ore processing residues

  • COPR Chromite Ore Processing Residue All Acronyms

    What is the abbreviation for Chromite Ore Processing Residue? What does COPR stand for? COPR abbreviation stands for Chromite Ore Processing Residue.

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  • (PDF) Chromite Ore Processing Residue in Hudson County ...

    PDF | Chromite ore processing residue occurs at over 130 sites in Hudson County, New Jersey. Many of these sites are in urban residential areas. This waste is a result of 70 years of chromate and ...

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  • Chromium Cleanup Partnership

    Chromite ore processing in Hudson County ends. During its lifetime, Hudson County's chrome industry generated approximately 2 million tons of residue, which was later determined to be a hazardous material. 1982 Jersey City and New Jersey Department of Environmental Protection begin identifying chromite ore processing residue sites. 198289

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  • Tailings Wikipedia

    Tailings are the materials left over after the process of separating the valuable fraction from the uneconomic fraction of an ore. Tailings are distinct from overburden, which is the waste rock or other material that overlies an ore or mineral body and is displaced during mining without being processed.

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  • Speciation and recovery of chromium from chromite ore ...

    The processing of chromite ore is associated with the generation of large quantities of solid wastes containing chromium, which have been disposed of as landfill for many years. The mobilization and operational speciation of chromium contained in soils contaminated with metal salts are important in …

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  • Refractory Gold Ore Treatment Methods

    Metallurgical ContentGold Leaching Processing of Arsenic OreMispickel (Arsenopyrite: FeAsS).6Leaching and Recovering Gold from Antimony MineralsStibnite (Antimony Sulphide, Sb2S2)Telluride Gold Ore ProcessingSolubility of TelluridesGold Extraction from Carbonaceous OreList Gold Refractory Process Methods Where gold is associated with arsenic, antimony, tellurium, and …

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  • Some studies on recovery of chromium from chromite ore ...

    Some studies on recovery of chromium from chromite ore processing residues K J Sreeram", M K Tiwarib T Ramasami" "Chemical Laboratory, Central Leather Research Institute, Adyar, Chennai 600 020, India "Centre for Advanced Technology, Indore, 452 …

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  • Detoxification and immobilization of chromite ore ...

    Schematic illustration of detoxification and immobilization of chromite ore processing residue in spinelbased glassceramic matrix. All Cr(VI) species is reduced to Cr(III) and most chromium contents are incorporated into spinel structure where the residual chromium are resided in the glass networks. Download highres image (162KB)

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  • Chromite ore processing residue in Hudson County, New Jersey.

    Chromite ore processing residue occurs at over 130 sites in Hudson County, New Jersey. Many of these sites are in urban residential areas. This waste is a result of 70 years of chromate and bichromate chemical manufacturing. At least 15% of the sites contain total chromium concentrations greater ...

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  • US7645092B2 Treatment of in ground chromium ore ...

    In methods for treatment of in ground chromium ore processing residue contamination, ferrous sulfide is provided as a substantially insoluble material in the residue deposit. The ferrous sulfide accordingly may remain substantially in place, in the pores of the soil or residue, even over long periods of time, regardless of underground water movement or diffusion.

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  • PHASES OF A MINING PROJECT Home | ELAW

    PHASES OF A MINING PROJECT There are different phases of a mining project, ... metallic material of the ore in a process called ... waste called ‘tailings,’ the residue of an ore that remains after it has been milled and the desired metals have been extracted (, with cyanide ...

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  • Pyrolysis Treatment of Chromite Ore Processing Residue by ...

    The pyrolysis treatment with biomass is a promising technology for the remediation of chromiteoreprocessing residue (COPR). However, the mechanism of this process is still unclear. In this study, the behavior of pyrolysis reduction of Cr(VI) by cellulose, the main component of biomass, was elucidated. The results showed that the volatile fraction (VF) of cellulose, ie. gas and tar, was ...

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  • Chromium Ore Processing Residue

    The reduction of chrome bearing ores in the production of industrial grade chromium compounds results in a waste rich in metals contamination. This byproduct is variously referred to as chromite ore processing residue, chrome ore processing residual or chrome tailings; for the purposes of MDE reports these variants are referenced as COPR.

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  • Antimony Recovery from EndofLife Products ... SpringerLink

    This has sparked efforts to find secondary sources of antimony either through the recycling of endoflife products or by recovering antimony from industrial process residues. Valuable residues are obtained by processing of gold, copper, and lead ores with high contents of antimony.

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  • Chromium Remediation or Release? Effect of Iron(II ...

    Chromite ore processing residue (COPR), derived from the socalled high lime processing of chromite ore, contains high levels of Cr(III) and Cr(VI) and has a pH between 11 and 12. Ferrous sulfate, which is used for remediation of Cr(VI) contamination in wastewater and soils via reduction to Cr(III) and subsequent precipitation of iron(III)/chromium(III) hydroxide, has also been proposed for ...

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  • US7670576B2 Methods of treatment of chromite ore ...

