Numerical simulation of the Co-combustion of coke and …
Sinter is the most common blast furnace burden material used in integrated steelworks throughout the world. The sintering process is carried out by mixing iron ore with other additives(e.g. fluxes, re-circulated materials, etc) and correcting the blend moisture by adding water in the mix as shown in Fig. 1.As process fuel, coke fines (<5 mm, 3–5 wt%) is …
Combustion behavior of granulated coke breeze in iron ore sintering
The raw materials for iron ore sintering, including iron ore, return fine (−5 mm sinter), fluxes (limestone, dolomite, quicklime) and coke breeze, were taken from a sintering plant of Baosteel, China. The chemical compositions and size distributions of iron ore, return fine and fluxes are shown in Table 1.
Iron ore sintering
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 described to identify the key ...
Iron Ore Sintering Process: Transforming Raw Ore …
Fine iron ore concentrate (<0.074 mm) and sinter ore fines (<10 mm) do not need crushing. Limestone and fuel supplied to the sinter plant have a particle size exceeding that required for successful sintering.
Influence of sintering parameters of different sintering …
In iron ore sintering process, coke combustion can influence the NOx emission. At the same time, there are other sintering parameters which can also affect the NOx emission, such as water content, limestone particle size, MgO content and return fines content.
Iron Ore Sinter
Mill scale made up 5 % of the sinter mixture, which also included 95 % high barite iron ore concentrate, limestone, sinter return, and 12 % moisture. The combination was designed to contain sinter return. ... However, in an iron ore sintering process where an immense amount of air was introduced to the sintering bed to ensure complete ...
Modeling of Combustion and Heat Transfer in an Iron …
The iron ore sintering was characterized as a relatively uniform process of solid material, coke combus-tion, various modes of heat transfer, and the complicated physical changes of solid particles. ... phase and multiple solid phases including iron ores, coke, limestone and other minor additives. The mix of the solid phases can be considered ...
Dynamic process modelling of iron ore sintering
This type of modelling study will help in identifying the optimum conditions for the sintering process and also for the process control during its operation. Process description During the sintering process a mixture of iron ore, coke, …
Influence of Limestone Types on Iron Ore Sintering
Bench-scale tests simulating the sinter strand heating profile were used to study the effect of limestone type on the rate of assimilation of a range of iron ore types.
Research on the influences of fluxes particle size on iron ore
The iron ore sintering was characterized as a relatively uniform process of solid material, coke combustion, various modes of heat transfer, and the complicated physical changes of solid particles.
Prediction of sinter yield and strength in iron ore sintering …
Iron ore sintering is a complicated thermo-chemical process which involves a vast amount of chemical reactions and physical changes. Feed materials which contain ores, coke, flux, gangue, returned mines, and etc. are granulated and charged into the sintering machine. ... limestone fines and granules in the raw mixture were assumed to be ...
Sintering Process
Sintering facilitates feed of iron ore fines in blast furnace, blended with fluxes and coking coal / coke. The depletion of iron ore quality poses new challenges to steel makers. There is a need to find alternate solutions maintaining optimal composition and metallurgical properties of the sinter to enable the production of high-quality hot ...
Basics of Iron Ore Sintering
In iron making process, sintering of iron ore fines is an integral step to utilize not only the ore fines but also to introduce a part of flux (limestone and dolomite) along with the sinter in blast furnace burden. ... All iron oxide bearing wastes and coke breeze is used for sintering purpose. The use of limestone in blast furnace is also ...
Comprehensive Effect of Coke Breeze and Limestone
For the sintering of a coarse hematite iron ore, it was found that the optimum mean particle size combination of coke breeze and limestone was 1.71mm and 1.55mm in the sinter mix.
Decarbonization of Metallurgy and Steelmaking Industries …
Iron ore, coke, and limestone are usually fed in blast furnaces from the top, which can be replaced by biocoke to reduce the carbon footprints. In the upper section of the furnace, moisture is removed from the raw materials while the hydrates and carbonates break down. ... iron ore sintering, and steelmaking. The physicochemical properties of ...
