Concentration of Ore: Definition, Classification, Methods - Embibe
Oxidized ore: They contain oxides or oxysalts such as carbonates, phosphate and silicate of metal. Examples: Oxide ores (Fe 2 O 3, Al 2 O 3 etc.), Carbonate ores (CaCO 3, ZnCO 3 etc.). ... Leaching:Leaching is used when the ore is soluble in a solvent. The powdered ore is dissolved in a chemical, usually a strong solution of NaOH.
اقرأ أكثرExtraction of Nickel from Magnesia–Nickel Silicate Ore
In this study, magnesia–nickel silicate ore was investigated, which contained 0.83% Ni and antigorite, chlorite, magnetite (Fe3O4), quartz, and mica as the main minerals. ... When MgO ≤ 5% and Ni ≥ 1% in the ore, the Ni–Co leaching rate is high and H 2 SO 4 consumption and Ni production cost per unit are low. In recent years, most of ...
اقرأ أكثرEP1370699A1 - A method for the precipitation of silica in ... - Google
The invention relates to a method for the leaching of oxidized ores and in particular zinc ores. The ore, wherein the valuable metals are at least partially in silicate form, are routed to an acidic leaching stage in conditions where the silicate decomposes and the valuable metal ion comes into the solution. During leaching the silicate ion first dissolves, but simultaneously …
اقرأ أكثرSYSTEM AND METHOD FOR PREPARING ULTRAFINE SILICA BY LEACHING SILICATE …
1. A system for preparing ultrafine silica by leaching a silicate ore using hydrogen chloride gas, comprising a raw ore feeding apparatus, an ejector, a stirred tank, and a solid-liquid separation apparatus, wherein a liquid inlet, a liquid outlet, and a gas inlet are arranged on the ejector; a circulated material outlet of the stirred tank is connected with the liquid inlet of the ejector ...
اقرأ أكثرApplication of microwave irradiation to quick leach of zinc silicate ore
The samples used in this group of experiments were prepared by mixing 20 g of zinc silicate ore with 12.6 g of diluted sulfuric acid ( 88.37% H 2 SO 4 by weight). The samples were aged for 3 h and then subjected to microwave irradiation for different times. The experimental results are shown in Fig. 4, Fig. 5.
اقرأ أكثرSulfuric acid leaching of zinc silicate ore under pressure
The ore (− 98 + 74 μm) was leached in solution containing 0.46 mol/L sulfuric acid for 120 min at 140 °C at different L/S ratios ranging from 6 to 10. The obtained data plotted in Fig. 7 show that L:S ratio affected significantly the leaching recovery of iron and silica but zinc slightly.
اقرأ أكثرPressure leaching of zinc silicate ore in sulfuric acid medium
Sulfuric acid pressure leaching of zinc silicate ore was carried out to assess the effect of particle size, sulfuric acid concentration, pressure, reaction time and temperature on the extraction of zinc and the dissolution of silica. Under the optimum conditions employed, up to 99.25% of zinc extraction and 0.20% silica dissolution are obtained.
اقرأ أكثر(PDF) Oxidative fusion and alkaline leaching for manganese extraction ...
Optimum parameters for Mn recovery (94 %) obtained were manganese silicate ore/NaOH ratio 1, fusion temperature 500 °C, fusion time 1 h, leaching pulp density 7 %, and leaching time 5 min. Effect ...
اقرأ أكثرCopper extraction - Wikipedia
All primary sulfide ores of copper sulfides, and most concentrates of secondary copper sulfides (being chalcocite), are subjected to smelting.Some vat leach or pressure leach processes exist to solubilise chalcocite concentrates and produce copper cathode from the resulting leachate solution, but this is a minor part of the market.. Carbonate concentrates are a relatively minor …
اقرأ أكثرBioleaching of silicate manganese ores: Geomicrobiology …
Improvement of leaching conditions increased this to 20% within 6 h. Besides the manganese in the ore, 45% of the aluminum and 8% of the iron were dissolved in this time interval. This demonstrates that bioleaching of manganese from silicate ore is feasible, thus opening up new possibilities for the mineral processing industry.
اقرأ أكثرMethod for the precipation of silica in connection with zinc ore leaching
This shows a method for the treatment of a silicate-containing ore, but obviously it can be adapted for the leaching of other silicate-containing materials. The ore 1 to be treated is first taken to a neutral leaching stage 2, where the ore is leached into a dilute sulfuric acid-zinc sulfate solution. Leaching occurs in atmospheric conditions.
