selective flocculation iron ore

selective flocculation, haematite, magnetic separation, SLon-100. Introduction In iron ore production in South Africa a significant proportion of the feed is lost as slimes. Dworzanowski (2014) reports that South Africa''s major iron ore producer, Kumba Iron Ore''s Sishen mine, discards approximately 3 Mt/a of –200 μm material as tails.

 · mltmmltt ill ELSEVI ER Int. J. Miner. Process. 42 (1994) 191-213 Optimisation of selective flocculation of ultrafine iron ore P.K. Weissenborna, L.J. Warrenb''*, J.G. Dunna a School of Applied Chemistry, Curtin University of Technology (A.J. Parker Cooperative Research Centre for HydrometaUurgy), GPO Box UI 98Z Perth, W.A. 6001, Australia b CSIRO, Division of Mineral …

beneficiating the fines, slimes and tailing by selective flocculation, which is defined as the selective agglomeration of iron ore particles using flocculant. In the present study an attempt has been taken to study the applicability of selective flocculation to Indian iron ore using corn starch as flocculant.

Selective flocculation separation of fine hematite from quartz using a novel grafted copolymer flocculant ... The growing demand for steel and the depletion of high quality iron ores have boosted the ... In 1975, Tilden Iron Ore mine, MI, USA, applied

 · The sample contained 35.3 pct iron and represented approximately 2 billion tons of crude material. Selective flocculation and flotation were evaluated in a pilot plant with a feed rate of 900 lb/hr. Concentrates averaging 61. 7 pct iron and 5.1 pct silica were obtained, with an accompanying iron recovery of 67.2 pct.

This study aims to beneficiate low grade goethitic iron ore fines using a selective flocculation process. Selective flocculation studies were conducted using different polymers such as starch amylopectin (AP), poly acrylic acid (PAA), and a graft copolymer (AP-g-PAA). The obtained results were analyzed; they indicate the enhancement of the iron ore grade from 58.49% to 67.52% using AP-g-PAA ...

 · Flocculation and Filtration. The use of starches as flocculants was investigated in three different areas: the flocculation of an iron oxide slime, the selective flocculation and partial upgrading of a ground oxidized taconite crude, and clarification tests on …

 · Rapid depletion of high grade ores, need for resource conservation and, the increasing demand for steel in India are driving the iron ore industry towards finding appropriate strategies for the beneficiation and utilization of alumina rich iron ore slimes. Selective dispersion-flocculation is a commercially proven technology option for the ...

Beneficiation of low-grade iron ore was carried out by selective flocculation process using different flocculants, namely starch amylopectin (AP) and grafted copolymer of amylopectin (GAP). The iron ore used in the investigation contained 56.98% Fe, 5.45% Al 2 O 3, and 4.22% SiO 2. Flocculant dosage, number of floc washing, and pH were ...

flocculation selective. li1corporation of xanthate groups into cellulose has, for example, enabled Attia and Kitchener (1975) to obtain selective floccu-lation of copper minerals from a copper ore. Similarly modification of starches for selective flocculation of hematite from low-gl''ade iron ore and

424 S A Ravi Shankar et al of selective flocculation of ore slimes has been carried out on the separation of iron minerals from quartz using starches (Gururaj et al 1983; Hanumantha Rao et al 1985a; Hanumantha Rao and Narasimhan 1985; Sresty et al 1978) and polyacryl- amides (Drzymala and Fuerstenau 1981, 1986; Gebhardt and Fuerstenau 1986).

 · International Journal of Mineral Processing, 14 (1985) 67--75 67 Elsevier Science Publishers B.V., Amsterdam -- Printed in The Netherlands SELECTIVE FLOCCULATION APPLIED TO BARSUAN IRON ORE TAILINGS K. HANUMANTHA RAO and K.S. NARASIMHAN Regional Research Laboratory, Council of Scientific and Industrial Research, Bhubaneswar- 751 013, Orissa (India) …

Hematite and magnetite are the two main minerals in China''s numerous iron ore sources. As easily processed mineral resources become depleted, iron ores that are low-grade, fine or mixed, and generally difficult to separate have become our current focus of research and exploitation [1,2].This includes ultrafine disseminated iron ores [], where the target minerals are largely disseminated at a ...

 · This study aims to beneficiate low grade goethitic iron ore fines using a selective flocculation process. Selective flocculation studies were conducted using different polymers such as starch amylopectin (AP), poly acrylic acid (PAA), and a graft copolymer (AP-g-PAA). The obtained results were analyzed; they indicate the enhancement of the iron ore grade from 58.49% to 67.52% using …

An iron ore is finely ground and slurried prior to being subjected to treatment with a selective flocculant for iron values. Subsequent to treatment, the iron values are allowed to settle into the underflow concentrate and be recovered. The selective flocculant employed is a hydroxymethylated polyacrylamide having a high molecular weight and a degree of hydroxymethylation in excess of about 50%.

The recovery of fine hematite particles from banded hematite quartzite (BHQ) ore with potato starch has been investigated using selective flocculation. Microscopic features, coupled with x-ray diffraction (XRD), and Fourier trans- forms infrared (FTIR) spectroscopic data provide evidences for adsorption of starch molecules on hematite surface. The starch molecules show good selectivity for ...

 · The presence of calcium ions (and presumably magnesium ions) hindered selective adsorption Table 5 Grade and recovery results for the selective flocculation of ultrafine iron ore using various starches and standard test conditions Type of starch Grade (% iron) Recovery (%) arrowroot 56.5 35 corn 54.8 57 pearl 57.5 33 potato 53.9 42 tapioca 52.6 ...

