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CN104232924A - Copper extraction and iron removal method ...

The invention discloses a copper extraction and iron removal method of copper ore acid leaching liquid. The method comprises the following steps: breaking secondary copper oxide ore and secondary copper sulfate ore, mixing and performing wet-process dump leaching; using dilute sulphuric acid as a leaching agent for conducting spraying and leaching to obtain faintly acid leaching liquid ...

How to Use Bleach on Gold Ore to Remove Gold | Sciencing

Pour the acid-and-bleach mixture into the plastic bowl with the ore grains and stir. Allow four hours for the gold to dissolve, stirring every 20 minutes. The chlorine reacts with the gold inside the ore to form gold chloride. Filter the ore and bleach solution …

LEACHING OF METALS INTO GROUNDWATER …

sites. Contaminants such as arsenic, iron, manganese, lead, and cadmium can dissolve from soil and waste material into groundwater in a process known as leaching. The dissolution of these metals is based on the chemistry of the water and the soil. Factors that affect metal mobility

Removal of Sulfur From Iron Ore with Physical and Chemical ...

In the first part, iron ore was heated to a high temperature by microwave to decompose pyritic sulfur, which is one of the sulfur species in the ore (FeS 2), into sulfur dioxide (SO 2), ferrous sulfate (FeSO 4), and pyrrhotite (FeS). Then, the ore obtained by this process was extracted (leaching) with H2SO 4/H 2O2 solution at a determined ...

MULTISTAGE DILUTE ACID LEACHING OF A MEDIUM GRADE …

final stage water leaching to clean the iron ore in the H 2 O-HCl-H 2 O leaching sequence. The three stage leaching procedure was repeated but in the sequence HCl-H 2 O-H 2 O. The elemental analysis of final residue of the two three stage routes that gave the highest percentage dissolution of …

REMOVAL OF PHOSPHORUS THROUGH ROASTING OF …

REMOVAL OF PHOSPHORUS THROUGH ROASTING OF OOLITIC IRON ORE WITH ALKALINE EARTH ADDITIVES . Roasting, separation and leaching procedures . The preliminary orientation tests have shown that during leaching with 0.96 M sulfuric acid at boiling temperature for one hour, about 33 % of the phosphorus can be removed.

Aluminum Mineral Processing and Metallurgy: Iron-Rich ...

The lateritic bauxite hydrochloric acid leaching process showed that when the ore granularity was less than 55 μm, the liquid/solid ratio (L/S ratio) was 100:7, the leaching temperature was 373–383 K, the leaching time was 120 min and the HCl concentration was 10%, both the leaching rates of Al and Fe were over 95% . But the hydrochloric ...

HIGH PRESSURE SULPHURIC ACID LEACHING OF LATERITIC …

Abstract: In this study, the effects of acid/ore ratio (0.1-0.6 g H 2 SO 4 /g dry ore), leaching temperature (200–240 °C) and leaching time (30–120 minutes) on the high pressure sulphuric acid leaching of a lateritic nickel ore sample having 1.37% Ni, 0.076% Co and 47.72% Fe 2 O 3 were investigated. The

Iron Ore Mining In China Leaching Process - Tenic Mining ...

The cyanide leaching process of gold ore gold resources. Nov 09 2020 Taking a carbon-arsenic low-grade gold oxide ore as an example the leaching test was carried out when the grinding fineness was -0.074mm the content was 95 the slurry concentration was 33 and the pH was 12. The leaching time was 24 hours 36 hours and 48 hours.

Leaching of limonitic laterite ore by acidic thiosulfate ...

The laterite ore used in this study was obtained from Indonesia. The sample is characterized as high iron and cobalt content, as well as low nickel content ().Mineral composition obtained by XRD indicates that the sample is composed of goethite (FeOOH) and gibbsite (Al 2 O 3 ·3H 2 O), and the sample is a typical limonitic laterite ore. The occurring relationship between Fe, Ni, Mn, …

Gold extraction - Wikipedia

Gold extraction refers to the processes required to extract gold from its ores.This may require a combination of comminution, mineral processing, hydrometallurgical, and pyrometallurgical processes to be performed on the ore.. Gold mining from alluvium ores was once achieved by techniques associated with placer mining such as simple gold panning and sluicing, resulting in direct recovery of ...

