Flocculation, in physical chemistry, separation of solid particles from a liquid to form loose aggregations or soft flakes. These flocculates are easily disrupted, being held together only by a force analogous to the surface tension of a liquid. In industrial processes, flocculation may be a
Abstract. Flocculation is a characteristic property of colloidal dispersions. The typical classical sol contained sub-microscopic dispersed particles which would pass freely through ordinary filter-paper, and were too small to be resolved by any transmission optical microscope. Consequently, an arbitrary size limit of 0.1 m could be defined as the upper size boundary of the colloidal range.
Coagulation and Flocculation Process Fundamentals 1 Coagulation and Flocculation . Groundwater and surface water contain both dissolved and suspended particles. Coagulation and flocculation are used to separate the suspended solids portion from the water. Suspended particles vary in source, charge, particle size, shape, and density. Correct ...
minerals and during these processes tailings generated as waste products. For increasing the recovery of valuable minerals, water and small amount of chemical materials and reagents are used during this process. Extracting minerals from primary ores depends on mineral types, but there are some steps which are common in the process.
PRINCIPLES OF FLOCCULATION, DISPERSION, SELECTIVE FLOCCULATION 951 1 induced dipoles. These forces vary as Where d is the intermolecular spacing. For macroscopic bodies, the forces When summed over all the 1 molecules in the body vary as dIi. n.has a value less than 6, depending upon the shape of the interacting bodies.
The use of physical floc conditioning to control the sedimentation and dewatering filtration behavior of flocculated, fine-particle suspensions is evaluated in terms of its effects on floc size ...
3.1 Selective flocculation or sulfides As indicated earlier, selective flocculation of a mixture of minerals is significantly different from that of a single mineral. One of the reasons for this is the dissolution, precipitation readsorption of mineral species from one mineral onto another. When mineral
Flocculation is used primarily for the precipitation of inorganic substances. It is used to enhance sedimentation or centrifugation. The waste stream is mixed while a flocculating chemical is added. Flocculants adhere readily to suspended solids and to each other agglomeration, and the resultant particles are too large to remain in suspension.
Flocculation, in physical chemistry, separation of solid particles from a liquid to form loose aggregations or soft flakes. These flocculates are easily disrupted, being held together only by a force analogous to the surface tension of a liquid. In industrial processes, flocculation may be a
In the mining industry guar gum is used as a flocculant or flotation agent, foam stabilizer, filtration and water treating agent. In the textile industry, it is used as a sizing agent and as a
classification through polymer flocculation. Mining . Eng. March, 293-297. Proceedings of the X. Balkan Mineral Processing Congress, 15-20 June 20013, Varna-Bulgaria 299.
anionic flocculant used for Tailings flocculation Mining processes produce large quantities of fines as waste that need to be handled for the continuity of the operation. The most common treatment route is to thicken the material prior to disposal, shrinking the volume required for tailings storage and allowing water recovery and reuse in the process.
The processes of coagulation and flocculation using high molecular weight long-chain polymers were applied to treat mine water having fine flocs of which about 93 of the total mass was less than 3.02 microm, representing the size distribution of fine particles. Six different combinations of acryl-t
Quartz and clay minerals were used for comparison. Flocculation tests showed that the bioflocculant effectively flocculated coal waste slurry. Approximately 83 of the flocculation rate was achieved at a bioflocculant dosage of 80 mgL when the coal waste slurry concentration was 30 gL. The maximum flocculation of coal waste slurry occurred ...
PRINCIPLES OF FLOCCULATION, DISPERSION, SELECTIVE FLOCCULATION 951 1 induced dipoles. These forces vary as Where d is the intermolecular spacing. For macroscopic bodies, the forces When summed over all the 1 molecules in the body vary as dIi. n.has a value less than 6, depending upon the shape of the interacting bodies.
Coagulation-Flocculation The stages in agglomeration Coagulants and flocculants Reagents The coagulants . Trivalent cations the neutralization of the negative surface of the colloid is accomplished by the addition of cations in the case of inorganic coagulants. The trivalent ions are ten times more effective than the divalent ion.
