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Arsenic removal from copper–silver ore by

01.03.2014  An investigation has been carried out for arsenic removal from a silver–copper ore. The copper ore was roasted in air, in nitrogen atmosphere and in vacuum at high temperature. It was found that arsenic was more easily removed in vacuum at lower temperature with shorter time. By suitably adjusting the main reaction conditions, almost 98.97% arsenic could be removed, while most of the

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Arsenic removal from copper ores and

01.09.2009  Our findings show that complete removal of arsenic from enargite ore, Cu-concentrates containing enargite, and blends of the two materials can be achieved within 3–6 h at 80 °C under normal atmospheric pressure. The results also indicate that under high stirring rates, complete arsenic removal can be achieved for slurry or pulp densities as high as 1000 g/L.

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Arsenic Removal from Arsenopyrite-Bearing Iron Ore and ...

Arsenic can be removed from arsenic-bearing ore by a roasting or sintering method due to the volatile nature of arsenic and its compounds ; thus, some scholars have explored the appropriate arsenic removal conditions by performing roasting or sintering experiments. Yin et al. and Lu et

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Arsenic Removal from Arsenopyrite-Bearing Iron

The experimental results revealed that the arsenic in arsenopyrite-bearing iron ore can be removed in the form of As2O3(g) in an air or nitrogen atmosphere by a roasting method. The efficiency of arsenic removal through roasting in air was found to be less than that in nitrogen atmosphere. The method of roasting in a reducing atmosphere is feasible for arsenic recovery from dust ash. When the carbon

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US3709680A - Process for removal of arsenic

A process and apparatus for the removal of arsenic values from an ore concentrate includes the steps of leaching the concentrate with a solution which dissolves the arsenic, separating undissolved...

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The Role of Arsenic in the Mining Industry

[8] Arsenic can also be leached out of some metal ores by cyanide or acid rock drainage but can be captured and removed from wastewater before it is released into the environment. [12] Arsenic is also present in coal used to generate electricity. When coal is burned, ash is produced which contains most of the naturally occurring arsenic. More than 99% of the ash is collected and is either sent to specially-

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Removing Arsenic From Water With an Original

Arsenic contamination of drinking water is a serious water quality problem in many parts of the world. In this study, a low-cost manganese oxide ore from Vietnam (Vietnamese manganese oxide (VMO)) was firstly evaluated for its performance in arsenate (As(V)) removal from water. This material contain

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Arsenic Removal from Arsenopyrite-Bearing Iron Ore and ...

Arsenic can be removed from arsenic-bearing ore by a roasting or sintering method due to the volatile nature of arsenic and its compounds [12]; thus, some scholars have explored the appropriate arsenic removal conditions by performing roasting or sintering experiments. Yin et al. and Lu et al. studied arsenic removal from copper–silver ore using a roasting method [13,14], and the impact of ...

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US3911078A - Method for removing arsenic and

Method for removing essentially all of the chemically bonded arsenic and antimony from copper sulfide ores. The arsenic and antimony are selectively leached out using Na2S in a basic solution. The resulting Na3AsS4 and Na3SbS4 are converted to the sulfides or to ferric arsenate and ferric antimonate for safe disposal. Sodium and sulfur values are recovered for recycling in the process.

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Study on Removal Arsenic from Iron Ore with

Lu et al. investigated arsenic removal from arsenic-bearing iron ore during the sintering process [15, 16]. The effects of temperature, bed depth, gas pressure, and coal ratio on arsenic removal ...

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Removal of arsenic from waste water -

A pressing problem of mining and ore industry is the removal of arsenic from waste water by precipitating it using iron hydroxide or reduction by Na 2 S, K 2 S, FeS 2.. The sedimentation process occurs when a ferrous salt, such as FeCl 3, forms a soft amorphous sediment Fe(OH) 3 in alkaline environment, which has larger active area. As the substance precipitates, it adsorbs and carries away ...

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PROCESS FOR REMOVAL OF ARSENIC FROM

A process for the removal of arsenic from sulfo-ore concentrates containing the same which comprises the steps of 2. A process according to claim 1 wherein said leaching solution is a hot caustic solution. 3. A process according to claim 1 wherein said leaching solution is a hot solution of sodium sulfide containing from about 100 to about 600 grams per liter of sodium sulfide. 4. A process ...

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Arsenic Mining Processing Equipment Flow

Most arsenic is obtained not from an ore mineral of arsenic, but as a by-product in the treatment of gold, silver, copper, and other metal ores. Environmental laws require that arsenic be removed from ores, so that it does not enter the environment in effluent gases, fluids, or solids.