Model for the Calculation of the Concentration of ...

other micro organisms. Oxygen (atmospheric) was assumed to have affected the leaching process at its initial stage. Weights input ranging from 6-42g of iron oxide ore was used. The leaching process conditions used include: initial pH6.8, leaching time; 30 minutes, leaching

Model for predicting the concentration of phosphorus ...

iron oxide ore through a process associated with hydrometallurgy. Phosphorus was removed at a temperature of 250C and initial solution pH 2.5, leading to the dissolution of the phosphorus oxide formed. This involved using acid leaching process to remove phosphorus from the iron oxide ore in readiness for steel making process.

Direct Biohydrometallurgical Extraction of Iron from Ore ...

A completely novel approach to iron extraction was investigated, based on reductive leaching of iron by anaerobic bacteria. Microorganisms were collected from an anaerobic bog where natural seepage of dissolved iron was observed. This mixed culture was used to reduce insoluble iron in a magnetite ore to the soluble ferrous (Fe {sup +2}) state.

US2916357A - Nitric acid leaching process - Google Patents

US2916357A US694933A US69493357A US2916357A US 2916357 A US2916357 A US 2916357A US 694933 A US694933 A US 694933A US 69493357 A US69493357 A US 69493357A US 2916357 A US2916357 A US 2916357A Authority US United States Prior art keywords iron solution parts nitric acid dissolved Prior art date Legal status (The legal status is an assumption and is not a legal …

Processes - extraction, mining, smelting, refining ...

Open-pit – 90% of ore is mined using the open pit method. Ores near the surface can be quarried after removal of the surface layers. The ore An ore is a rock that contains enough metal to make it worthwhile extracting. Grinding The ore is crushed, then ground into powder. Concentrating The ore is enriched using a process called froth flotation.

Removal of phosphorus from iron ores by chemical leaching ...

Alkali-leaching and acid-leaching were proposed for the dephosphorization of Changde iron ore, which contains an average of 1.12% for phosphorus content. Sodium hydroxide, sulfuriced, hydrochloric and nitric acids were used for the preparation of leach solutions. The results show that phosphorus occurring as apatite phase could be removed by alkali-leaching, but those occurring in the iron ...

An Innovative Technique for Comprehensive Utilization of ...

high aluminum iron ore (33.43% Fetotal and 19.09% Al2O3). The main steps in the proposed process included pre-reducing high alumina iron ore and subsequent smelting to produce pig iron and rich-alumina slag, followed by alkaline leaching of the slag to obtain sodium aluminate solution and a …

MINERAL PRODUCT PRICING STUDY

Iron oxide ores usually follow a processing path where the copper is leached from the surrounding rock. The ore is first heaped into piles in special leaching areas, and a sulphuric acid solution is sprayed over the heap to gradually dissolve the copper, separating it from the surrounding gangue.

Uranium Mining and Extraction from Ore

Uranium leaching is the process by which the uranium is extracted from the raw ore by reacting the material with acid or base. Fig. 2 shows a general process flow for the uranium extraction process. Prior to the leaching process, the ore is often given preliminary …

MULTISTAGE DILUTE ACID LEACHING OF A MEDIUM GRADE IRON ORE …

In the first stage, the sample was leached with water, then with 0.875M hydrochloric acid and the final stage water leaching to clean the iron ore in the H 2 O-HCl-H 2 O leaching sequence. The three stage leaching procedure was repeated but in the sequence HCl-H 2 O-H 2 O.

Science Break: Metal Leaching | Mar. 2017 | CSEG RECORDER

The term metal (or metallurgical) leaching refers to the processes involved in separating useful metals from non-valuable ore constituents. The science behind these processes, while not a very glamourous topic, is important: beyond the obvious practical necessity of extracting the metals, leaching methods historically have left behind toxic waste products, so modern improvements represent ...

