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  • Ore sorting Efficiently optimise the treatment of ores in

     · Use ore sorting equipment to concentrate ores and cut process costs There are many ways of improving recovery processes for a wide variety of ores using sorting equipment. At STEINERT we always take the same approach sorting waste rock and ore with low concentrations out from the process at an early stage to save energy and resources and to

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  • Circular economics reprocessing waste and mining

     · Quite often these old waste dumps are an unknown quantity and as such present some problems. Before any attempt can be made to reprocess one a

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  • Retreatment of Residues and Waste RockSAIMM

     · Retreatment of Residues and Waste Rock D.W. Bosch 12.1 Introduction From the commencement of gold mining on the Witwatersrand in 1887 up to 1984 a total of approximately 4 2 billion tons of gold ore has been milled in South Africa. The deposition of gold mine residues has left the country

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  • Leachability of metals from waste incineration residues by

    Hazardous waste disposal via incineration generates a substantial amount of ashes and slags which pose an environmental risk due to their toxicity. Currently these residues are deposited in landfills with loss of potentially recyclable raw material. In this study the use of acidophilic bioleaching

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  • WHO WasteWHO World Health Organization

    • Residues from shipments of radioactive material and unwanted solutions of radionuclides intended for diagnostic or therapeutic use • Liquid immiscible with water such as liquid scintillation-counting • Residues used in radioimmunoassay and contaminated pump oil • Waste from spills and decontamination of radioactive spills

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  • Radioactivity Fuel reprocessing

     · Separating waste and recoverable materials The purpose of chemical reprocessing operations is to separate the atoms found in irradiated fuel pellets into three fractions recycled enriched uranium (URE) which can be recycled as it still contains 1 of fissile isotope 235 plutonium of which 70 of the nuclei are fissile and can produce energy residual fission products and minor actinides

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  • No More WasteWays to Re-Use Your Vaporized Dry Herbs

    Process First measure your desired amount of AVB and add it to a large saucepan. Next add your oil or butter to the pan followed by the lecithin. Lecithin is an emulsifier to help with permanently mixing the goodies from the AVB into the oil. You need a tablespoon of lecithin to every cup (250ml) of oil you use.

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  • ReprocessingEVE University Wiki

     · To further reduce waste there are individual ore skills for each ore type and a generic ice skill for all ice typesthese can be found on the Resource Processing page. Each level of that respective skill offers a final 2 increase to efficiency for the corresponding material 10 at level V.

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  • Long-Term Leaching Behavior of Chromite Ore Processing

    Leaching characteristics of chromium ore processing residue (COPR) for the long term (simulating a 20-year leaching scenario) were investigated using laboratory flow-through column testing with synthetic rainwater and groundwater for 250 pore volumes of flow (PVFs).

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  • Chromium Ore Processing ResidueMaryland

     · ore and produced industrial materials used in steel products leather tanning paint and miscellaneous other products. A byproduct of the refining process was a soil like residue generally identified as COPR. Beginning in 1916 much of the plant s COPR waste went to a plant owned facility in Dundalk for use as

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  • Characterization of Chromite Ore Processing Residue

    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 preliminary magnetic separation.

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  • Sustainable practices in the management of mining waste

    The authors argue that the fine line between waste and ore requires a mine waste management (MWM) hierarchy that properly considers waste as a potential future resource. This hierarchy exhibits four main levels reduce reprocess stockpile downcycle and dispose which are illustrated by a review of both academic research and public data on

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  • Soybean Curd Residue Composition Utilization and

     · Soybean curd residue (SCR) namely okara in Japanese is the main surplus material of soybean products and it is often regarded as waste. About 1.1 kg of fresh SCR is produced from every kilogram of soybeans processed into soymilk or tofu 2 .

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  • TENORM Copper Mining and Production Wastes US EPA

     · Significant waste volumes are associated with copper production. Mine wastes may contain radionuclides due to their natural presence in ores and can be a source of TENORM. Uranium which may be co-located with copper ore may also be recovered as a side stream if economical. However in the United States this is not a general practice.

