scholarly journals Integrated study on obtaining oxide pellets from brown iron ore

2021 ◽  
Vol 1 (7) ◽  
pp. 55-68
Author(s):  
Iurii N. Lopatin ◽  
◽  
Anton A. Mushketov ◽  
Elena G. Dmitrieva ◽  
◽  
...  
Keyword(s):  
Mass Fraction ◽  
Iron Ore ◽  
Raw Materials ◽  
Mineral Concentration ◽  
Separation Processes ◽  
Iron And Steel ◽  
Iron Concentrate ◽  
Oxidized Pellets ◽  
Weakly Magnetic ◽  
Magnetizing Roasting

Introduction. Currently, the main raw materials for the production of cast iron and steel at metallurgical plants are iron concentrates obtained from magnetite (ferrous) quartzites, titanium-magnetite, and skarn ores. The existing technologies for processing these types of ores, which mainly include separation processes based on magnetic properties, size, separating of equally falling grains, and surface wettability allow us to produce both ordinary iron concentrates and high quality ones. The use of such schemes in the processing of brown iron ore does not allow obtaining high rates of mineral concentration. One of the methods for processing this type of ore is a roasting-magnetic scheme, which allows converting weakly magnetic (non-magnetic) forms of iron into strongly magnetic ones. Research objective is to develop the mode of magnetizing roasting of brown iron ore, technology of concentrating of the burn-out product in order to obtain iron concentrate and oxide pellets. Methods of research. The duration of heat treatment of the charge consisting of iron ore from the Abail deposit and coal from the Ekibastuz deposit and the required mass fraction of solid carbon contained in the coal are determined. Technological studies of the roasted product were carried out in order to obtain a concentrate with a mass fraction of iron at least 67%. According to the developed technology, a batch of iron concentrate was developed in order to obtain and study raw and oxide pellets. Results. The modes of magnetizing roasting of brown iron ore from the Abail deposit and cooling of the roasted material have been developed. A scheme for mineral processing of the roasted material has been developed in order to obtain a concentrate with at least 67% of iron mass fraction. The process of obtaining strong raw and roasted pellets from iron concentrate is studied. Conclusions. The developed mode of magnetizing roasting of the charge consisting of coal and ore from the Abail deposit makes it possible to obtain a roasted product with a degree of magnetization of 93%. The using of desliming of the roasted product makes it possible to remove magnetic floccules from the processing that reduce the concentrate quality, and to obtain a concentrate with a mass fraction of iron of at least 67% in the last stage of magnetic separation. From the iron concentrate, it is possible to obtain oxidized pellets with a strength of at least 200 kg/pellet at temperature of pellets firing of 1325 °C.

Research on the Magnetizing Roasting and Magnetic Separation of Blast Sludge

2014 ◽  
Vol 644-650 ◽  
pp. 5451-5454
Author(s):  
Xu Bai ◽  
Shu Ming Wen ◽  
Shao Jun Bai ◽  
Chao Lv ◽  
Peng Xiang Zhang
Keyword(s):  
Experimental Study ◽  
Blast Furnace ◽  
Iron Ore ◽  
Raw Materials ◽  
Optimum Conditions ◽  
High Iron Content ◽  
Magnetic Current ◽  
Blast Furnace Production ◽  
Magnetizing Roasting ◽  
Roasting Time

In the blast furnace production process, the high iron content in the sludge produced by collecting, Iron can be used as recycled raw materials. Experimental study found that the use of magnetic roasting - weak magnetic iron powder method of recovering technology is feasible. The optimum conditions are: the grinding fineness is 87%, calcination temperature is 750 °C, roasting time is 25min, magnetic current is 1.5A under conditions to obtain a grade of 59% recovery rate of 79.3% iron ore .

scholarly journals Technological research on converting iron ore tailings into a marketable product

