3 edition of Selective Flocculation and Flotation of A Mesabi Range Hematitic-Goethitic Taconite. found in the catalog.
Selective Flocculation and Flotation of A Mesabi Range Hematitic-Goethitic Taconite.
United States. Bureau of Mines.
|Series||Report of investigations (United States. Bureau of Mines) -- 8482|
|Contributions||Jacobs, H., Colombo, A.|
Flocculation Flocculation is the next step in most treatment plants (in-line filtration plants being the exception). Flocculation is the “snowballing” of sm all particles into larger particles (called “floc”). It is a time-dependent process that directly affects clarification efficiency by providingFile Size: 42KB. neutralization, sweep flocculation, and inter-particle bridging. Sweep flocculation is the primary mechanism used for drinking water treatment and will be the focus of this lesson. Sweep flocculation occurs with the addition of iron or aluminum, usually added as ferric sulfate or aluminum sulfate, which can easily dissolve into the Size: KB.
"The Bureau of Mines has been developing and evaluating methods for beneficiating the large deposits of nonmagnetic (oxidized) taconite located on the Western Mesabi Range. In this segment of the research, a sample representing about billion tons of nonmagnetic taconite from near Grand Rapids, Minnesota, was beneficiated using a reduction. Theory of Flocculation Reprint with Authorization by David L. Forbes Introduction The efficiency of most solid/liquid separation processes may be greatly improved by the application of synthetic polymeric flocculants. This improvement is achieved by bringing dispersed particles together, increasing the effective particle size of the solid Size: 52KB.
Detention times in flocculation basins are usually designed to provide for a. minutes b. minutes c. minutes d. minutes. Design contact times for flocculation range from 15 or 20 minutes to an hour or more, and flocculation requires careful attention to the mixing velocity and amount of mix energy. To prevent floc from tearing apart or shearing, the mixing velocity and energy are usually tapered off as the size of floc increases.
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Genre/Form: Government publications: Additional Physical Format: Online version: Jacobs, H.D. (Howard D.). Selective flocculation and flotation of a Mesabi Range hematitic-goethitic taconite. A sample was obtained of oxidized taconite from the western Mesabi Range in Minnesota, and the metallurgical response of the taconite to beneficiation by a process that included selective flocculation-desliming-cationic flotation was evaluated.
The sample contained pct iron and represented approximately 2 billion tons of crude material. Selective flocculation and flotation of a Mesabi Range hematitic-goethitic taconite / By H.
(Howard D.) Jacobs and joint author. (Arthur F.) Colombo. Abstract. Includes bibliographical references (p. 11).Mode of access: Internet Topics. minerals Article Selective Flocculation Separation of Fine Hematite from Quartz Using a Novel Grafted Copolymer Flocculant Jinxia Zhang 1, Weiguang Sun 1, Zhiyong Gao 2,* ID, Fusheng Niu 1, Long Wang 1, Yawei Zhao 1 and Yuesheng Gao 3,* ID 1 College of Mining Engineering, North China University of science and technology, TangshanChina; [email protected] (J.Z.); Cited by: 2.
In this work, a novel copolymer flocculant was synthesized by grafting starch and acrylamide, which for the first time, was employed in the flocculation separation of fine hematite from quartz.
Iron ore is one of the most important ores in the world. Over the past century, most mining of iron ore has been focused on magnetite (Fe3O4). As the name suggests, magnetite is magnetic in nature and is easily separated from gangue (unwanted) minerals through magnetic separation processes.
Unfortunately, the magnetite ore bodies are diminishing. Because of this, there has been a recent drive Cited by: 4. Selective flocculation of fines P. Somasundaran, V. Runkana Langmuir Center for Colloids and Interfaces, ColumbiaUniwrsity, New York.
NYlOO USA Abstract: A number of factors that affect selective fkJCcu1ation of fines have been identified and the effect of ~e of pa-rameters on p~ behavior has been explained with the help of a few case studies. Flotation and Flocculation deals with cutting-edge research in the science and engineering of two of the world’s key separation processes.
