Ore dressing in the mining necessitates a significant amount of water, yet water resources are limited at the mine sites, and usually not enough fresh water is …
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Prevention and control of other environmental pollution generated during the operation of high-speed railway. Yulong He, ... Changgen Mei, in High-Speed Railways, 2023. 7.1.3.2.9 Chemical flocculation reinforcement tanks. The chemical flocculation mixing process requires intense turbulence in a relatively short period of time to mix the agent and water …
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Slurries that did not settle and, thus, could not be filtered presented challenges with regards to process recovery. Therefore, strategies to promote flocculation were developed in the 1940 and 1950s using polyelectrolyte flocculating agents that could improve the filterability of uraniferous ores during chemical processing [42].
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Introduction. Mine backfilling plays a significant role in improving ground stability, increasing ore recovery, and controlling underground pressure and thus has both economic and environmental benefits [1–3].Therefore, mine backfilling is being widely used all over the world in many underground mines [4–6].The development of backfilling …
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complexing agent such as diphenylguanidine that interacts specifically with copper minerals. In-teractions between many components are possible in these systems and these are examined in order to identify the governing mechanisms. INTRODUCTION Selective flocculation using polymers is a promising method for beneficiat-ing mineral fines [1,2J.
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The results of Table 7.2 show that chitosan gave a better flocculating effect. The precipitation was measured to 17 g dry matter per liter OMWW. As mentioned before, silicate as a precipitation agent will result in the forming of a gel representing a significant problem at a subsequent filtering of the aqueous phase after the flocculation step.
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The use of a comparatively new flocculating agent C.M.C. Carboxel, or sodium carboxymethylcellulose, is described by E. E. Brown, mill superintendent of the Chesterville Mines, Ltd. A water-soluble "H.V." grade used in the amount of 0.01 lb. per ton of ore increased the settling rate in the thickeners by 8 to 10 per cent.
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In this paper, the paste tailing preparation and stacking technology were applied in Wunugetushan Copper-molybdenum ore where in high latitude cold area of our country, the paste tailing preparation and stacking technology, Deep-cone thickener, Diaphragm pump and flocculating agent adding device were introduced. The production practice has …
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Flocculation is a process used widely across industries to form large aggregates from smaller, dispersed particles. Aggregates are termed flocs and may settle, rise, or be easily filtered out of the liquid ().Flocculants or flocculating agents are the chemicals used to carry out the process of flocculation.. This page is a place to collect and organize …
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54.7 Summary. In this chapter, we learned that three main ferrous burden materials are used in BF operation; lump ore, sinter, and pellets. The types of iron ores used to produce these three ferrous charge materials and the related production methods were described. The various analysis methods used to determine the quality of the BF charge ...
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Polymer flocculants are water-soluble polymers which can form flocs from individual small particles in a suspension by adsorbing on particles and causing destabilization through bridging or charge neutralization. Polymer flocculants are high molecular weight polymers and have hydrogen-bonding groups and/or ionic groups in the …
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The flotation concentrate is then dewatered and filtered to produce a filter cake that is sent to a copper smelter. Copper processing - Ores, Refining, Smelting: Principal forms in which copper ores are found include native copper, porphyry copper, massive deposits, and mixed ores. Native copper is simply the metal found unadulterated in nature.
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Particular attention is paid to new biosynthetic flocculating agents, nano(bio)flocculants, and smart (intelligent) materials. Due to the large amount of literature on flocculation in water treatment and the narrow aspects of individual published works, our intention is to summarize in one article the latest achievements on the acquisition of ...