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  • Bioleaching to reprocess sulfidic polymetallic primary

     · Bioleaching to reprocess sulfidic polymetallic primary mining residues Mine waste ABSTRACT Experiments were performed using the secondary ore leach residue reclaimed from the primary bioleaching heap of Sotkamo mine (Terrafame Finland). A sample of 30 kg of this secondary ore was

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  • Pyroprocessing TechnologiesArgonne National

     · Provide advanced pyroprocessing technologies that are economical to use Argonne scientists and engineers are developing commercially viable technologies with the following characteristics Robust process chemistry and engineering Minimal secondary waste production In line with U.S. non-proliferation objectives Nuclear Waste into a "Wonderfuel"

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  • Characterization of Chromite Ore Processing Residue

    This paper summarizes the characteristics of chromite ore processing residue (COPR) in terms of their chemical compositions phases and recycling potential of iron

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  • Evaluation of the performance of iron ore waste as

     · Evaluation of the performance of iron ore waste as potential recycled aggregate for micro-surfacing type cold asphalt mixtures. Asphalt pavement maintenance requires large amounts of materials and from the environmental point of view it is very important to look for alternative materials that improve the mechanical qualities of the pavement and one of the preventive maintenance options is to

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  • Recovering and recycling phosphorus from incinerated

     · immediate use as a fertiliser on agricultural fields in Sweden. However it is possible to extract the phosphorus the researchers suggest and this could be used to produce phosphate fertilisers which will also reduce the need to mine new phosphorus ore. In

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  • WHO WasteWHO World Health Organization

    • Residues from shipments of radioactive material and unwanted solutions of radionuclides intended for diagnostic or therapeutic use • Liquid immiscible with water such as liquid scintillation-counting • Residues used in radioimmunoassay and contaminated pump oil • Waste from spills and decontamination of

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  • Zero wasteSplosh

    That means 70 less plastic waste. So the combined effect of concentration and using pouches reduces plastic by around 95 . And that s greatbut how we do achieve that extra 5 to hit the zero waste mark 3. We re-use or reprocess our pouches into new products. You

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  • Sustainable use of mine waste and tailings with suitable

     · ore (Indian Chamber of Commerce May 2015). The production of iron ore in was 129.10 Mt (Annual report Ministry of Mines Govt. of India). Production of such large quantity of ore also increases generation of waste. The waste generated from mining processing and wastes accumulating at mine sites is shown in Table 1. 222

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  • Management of Bulk NORM Residues and Waste (Part 1)

     · Bulk NORM residues Process / residue Radionuclide Activity concentration (Bq/g) Uranium mining —tailings 230Th 226Ra <10 to several 100 Uranium mining —waste rock 238U 0.1 –20 Copper mining —waste rock 238U 0.1 –2 Dry separation of mineral sand—tailings 232Th 1 –20 Bauxite processing —red mud 232Th 0.1 –3 Beneficiation of phosphate rock —tailings 238U 0.01 –2

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  • EGA and VITO to intensify research on the potential use of

    Although for decades academic research has been conducted on potential uses most bauxite residue produced worldwide is still stored indefinitely as waste. Industry experts estimate that at least 150 million tonnes of bauxite residue is produced worldwide each year and less than two percent of this is currently put to productive use.

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  • NORM Industries and Regulatory Considerations

     · 1. Mining and processing of uranium ore HIGHER CONCERN 2. Extraction of rare earth elements 3. Production and use of thorium and its compounds 4. Production of niobium and ferroniobium 5. Mining of ores other than uranium ore 6. Production of oil and gas 7. The zircon and zirconia industries 8. Manufacture of titanium dioxide pigment 9. The

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  • Managing Reusing and Recycling Used Oil US EPA

     · Managing Reusing and Recycling Used Oil. Used oil is exactly what its name implies any petroleum-based or synthetic oil that has been used. Oil keeps our cars lawnmowers and many other machines running smoothly. However during normal use impurities such as dirt metal scrapings water or chemicals can get mixed in with the oil so that

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  • Tailings and Waste RockClean EnvironmentCameco

     · Management of waste rockWaste rock comes in three general types which must be managed appropriately . mineralized waste rock U 3 O 8 concentration of greater than 0.03 non-mineralized waste rock U 3 O 8 concentration less than 0.03 and is categorized as either "clean" or potentially acid-generating based on the likelihood of acidic seepage More about waste rock generation

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  • MODULE 18 Management of Chemical Cytotoxic

    • Residues from shipments of radioactive material and unwanted solutions of radionuclides intended for diagnostic or therapeutic use • Liquid immiscible with water such as liquid scintillation-counting • Residues used in radioimmunoassay and contaminated pump oil • Waste from spills and decontamination of radioactive spills

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  • Nuclear Reprocessing Dangerous Dirty and Expensive

