2009-8-27 Leaching 7.5 Adsorption 5.2 Elution 3.5 Gold refining 4.2 Reagent make-up and dosing 1.4 Residue disposal 1.0 Tailings dam 5.5 Indirects 9.2 Table II Typical operating cost breakdown Item % of operating Reagents and chemicals 12.2 Consumables 16.3 Utilities 26.7 Maintenance 3.38 Labour 37.9 Tailings dam 0.8 Assays 2.8
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Acid leaching residue of asbestos tailings was calcined at 600°C. N2 adsorption and desorption isotherms of this modified mineral material were measured at low temperature and the adsorption characteristic of acid leaching residue as well as the mechanism were discussed. The specific surface area of acid leaching residue was calculated by BET model, and meanwhile micropore and mesopore ...
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2021-1-26 Leaching behaviors of calcium and magnesium in ion-adsorption rare earth tailings with magnesium sulfate Bo FAN1,2, Long-sheng ZHAO1,3, Zong-yu FENG 1,3, De-peng LIU , Wei-Qiang YIN 1,3, Zhi-qi LONG , Xiao-wei HUANG1,3 1. National Engineering Research Center for Rare Earth Materials, GRINM Group Co., Ltd., Beijing 100088, China; 2.
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2021-1-1 The leaching behaviors of calcium and magnesium in the rare earth tailings leached with magnesium sulfate using deionized water, CaCl 2 solution and lime water were investigated. Experimental data indicated that magnesium in the tailings was easy to be leached out since most of the magnesium was in the form of water-soluble phase.
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Preparation and adsorption characteristics for heavy metals of active silicon adsorbent from leaching residue of lead-zinc tailings . By Chang Lei, Bo Yan, Tao Chen and Xian-Ming Xiao. Cite . BibTex; Full citation Abstract. To comprehensively reuse the leaching residue obtained from lead-zinc tailings, an active silicon adsorbent (ASA) was ...
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2019-11-1 Preparation and adsorption characteristics for heavy metals of active silicon adsorbent from leaching residue of lead-zinc tailings. Environmental Science and Pollution Research ( IF 3.056 ) Pub Date : 2018-05-21 , DOI: 10.1007/s11356-018-2194-9
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2017-3-13 9% of the cyanide lost in the leach and adsorption section could be attributed to HCN volatilisation. As for the tailings storage facility, the model assigned 63% of the cyanide lost from the tailings storage facility to HCN volatilisation, of which 95% occurred from the area on the tailings dam surface covered in a thin liquid film.
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2021-5-20 The maximum adsorption capacity of MS-400 for MB are compared to other adsorbents reported in literature and listed in Table 5. It is clear that the obtained mesoporous silica material (MS-400) from iron ore tailings shows excellent adsorption performance for MB.
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2018-8-30 To overcome the serious water pollution and landslides that occur in response to in situ ion-adsorption rare earths (IAREs) leaching, it is essential to identify highly efficient and environmentally benign leaching reagents. Therefore, the leaching
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2021-4-26 The results indicated that an electric field enhanced the leaching of POFTs and promoted the adsorption and precipitation of Mn 2+ and NH 4 +-N. The concentrations of Mn 2+ , NH 4 + -N, PO 4 3- and F - in EMRL were 0.12 mg/L, 9.2 mg/L, 0.09 mg/L, and 0.24 mg/L, respectively, which were within the permitted level for the integrated wastewater discharge standard (GB8978-1996) after adjusting the ...
More2019-4-10 After the leaching is completed, the cyanide tailings are washed with water. (3) tailings discharge: there are two kinds of dry and wet methods. The dry method discharges the cyanide tailings through the bottom working door; the wet method is to wash the cyanide tailings with high pressure water, and let the tailings slurry flow along the pre ...
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2011-6-30 The aim of this study is to develop a new method for the preparation of high-value, environmentally friendly products from tailings. Magnetic Fe 3 O 4 nano-powder was synthesized by ultrasonic-assisted chemical co-precipitation utilizing high purity iron separated from iron ore tailings by acidic leaching method. Magnetite particles with 15 nm average diameter were characterized by X-ray ...
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HZE strongly recommend that the tailings after leaching and adsorption are dewatered by the filters for the filtrate is returned back to the production water pond for recycling in the plant. The residual cyanide or other chemicals are reused, the consumption of the chemicals is reduced and the environment is protected, and the hazardous chemicals are prevented from being discharged outside the ...