 · In the present paper, an attempt has been made to beneficiate iron ore tailings by selective flocculation using guar gum and starch as flocculants along with sodium hexametaphosphate (SHMP) as the dispersant. The mineralogical studies carried out initially indicated the presence of hematite and goethite as major iron bearing mineral phases along with quartz and kaolinite as major …

goethite and quartz, less clay minerals, and minor magnetite and todorokite. Selective flocculation is one of the methods that can be applied for the separation of fine class iron minerals from impurities and depends on the individual components of the sludge and their behaviour.

In 1975, Tilden Iron Ore mine, MI, USA, applied corn starch to the selective flocculation of fine hematite for the first time. Since then, numerous reports have focused on this topic. Yang et al. [ 12 ] attempted to inhibit hematite floatability with corn starch, aiming to disclose the effect of starch solubility on the flocculation-flotation ...

 · In this paper, we report on the adsorption of starch onto hematite, in relation to its proved application as a selective flocculant for ultrafine iron ore [ 1]. Starch is a complex natural polysaccharide con- sisting of two components -- amylose and amylo- pectin.

 · Effective selective flocculation and desliming is a most attractive and widely sought technique for treating finely ground ore pulps because such a treatment would enable separation of the valuable ore slime from the gangue slime by the preferential settling of one and decantation of the other.

 · The consequences ofmicrobe–mineral interactions of relevance in mineral beneficiation are brought out in terms of iron ore flotation and selective flocculation. Paenibacillus polymyxa [ 13] is a Gram-positive neutrophilic, periflagellated heterotroph, occurring indigenously associated with several mineral deposits.

 · COLLOIDS A AND Colloids and Surfaces SURFACES ELSEVIER A: Physicochemical and Engineering Aspects 99 (1995) 29-43 Selective flocculation of ultrafine iron ore 2. Mechanism of selective flocculation P.K. Weissenborn a,1, L.J. Warren b,., J.G, Dunn a a School of Applied Chemistry, Curtin University of Technology, GPO Box U1987, Perth, W.A. 6001 ...

selective flocculation technique to treat fines and slimes generated during mining and processing of the ore. Similarly, the process to recover iron values from the banded iron ore formation (BIF)—banded hematite quartzite (BHQ), banded hematite jasper (BHJ) and banded magnetite quartzite (BMQ)—are yet to be explored due to the fine na-

Process for selective flocculation of hematitic iron ores in the presence of non-ferrous minerals ... Example 1 was repeated in all essential details except that the slurry contained only 85 grams of the iron ore of Example 1 and the dosage levels of flocculants were varied from those of Example 1. Dosage levels and analyses for solids and iron ...

The present work is focused on the development of a novel flocculant for selective flocculation of iron ore using functionalized β‐cyclodextrin (β CD). β CD has been modified by esterification reaction with methacrylic anhydride (MAh) to form β CD methacrylate (CD‐Meth).

[RI18867 PLEASE DO Nor REMOVE FRCM LIBRARY Bureau of Mines Report of Investigations/1984 Dispersion-Se"lective Flocculation-Desliming Characteristics of Oxidized Taconites By …

"The beneficiation of iron ore slimes by selective flocculation was studied. Polyacrylamide (PAM) and guar gum were used as flocculant, along with sodium hexametaphosphate (SHMP) as a dispersant. The samples collected were initially subjected for chemical and mineralogical studies.

Process for clarifying iron ore slimes: 1979-01-30: Coscia: 210/54C: 4090955: Selective flocculation of minerals from a mixture or an ore: 1978-05-23: Dexter: 209/5: 4081357: Process for selective flocculation of hematitic iron ores in the presence of non-ferrous minerals: 1978-03-28: Werneke: 209/5: 3975496: Process for settling red mud in the ...

 · At present, there are only two known commercial applications for selective flocculation in North America. Selective flocculation was induced by the preferential absorption of a small amount of causticized starch on the iron oxides. Sodium hydroxide was added to bring the pH to 10.5 to 11, and sodium silicate was used as a dispersant.

 · For selective flocculation tests, 5 % pulp density was prepared with the addition of 75 g of iron ore slimes and ∼1480 mL of tap water into 2000 mL flotation cell (CDC, model CFB-1000 EEPN). Thereafter, sodium metasilicate (50 g/ton) was introduced and the pH was adjusted to the desired value (7 or 10.5) and conditioned for 10 min at cell ...

Indian iron ore mining industry disposes large amount of ultra fines containing high gangue minerals, thereby lead to loss of iron values and environmental pollution. Selective flocculation studies have been thought of for beneficiation of ultra fines. Response of different types of starches to iron ore ultra fines generated by the hydro ...

 · A single process, known as selective flocculation and dispersion, has been successfully implemented at a plant scale for the beneficiation of fine liberation size hematite ore. Very little is known about this process as it was discovered by the U.S. Bureau of Mines by accident. The process is driven by water chemistry and surface chemistry ...

• Selective Flocculation Although not commonly used, selective flocculation has been successfully piloted at SGS Minerals Services to remove silicate minerals from iron ores. HYDROMETALLURGY Hydrometallurgy is concerned with the principles and practice of the aqueous extraction of metals from natural or recycled resources and their subsequent

Increased demand for iron ore necessitates the utilization of low-grade iron ore fines, slimes, and existing tailings. Selective flocculation can be an alternative physico-chemical process for utilizing these low-grade fines, slimes, and tailings. In selective flocculation, the most critical objective is the selection of proper reagents that will make floc of desired minerals.