     · Reprocessing and the use of plutonium as reactor fuel are also far more expensive than using uranium fuel and disposing of the spent fuel directly. In the United States some 60 000 tons of nuclear waste have already been produced and existing

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  • Mine tailings reprocess recover recycleThe

     · Say a copper mine produced 1Mt of metal in 1999 at 90 recovery. The remaining 10 of copper around 111kt went to tailings. If the average copper price in 1999 was US 1 500/tonne then that 10 represented US 166.5 million of metal. Fast forward 20 years and at today s price US 5 842/tonne if that material could be reprocessed and an extra

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  • Chrome Steel from Chromium Ore Processing Residue

     · The primary objective of this manuscript is to demonstrate an efficient and optimum way to recover chromium and iron from COPR in the production of chrome steel or stainless steel. In this research COPR was thermally treated to recover iron together with chromium. The research applied techniques used in steel manufacturing to extract metallic

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  • Recent advances in new generation dye removal

     · Among the various studies described in Table 1 Giri et al. 38 use iron ore tailings a waste from the steel and iron industry to synthesize magnetite nanoparticles providing a chance to re-use waste iron ore tailings. Acid leaching–precipitation and co-precipitation processes were used to produce magnetite nanoparticles.

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  • EGA and Gulf Extrusions agree innovative re-use of

    EGA recycles around 100 000 tonnes of its own waste each year including sending major waste streams as feedstock to industries including cement manufacturing. Under the agreement Gulf Extrusions will supply EGA with some 450 tonnes of spent caustic soda from its Abu Dhabi and Dubai extrusion plants each month for use in alumina refining.

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  • Ottery MineNSW Resources and Geoscience

     · In 1925 the arsenic ore became rich in tin as well as arsenic so further crushing and extraction of tin was undertaken. From 1931 to 1936 the mine was inactive and the facilities fell into disrepair. Whilst mining operations ceased in 1936 they recommenced for one year in 1956 to reprocess the remains of the calcined waste dump.

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  • Mining and RefiningBauxite Residue Management

    Bauxite residue is a by-product of the Bayer Process. It is primarily composed of the insoluble fraction of the bauxite ore that remains after extraction of the aluminium-containing components. Iron oxides (1030 ) titanium dioxide (215 ) silicon oxide (520 ) and undissolved alumina (020 ) make up the residue together with

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  • Effective Use of Mine Waste in the Design of a Residue

    A residue storage facility (RSF) was designed to cater for Davidson Creek Area and Robertson Range Area operations under the FerrAus Pilbara iron ore development project in the Pilbara Region Western Australia. Annual ore production was about 15 million tonnes over a period of up to 15 years. The RSF was designed to handle a tailings production rate of 2.2 Mt/a over the project life with

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  • Effect of Iron Ore Tailing on the Properties of Concrete

    The use of rock dust as an alternative to natural sand was also reported by (Nagaraj and Banu 1996). The use of up to 20 quarry waste fine as a partial replacement for natural sand in the production of concrete in Malaysia was also reported (Safiuddin et al 2007). Use of crushed granite fines or crushed rock fines as an alternative to

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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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  • Retreatment of Residues and Waste RockSAIMM

     · Retreatment of Residues and Waste Rock D.W. Bosch 12.1 Introduction From the commencement of gold mining on the Witwatersrand in 1887 up to 1984 a total of approximately 4 2 billion tons of gold ore has been milled in South Africa. The deposition of gold mine residues

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  • Disinfection Sterilization Guidelines Guidelines

    Remove visible organic residue (e.g. residue of blood and tissue) and inorganic salts with cleaning. Use cleaning agents that are capable of removing visible organic and inorganic residues. IB 2.b.ii. Clean medical devices as soon as practical after use (e.g. at the point of use) because soiled materials become dried onto the instruments.

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  • Bioleaching to reprocess sulfidic polymetallic primary

     · These residues known as secondary ore are only partially leached they are stacked on the Secondary Leaching pad in multiple layers and submitted to secondary leaching to improve metal recovery. The residues (referred as secondary ore in this paper) are presently around 5 Mt./year and remain permanently in the secondary heaps.

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  • Nuclear Reprocessing Dangerous Dirty and Expensive

     · Reprocessing and the use of plutonium as reactor fuel are also far more expensive than using uranium fuel and disposing of the spent fuel directly. In the United States some 60 000 tons of nuclear waste have already been produced and existing reactors add some 2 000 metric tons of spent fuel annually.

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