اقرأ أكثرLeaching Process: Definition, Explanation - Collegedunia
The process of Leaching is used to concentrate the ore. The ore of the metal is made to react with a suitable chemical reagent leading to the dissolution of only the metal, leaving behind the impurities which remain undissolved. The solution so obtained is a compound of the metal that can be further processed to extract the pure metal.
اقرأ أكثرDissolution and Removal of Silicates in Acid Leaching …
Abstract Soluble silica generated from acid leaching process is very difficult to filter and deceases the purity of products, and thus becomes one of hot issues in hydrometallurgy. This paper...
اقرأ أكثرMinerals | Free Full-Text | Bioleaching of Gold from Silicate Ore by ...
The aims of this work were to study the gold leaching by the isolated bacteria from silicate ore. Three strains were isolated and identified as Macrococcus caseolyticus, Acinetobacter calcoaceticus, and Bacillus sp. MBEA40. However, only M. caseolyticus and A. calcoaceticus were capable of gold bioleaching. In order to examine only the effect of …
اقرأ أكثرEffective separation and recovery of iron and chromium from …
NAPL residue was produced in the laboratory, and typical limonitic laterite ores from Indonesia were used as raw material. The leaching conditions were as follows: temperature of 210 °C, leaching time of 60 min, nitric acid concentration of 220 g/L, stirring rate of 500 rpm and liquid-to-solid ratio of 2.5/1 mL/g.The chemical compositions of the leach residue are …
اقرأ أكثرLateritic nickel ore deposits - Wikipedia
Limonite type laterites (or oxide type) are highly enriched in iron due to very strong leaching of magnesium and silica. They consist largely of goethite and contain 1-2% nickel incorporated in goethite. Absence of the limonite zone in the ore deposits is due to erosion. Silicate type (or saprolite type) nickel ore formed beneath the limonite ...
اقرأ أكثرINVESTIGATION OF SELECTIVE LEACHING PROCESS …
the ore reduced by CO was about 70 % Ni and from the ore reduced by H2 was 60 % Ni. Addition of 2 % CaCl2 during the reduction by H2 led to the increase of the nickel leaching degree from 60 to 64.5 % Ni. This paper presents the results of research on the high-temperature sulphuric acid pressure leaching of the nickel silicate ore "Rudinci".
اقرأ أكثرCaF2-Enhanced HCI Leaching of a Manganese …
Previous investigators have proposed a combination pyrometallurgical and hydro- metallurgical process to treat the manganese silicate ores. The process consisted of arc melting the ore at 1,550" C and then rapidly cooling the melt by quenching it in water. The resulting amorphous product was acid leached for manganese extraction (3).
اقرأ أكثرCaF2-Enhanced HCI Leaching of a Manganese-Bearing …
of CaF,-enhanced HCl leaching of a manganese silicate ore. PROCEDURES AND EQUIPMENT The ore used in this study was from the Sunnyside Gold Corp., located in the Silverton Mining District of San Juan County, CO. The elements of primaiy interest contained in the ore were, in percent, 35.1 Mn, 23.4 Si, 1.8 Ca, and 1.4 Fe.
اقرأ أكثرThe Extraction of Silica from Nickel Laterite Ore by Alkaline ...
Nickel laterite ore [1, 2] is a surface weathering crust deposit formed by leaching and deposition of nickel sulfide ore [3,4,5,6,7,8] after weathering.The nickel storage capacity of nickel laterite ore accounts for about 70% of the world's terrestrial nickel resources. The proven nickel laterite ore resources are mainly distributed in the Tropic of Cancer tropical areas such …
اقرأ أكثرHCl Hydrochloric Leaching of Manganese Silicate Ore
The manganese silicate ore was leached countercurrently in a procedure schematically illustrated in figure 4. In the first stage, a 35-pct …
اقرأ أكثرCopper Recovery from Silicate-Containing Low-Grade Copper …
Copper Recovery from Silicate-Containing Low-Grade Copper Ore Using Flotation Followed by High-Pressure Oxidative Leaching Vol. 64, No. 1 (21) 5 acid (H 2 SO 4) were used in this study. The silicate- containing low-grade copper ore samples were first introduced into the flotation cell with 500 mL water under constant stripping (1000 rpm) to pre-
اقرأ أكثرWO2002072896A1 - A method for the precipitation of …
The ore, wherein the valuable metals are at least partially in silicate form, are routed to an acidic leaching stage in conditions where the silicate decomposes and the …
اقرأ أكثرSilicate mineral dissolution during heap bioleaching.