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The conventional flocculating agent can be classified into inorganic and organic additives. The inorganic mineral additives/metal salts are often used as coagulants, such as FeCl 3, AlCl 3 and polyaluminium chloride (PAC), whose performance is poor compared to organic flocculants [4,5,6]. The organic flocculants are water-soluble …
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for copper cementation followed by a Kennecott sedimentation cone for final settling of the precipitated copper. Any overflow of copper beyond this equipment meant a revenue …
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Forty-eight batch rougher flotation experiments (pH 11.5) for Miduk porphyry copper ore consisting of 0.9% Cu were conducted at different conditions using a bench …
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The present invention relates to ore dressing and tailings glass technical field, and in particular to a kind of to be used for the amphoteric polyacrylamide flocculating agent of ore dressing and tailings glass, and the amphoteric polyacrylamide flocculating agent raw material includes monomer and water；Wherein the mass fraction of monomer, which is …
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effective as DR agents is thus explained. We note that flocculation agents are also effective at these very low concentrations. The original model of DR defined in [6] was provided with a direct experimental verification in 1999 [8]: the larger the solvation number of a polymer in a given liquid medium, the higher is the DR efficacy of that ...
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The high-sulfur secondary-sulfide copper ore collected from the Zijinshan copper mine in the Fujian province contains 0.4% copper, among which the main copper minerals were covellite and digenite with high pyrite content (up to 5.58%) [1]. ... adjustors, dispersing agents (such as water glass, sodium hexametaphosphate (NaPO3)6, methyl …
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Flocculating agents are either inorganic salts or water‐soluble organic polymers. They act by shrinking the ionic double layer, or neutralizing the surface charge of suspended particles, or bridging between particles. The type of flocculant used depends on the type of solid‐liquid separation being performed. The physical properties and size ...
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A study by Akhlaghi et al. has shown that amine-functionalised CNCs exhibited promising results as a flocculating agent in water treatment due to the presence of a high number of amine groups. At low pH, the zeta potential of the CNCs was reported to change from negative to positive. ... (15.4 NTU for Fe ore and 20.2 NTU for Mn ore) than …
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effective as DR agents is thus explained. We note that flocculation agents are also effective at these very low concentrations. The original model of DR defined in [6] was provided …
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Flocculation is either induced (with the addition of flocculating agents) or naturally happens (due to the production of the flocculating chemical by microalgal cells). Auto flocculation occurs due to the increase in pH. Sometimes, it can be a consequence of the interaction of contaminating species with microalgae. Microalgal cells form a ...
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They observed that these grafted copolymers are effective flocculating agents for wastewater from the dyeing of silk . ... especially in the flotation of potash and copper–nickle sulphide ores. They are used in concentration of 0.2–0.5 lb (0.1–0.25 kg) ...
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Processing of high clay ores is usually related to negative effects in particular in the flotation stages. A good description was made recently in the work by Chen and Peng (2018), who developed a general review about the mechanisms and behaviour of clays in mineral flotation.The background they presented is general and useful for any situation in …
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Abstract. Flocculation is an essential phenomenon in industrial wastewater treatment. Inorganic coagulants (salts of multivalent metals) are being commonly used due to its low cost and ease of use. However, their application is constrained with low flocculating efficiency and the presence of residue metal concentration in the treated …
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Flocculation. Part of the book series: Encyclopedia of Earth Sciences Series ( (EESS)) This is the aggregation of a discontinuous (disperse) phase in a continuous one, commonly of solid particles in a liquid. The resulting aggregates are flocs, from the Latin "floccus" (a lock of wool). The late Latin diminutive "flocculus" gave ...
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complexing agent such as diphenylguanidine that interacts specifically with copper minerals. In-teractions between many components are possible in these systems and …
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. Background: Nitrofurantoin is a nitrofuran antibiotic that has been used for treatment of urinary tract against positive and negative bacteria. Objectives: The aim of this study was to evaluate the effect of structural vehicles and flocculating agents on physical stability and rheological behavior of nitrofurantoin suspension.
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how ppm concentrations of a flocculating agent are sufficient. In Figure 1 we show a schematic illustrating how one chain pervades a large volume of the liquid. Figure 1. A section of a macromolecular chain in forming of a domain pervaded by a chain in the system of liquid + suspended solid particles. Liquid
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