1 1 Coagulation performance and floc characteristics of polytitanium 2 tetrachloride and titanium tetrachloride compared with ferric chloride for 3 coal mining wastewater treatment 4 5 6 J. Galloux a,b , L. Chekli a, aS. Phuntsho , L.D. Tijing a, S. Jeong , Y.X. Zhao c, B.Y. Gao c, S.H. 7 Parkd and H.K. Shon a, 8 a School of Civil and Environmental Engineering, University of Technology ...
Jan 17, 2017 The flocculation technique is the most common sedimentation method for the dewatering of coal waste slurry, which is fine grained and has high ash content. Bioflocculants are flocculants which are vital to accelerating the settling of coal waste slurry via the flocculation technique. In this work, the bioflocculation of coal waste slurry was studied using a biofloccuant produced by Azotobacter ...
On the other hand are cationic materials, which are not usually used in the minerals industry. They are more common in water treatment. M-2-146P. Before we had FBRM,,y p, when we would study the flocculation process, we would measure the settling rate and residual turbidity. The standard way to test for flocculation was to use a measuring ...
Aug 16, 2021 Flocculants are also used in the mining industry for dewatering the surface and underground mines, which reduces the sludge volume. High molecular weight, water-soluble polymer flocculants enable much larger aggregates to form, leading to much higher mass throughputs, as well as the potential to greatly reduce thickener diameters.
Flocculation and coagulation treatment chemicals are used in effluent wastewater water treatment processes for solids removal, water clarification, lime softening, sludge thickening, and solids dewatering. Coagulation treatment neutralizes the negative electrical charge on particles, which destabilizes the forces keeping colloids apart.
Abstract. In this study, two placer mine discharge waters of different characteristics were tested in order to determine the applicability of organic polymer flocculants to achieve reduced levels of turbidity. The water samples from both mines were characterized both as to their chemical and physical properties.
The use of natural and synthetic polymeric flocculants can be used to generate larger , more stable flocs and may reduce treatment times. This is achieved by bringing dispersed particles together, increasing the effective particle size. Flocculants can be used alone, or in combination with coagulants.
Abstract. In this study, two placer mine discharge waters of different characteristics were tested in order to determine the applicability of organic polymer flocculants to achieve reduced levels of turbidity. The water samples from both mines were characterized both as to their chemical and physical properties.
The processes of coagulation and flocculation using high molecular weight long-chain polymers were applied to treat mine water having fine flocs of which about 93 of the total mass was less than 3.02 microm, representing the size distribution of fine particles. Six different combinations of acryl-t
The processes of coagulation and flocculation using high molecular weight long-chain polymers were applied to treat mine water having fine flocs of which about 93 of the total mass was less than 3.02 microm, representing the size distribution of fine particles. Six different combinations of acryl-t
The coagulation-flocculation processes facilitate the removal of SS and colloidal particles. Its used in the first stage of solids-liquids separation settling, flotation or filtration . Coagulation is the destabilization of colloidal particles brought about by the addition of a chemical reagent called as coagulant.
Coagulation-Flocculation The stages in agglomeration Coagulants and flocculants Reagents The coagulants . Trivalent cations the neutralization of the negative surface of the colloid is accomplished by the addition of cations in the case of inorganic coagulants. The trivalent ions are ten times more effective than the divalent ion.
Aug 13, 2015 Thickener Operating pH and Lime for Flocculation amp Improved Settling. Settling Without VS With Flocculant. If, for some reason, the thickeners settling rate is too slow, as in the case of the grind being so fine or you are dealing with clay rich ore and now the concentrate stays in suspension. The thickener could be sliming and will ...
Coagulation-flocculation is a chemical water treatment technique typically applied prior to sedimentation and filtration e.g. rapid sand filtration to enhance the ability of a treatment process to remove particles. Coagulation is a process used to neutralise charges and form a gelatinous mass to trap or bridge particles thus forming a mass large enough to settle or be trapped in the filter.
