Enhanced recovery of low-grade iron ore by selective …
ABSTRACT. 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 …
اقرأ أكثر
(PDF) Selective flocculation and floc-flotation of iron
The purpose of this study was to determine the process water concentrations of the important ionic species in a selective flocculation–dispersion hematite ore concentrating plant while...
اقرأ أكثر
Studies on Performance Evaluation of Modified Polymer on Iron Ore …
The present investigation aims at detailed beneficiation of the low-grade goethitic ore of Gua iron ore mines from Jharkhand using selective flocculation process and modified starch as flocculant. The main purpose of this study is to determine the modified starch to be a novel flocculant for iron fines processing. Chemical composition …
اقرأ أكثر
Selective Flocculation of Iron Ore Slimes: Results of
A significant portion of currently mined iron ores, that is, 15–20% of run of mine ore, typically ends up as slimes—a slurry of fine particles (<45 micron) with relatively higher alumina contents (7–15% Al2O3). The only viable option currently is to dispose these slimes in tailing ponds for water recovery and future use. Due to increasing demand for …
اقرأ أكثر
Red mud is piling up. Can scientists figure out what to do with it?
One idea is to harness red mud, which is typically 40% to 70% iron oxide, to make iron-rich cements. The world uses more than 4 billion tons of cement per year, mostly as the binder in concrete. The most common version is Portland cement, made from calcium silicates that react with water to make create a tough, hard matrix.
اقرأ أكثر
Characterization and Beneficiation of Iron Ore Tailings by …
Washing of flocs and addition of dispersant improves the selective flocculation process. Washing of flocs shows a maximum improvement of 58.24–65.32 …
اقرأ أكثر
Comprehensive reutilization of iron in iron ore tailings
A large number of iron ore tailings (IOTs) are produced in steel industry, posing threat to the environment during its storage and disposal. To effectively reutilize Fe in IOTs, we propose a comprehensive utilization scheme: (1) most Fe in IOTs is extracted by concentrated hydrochloric acid to form FeCl 3 flocculants; (2) after separation from the …
اقرأ أكثر
Magnetic Separation of Impurities from Hydrometallurgy
The removal of iron ion from leaching solution is critical for the recovery of value metals, with the method of choice commonly being crystallization (precipitation). This paper summarized the new improvements in iron removal by precipitation methods in recent years and proposed a novel process, magnetic seeding and separation. The new …
اقرأ أكثر
Shear-Dependent Yield Stress of Iron Ore Fine Tailings in Two
Both shear and flocculation have a significant influence on the rheological behavior of tailings, especially the yield stress. In the two-step flocculation process, the above two kinds of actions exist at the same time, and they influence each other. In order to explore the change rule of the yield stress and its internal causes, a two-step …
اقرأ أكثر
Beneficiation of Synthetic Iron Ore Kaolinite Mixture
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 …
اقرأ أكثر
Flotation of Iron Ores: A Review
Flotation of Iron Ores: A Review. A tremendous amount of research has been done on refining the flotation process for iron ore and designing the reagents …
اقرأ أكثر
Beneficiation of Synthetic Iron Ore Kaolinite Mixture
flocculant dose on the selective flocculation of Indian hematitic iron ore slimes (synthetic mixture of high grade hematite, 68% Fe and kaolinite). Starch is a polysaccharide based natural
اقرأ أكثر
Banded Iron Formation to Blue Dust: Mineralogical and …
The supergene process causes the leaching of remnant silica from hydrothermally upgraded iron ore under a suitable Eh and pH condition and leads to the formation of Blue Dust. Major element ...
اقرأ أكثر
Rheological characterization and performance of flocculants in …
This study highlights the utilization of different flocculants in the settling of Iron Ore Tailings slurry (IOTs) in a tailings pond. Performances of different flocculants such as polyacrylamide, guar gum, and alstafloc are used to study the efficiency of the settling …
اقرأ أكثر
Plasma Processing of Iron Ore | IntechOpen
4.1 Plasma processing of blue dust. Blue dust is the purest form of iron oxide mineral (hematite) abundantly available in many states of India. For the present study, blue dust of Koira origin, Odisha, India, was collected, which is in fine form (150 μ). The chemical analysis of blue dust is given in Table 2.
اقرأ أكثر
Developments in the physiochemical separation of iron ore
After flocculation of the iron oxides, the silica that remained suspended could be removed by careful decantation (Frommer and Colombo, 1966, Frommer, ... The reverse cationic route is by far the most widely used iron ore flotation process. This process floats quartz with an ether amine collector at pH 10–10.5 using cornstarch to depress the ...