2021 ◽  
Vol 121 (5) ◽  
Author(s):  
I. Mitov ◽  
A. Stoilova ◽  
B. Yordanov ◽  
D. Krastev
Keyword(s):  
Magnetic Separation ◽  
Iron Ore ◽  
Zinc Content ◽  
Mass Yield ◽  
Iron Recovery ◽  
Flotation Process ◽  
Iron Concentrate ◽  
Iron Ore Tailings ◽  
Lead And Zinc ◽  
Magnetizing Roasting

SYNOPSIS We present three technological scenarios for the recovery of valuable components from gangue, stored in the tailings dam at Kremikovtzi metallurgical plant in Bulgaria, into marketable iron-containing pellets. In the first approach the iron concentrate was recovered through a two-stage flotation process, desliming, and magnetic separation. In the second proposed process, the iron concentrate was subjected to four sequential stages of magnetic separation coupled with selective magnetic flocculation. The third route entails the not very common practice of magnetizing roasting, followed by selective magnetic flocculation, desliming, and magnetic separation. The iron concentrate was pelletized in a laboratory-scale pelletizer. Each technology has been assessed with regard to the mass yield of iron concentrate, the iron recovery. and the iron, lead, and zinc content in order to identify the most effective route. Keywords: tailings reprocessing, magnetizing roasting, pelletization.

scholarly journals Technological research to produce standard concentrate from iron ore containing sulfur

2018 ◽  
pp. 58-62
Author(s):  
Sugir-Erdene N ◽  
Baasanjav D ◽  
Orgilbayar B ◽  
Sukhbat S ◽  
Nyamdavaa B ◽  
...  
Keyword(s):  
Iron Ore ◽  
Raw Materials ◽  
Experimental Studies ◽  
Iron Concentrate ◽  
Purity Iron ◽  
Magnetic Enrichment ◽  
High Purity Iron ◽  
Flotation Method ◽  
Low Sulfur Content ◽  
Low Sulfur

Experimental studies were carried out in order to extract and obtain iron ore with low sulfur content that meets the standard requirements of metallurgical raw materials by enriching the Magnetite ore of the Tumurtei deposit by electromagnetic gyratory separator in dry, wet and with the flotation method. Primary ores were conducted -3 mm crushed , the dry magnetic enrichment procedure of coil was at 2.5A, and the roller was 125 round/min velocity, Also the appropriate technological procedures of extracting standard concentrates were determined when the wet magnetic processing procedure was conducted and the current of coil was at 5-25A, and the grinding period was 10-60 minutes, or when the classification content of -0.074 mm were 50-85 percent and the extracted concentrate was completed by flotation method. It was identified that high purity iron concentrate that meets the metallurgical requirements can be extracted by reducing sulfur which is a toxic mixture by dry and wet magnetic enrichment procedures and the combined flotation scheme. Хүхэр агуулсан төмрийн хүдрээс стандартын баяжмал гарган авах технологийн судалгаа Хураангуй: Төмөртэйн ордын магнетитын хүдрийг хуурай, нойтон соронзон болон флотацийн аргаар баяжуулж, металлургийн үйлдвэрийн түүхий эдийн стандартын шаардлага хангасан хүхрийн агуулга багатай төмрийн баяжмал гарган авлаа. Анхдагч хүдрийг (-3 мм) ширхэглэлтэйгээр бутлан хуурай соронзон баяжуулалтыг гүйдлийн хүч 2.5 A, булны эргэлтийн хурд 125 эрг/мин, нойтон соронзон баяжуулалтыг нунтаглалтын хугацаа 10-60 мин, гүйдлийн хүч 5-25 A, 0.074 мм-ийн ангилал 50-85% агуулсан стандарт баяжмал гарган авах технологийн зохистой горимуудыг тогтоож гарсан баяжмалыг флотацийн аргаар гүйцээн баяжуулав. Туршилт судалгааны үр дүнд 42.03%-ийн төмөр, 2.87%-ийн хүхэр агуулсан анхдагч хүдрээс 68%-ийн төмөр, 0.2%-ийн хүхэр агуулсан, 90.89%-ийн металл авалттай төмрийн баяжмалыг гарган авав. Иймд хуурай, нойтон соронзон баяжуулалт, флотацийн хосолсон схемээр төмрийн хүдрийн хорт хольц болох хүхрийг бууруулснаар цаашид металлургийн үйлдвэрийн шаардлага хангасан өндөр цэвэршилтэй төмрийн баяжмалыг ялган авах боломжтой юм. Түлхүүр үг: магнетит, төмрийн баяжмал, хүхэр, баяжуулалт, флотаци

