some part of cement in order to reduce its pollution to the environment and its costs. For safety reasons, hydrogen peroxide was chosen as the foaming agent. Sodium silicate and hexadecyl trimethyl ammonium bromide (CTAB) are used as additives. Our results showed that after 28 days of curing, the material has better mechanical properties and the early compressive strength of the material was enhanced by sodium silicate. The efficiency of foaming was improved by CTAB. It also proves that copper–nickel smelting slag can be used in expansion material. At the same time, the utilization rate of the copper–nickel smelting slag of this formula can reach 70%, reduce its pollution to the environment.

Preparation and characterization of porous ceramics from nickel smelting slag and metakaolin

2020 ◽  
Vol 46 (4) ◽  
pp. 4581-4586 ◽  
Author(s):  
Qisheng Wu ◽  
Qiujing Chen ◽  
Zichen Huang ◽  
Bin Gu ◽  
Huajun Zhu ◽  
...  
Keyword(s):  
Porous Ceramics ◽  
Smelting Slag ◽  
Nickel Smelting

scholarly journals Synthesis and Characterization of CaxSryBa1-x-yFe12-zLazO19 by Standard Ceramic Method

2013 ◽  
Vol 2013 ◽  
pp. 1-7 ◽  
Author(s):  
Rohit K. Mahadule ◽  
Purushottam R. Arjunwadkar ◽  
Megha P. Mahabole
Keyword(s):  
Dielectric Constant ◽  
Ac Conductivity ◽  
Phenomenological Theory ◽  
Dielectric Polarization ◽  
Ceramic Method ◽  
Chemical Phase ◽  
Ferrite Structure ◽  
Magnetic Dilution ◽  
Chemical Phase Analysis

The polycrystalline compounds with chemical formula CaxSryBa1-x-yFe12-zLazO19 (CSBFLO) were synthesized via standard ceramic method. The chemical phase analysis was carried out by X-ray powder diffraction (XRD) method, which confirmed the formation of the magnetoplumbite phase belonging to ferrite structure. The frequency dependence of AC conductivity and dielectric constant was studied in the frequency range of 10 Hz to 2 MHz. The experimental results revealed that AC conductivity increases with increasing frequency, which is in agreement with Koop’s phenomenological theory. However, variation in dielectric constant required explanation in light of dielectric polarization. Magnetic characterization included studies of parameters such as Ms, Mr, Hc, and Tc, and results were explained via magnetic dilution and canting spin structure.

Chemical phase analysis of zircon refractories

Refractories ◽  
1969 ◽  
Vol 10 (3-4) ◽  
pp. 182-186
Author(s):  
L. V. Bogova
Keyword(s):  
Phase Analysis ◽  
Chemical Phase ◽  
Chemical Phase Analysis

Precipitation Hardening of Titanium Carbides in Ti Micro-Alloyed Ultra-High Strength Steel

2011 ◽  
Vol 284-286 ◽  
pp. 1275-1278
Author(s):  
Xiang Dong Huo ◽  
Sheng Xia Lv ◽  
Xin Ping Mao ◽  
Qi Lin Chen
Keyword(s):  
Precipitation Hardening ◽  
High Strength Steels ◽  
High Strength ◽  
Experimental Methods ◽  
Chemical Phase ◽  
Ultra High Strength Steel ◽  
Average Grain Size ◽  
Chemical Phase Analysis ◽  
Ultra High Strength Steels ◽  
Hot Rolled

New 700MPa hot rolled ultra-high strength steels were successfully developed by using Ti micro-alloying technology in CSP line. Experimental methods, such as OM, TEM and chemical phase analysis, were used to study the experimental steel. The microstructure is composed of quasi-polygonal ferrite grains, whose average grain size is about 4μm. Large number of nanometer TiC particles distribute along dislocations. The mass fraction of MX phase is 0.0793wt%, in which the particles smaller than 10nm account for 33.7%. The contribution of precipitation hardening resulting from nanometer particles is calculated as approximate 158MPa.

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