Flotation and flocculation underpin the key material supply chains for technologies that are central to minerals, fuel cells, ceramics, telecommunications, waste removal/recycling processes and many other File Size: 1MB.
The phenomenon of selective flocculation is well-known to mineral processing engineers and indeed, has been in industrial practice for a long time.
Flocculants can be either natural or synthetic. Natural flocculants are starches (e.g., tapioca flour, pearl starch, waxy milos), gums, resins etc.
These non-ionicCited by: 8. To participate in the Metallurgist Forums, be sure to JOIN & LOGIN Use Add New Topic to ask a New Question/Discussion about Flotation. OR Select a Topic that Interests you. Use Add Reply = to Reply/Participate in a Topic/Discussion (most frequent).
Using Add Reply allows you to Attach Images or PDF files and provide a more complete input. Use Add Comment = to comment on someone else’s. Flocculation I Flotation Flotation, using micro air bubbles, removes suspended solids as well as free oil, fat and grease. Emulsions of proteins, carbohydrates and fats can be transformed into removable flocs by means of coagulation (destabilisation) and flocculation (conglomeration of.
In the selective flocculation processing of a fine-grained hematite–quartz ore with starch, problems of coating, smearing and activation problems have been overcome by adding sodium silicate and potassium hydroxide first in the grinding circuit and also in the flocculation step (Frommer and Colombo, ).
At the high pHs (–) caused Cited by: 5. Selective flocculation Ponisseril Sornasundararr", Kalyan K Das* and Xiang Yu+ Selective flocculation is an important technique for processing fine and colloidal particulates during mineral separation, and for the manufacture of high performance ceramic and electronic materials.
FLOCCULATION AND FLOCCULATION FILTRATION Dieter Saal Darmstadt, Germany flocculant metering the flocculants cover a pH-range of the water to be cleaned. The • Flotation with and without filtration. These techniques will be given closer consideration in a later Size: KB. A sample was obtained of oxidized taconite from the Western Mesabi Range in Minnesota, and the metallurgical response of the taconite to beneficiation by a process that included selective flocculation-desliming-cationic flotation was evaluated.
The sample contained pct iron and represented approximately 2 billion tons of crude material. Study on the Characterisation and Processing of Iron Ore after Grinding by HPGR.
Cationic flotation o f Mesabi Range oxidized taconite, in In the selective flocculation of iron ore, a. Beneficiation of ultrafine mineral particles (typically with an average size less than 20 µm) remains a critical problem for the mineral processing industry.
Selective flocculation technique has been found to show great potential to tackle this problem, whose success mainly depends on the selective adsorption of a flocculant on the target mineral by: 2.
Selective flocculation of hematite in the hematite-quartz-ferric ion-polyacrylic acid system. Part 1, activation and deactivation of quartz. This investigation has shown that quartz can be activated for polyacrylic acid adsorption by hydrolyzing metal cations, similar to activation in flotation.
Sadowski, Z., and Laskowski, J. Selective Coagulation and Selective Flocculation of the Quartz-Carbonate Mineral (Calcite, Magnezite, Dolomite) Binary Suspensions. Google Scholar Cited by: 8.
Use the Flocculation and Sedimentation Protocol in your design. You should have at least 4 different samples that can range in dose from 0 mL to 5 mL of alum solution. You will need two additional measurements: turbidity and pH before and after the process.
A protocol for these measurements is also available. Size: KB. samples cover a range (e.g. pH = 5, 6, 7 and 8). The coagulant dose determined previously is added to each beaker.
Then follows stirring, flocculation and settlement as before. After this, the samples are examined and the optimum pH is determined. If necessary, a re-check of .Abstract. Coagulation and flocculation always involve solid-liquid separation processes.
Numerous studies on coagulation and flocculation for water and wastewater treatment have postulated sedimentation and/or filtration as the typical accompanying separation by: 5.This paper, a comprehensive analysis of selective flocculation am fine hematite selected based on the combination of soluble starch and the characteristics of acrylamide was prepared soluble starch - grafting of acrylamide polymer flocculant.
Conditions of single-factor experiment studied the conditions on the starch - the impact of acrylamide polymerization and to the level of starch graft Cited by: 1.