Study on Direct Reduction Process of Cylindrical Briquetting Hematite

2020 ◽  
Vol 988 ◽  
pp. 36-41
Author(s):  
Andinnie Juniarsih ◽  
Anistasia Milandia ◽  
Actur Saktianto ◽  
Suryana
Keyword(s):  
Heat Transfer ◽  
Heat Transfer Rate ◽  
Transfer Rate ◽  
Iron Ore ◽  
Raw Materials ◽  
Direct Reduction ◽  
Reduction Process ◽  
Iron And Steel ◽  
Direct Reduction Process ◽  
Rate Study

There are two types of iron resources such as primary iron ore and iron sand. In general, primary iron ores use as raw materials in iron and steel making and can reduce directly. In Direct reduction process, Fe2O3 (hematite) is converted to metallic iron by the removal of oxygen. This work presents a heat transfer rate study for direct reduction process of iron ore cylindrical briquette. An investigation has been carried out of different reduction parameter such as different sizes cylindrical geometry over temperatures ranging from 700°C to 1100°C for reaction time from 10 minutes to 1 hour. The result was indicated that the value of the heat transfer rate decreases in the core and outer parts of the cylinder briquettes.

scholarly journals SLon Magnetic Separator Applied to Upgrading the Iron Concentrate

2003 ◽  
Vol 12 (2) ◽  
pp. 63-69 ◽  
Author(s):  
Xiong Dahe
Keyword(s):  
Historical Record ◽  
Processing Plant ◽  
Magnetic Separator ◽  
Iron And Steel ◽  
Iron Concentrate ◽  
Oxidized Iron ◽  
Weakly Magnetic ◽  
Concentrate Grade ◽  
Set Up ◽  
New Generation

SLon vertical ring and pulsating high gradient magnetic separator is a new generation of a highly efficient equipment for processing weakly magnetic minerals[1–3]. It possesses advantages of a large beneficiation ratio, high recovery, a matrix that cannot easily be blocked and excellent performance. In the technical reform of upgrading the iron concentrate in Qi Dashan Mineral Processing Plant of Anshan Iron and Steel Company in 2001 to 2002, ten SLon-1750 magnetic separators were successfully applied to process oxidized iron ores. The iron concentrate of the plant was upgraded from 63.22% Fe to 67.11% Fe. The overall results of the reformed flowsheet are: the feed grade 29.84% Fe, the iron concentrate grade 67.11% Fe, the tailings grade 11.27% Fe, and the iron recovery 74.79%, which set up a new historical record of the plant.

scholarly journals Preparation and Properties of Agricultural Residuals-Iron Concentrate Pellets

2017 ◽  
Vol 2017 ◽  
pp. 1-7
Author(s):  
Zhulin Liu ◽  
Xuegong Bi ◽  
Zeping Gao ◽  
Yayu Wang
Keyword(s):  
Particle Size ◽  
Compressive Strength ◽  
Blast Furnace ◽  
Iron Ore ◽  
Raw Materials ◽  
Experimental Results ◽  
Molar Ratio ◽  
Reduction Temperature ◽  
Iron Concentrate ◽  
Reduction Of Iron