اقرأ أكثر
Can carboxymethyl cellulose be used as a selective flocculant for
In our previous communication, we had studied flocculation of iron ore slimes using guar gum, which is composed of galactose and mannose units. The backbone of guar gum is a linear chain of β-1,4-linked mannose units, while galactose residue is 1,6-linked at roughly every second mannose forming short branches (Jain et al., 2017).
اقرأ أكثر
Improving flocculation and dewatering performance of iron tailings
The performance of flocculation process is affected by flocculant (molecular weight, charge density and functionality) and slurry properties (particle size, surface charge, ... (containing 51% iron) is treated to produce 350–400 t/h concentrate with iron contents of 63%. The tailing of the iron ore beneficiation plant (containing 17% iron) at ...
اقرأ أكثر
Dephosphorization
From the viewpoint of technological process, there are three types of hot metal dephosphorization: Type I: Dephosphorization pretreatment and decarburization are completed in two converters, respectively, as shown in Fig. 6.59, for example, the SRP in the Wakayama Iron & Steel Works and the LD-ORP of Nagoya Iron & Steel Works.
اقرأ أكثر
Improving flocculation and dewatering performance of iron tailings
The hypothesis is the dewatering performance is affected by the process variables like flocculation dosage, slurry solids %, slurry pH and flocculant dilution (%). …
اقرأ أكثر
Improving recovery of iron using column flotation of iron ore …
In general, the industrial flowsheets for the beneficiation of itabirite iron ores from the Quadrilátero Ferrífero (Minas Gerais state) in Brazil involves grinding, desliming, …
اقرأ أكثر
Minerals | Free Full-Text | The Challenges and Prospects of
Flotation is a common mineral processing method used to upgrade copper sulfide ores; in this method, copper sulfide mineral particles are concentrated in froth, and associated gangue minerals are separated as tailings. However, a significant amount of copper is lost into tailings during the processing; therefore, tailings can be considered …
اقرأ أكثر
Recovery of Zinc and Iron from Steel Mill Dust—An Overview of …
As shown in Table 1, the total iron content of this dust is 23.4–35.6%, and the iron mainly exists in the form of magnetite. Its carbon content is 18.5–33.0%, which can reduce the amount of carbon used for fire recovery. The zinc content is 1.2–3.4%, and Zn mainly exists in the form of ZnO and ZnFe 2 O 4.
اقرأ أكثر
Comparison of selective flocculation of low grade goethitic …
The obtained results were analyzed; they indicate the enhancement of the iron ore grade from 58.49% to 67.52% using AP-g-PAA with a re- covery of 95.08%. In addition, 64.45% Fe with a recovery of ...
اقرأ أكثر
Characterization and Beneficiation of Iron Ore Tailings by …
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 …
اقرأ أكثر
Specific gravity values of three different iron ore slimes
We were able to produce a concentrate assaying 66.2% Fe and <2% Al with a yield of 67.4% by weight (with a recovery of 77% of iron values) using PVP (1 ppm dosage) and corn starch (20 ppm) for one ...
اقرأ أكثر
(PDF) Selective Dispersion-Flocculation of Alumina …
Selective Dispersion-Flocculation of Alumina Rich Iron Ore Samples. beena rai. In India, during mining and washing of iron ore large quantities of ultra-fines (slimes) are generated which amounts to 20% of the total iron …
اقرأ أكثر
Optimisation of selective flocculation of ultrafine iron ore
D. BagsterJ. Mcilvenny. Selective flocculation of iron oxide-kaolin mixtures using a modified polyacrylamide flocculant. S. Ravi ShankarPradipM. DeoR. A. KulkarniS. Gundiah. High molecular weight polyacrylamides were synthesized and successfully modified to contain up to 8·3% hydroxamate functional groups.
اقرأ أكثر
High performance polymeric aluminum silicate sulfate (PASS
PASS is an innovative inorganic polymer flocculant (IPF), which possesses the advantages of a polysilicate/aluminum sulfate-based flocculant. Recently, solid wastes rich in Si and Al, such as kaolinite, rice husks, and abandoned molecular sieves (AMS) have been recognized as promising raw materials for the synthesis of flocculants. The present …
اقرأ أكثر
(PDF) Iron Ore Tailings: Characterization and Applications
Iron ore tailings (IOT) are a form of solid waste produced in greater quantity in iron mining. The worldwide annual production of IOT is estimated at approximately 1.4 billion tons, mostly ...
اقرأ أكثر