Column bioleaching of the complex sulfide ore was carried out at various temperatures (7-50 degrees C) and pH values (1.5-3.0). Column leaching at pH 1.5 and 2.0 resulted in increased acid consumption rates and silicate dissolution such that it became difficult to filter the leach solutions and for the leach liquor to percolate through the column.
اقرأ أكثرSilicate mineral dissolution during heap bioleaching - PubMed
Column bioleaching of the complex sulfide ore was carried out at various temperatures (7-50 degrees C) and pH values (1.5-3.0). Column leaching at pH 1.5 and 2.0 resulted in increased acid consumption rates and silicate dissolution such that it became difficult to filter the leach solutions and for the leach liquor to percolate through the column.
اقرأ أكثرExtraction of Rare-Earth Elements from Silicate-Based Ore …
The effect of temperature on the oxidizing leaching of silicate-based ore was studied from 25 to 90 °C. The results are presented in Figure 8, which shows that the increase in the temperature benefited the rare-earth elements' leaching. Lanthanum, cerium, neodymium, and yttrium extraction slightly increased as a function of the temperature.
اقرأ أكثرHydrometallurgical Processes for the Recovery of Rare Earths, …
paper, the recovery of REEs from alumino-silicate ores, and nickel and cobalt from laterite ores is described. Atmospheric pressure leaching of ores in lixiviant con-taining hydrochloric acid and magnesium chloride followed by separation and purification, and recovery of these metals are presented. Mixed-Chloride Leaching Process for the Recovery
اقرأ أكثرUS4070260A - Process of sulfuric acid leaching silicated …
A process of leaching silicated zinc ores with sulfuric acid in which the ore is reacted at elevated temperature with at least a stoichiometric amount of sulfuric acid, treating products of the reaction with a predetermined quantity of hot water, filtering the zinc sulfate solution from precipitated silica, washing with a further predetermined quantity of hot water (the total amount of hot ...
اقرأ أكثرZinc Silicate and Carbonate Leaching Process - Metso Outotec
Metso Outotec's zinc silicate and carbonate leaching process provides high zinc recovery while still controlling silicon leaching and the removal of silica. After leaching, iron removal and solution purification or zinc solvent extraction steps produce a solution suitable for zinc electrowinning with a final zinc product of SHG ingot. Offers ...
اقرأ أكثرLeaching of a silicate and carbonate copper ore with …
Abstract Leaching of metals with carbon-heterotrophic microorganisms and organic acids as active agents has been performed with Timna copper ore containing 1.1% copper as carbonates and silicate and with some other metal oxides.
اقرأ أكثرdry rock leaching silicates?! - REEF2REEF Saltwater and Reef …
Location. NYC. cperry7467 said: I ended up switching to the BRS pro series and running a single cation bed, anion bed followed by a mixed bed for final polishing. The color change is much more apparent now, zero silicates and no diatoms since I changed over. One of the best changes I've ever made.
اقرأ أكثرRecent Progress in Hydrometallurgical Processing of Nickel Lateritic Ore
The Caron leaching method works with oxide laterites ("limonite") that can tolerate some silicate laterite, but too much silica and Mg reduce Ni recovery. Drying and roasting in a reducing environment are followed by ammonia leaching at low pressure. ... Wang H, Cui J & Hao J, Surfactant-assistant atmospheric acid leaching of laterite ore ...
اقرأ أكثرUS4070260A - Process of sulfuric acid leaching silicated zinc ores ...
A process of leaching silicated zinc ores with sulfuric acid in which the ore is reacted at elevated temperature with at least a stoichiometric amount of sulfuric acid, treating products of the reaction with a predetermined quantity of hot water, filtering the zinc sulfate solution from precipitated silica, washing with a further predetermined quantity of hot water (the total amount …
اقرأ أكثرThe kinetics of zinc silicate leaching in sodium hydroxide
The alkaline leaching kinetics of a zinc silicate ore assaying 34.1% Zn, 11.1% Fe and 22.9% SiO 2 is studied in sodium hydroxide solutions. Speciation diagrams indicate zinc dissolution as [Zn(OH) 4] 2− and SEM analysis showed a progressive reduction in particle size during leaching which supports the shrinking particle model. The process is chemically …
اقرأ أكثرLeaching of a silicate and carbonate copper ore with …
Leaching of metals with carbon-heterotrophic microorganisms and organic acids as active agents has been performed with Timna copper ore containing 1.1% copper as carbonates and silicate and with some other metal oxides.
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