Beneficiation of iron ore slimes s d ruche and m s prakasa rao introduction national mineral development corporation nmdc is a premier mining organisation in the field of iron ore mining in india the activities of nmdc for the last 25 years broadly relate to. Efforts have been made to recover iron values from slimes as enumerated by the works of ibm 2, rao 3, chakravarthy et. Beneficiation of iron ore slime using hydrocyclone onemine mining and minerals library search results. The iron ore sample used in this research was obtained from donganshan iron ore mine located in liaoning province, china. The characteristics of iron ore slimes and their in. Iron making by blast furnace utilises different kinds of iron ore products as a feed such as lump as a feed directly and sinterpellet which are the agglomerates of iron ore fines, both containing less than 2% alu mina. The stet technology is presented as an alternative to beneficiate fe ore fines that could not b e successfully treated via traditional flowsheet circuits due to their granulometry and mineralogy. Iron ore beneficiation by the ferrous wheel magnetic separato. Recovery of iron values from slimes and dewatering of the.
A beneficiation study on a low grade iron ore by gravity. Jan 01, 2015 recovery of iron values from the barsua iron ore slimes containing 56% fe, 4. Interactive effect of minerals in the flotation of complex ores. These slimes need processing as they cannot be used directly in blast furnaces. Maximizing haematite recovery within a fine and wide particle. Recovery of iron minerals from indian iron ore slimes. Compared with other existed technologies, froth flotation did. Dry processing of iron ore presents an opportunity to eliminate costs and wet tailings generation associated with flotation and wet magnetic separation circuits. The adapted beneficiation methods of an iron ore depend on the nature of the. High intensity magnetic separation of iron ore slime and. Stet has evaluated several iron ore tailings and run of mine ore samples at bench scale prefeasibility scale. Table i provides a summary of the processes commonly used for various size. Building a geometallurgical model in iron ores using a min. With the technological improvements and innovations, nowadays the 100.
Process alternatives to recover highgrade iron ore. Also, it is equally difficult to know the characteristic properties of the particles where most of the population is below 50 micron. This fraction can vary in particle size from 200 m down to 10 m. Pdf an overview of the beneficiation of iron ores via reverse. In addition to this, depletion of high grade iron ore, stringent environmental regulations involved in opening of new mines, problems involved in handling, disposal of tailings slimes, and utilizing of iron ore at 45% fe as a cutoff fixed by indian bureau of mines, it is the need of hour to effectively beneficiate low grade iron ore. Iron ore production in this size range is almost exclusively based on haematite. Flotation is the most effective solution, both technological ly and. The activities of nmdc for the last 25 years broadly relate to explore, develop and exploit mineral. Treatment of iron ore slime for value addition sciencedirect. Maximizing the recovery of fine iron ore using magnetic separation most iron ore operations that require beneficiation of rom ore to produce lump, fine sinter, and pelletizing concentrate iron ore products will discard a slimes fraction to final tailings. Pdf beneficiation techniques for iron ores from eastern.
Pgm upgrading as well as manganese recovery from slimes dams. In the present investigation, typical iron ore slime sample containing 59. Pdf beneficiation of indian high alumina iron ore fines a. Finally, an iron ore concentrate assaying a fe grade of 62. Aug 25, 2018 in this paper, a sample from tangezagh iron mine was characterized by gravity and magnetic separation methods. The results indicated that spiral separation yields higher separation efficiency than others. Beneficiation of iron ore national institute of technology. Reprocessing of iron ore beneficiation plant tails by irjet. Open access recovery improvement of fine iron ore particles. Reverse flotation studies on an indian low grade iron ore slimes. National mineral development corporation nmdc is a premier mining organisation in the field of iron ore mining in india. Characterization and beneficiation of dry iron ore. Recovery of iron values from the barsua iron ore slimes containing 56% fe, 4.
Existing and new processes for beneficiation of indian iron ores. A preliminary investigation into separating performance and. All these earlier works indicates that beneficiation of iron ore slimes containing significant amount of fe along with sio2. The results from the reference research work had showed that the application of beneficiation process for the iron ore slime in india may lead to the sustainable growth of iron ore industries and it has also opened up answers for several questions regarding waste utilization and disposal strategies. Hematite and magnetite are the most prominent of the iron ores found in india.
Pdf dry magnetic separation of iron ore of the bakchar. Industrial applications of magnetic methods of material treatment. Abstractduring production of calibrated sized ore, more than 50 % of the generated fines and rejects slimes cannot be directly utilised in iron making due to its unfavourable granulometry, low iron content, high alumina and silica content. Approximately 1020 % of the process plant input is discarded as slimes into slime pondstailing dams.
Dense medium separation dms and gravity concentration are the beneficiation processes used. The magnetic fraction may be valuable or gangue depending upon its end use in a particular. Magnetic seeding depression in flotation of hematite ore slimes. Beneficiation of indian high alumina iron ore fines a case. Recovery of iron minerals from indian iron ore slimes using. Enhancement of pentlandite surface magnetism and implications for. Interactive effect of minerals on complex ore flotation international. Flotation, on the other hand, is used to reduce the content of. Khosla, 1993 beneficiation studies on alumina rich indian iron ore slimes using selective flocculation and flotation. Iron is essential to steel manufacturing and therefore an.