    US7670576B2 US11/578,621 US57862105A US7670576B2 US 7670576 B2 US7670576 B2 US 7670576B2 US 57862105 A US57862105 A US 57862105A US 7670576 B2 US7670576 B2 US 7670576B2 Authority US United States Prior art keywords copr oxygen scavenger contacting ore processing chromite ore Prior art date 20040910 Legal status (The legal status is an assumption …

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  • NJDEP New Jersey Department of Environmental Protection

    This was done in response to concerns voiced by the Hudson County community where most of the chrome ore processing residue waste sites are located. An internal DEP workgroup was formed and chaired by Eileen Murphy, (DSRT). A report was prepared in 2005 with the findings of the workgroup (see link below).

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  • Chromite ore processing residue in Hudson County, New ...

    Chromite ore processing residue occurs at over 130 sites in Hudson County, New Jersey. Many of these sites are in urban residential areas. This waste is a result of 70 years of chromate and bichromate chemical manufacturing.

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  • Disposal of ore processing residues Mineral Processing

    But that’s not all. The disaster resulted in claims for billions of dollars in compensation and damaged the image of an entire industry. This report reviews the situation of dam safety in mining industry retention basins and shows what alternatives are available for the disposal of ore processing residues.

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  • Microstructural analyses of Cr(VI) speciation in chromite ...

    The speciation and distribution of Cr(VI) in the solid phase was investigated for two types of chromite ore processing residue (COPR) found at two deposition sites in the United States: grayblack (GB) granular and hard brown (HB) cemented COPR. COPR chemistry and mineralogy were investigated using ...

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  • Remediation of chromite ore processing residue using ...

    Batch tests were conducted to assess the potential use of ferrous sulfate and calcium polysulfide for the remediation of chromite ore processing residue (COPR). The remediation process entails...

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  • Bauxite tailings Wikipedia

    Bauxite tailings, also known as bauxite residue, red mud, red sludge, or alumina refinery residues (ARR), is a highly alkaline waste product composed mainly of iron oxide that is generated in the industrial production of alumina (aluminium oxide, the principal raw material used in the manufacture of aluminium metal and also widely used in the manufacture of ceramics, abrasives and refractories).

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  • Mining and Refining – Bauxite Residue Management

    The residue is pumped into land based ponds where naturally impervious layers or sealants minimise seepage. The residue is typically deposited as a dilute slurry, with the solids settling and consolidating over time and the surface water collected for return to the refining process.

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  • CHROMITE ORE PROCESSING RESIDUES IN GLASGOW, UK ...

    chromite ore processing residues in glasgow, uk: environmental impact and remediation of ground waters Raising the bar for occupational health management in construction Wendy Jones, Alistair Gibb, Roger Haslam and Jennie Armstrong

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  • Radioactivity : Mining residues

    Mining residues Waste from uranium extraction. The residues from processing uranium ores are disposed of on the sites of the mines. This mining waste is very lowlevel waste because uranium, which is very longlived (it can last for several billion years), is one of the least radioactive elements in nature and the uranium content of uraniumbearing ores is generally low.

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  • Rehabilitation and revegetation of ore processing residues ...

    Mineral processing residue stored in a disposal area is required to be fully remediated using best techniques of rehabilitation, revegetation and landscaping post closure. Mineral processing residue can exhibit several properties inhibitory to plant growth and ecosystem development. Developing ...

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  • (PDF) Characterization of Chromite Ore Processing Residue

    PDF | This paper summarizes the characteristics of chromite ore processing residue (COPR) in terms of their chemical compositions, phases, and recycling potential of iron and chromium through ...

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  • Chromium (VI) Retrieval from Chromium Ore Processing ...

    Sep 11, 2017· Electrokinetics (EK) was investigated as a possible technique for insitu treatment of leachable chromium at a built site contaminated with chromium ore processing residues (COPR). A preliminary EK experiment was carried out at the laboratory scale on an undisturbed COPR core sample.

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  • Conversion of Chromium Ore Processing Residue to Chrome …

    Conversion of Chromium Ore Processing Residue to Chrome Steel Introduction Chromium played an important role in the industrial development of New Jersey from 1905 to 1971. During that period, chromate (Cr6+) was produced from chromite ore at three facilities in Hudson County, NJ.

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  • Gold Ore Roasting Techniques Mineral Processing Metallurgy

    Metallurgical ContentRecover Gold by Roasting Pyrite OreRoasting of flotation concentratesRoasting Arsenopyrite Ore for GoldRoasting and leaching a sulphide concentrateRoasting and Processing Sulphotelluride ore to recover goldFluoSolids Roasting SystemRoasting with a FluoSolids reactorWhy use Salts in the roasting processROASTING WITH SODA ASHGOLD LOSSES IN …

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  • A new method for the treatment of chromite ore processing ...

    Oct 22, 2007· Chromite ore processing residue (COPR), derived from the socalled highlime processing of chromite ore, contains a significant fraction of a leachable Cr(VI) which is harmful to human being and other organisms.

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  • Aluminum processing Ores |

    Aluminum processing Aluminum processing Ores: Aluminum is the third most abundant element on Earth’s surface. Only oxygen and silicon are more common. Earth’s crust to a depth of 16 km (10 miles) contains 8 percent aluminum. Aluminum has a strong tendency to combine with other common elements and so rarely occurs in nature in the metallic form.

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