Effect of Silica Content on Iron Ore Sintering
During the iron ore sintering process, its SiO2 content considerably affects the sinter quality. In this study, the effect of SiO2 content on iron ore sintering indexes was studied, with mineral composition and microstructure analyses. It was shown that the strength and reducibility of sintering products improved when SiO2 content increased. The sinter yield and …
Partial substitution of anthracite for coke breeze in iron ore sintering
The iron ore sintering process is one of the vital steps -in an integrated steelmaking chain, the goal of which is to agglomerate iron ore fines into porous sinters with a high mechanical strength ...
Promoting the Utilization of High-Alumina Iron Ores …
High-alumina iron ore sintering is characterized by poor sinter indices and high carbon emission due to the limited formation amount of liquid phase. In this study, the conventional Ca-bearing ux (i.e., burnt lime) was substituted by a new Ca-bearing ... using the ordinary iron ores, limestone, and burnt lime. Combined with Table 1 and Fig. 1 ...
Iron ore sintering
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 is carried out in three …
Combustion characteristics in an iron ore sintering …
In an iron ore sintering bed, combustion of solid fuel supplies heat needed for sintering of fine particles and determines the quality of the sintered ores and the productivity of the process. ... The model can treat the solid material as multiple solid phases whose contents include fine particles of iron ore, limestone, coke, and coal ...
A clean disposal method of carbide slag with carbon …
Limestone or quicklime is a necessary flux in the iron ore sintering process.Its production and application process will cause CO 2 emissions and various environmental pollution, but this has not attracted enough attention. Carbide slag (CS) is a calcium-rich solid waste produced in acetylene production, the harmless disposal of which is still incomplete, …
Design And Fabrication Of Iron Ore Sintering Machine | PDF …
4. 4 Abstract The sintering process converts fine-sized raw materials, including iron, coke breeze, limestone, mill scale and flue dust, into an agglomerated product, sinter of suitable size for charging into the blast furnace. The raw materials are something mixed with water to provide a cohesive matrix, and then placed on a continuous, travelling grate called the …
Promoting the Utilization of High-Alumina Iron Ores During Sintering …
Iron ores B, C, and D contain relatively higher contents of Al 2 O 3, especially iron ore D. Limestone and burnt lime are both the conventional fluxes for sintering. Flux A was pre-prepared via the rotary kiln process by using the ordinary iron ores, limestone, and burnt lime.
Sintering Hematite Iron Ore
Indeed, and in agreement with a number of authors, limestone admixture to a sintering bed allows, above a definite value, on the one hand to lower appreciably the sintering temperature (about 100 to 150° C) and on the other hand to increase the external porosity of the bed (corresponding to the CO2 release).
(PDF) Influence of limestone particle size on iron ore sinter
Keywords: Iron ore sinter, limestone granulometry, sinter mineralogy, productivity, physical and metallurgical properties Submitted on 18 November 2009, accepted on 8 February 2010 Introduction The quality of iron ore sinter has an important role in improving productivity and reducing fuel rate in the blast furnace operation.
Optimisation model of fuel distribution in materials bed of iron ore …
The former Soviet Union experts derived the accumulation heat formula based on the heat transfer characteristics of sintering bed [3,4], which the accumulation heat quantity was calculated by the sinter temperature, air flow rate and air amount in each materials layer.However, due to the large number of parameters and difficult to obtain, the practical application of the …
Influence of limestone particle size on iron ore sinter …
Iron ore fluxed sinter is the main ferrous burden of Jindal south west steel limited (JSWSL) blast furnaces. In sinter plant fluxes including limestone and dolomite are added to improve the sinter ...
Influence of limestone particle size on iron ore sinter …
Sinter productivity increased with increasing limestone mean particle size due to improved sinter bed permeability. Sinter with limestone mean particle size of 1.25 to 1.52 mm …
A forecast model of the sinter tumble strength in iron ore …
Iron ore sinter is an ordinarily utilized iron-bearing burden in BF iron-making unit. The sintering agglomeration procedure aims to form high strength sinter including granulating of the mixed materials, distributing the granulated materials and then igniting the fuels (coke or coal), sintering the iron-bearing materials by the combustion of fuel in a grate with air-suction …
Influence of iron ore concentrate on the characteristics …
The experiment of single iron ore sintering was studied to examine the influence of different iron ores on the metallurgical properties of sinter. From this study, the following results were ... limestone decomposition, (4) was the light burned dolomite decomposition, and (5) was the magnetite oxidation. The relationship between Gibbs free energy