Iron Sand Sintering Process
- صفحه اصلی
- Iron Sand Sintering Process
A multi-objective optimization problem to maximize both sinter productivity and quality for the integrated iron ore sintering process is formulated and solved using an evolutionary algorithm called non-dominated sorting genetic algorithm II (NSGA-II) to obtain a set of Pareto-optimal solutions. In the iron ore sintering process, it is desirable to maximize …
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Iron ore's assimilation characteristic reflecting the beginning formation temperature of liquid phase in sintering process plays very important role on the fluidity of liquid phase and bonding strength of sinter body. Experimental study of assimilation characteristics of 12 kinds of iron ores were conducted using micro-sinter equipment, …
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Sintering is an agglomeration process that fuses iron ore fines, fluxes, recycled products, slag-forming elements and coke. The purpose of sintering is to obtain …
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Furthermore, TiO2 has a significant effect on the sintering process of iron ore fines. The effects of TiO2 on the metallurgical properties, microstructure, and mineral composition of LVTM sinter ...
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In iron ore sintering process, as shown in Fig. 1, raw materials including iron ores, fluxes, return fines and fuel are blended and mixed first. The blended mix is further granulated in drum with the addition of water to get a coarser particle size and narrower size distribution. ... In case 1, the SiO 2 content was adjusted by silica sand to ...
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The iron oxide (FeO) content had a significant impact on both the metallurgical properties of sintered ores and the economic indicators of the sintering process. Precisely predicting FeO content possessed substantial potential for enhancing the quality of sintered ore and optimizing the sintering process. A multi-model …
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The sea sand vanadium titanomagnetite has the problems of coarse particles, difficult agglomeration, and poor sintering performance. It is difficult for iron and steel enterprises to use it as an ironmaking raw material in large quantities. In this work, different methods were adopted to optimize the high-temperature sintering characteristics of sea sand …
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the proportion of iron concentrates with a particle size less than 1 mm is controlled to be below 12% strictly. 3.1.2. Flux Structure Selection Flux plays an important role in granulation and assimi-lation during sintering process. The fluxes often selected during sintering process are quicklime, limestone, dolomite, magnesite, etc.
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According to the U.S. Environmental Protection Agency, the sintering process converts fine-sized raw materials, including iron ore, …
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In sintering, the historical trend of the utilization of an electric current to activate the process continued followed the early work of Bloxam [] with a number of US and British patents issued from the 1910s to the 1940s.In the work described by these patents, the current was used to sinter refractory metals [38, 39], refractory carbides and …
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Discrete element method is used in this work to investigate the sintering granulation process of different-shaped nuclei iron ore particles and different drum baffle settings in rotating drums.The results show that the nuclei particle shape does not affect the flow pattern much, and the baffle setting can affect the time needed for particle flow to …
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Sintering is a thermal agglomeration process that is applied to a mixture of iron ore fines, recycled ironmaking products, fluxes, slag-forming agents, and solid fuel (coke). The purpose of the sintering process is manufacturing a product with the suitable characteristics (thermal, mechanical, physical and chemical) to be fed to the blast furnace.
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In the sintering process, iron ores are usually blended and mixed with fluxing materials, e.g., limestone and burnt lime, and fuels (so-called agglomeration agents), …
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Optimization of iron ore sintering process is to maximize the productivity and the sinter ore quality while minimizing the energy consumption. However, these economic and technical criteria are sometimes contradictory and the improvement of one criterion generally leads to the deterioration of other criteria. This paper aims to seek the …
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Hong-ming Long a School of Metallurgical Engineering, Anhui University of Technology, Ma'anshan, People's Republic of China;b Key Laboratory of Metallurgical Emission Reduction & Resources Recycling (Anhui University of Technology), Ministry of Education, Ma'anshan, People's Republic of China Correspondence yaflhm@126 …
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Proportioning is an important part of sintering, as it affects the cost of sintering and the quality of sintered ore. To address the problems posed by the complex raw material information and numerous constraints in the sintering process, a multi-objective optimisation model for sintering proportioning was established, which takes …
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Sintering is the most economic and widely used agglomeration process to prepare iron ore fines for blast furnace use. In this chapter, the sintering process is first …
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The 3D graphite/ceramic composite prototyping parts directly prepared by selective laser sintering (SLS) were porous, which led to poor strength and low thermal conductivity.
