• An indigenous iron-reducing microbial community from MX80 ...

    In one potential UK repository concept, iron from carbon steel canisters may contribute to an iron-rich environment at the clay-canister interface. This could lead to changes in the mineralogy and iron-content of MX80 bentonite due to variation of the redox state and solubility, which in turn could alter the geomechanical properties of the clay.

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  • Effect of Bentonite on the Pelleting Properties of Iron ...

     · While the bentonite addition decreased, the drop number and thermal shock temperature of green balls improved by 0.9 times/0.5 m and 150 °C, respectively. This has resulted in an improvement in the overall iron grade of fired pellet by 1.02% and in CCS by 1000 N …

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  • Methods for Using Bentonite to Remove Pesticides from ...

     · [0180] In embodiments, the bentonite scrubbing procedure can reduce pesticide content of a cannabis extract, so that pesticide content (parts per million; ppm) is reduced to lower than 50% the initial value, to lower than 40%, to lower than 30%, to lower than 30%, to lower than 20%, to lower than 10%, to lower than 5%, to lower than 2%, or to ...

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  • Characterization of Co(II) removal from aqueous solution ...

     · The bentonite/iron oxide magnetic composites were prepared by co-precipitation method, and characterized by Fourier transform infrared spectroscopy, X-ray powder diffraction and scanning electron microscope. The prepared bentonite/iron oxide magnetic composites were used as a sorbent for the removal of Co(II) ions from radioactive wastewater. The results demonstrated that …

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  • Effect of Bentonite on the Pelleting Properties of Iron ...

     · The physical and chemical properties such as particle size, montmorillonite content, swelling degree, water absorption, and blue absorption of A, B, and C bentonites were studied under laboratory conditions. The effects of adding different quality and different proportion of bentonite on falling strength, compression strength, and shock temperature of green pellet were investigated.

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  • Removal of Oil Content from Oil-Water Emulsions Using Iron ...

     · Fig. 2 (b and c) show a uniform distribution of iron oxide nanoparticles on the bentonite surface due to the application of ultrasound waves. Additionally, the particle size of iron oxide nanoparticles on bentonite''s surface has an average value of 13.55 nm. While, Fe 3 O 4 NPs at 100 nm average diameter was 13.65 nm. This indicates that ...

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  • Safety and efficacy of bentonite as a feed additive for ...

     · Amendment: An editorial correction was carried out that does not materially affect the contents or outcome of this scientific output. The sentence in Section 2.1 referring to the Bentonite authorisation as food additive, and the footnote linked to it, have been amended. To avoid confusion, the older version has been removed from the EFSA Journal, but is available on request, as is a version ...

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  • Effect of Bentonite on the Pelleting Properties of Iron ...

     · When bentonite content is 1.5% and 1.3%, the falling strength of the green pellet improved compared with those of green pellets that contain 1.0% bentonite. Increasing homogeneous bentonite content from 1.5% to 1.0% gradually decreases the falling strength from 3.00 times/pellet to 2.53 times/pellet.

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  • Mechanisms of Advanced Oxidation Processing on …

    advanced oxidation (AO) process is employed in a green sand system, the foundry needs 20-35% less makeup bentonite clay than when AO is not employed. We herein sought to explore the mechanism of this enhancement and found that AO water displaced the carbon coating of pyrolyzed carbonaceous condensates that otherwise accumulated on the bentonite ...

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  • bentonite uses in the pelletising and sinter plant

    process to reduce iron content from bentonite heavy media separation iron ore bentonite What is claimed is 1 A process for beneficiating raw bentonite which . bentonite uses in the pelletising and sinter plant. process to reduce iron content from bentonite Decreasing bentonite dosage during iron ore pelletising Decreasing bentonite dosage.

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  • US4411530A

    A system and method for rapid beneficiation of bentonite clay is disclosed. Beneficiation of the bentonite clay occurs through oxidation of structural ferrous iron. For rapid beneficiation, bentonite clay, preferably ground, is subjected to moist air while the clay is being agitated, preferably by tumbling within a rotating drum, to provide rapid exchange of moisture and oxygen in the air with ...

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  • Removal of Brilliant Blue FCF from Aqueous Solutions Using ...

     · The iron content increased to 92 % in the clay after it was treated with iron chloride while the Mg content diminished, which indicates that Mg was exchanged by iron. Table 1 Elemental analysis of the unmodified clay, iron-modified clay, and saturated materials with brilliant blue FCF dye by EDS

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  • An indigenous iron-reducing microbial community from MX80 ...

     · In one potential UK repository concept, iron from carbon steel canisters may contribute to an iron-rich environment at the clay-canister interface. This could lead to changes in the mineralogy and iron-content of MX80 bentonite due to variation of the redox state and solubility, which in turn could alter the geomechanical properties of the clay.

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  • Bentonite in my formula: How to dry faster?

    The use of bentonite can be complemented with other additives to improve the final formula performance, especially along the drying process. We can use other plasticizers to reduce the amount of bentonite we add, hence optimizing the drying of tiles. …

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  • Taconite

    To process taconite, the ore is ground into a fine powder, the magnetite is separated from the gangue by strong magnets, and the powdered iron concentrate is combined with a binder such as bentonite clay and limestone as a flux. As a last step, it is rolled into pellets about 10 millimeters in diameter that contain about 65% iron.

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  • US3865240A

    Finely comminuted, crude bentonite may be purified of accompanying quartz, muscovite, illite, feldspar, iron oxide and like impurities by pouring an aqueous slurry of the clay into a very dilute aqueous solution of a technical grade of sodium hexametaphosphate, and letting the mixture stand a few minutes, whereby almost the entire mineral impurities present are precipitated.