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Arsenic removal from water using a modified

(2011). Arsenic removal from water using a modified rutile ore and the preliminary mechanisms. Desalination and Water Treatment: Vol. 32, No. 1-3, pp. 445-452.

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Removing Arsenic From Water With an Original

Arsenic contamination of drinking water is a serious water quality problem in many parts of the world. In this study, a low-cost manganese oxide ore from Vietnam (Vietnamese manganese oxide (VMO)) was firstly evaluated for its performance in arsenate (As(V)) removal from water. This material contain

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The Role of Arsenic in the Mining Industry

arsenopyrite, the most abundant ore mineral of arsenic. However, arsenic is not recovered from these sources but is rather disposed of in an environmentally safe manner. Arsenic has been commercially recovered from realgar and orpiment in China, Peru, and the Philippines, and from copper-gold ores in Chile. Arsenic also may be recovered from enargite, a copper mineral. Global resources of ...

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How to Remove Arsenic, Antimony Bismuth

Table of ContentsRoasting of Copper-OresSmelting Calcined OresCalcining Coarse MetalSmelting Calcined Coarse MetalRoasting White Metal to Blister-CopperRefining Blister-CopperBessemerizing Copper RegulusPyritic SmeltingElimination by Wet Processes of ExtractionAtmospheric Oxidation Without BurningBurning and Subsequent Washing of Cupreous Iron PyritesExtraction of Copper from

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Removal of arsenic from waste water -

A pressing problem of mining and ore industry is the removal of arsenic from waste water by precipitating it using iron hydroxide or reduction by Na 2 S, K 2 S, FeS 2.. The sedimentation process occurs when a ferrous salt, such as FeCl 3, forms a soft

More

Fundamental studies on arsenic removal from

The arsenic content of copper ore for smelting is increasing in recent years. But high arsenic-containing copper ore or concentrate has disadvantage environmentally and economically because arsenic is harmful and should be treated decently in metallurgical process. In this paper, the fundamental experiment for the elimination of arsenic from copper concentrate by volatilization process as ...

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Study on Removal Arsenic from Iron Ore with

The physicochemical properties of iron ore with arsenic in South of China was analyzed by chemical analysis, XRD, high power microscope. The effects of various factors on arsenic removal in sintering process were studied and the optimal technique parameters were obtained. The results show that the mineral of iron ore with arsenic in South of China mainly is composed of magnetite and gangue, in ...

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Arsenic removal from water using a modified

(2011). Arsenic removal from water using a modified rutile ore and the preliminary mechanisms. Desalination and Water Treatment: Vol. 32, No. 1-3, pp. 445-452.

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Arsenic Removal in Low-Grade Fluorite by Using Mineral ...

Arsenic Removal in Low-Grade Fluorite by Using Mineral Processing Techniques Toyohisa FUJITA1, Gjergj DODBIBA1, Hyun Seo PARK1, Koji HIGASHINO1 and Seiji MATSUO1 1Department of Systems Innovation, Graduate School of Engineering, The University of Tokyo 7-3-1, Hongo, Bunkhyo-ku, Tokyo 113-8656, Japan Abstract A high grade of fluorite ore is necessary to produce hydrogen

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Removing Arsenic From Water With an Original

Arsenic contamination of drinking water is a serious water quality problem in many parts of the world. In this study, a low-cost manganese oxide ore from Vietnam (Vietnamese manganese oxide (VMO)) was firstly evaluated for its performance in arsenate (As(V)) removal from water. This material contain

More

Arsenic Mining Processing Equipment Flow

Most arsenic is obtained not from an ore mineral of arsenic, but as a by-product in the treatment of gold, silver, copper, and other metal ores. Environmental laws require that arsenic be removed from ores, so that it does not enter the environment in effluent gases, fluids, or solids.

More

The Role of Arsenic in the Mining Industry

arsenopyrite, the most abundant ore mineral of arsenic. However, arsenic is not recovered from these sources but is rather disposed of in an environmentally safe manner. Arsenic has been commercially recovered from realgar and orpiment in China, Peru, and the Philippines, and from copper-gold ores in Chile. Arsenic also may be recovered from enargite, a copper mineral. Global resources of ...

