arsenic ore mining

Arsenic in the mining industry Atmospheric arsenic emissions from copper smelting represent the largest contribution of arsenic from the mining and metals industry by far and have been the focus of pollution control technologies and increasingly stringent regulations 8 Arsenic can also be leached out of some metal ores by cyanide or acid rock drainage

Relation to Mining Arsenic metal very rarely occurs in its pure form in nature The most common arsenic mineral is arsenopyrite a compound of iron arsenic and sulfur Several other lesscommon minerals contain arsenic including orpiment realgar and enargite which are arsenic sulfides

Arsenic occurs in elemental form but is much more common in minerals Most of the worlds arsenic is mined in China with most of the remainder coming from Chile Mexico the Philippines and Russia The following steps will describe the more common methods of obtaining this highly poisonous element

The Putnam County Arsenic Mine is near Lake Carmel New York Historically the site has been associated with the Hudson Highlands Mining District which

Leaching of HighGrade Ore The effects of NaOH concentration oxygen pressure temperature reaction time and percent solids on extraction of arsenic from ore A are given in table 4 The ore contains 61 pct arsenopyrite and the stoichiometric NaOH for complete extraction of arsenic is 188 mol of NaOH per 100 g ore according to equation 1

Arsenic ores are divided into several known types according to the commercial classification of ore deposits arsenic arsenopyrite and realgarorpiment goldarsenic complexmetalarsenic copperarsenic arseniccobalt and arsenictin ores

Concentrations of arsenic toxic to humans and aquatic life have resulted from mining activities in some instances Hence regulatory agencies in the US are requiring gold mining companies to comply with very restrictive arsenic standards

Most arsenic is obtained not from an ore mineral of arsenic but as a byproduct 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

The arsenic sublimates out of the mineral as a gas and it is condensed into solid pure arsenic Obtain arsenic as a byproduct of mining and refining other metals Recover the flue dusts produced from copper nickel and tin which are high in the arsenides of these metals

The Ottery arsenic refinery is the oldest principal ore refinery in Australia Arsenic mining ceased in Australia in 1952 and in New South Wales in 1936 as the Ottery Mine ended production

Removal of arsenic antimony and bismuth from copper may take place in the smelting operations by scorification volatilization or under special treatment by processes of concentration Owing to the great variety of materials that are treated in economical metallurgy it is rarely possible to obtain exact weights from any particular operation

The former mine that is part of the arsenic mine site was operated from the mid1800s through about 1918 to extract arsenic ore for manufacturing products including pesticides pharmaceuticals and

Most arsenic ore deposits belong to the endogenic series and the plutonogenic and volcanogenic classes of the hydrothermal group Arsenic compounds usually occur in association with nonferrous and noble metals copper zinc lead gold silver and so on

Arsenic occurs in pure form only in small deposits It occurs in many minerals and usually is obtained as a byproduct from the mining processing and refining of other minerals Common arsenicbearing minerals include arsenopyrite conichalcite enargite lollingite iron arsenide olivenite and orpiment

Concentrations of arsenic toxic to humans and aquatic life have resulted from mining activities in some instances Hence regulatory agencies in the US are requiring gold mining companies to comply with very restrictive arsenic standards

Higharsenic copper concentrates These products may contain up to 30 Cu and deleterious levels of As 517 bismuth and antimony In the PTPA plant dust is acid leached to produce copper pregnant leach solution which is pumped 7km to Codelco’s Chuquicamata mine where it is used to produce copper cathodes

Mining Companies Statistics Users Mineral Museums Mineral Shows Events The Mindat Directory Device Settings Classification of Arsenic oreHide Rock Ore Arsenic ore Mineralogy of Arsenic oreHide Nonessential minerals these minerals are common sometimes major components but are not always present

Oct 21 2014 · A new report by GFMS a metals and mining consultancy has taken the route of blending material from different portions of the ore deposit to dilute arsenic content Given the amounts of

Copper Ore contains silica associated with high exposure to respirable crystalline silica Other elements are arsenic and uranium Iron ore Typically benign but when processing release dusts containing other substances ie silica mineral fibres Manganese During mining production of alloys foundry

Oct 01 2009 · Arsenic occurs naturally in the earth’s crust and much of its dispersion in the environment stems from mining and commercial uses In industry arsenic is a byproduct of the smelting process separation of metal from rock for many metal ores such as cobalt gold lead nickel and zinc

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the same action effects the elimination of the arsenic and antimony associated with gold antimony gold ore refinery ore mining wet weak magnetic Pacific Iron Ore – Properties – FAQ Hematite is the mineral generally associated with vast iron ore mine

Arsenopyrite is an iron arsenic sulfide mineral with a chemical composition of FeAsS It is the most abundant arsenic mineral and the primary ore of arsenic metal In addition to being found in deposits that are large enough to be minable arsenopyrite is widely distributed

Arsenic in bituminous coal occurs primarily in pyrite and to a lesser extent in organic portions of the coal A small fraction of this arsenic is emitted during coal combustion This Fact Sheet provides information on the arsenic content of US coals how arsenic occurs and its behavior during mining coal preparation

arsenicbearing ores in a broad context and related this to the specific operations at the Giant mine Yellowknife NWT Can ada which roasted arsenopyrite FeAsSrich gold ore concentrates during 50 years of operations A large portion of the As was collected and stored in underground vaults as As 2

phase of a mining project ie exploration process development mine operation and mine closure Rejection of arsenic minerals during the early stages of exploration mining and beneficiation During the exploration stage focus is usually placed on the mineralogy and ore texture of the pay metals for obvious reasons For arsenic containing

The average arsenic content of waste moved in mining is estimated as the average of the values for ore and unmineralized material or 81 ppm for arsenical districts and 7 ppm for nonarsenical districts An estimated 40 of the arsenic in copper or copper–lead–zinc ore is left in the concentrator tailings

Nov 18 2010 · Arsenic in Surface Soils Affected by Mining and Metallurgical Processing in K Mitrovica Region Kosovo Trajce Stafilov 1 Milihate Aliu 2 and Robert Sajn 3 1 Institute of Chemistry Faculty of Science Sts

and manganese mining areas and are heavily used for iron and manganese ore transport This region generates 2530 million tons of mining rejects per year The iron ore of MandoviZuari catchments area has approximately 5004 µgg of arsenic and partial dissolution of the mining rejects could enrich the dissolved arsenic in estuaries The