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  • US6554049B2

    Sand, bentonite clay and organics recovered as foundry waste from a green sand mold foundry are reclaimed for reuse in making new green sand molds and mold cores by a multi-step process involving both hydraulic and mechanical separation steps.

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  • Direct reduced iron

    Direct reduced iron (DRI), also called sponge iron, is produced from the direct reduction of iron ore (in the form of lumps, pellets, or fines) into iron by a reducing gas or elemental carbon produced from natural gas or coal.Many ores are suitable for direct reduction. Direct reduction refers to solid-state processes which reduce iron oxides to metallic iron at temperatures below the melting ...

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  • Study on influencing factors and mechanism of removal of ...

     · In order to clarify the mechanism and effect of bentonite-supported nanoscale zero-valent iron ([email protected]) on Cr(VI) removal in soil suspended liquid, [email protected] was prepared by liquid-phase ...

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  • IMPROVEMENT OF MECHANICAL STRENGTH OF IRON ORE …

    bentonite to bind iron ore into pellets and reduce the total amount of bentonite required for a given quantity of iron ore fines. Sodium in soda ash replaces some of the calcium and magnesium in the bentonite lattice and thereby improves the binding efficiency of Ca-bentonite. However, it was believed that bentonite would not

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  • Long-term alteration of bentonite in the presence of ...

    The iron-bentonite interaction seemed to slightly decrease the swelling pressure, while the ... or specific adsorption of Fe to the octahedral edges may reduce the sorption sites for radionuclides. In contrast, precipitation of distinct Fe oxide minerals promotes adsorption or ... in iron content of the bentonite, decreasing with the distance ...

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  • CN101810146B

    The invention discloses a method for producing bentonite litter by calcium-based bentonite. The method comprises the following steps of: grinding, acidification, sodium-modification, forming, drying and the like. In method, the calcium-based bentonite crude ores are used as a starting point, the bentonite slices are acidified and corroded by an acidifier so as to greatly increase a ...

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  • Process for beneficiating bentonite

    A process according to claim 1, wherein the surface staining by iron oxides is reduced substantially by forming the bentonite into a slurry with water containing at least one of a water-soluble reducing bleaching agent and a complexing agent for ferric iron, and thereafter separating the bentonite from the aqueous solution containing dissolved ...

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  • How to Reduce the Soil''s Resistivity

     · In addition to reducing the resistance to ground of rods and cables, the moisture retention process of the bentonite compound protects against corrosion. Bentonite performance is highly dependent on the amount of rainfall, soil moisture, and temperature at the site. In hot climates, the soil dries out, and the bentonite does not work as desired.

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  • Removal of Heavy Metals Using Bentonite Clay and Inorganic ...

     · Some studies were conducted [ 51, 54] to reduce turbid materials from AMD using a combination of bentonite clay and inorganic coagulants. Among their studies, a combination of bentonite clay and Na 2 CO 3 [ 53] was employed to remove the heavy metals from the AMD sample.

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  • EP0862853A1

    EP0862853A1 EP97850033A EP97850033A EP0862853A1 EP 0862853 A1 EP0862853 A1 EP 0862853A1 EP 97850033 A EP97850033 A EP 97850033A EP 97850033 A EP97850033 A EP ...

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  • What is the complimentary Bentonite application in ...

     · In the mining field, bentonite is mainly used in metallurgy, casting, drilling and wastewater treatment, as an inorganic binder, thickener and rheology control agent for aqueous media systems. 1. Foundry industry The foundry industry mainly uses t...

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  • Direct reduced iron process

     · Direct reduced iron (DRI) process. In addition to the process route via the blast furnace process, there is another option for extracting crude steel from iron ores using the so-called direct reduced iron (DRI) process (secondary route).The starting point for the efforts to find an alternative to the blast furnace process was the relatively high process expenditure.

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  • How to Reduce an Iron Overload | Healthy Living

     · Iron overload can have primary or secondary causes. The primary cause is most often hereditary hemochromatosis, a genetic disorder of metabolism that causes too much iron to be absorbed from food . Secondary causes include excessive oral intake of iron and repeated blood transfusions. Iron accumulates in endocrine organs, liver and heart.

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  • 11.25 Clay Processing

    Bentonite - A flow diagram for bentonite processing is provided in Figure 11.25-5. Mined bentonite first is transported to the processing plant and stockpiled. If the raw clay has a relatively high moisture content (30 to 35 percent), the stockpiled material may be plowed to facilitate air drying to a moisture content of 16 to 18 percent.

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  • Bentonite

    Bentonite (/ ˈ b ɛ n t ə n aɪ t /) is an absorbent swelling clay consisting mostly of montmorillonite usually forms from weathering of volcanic ash in seawater, which converts the volcanic glass present in the ash to clay minerals. Bentonite beds are white or pale blue or green in fresh exposures, turning to a cream color and then yellow, red, or brown as the exposure is weathered further.

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  • Metal Passivation: Preventing Iron from Getting Active ...

    To prevent this, active or passive processes are used to reduce corrosion. These processes generally work by "sealing" the metal with a top layer, preventing air and water from reaching the metal underneath. The layer can be manmade: paint, powder coating, and oil are all common sealants. If they are scratched, however, corrosion sneaks in.

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  • Bentonite

    Because of the high iron content, bentonite is considered a dirty material and thus the tug-of-war between the valuable working properties it imparts and the need for whiteness or pure color that it impedes. Fine particle size: Bentonite is colloidal (particles are so small the action of water molecules is enough to keep them in suspension).

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