More

Adsorption of arsenic and heavy metals from

Minh N.T., 2010. Research on adsorbent based on natural mineral materials: basalt, laterite, clay to remove heavy metal and arsenic from contaminated wastewater. KC-02.25/06-10. Mohapatra D., Mishra D., Park K.H., 2008. A laboratory scale study on arsenic (V) removal from aqueous medium using calcined bauxite ore. Journal of Environmental ...

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The Economics Of Removing Arsenic From Copper Concentrates ...

The Economics Of Removing Arsenic From Copper Concentrates Using The Toowong Process ... US$5.30/lb As removed for larger plants and US$7.80 /lb As removed for smaller plants Concentrate Treated 2.5% As 40,000 tpa 200,000 tpa 400,000 tpa Opex - US$/lb As removed low * $4.59 $3.70 $3.58 Opex - US$/lb As removed high $5.49 $4.57 $4.48 * low reagent costs - lime, caustic and ferric

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Arsenic Removal in Low-Grade Fluorite by Using Mineral ...

trated fluorite ore, imported from Mexico, was upgraded by removing arsenic, which is difficult to be decreased by conventional method. The micro-bubble flotation, liquid-liquid separation and mechano-chemical leaching of fluorite ore were carried out to investigate the removal of arsenic from the low-grade fluorite. Experimental results showed that the arsenic concentration was reduced

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Fundamental studies on arsenic removal from

The arsenic content of copper ore for smelting is increasing in recent years. But high arsenic-containing copper ore or concentrate has disadvantage environmentally and economically because arsenic is harmful and should be treated decently in metallurgical process. In this paper, the fundamental experiment for the elimination of arsenic from copper concentrate by volatilization process as sulfide

More

Study on Removal Arsenic from Iron Ore with

The physicochemical properties of iron ore with arsenic in South of China was analyzed by chemical analysis, XRD, high power microscope. The effects of various factors on arsenic removal in sintering process were studied and the optimal technique parameters were obtained. The results show that the mineral of iron ore with arsenic in South of China mainly is composed of magnetite and gangue, in ...

More

Study on Removal Arsenic from Iron Ore with

The physicochemical properties of iron ore with arsenic in South of China was analyzed by chemical analysis, XRD, high power microscope. The effects of various factors on arsenic removal in sintering process were studied and the optimal technique parameters were obtained. The results show that the mineral of iron ore with arsenic in South of China mainly is composed of magnetite and gangue, in ...

More

Arsenic removal from water using a modified

(2011). Arsenic removal from water using a modified rutile ore and the preliminary mechanisms. Desalination and Water Treatment: Vol. 32, No. 1-3, pp. 445-452.

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Preliminary mechanisms for arsenic removal

The removal efficiency of As(III) and As(V) by adsorption onto the ore was up to 9557% and 9289%, respectively, under the conditions of ratio of solution/ore of 500, a reaction time of 1 hour, and As concentration of 0200 mg L −1. The adsorption process followed the second-order rate law. Instrumental analysis indicated that efficient arsenic removal onto natural ferruginous manganese ...

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Removal of Arsenic from Crude Tin by Vacuum Distillation

Arsenic is widely present in the process of ore-dressing, tailings recovery and smelting, which is poisonous and harmful. Current tech-nologies which can treat tin ore or crude tin have not achieved satisfactory economic and environmental effects. In particular, the existing pro-cesses have poor effects on arsenic removal from raw materials. This paper adopted vacuum distillation to deal with crude tin.

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Arsenic adsorption on natural minerals

Natural minerals are used to remove Arsenic (As) from aqueous solution in this study. The influence of suspension pH, ... A low cost ferruginose manganese ore (FMO) has been studied for the removal of As (V) from ground water. Once adsorbed, As (V) does not get desorbed even on varying the pH in the range of 2-8. Traces of As (V) can be selectively removed from the drinking water by natural ...

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Arsenic — a Review. Part II: Oxidation of Arsenic

Arsenic can be removed from waters by coprecipitation with Fe(OH) 3, MnO 2 or during water softening. Fixed‐bed filters have successfully been applied for the removal of arsenic.The effectiveness of arsenic removal was tested in the presence of adsorbents such as FeOOH, activated alumina, ferruginous manganese ore, granular activated carbon, or natural zeolites. Other removal technologies ...

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Arsenic Minerals Flotation - franzburger

Selective removal of arsenic from copper. To explore and develop improved electrochemically-controlled flotation techniques to separate arsenic bearing copper sulphides from copper and iron bearing sulphides in complex copper ores there is currently no widely accepted industrial process that spe... Details

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