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Ion exchange resins are particularly suitable for extracting separated metals from low grade minerals and tailings leaching or slurry， it plays an important role in separating metals with similar properties. Ion exchange resins are used in the extraction of various metals, including rare metals and
MoreStudy Progress in the Preparation Coagulant by Industrial Waste ZHANG Guang-Wen1,a,LIU Yang2,b, ZHANG Pu-Xuan2,c*, SUN Mo-Jie2,d 1S h e nua B iji gG oEl c tr iP w R sea I ,C .L d 1 000 2S c holf C em iaE ngee r , N tea st Di li U v y Jili 132012 aghjs 6 8 12 @3 , b5 9 74 qc1 5 7438 @ q, d m Key word: industrial waste; coagulant; preparation; water treatment
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HZE strongly recommend that the tailings after leaching and adsorption are dewatered by the filters for the filtrate is returned back to the production water pond for recycling in the plant. The residual cyanide or other chemicals are reused, the consumption of the chemicals is reduced and the environment is protected, and the hazardous ...
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2019-3-1 In this study, thermally modified copper tailings (TMCT) were used to adsorb phosphate in aqueous solutions through experiments. The characterization of TMCT and unmodified copper tailings (UMCT) was done by scanning electron microscopy (SEM) and Brunauer-Emmett-Teller (BET) analysis. The effects of pH, adsorbent dosage, contact time, and initial phosphate concentrations on phosphate ...
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2020-12-2 Before the adsorption of cyaniding pulp, remove the wood chips to avoid it adsorbs the gold and blocks the carbon screen. Leaching and adsorption of gold CIP production line. Adding carbon in the leaching tank; the carbon absorbs gold becoming gold loaded carbon. After adsorption, carbon screen separates the carbon and pulp.
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The loading amount of chitosan determined the adsorption capacity of the material. When the chitosan content below 12.07% wt%, the sample has a strong adsorption capacity for heavy metal ions, and the adsorption capacities for Ni 2+, Cu 2+, Pb 2+, Ag +, and Cd 2+ reach 2.47, 7.27, 8.84, 5.15, and 4.29 m mol/g, respectively. This kind of green ...
More2019-4-10 After the leaching is completed, the cyanide tailings are washed with water. (3) tailings discharge: there are two kinds of dry and wet methods. The dry method discharges the cyanide tailings through the bottom working door; the wet method is to wash the cyanide tailings with high pressure water, and let the tailings slurry flow along the pre ...
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2019-3-29 2. Adsorption: Adding activated carbon to the fully leaching pulp, and the activated carbon will absorb the gold in the cyanide pulp then become the gold-bearing carbon. The whole adsorption operations carried out in the adsorption tank (carbon slurry tank). There are various types of adsorption
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2011-4-22 Iron ore tailings were weighed (100 g), and mixed with 37.5 wt.% hydrochloric acid (HCl). Then pickling was filtered out and collected. An appropriate amount of hydrogen peroxide (H 2O 2) was added to the filtrate so that all iron could exist in the Fe3+ form. Filtrate was heated to 60 °C, and its pH value was adjusted to 3.2 by adding an
MoreHZE strongly recommend that the tailings after leaching and adsorption are dewatered by the filters for the filtrate is returned back to the production water pond for recycling in the plant. The residual cyanide or other chemicals are reused, the consumption of the chemicals is reduced and the environment is protected, and the hazardous chemicals are prevented from being discharged outside the ...
More2019-3-1 In this study, thermally modified copper tailings (TMCT) were used to adsorb phosphate in aqueous solutions through experiments. The characterization of TMCT and unmodified copper tailings (UMCT) was done by scanning electron microscopy (SEM) and Brunauer-Emmett-Teller (BET) analysis. The effects of pH, adsorbent dosage, contact time, and initial phosphate concentrations on phosphate ...
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2018-6-4 Heavy metal-contaminated soils were leached with various acid reagents, and a series of treatments was assessed to understand soil fertility after acid leaching. Aqua regia digestion and a five-step sequential extraction procedure were applied to determine heavy metal distribution. The average total concentrations of Zn, Cd, Cu, and Pb for contaminated soil were 1334, 25, 263, and 525#x2009 ...