In this paper, carbon-containing pellets were prepared by using crop-derived charcoal made from agricultural residuals and iron ore concentrates, and their pelletizing performance and properties were studied. Experimental results showed that the strengths of pellets were related to the particle size of concentrates and the content of moisture, bentonite, and crop-derived charcoal fines in the pelletizing mixture and the temperature of roasting and reduction. That the granularity of raw materials was fine and the bentonite content increased was beneficial to the improvement of pellet strengths. The suitable molar ratio of carbon to oxygen was 1.0 and the proper proportioning ratios of moisture and binder were 8.0% and 6.5%, respectively. The pellet strengths increased accordingly with increasing the reduction temperature, and when the temperature reached 1200°C, accompanied by the fast reduction of iron and the formation of crystal stock, the dropping strength of product pellets was 15 times and the compressive strength was 1650 N; this may be improved by grinding of the concentrate, leading to acceptable strength for the blast furnace.

Analysis of iron ores by ICP-AES

2021 ◽  
Vol 87 (6) ◽  
pp. 20-24
Author(s):  
T. A. Karimova ◽  
G. L. Buchbinder ◽  
N. Romanov ◽  
S. V. Kachin
Keyword(s):  
Inductively Coupled Plasma ◽  
Mass Fraction ◽  
Iron Ore ◽  
Raw Materials ◽  
Atomic Emission ◽  
Emission Spectrometry ◽  
Plasma Atomic Emission Spectrometry ◽  
Iron Line ◽  
Inductively Coupled ◽  
Line Intensities

A method for the analysis of iron ore raw materials (IORM) using inductively coupled plasma atomic- emission spectrometry (ICP-AES) and Concentration Ratio Calibration (CRC) has been developed. However, the general eq. for calibration by concentration ratios used in analysis of metals and alloys was modified with allowance for the IORM characteristics: all the elements, except sulfur, were represented as oxides, iron was represented as FeO and Fe2O3, and the total of 100% included ignition losses (LOI). A variant of solving the equation is proposed, which allowed us to relate the relative concentrations of the components (the ratios of the mass fraction of the determined components to the mass fraction of iron oxide) to the ratio of the line intensities of the certain element and iron line measured on a spectrometer. The equation takes into account the content of FeO and LOI, which are determined by standard methods of analysis. A method for acid decomposition of the samples in autoclaves heated in a HotBlock 200 system is proposed: a sample weight of 0.25 g was decomposed in closed vessels at a temperature of 150 – 180°C in the mixture of HCl, HF and HNO3. The following components were determined in concentrates and pellets: Fe2O3, Fetot, Al2O3, CaO, Cr2O3, K2O, MgO, MnO, Na2O, P2O5, SiO2, TiO2, Co, Cu, Mo, Ni, Pb, S, V, Zn. The correctness of the developed method is confirmed by the analysis of SS of iron ore and iron concentrates, as well as by comparison with the results obtained by standardized methods. The proposed technique provides iron determination in iron ore raw materials with an accuracy no worse than that specified in GOST 23581, all other components are determined in a wider range of contents and with a higher accuracy.

scholarly journals Environmental Resource - Economized Processes of Recycling Mineral Raw Materials of Complex Composition

2015 ◽  
Vol 1 ◽  
pp. 209
Author(s):  
V. A. Vinnikov ◽  
M. G. Silberschmidt ◽  
V. A. Bocharov ◽  
V. A. Ignatkina ◽  
T. N. Gzogyan
Keyword(s):  
Raw Materials ◽  
Zinc Sulphide ◽  
Operating Conditions ◽  
New Combination ◽  
Mineral Concentration ◽  
Complex Composition ◽  
Iron Concentrate ◽  
Mineral Substances ◽  
The Individual ◽  
Ferruginous Quartzites