4 Factors Influence the Effect of Heap Leaching Method

1. Influence of the Ore. There are often other kinds of mineral components in the gold ore, such as iron ore, lead ore, antimony ore and so on.Among them, the metal group will have a certain effect on the cyanide leaching,like slowing down or accelerating the dissolution of gold.

(PDF) Iron removal from a kaolinitic clay by leaching to ...

A study of main variables of the leaching process in different ranges was realized: time (0 to 120 min), temperature (25 to 100 °C) and acid concentration (0.01 to 0.5 M). ... 77% of iron-ore was ...

Metals | Free Full-Text | An Innovative Technique for ...

In this study, a novel process was established for extraction of Fe and Al from a complex high aluminum iron ore (33.43% Fetotal and 19.09% Al2O3). The main steps in the proposed process included pre-reducing high alumina iron ore and subsequent smelting to produce pig iron and rich-alumina slag, followed by alkaline leaching of the slag to obtain sodium aluminate solution and a clean slag.

DEPHOSPHORIZATION OF OOLITIC GOETHITE IRON ORE BY …

* Technical contribution to the 44th Ironmaking and Raw Materials Seminar, 15rd Brazilian Symposium on Iron Ore and 2nd Brazilian Symposium on Agglomeration of Iron Ore, September 15th to 18th, 2014, Belo Horizonte, MG, Brazil. DEPHOSPHORIZATION OF OOLITIC GOETHITE IRON ORE . BY ROASTING-LEACHING PROCESS

Silica and Iron Recovery from a Residue of Iron Ore Flotation

A study of silica and iron recovery from the iron ore concentration tailing is presented. The residue is composed of 40.1% Fe, 33.4% SiO 2, 8.31% Al 2 O 3, 0.08% P, and 0.34% MnO. The developed process of silica and iron recovery consisted of size classification, magnetic separation, and removal of impurities by leaching. A concentration of SiO 2

Removal of phosphorus from iron ores by chemical leaching ...

12%Alkali-leaching and acid-leaching were proposed for the dephosphorization of Changde iron ore, which contains an average of 1.12% for phosphorus content. Sodium hydroxide, sulfuriced, hydrochloric and nitric acids were used for the preparation of leach solutions. The results show that phosphorus occurring as apatite phase could be removed by alkali-leaching, but those occurring in the iron ...

Dephosphorization Treatment of High Phosphorus Oolitic ...

The dephosphorization of high phosphorus iron ore has been researched in many countries, such as physical separation, 6,7,8,9,10) bio-leaching, 11,12) flotation, 13,14) hydrometallurgical process. 15,16) But the oolitic structure of the ore prevents the effective use of physical concentration and flotation separation, and necessitates the use ...

Upgrading Low-Grade Iron Ore through Gangue Removal by a ...

After the H 2 O leaching process, the Fe form is found to be in the amorphous form for all samples, except for the iron ore sample of the highest Fe content. The reason for this is thought to be due to the large amount of unreacted Fe 2 O 3 with NaOH during the roasting process.

iron removal heap copper leaching

The second process, heap and dump leaching of low-grade oxide and/or sulphide ore followed by precipitation of low quality copper from the leach solution on scrap iron, was practiced on oxide ore that was too low-grade for vat leaching, or low grade sulphide ore that had to be mined in

Recovery of iron from cyanide tailings with reduction ...

Cyanide tailing is a kind of solid waste produced in the process of gold extraction from gold ore. In this paper, recovery of iron from cyanide tailings was studied with reduction roasting-water leaching process followed by magnetic separation. After analysis of chemical composition and crystalline …

Evaluation of Sulphur Removal Based on Its As-Beneficiated ...

Chemical Leaching Process . The dried scrubbed iron ore was further pulverized and sieved to obtain a particle size of 10microns. Analar grade of acetic acid solutions of different moles of 0.25M, 0.5M, 0.75M, 1.00M and 1.25M were prepared. 50grams of constant particle size of 10 microns of scrubbed iron ore …