The matrix is the agglomeration carrier of magnetic mineral. Iron ore beneficiation pdf iron ore crushing plant iron ore. Csirinstitute of minerals and materials technology. Fine particle processing of iron ore slimes from wash plant. Recovery of iron values from iron ore slimes of donimalai. In the present work, extensive test work conducted by indian laboratories on beneficiation of slime has revealed that significant amount of iron values could be recovered from the slimes. Maximizing haematite recovery within a fine and wide. A study was initiated in 2005 to investigate processes to beneficiate these slimes to saleable products prompted by the current high demand for iron ore products and the high grade in the sishen.
Beneficiation of highalumina bearing ironore slime. Beneficiation of synthetic iron ore kaolinite mixture using. Roasting of a lowgrade goethite ore using horse residue and. Development of a geometallurgical framework for iron ores diva. This paper deals in brief to use of available methodologies for beneficiation of iron ore in indian context. Pdf an approach for recovery of iron values from slimes.
Us3337328a us376338a us37633864a us3337328a us 3337328 a us3337328 a us 3337328a us 376338 a us376338 a us 376338a us 37633864 a us37633864 a us 37633864a us 3337328 a us3337328 a us 3337328a authority us united states prior art keywords concentrate iron separation ore silica prior art date 19640619 legal status the legal status is an assumption and is not a legal. Iron ore beneficiation pdf iron ore crushing plant iron. Hematite is weakly magnetic, but it has a variety called magnetite. The beneficiation of iron ore fines and slimes has not only received attention in. Iron ore pelletization technology and its environmental.
National metallurgical laboratory is engaged in developing strategies for beneficiating iron ore slimes and during one such beneficiation studies, the slimes were processed through gravity and magnetic methods of separation. A beneficiation study on a low grade iron ore by gravity and. It is found that by onestage grinding, followed by hydrocycloning and magnetic separation by wet high intensity magnetic separator whims can produce desired. Roasting of a lowgrade goethite ore using horse residue. Detailed characterization followed by beneficiation of lowgrade iron ore slime from jilling langalota deposit, india, was studied. Beneficiation studies on aluminarich indian iron ore slimes. Roy introduction magnetic separation is one of the physical concentration processes that utilizes the differences in magnetic properties of various minerals present in the ore body. The mineralogical studies showed that hematite and goethite are the main iron bearing minerals with insignificant amounts of feo. This additional requirement of iron ore will need beneficiation of low grade ore fines to get the major portion of increased demand. Maximizing the recovery of fine iron ore using magnetic. Feed material the iron ore fines sample was collected from the spiral classifier overflow of a typical iron ore beneficiation plant of noamundi, india. Pdf an overview of the beneficiation of iron ores via. Iron ore beneficiation plant, bmm ispat, hospet, karnataka.
Beneficiation of synthetic iron ore kaolinite mixture. Get details key points downstream beneficiation case. The following diagram demonstrates some typical flowsheet designs for iron ore beneficiation of hard rock and friable ores. A number of magnetic separation processes are used to study preparability of two main hematitemagnetite and magnetitemuscovite ore types extacted it the abagas iron ore deposit. Beneficiation of an iron ore fines by magnetization. Magnetic beneficiation of magnesite ores by enhancing. Introductionthe consumption of iron ore has increased rapidly over the past decade due to the tremendous growth of iron and steel industry. The activities of nmdc for the last 25 years broadly relate to. Most of the iron ore mines produce hematite ores and have washing plants to produce lumps as well as fines. Separation of chromite from serpentine in fine sizes using magnetic carrier. Magnetic separator vphgms investigators on desliming of iron ore slimes. The iron ore sample was characterized using chemical analysis and xrd, and the results are shown in table 1 and fig. Hematite ore slimes collected from an iron ore mine in gansu province, china, assaying 43.
Pdf recovery of valuables from lowgrade iron ore slime and. International journal of mining science and technology, 22 6 2012, pp. During beneficiation iron ore slimes are generated and discarded as waste material to the slimes dams. Reprocessing of iron ore beneficiation plant tails by. Iron ore slime is which has the particle size of below 150 m is being discarded as waste during the mining and processing stages iron ore and it will be stored at the tailing dam. Magnetic seeding depression in flotation of hematite ore. Results and discussion owing to coarse granulometry and major amount of the experimental comprises of characterization studies of four different iron ore slimes samples followed by the effect of desliming and other machine parameters of vphgms for one sample. Nov 10, 2017 the iron ore sample used in this research was obtained from donganshan iron ore mine located in liaoning province, china. In western australia, batac jig in combination with spirals are being employed for the beneficiation of iron.
Beneficiation of an iron ore fines by magnetization roasting. High intensity magnetic separation of iron ore slime and its. Further closing down iron ore mines due to environmental constraints spurred the iron ore washing plants to recover the values from their slimy tail pond. Slime processing, therefore, may open up a great opportunity for utilisation of these slimes that are primarily waste material at present. Beneficiation of indian high alumina iron ore fines a case study. A typical highalumina containing iron ore slime from the eastern indian sector containing 58. The combination of spiral and multi gravity methods showed.
Applications include heavy minerals, ilmenite, manganese and iron ore haematite beneficiation. Iron ore mining and processing is no exception and. Earlier work with iron ore and iron ore fine slime indicates that beneficiation of iron ore and fine slime containing very low iron and high alumina and silica is quite difficult. The inclusion of medium intensity magnetic drum separation mims in combination with jigging may be considered for the beneficiation of the 61mm fraction of some friable ore bodies. The magnetic fraction may be valuable or gangue depending upon its end use in. Flotation is the most effective solution, both technologically and. Pradhan and others published biobeneficiation of iron ore slime find, read and cite all the research you need on researchgate. The work involved separating the gangue minerals viz.
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