The results of the studies on the justification of technological processes providing recycling of the warehoused ferruginous quartzites of complex composition and waste non-ferrous metals allowing to receive additional commodity products are given. The example of amphibole and biotite varieties of ferruginous quartzites of CMA and tailings of copper-zinc sulphide Ural ores determines the reasons of ineffective use of traditional technology solutions for recycling. The reasons of environmental hazards concerning varieties of technogenic mineral substances to the environment are identified. The presence in ferruginous quartzites complex composition of various silicates, carbonates and iron sulphides change their technological properties. So to get the iron concentrate from them suggests a new combination of technological operations performed in specially selected operating conditions. The specifics of the presence of mineral components in solid mineral wastes of nonferrous metal ores indicates the possibility of obtaining additional marketable products. With the use of laboratory multiscale modelling and physical methods of analysis regularities of variation of fractionation, separation and mineral concentration operations efficiency by varying its composition and the various influencing factors are identified. To improve the efficiency of the individual technological operations it is recommended to use different techniques, using physical and physico-chemical effects on the polymineral systems. The flow diagrams for the considered varieties of technogenic processing of mineral substances, allowing them to obtain standared quality products (metal-containing concentrates), and the results of their testing are submitted. The suggested technological solutions can reduce the amount of environmentally hazardous mineral substance, hosted in technogenic formations.

Problems of ensuring metrological traceability of measurement results of indicators of quality for food products and food raw materials

2020 ◽  
pp. 64-70
Author(s):  
Mariya Y. Medvedevskikh ◽  
Anna S. Sergeeva
Keyword(s):  
Reference Materials ◽  
Mass Fraction ◽  
Nutritional Value ◽  
Animal Feed ◽  
Raw Materials ◽  
Meat Products ◽  
Metrological Traceability ◽  
Food Products ◽  
Freeze Dried ◽  
Measurement Results

The article raises the problem of ensuring metrological traceability of the measurement results of indicators of quality and nutritional value for food products and food raw materials: water (moisture), nitrogen (protein, crude protein), fat, ash and carbohydrates. The problem under consideration can be solved by applying reference materials of food composition, traceable to state primary measurement standards GET 173-2017 and GET 176-2019 and primary reference measurement procedures (PRMP), for attestation of measurement procedures and accuracy checking of measurement results. The article discusses the results of the PRMP development of mass fraction of fat, ash and carbohydrates in food products and food raw materials, as well as mass fraction of crude fat (oil content) in oil crops seeds and products based on them. The paper also presents metrological characteristics of reference materials of composition of dry dairy products, grain-milk dry porridges for nutrition of babies, grain dry porridges for nutrition of babies, egg powder, freeze-dried meat products, animal feed. The results of the work allow for building a chain of metrological traceability from GET 173-2017, GET 176-2019 and PRMP to routine measurement procedures, thereby ensuring the uniformity of measurements of nutritional value of food products.

The global iron industry and the Anthropocene

2020 ◽  
pp. 205301962098233
Author(s):  
Kevin Mallinger ◽  
Martin Mergili
Keyword(s):  
Iron Ore ◽  
Magnetic Particles ◽  
Steel Corrosion ◽  
Global Changes ◽  
Iron Industry ◽  
Iron And Steel ◽  
Physical Chemical ◽  
Organic Particles ◽  
Rock Overburden

Iron ore is the most mined metal and the second most mined mineral in the world. The mining of iron ore and the processing of iron and steel increased sharply during the 20th century and peaked at the beginning of the 21st century. Associated processes along the iron ore cycle (mining, processing, recycling, weathering) such as the massive displacement of rock, the emission of waste and pollutants, or the weathering of products resulted in long-term environmental and stratigraphic changes. Key findings link the iron ore industry to 170 gigatons of rock overburden, a global share of CO2 with 7.6%, mercury with 7.4%, and a variety of other metals, pollutants, and residues. These global changes led to physical, chemical, biological, magnetic, and sequential markers, which are used for the justification of the Anthropocene. The potential markers vary significantly regarding their persistence and measurability, but key findings are summarised as TMPs (Technogenic Magnetic Particles), SCPs (Spheroidal Carbonaceous fly ash Particles), POPs (Persistent Organic Particles), heavy metals (vanadium, mercury, etc.), as well as steel input and steel corrosion residues.

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