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In this study an integrated process is presented as a suitable method to transform Fe3+ oxides present in bauxite residue into magnetic oxides and metallic iron through a microwave roasting reduction, avoiding the formation of hercynite (FeAl2O4). In the first step, all the alumina phases were transformed into sodium aluminates by adding …
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Like other sintering processes, iron ore sintering converts iron ore fines of often − 8 mm sizing into larger agglomerates, namely, sinter, between 5 and 50 mm particle size, which possess the physical and metallurgical characteristics and gas permeability required for efficient blast furnace operation.As shown in Figure 14.1, iron ore sintering …
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Super-high bed sintering process is an important development direction of iron ore sintering for its lower emission and higher yield. However, there is a lack of deep understanding of the uneven quality of super-high bed sintering products, and the deterioration of reduction disintegration performance, the thickening of hearth layer and …
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ABSTRACT. Sintering is an agglomeration process that fuses iron ore fines, fluxes, recycled products, slag-forming elements and coke. The purpose of sintering is to obtain a product with suitable composition, quality and granulometry to be used as burden material in the blast furnace.
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In the process, the external moisture acts as a catalyst for pre-gasification of biomass at the early stage while iron sand, as an oxygen carrier (OC) and catalyst, contributes to the later biomass gasification, where biomass is used as a reducing agent for iron ore metallization. ... Study on applicability of biomass in iron ore sintering ...
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Red mud, which could cause numerous problems to the environment, is a hazardous waste generated from the alumina smelting industry. In general, the storage and harmless utilization of red mud are hard to implement due to its fine particle size and high alkalinity. This study put forward a novel process to separate iron (MgFe2O4) and …
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Shrinkage, Density and Hardness of Hard Magnetic Material (BaFe12O19) Based on Iron Sand Produced by Conventional Solid-State Reaction Process. R D Widodo 1, Priyono 2, Rusiyanto 1, S Anis 1, R I Ilham 1, H N Firmansyah 1 and N Wahyuni 3. Published under licence by IOP Publishing Ltd
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in the high-limonite sintering process. The eects of iron sand ratios on the basic characteristics of vanadium titanium mixed ores were investigated using micro-sinter and grey relational analysis methods. Their results indicated that the iron–sand ratio in vanadium–titanium mixed ores should be controlled within 9–12 wt% [2224–].
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The process has been widely studied and researched in the iron and steelmaking industry to know the best parameters that allow one to obtain the best …
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The micro-sintering method qualitatively simulates the physical and chemical changes of minerals and the formation of sintering liquid phase in the high-temperature sintering …
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Super-high bed sintering process has been applied in many plants, while its energy-saving effect has been reduced from 1 kg/t for every 10 mm increment at bed …
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Liquid Absorbability of Iron Ores and Large Limonite Particle Divided Adding Technology in the Sintering Process ... In addition, LLP-DAS presents good performances under the condition of high ratio of limonite in the sintering process, Sinter speed increased 0.9 mm min −1, yield increased 0.5%, and productivity increased 1.3 t …
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2. Fabrication of Porous Materials by Partial Densification and Sintering of Porous and Hollow Particles/Spheres. Partial densification of powders during SPS has been used in a number of investigations to produce porous metals, alloys, intermetallics, ceramics as well as carbon-based materials (Table 1).Incomplete sintering is ensured …
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During sintering process, iron ore fines, recycled iron-bearing materials (dusts and slags), fluxes (dolomite, limestone, etc.), and fossil fuels, such as coke breeze and anthracite, are thoroughly mixed and agglomerated into lump-like sinter under about 1300 °C provided by the combustion of fossil fuels [10].
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The iron ore sintering process is a key technology in the steel industry due to its possibility of recycling waste solids or powders internally produced during the raw materials handling or ...
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iron aggregates in the larger metallic particles in the sintering process con-tribute to the high iron recovery. INTRODUCTION The total annual amount of red mud as bauxite residue around the world has reached 120 million tons since 2011,1 and, at present, the amount is much larger due to the increasing demand of alumina output, especially in China.
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The present work proposes a novel process to sinter porous iron ore (porosity ~23–24%) with enhanced productivity and quality. The iron ore is pre-processed in the presence of calcined lime for the temporary closure of pores, which further prevents water absorption during the granulation process in drum in the presence of water. The …
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Granulation is an important process in iron ore sintering to increase particle size for better permeability. In this study, the granulation of mixed iron ore, coke, and flux in a rotating drum is studied by the discrete element method. The results of mixing indicate that the particle-particle collision number is closely related to the ...
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