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2021-5-1 They synthesized iron oxide nanoparticles from waste iron ore tailings using acid leaching, followed by precipitation of ferric hydroxide. Other possible valorization of ferrous wastes is the obtaining of ferrous sulfate heptahydrate from pickling solutions by cooling and evaporating the solution to 5 °C, followed by crystallization of FeSO 4 ...
MoreThe loading amount of chitosan determined the adsorption capacity of the material. When the chitosan content below 12.07% wt%, the sample has a strong adsorption capacity for heavy metal ions, and the adsorption capacities for Ni 2+, Cu 2+, Pb 2+, Ag +, and Cd 2+ reach 2.47, 7.27, 8.84, 5.15, and 4.29 m mol/g, respectively. This kind of green ...
More2019-10-16 Africa has the second largest ultimately recoverable resources (URR) of gigaton (Gt) iron (Fe) ore in the world. South Africa is among the countries in the world with high-quality iron ore deposits. The most significant sources of Fe ore in the African continent are hosted by the banded iron ore formation of Precambrian age with high-quality hematite (Fe2O3) bodies.
More2019-4-10 After the leaching is completed, the cyanide tailings are washed with water. (3) tailings discharge: there are two kinds of dry and wet methods. The dry method discharges the cyanide tailings through the bottom working door; the wet method is to wash the cyanide tailings with high pressure water, and let the tailings slurry flow along the pre ...
More2011-4-22 Iron ore tailings were weighed (100 g), and mixed with 37.5 wt.% hydrochloric acid (HCl). Then pickling was filtered out and collected. An appropriate amount of hydrogen peroxide (H 2O 2) was added to the filtrate so that all iron could exist in the Fe3+ form. Filtrate was heated to 60 °C, and its pH value was adjusted to 3.2 by adding an
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Gold CIL leaching process is an efficient method for extracting and recovering gold from rock gold and gold tailings. By adding activated carbon to the slurry and simultaneously leaching and adsorbing gold, it include leaching pulp preparation, cyanide leaching, activated carbon adsorption, the electric shock to get gold mud, to take off the ...
More2018-6-4 Heavy metal-contaminated soils were leached with various acid reagents, and a series of treatments was assessed to understand soil fertility after acid leaching. Aqua regia digestion and a five-step sequential extraction procedure were applied to determine heavy metal distribution. The average total concentrations of Zn, Cd, Cu, and Pb for contaminated soil were 1334, 25, 263, and 525#x2009 ...
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Each leaching adsorption tank is equipped with a carbon screen to separate the carbon and the slurry. The slurry flows in the forward direction and the activated carbon flows in the reverse direction, that is, the slurry and the activated carbon are adsorbed in a countercurrent flow. Fresh activated carbon is added from the last leaching ...
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The adsorption experiments showed that the as-prepared MoS 2 NS also exhibited remarkable adsorption performance on the dyes (344.8 and 123.5 mg g −1 of q m for methylene blue and methyl orange, respectively) and heavy metals (185.2, 169.5, and 70.4 mg g −1 of q m for Cd 2+, Cu 2+, and Ag +). During the adsorption, the main adsorption ...
More2021-5-1 They synthesized iron oxide nanoparticles from waste iron ore tailings using acid leaching, followed by precipitation of ferric hydroxide. Other possible valorization of ferrous wastes is the obtaining of ferrous sulfate heptahydrate from pickling solutions by cooling and evaporating the solution to 5 °C, followed by crystallization of FeSO 4 ...
MoreThe loading amount of chitosan determined the adsorption capacity of the material. When the chitosan content below 12.07% wt%, the sample has a strong adsorption capacity for heavy metal ions, and the adsorption capacities for Ni 2+, Cu 2+, Pb 2+, Ag +, and Cd 2+ reach 2.47, 7.27, 8.84, 5.15, and 4.29 m mol/g, respectively. This kind of green ...
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International Journal of Minerals, Metallurgy and Materials (IJMMM, ISSN 1674-4799, CN 11-5787/TF, monthly, started in 1994, formerly known as Journal of University of Science and Technology Beijing) is an international journal devoted to publishing original research articles (and occasional invited reviews) on all aspects of minerals processing, physical metallurgy, process metallurgy, and ...
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2019-10-16 Africa has the second largest ultimately recoverable resources (URR) of gigaton (Gt) iron (Fe) ore in the world. South Africa is among the countries in the world with high-quality iron ore deposits. The most significant sources of Fe ore in the African continent are hosted by the banded iron ore formation of Precambrian age with high-quality hematite (Fe2O3) bodies.
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