Pelletization studies have been carried out on high alumina and high LOI iron ore nes as per present pellet plant induration machine conditions (Table 4) to know the quality of the pellets. Table 3 Pellet green mix proportion Raw material % Iron ore nes Dolomite Coke breeze Bentonite
During iron ore agglomeration or pelletization, moist iron concentrate particles and flux materials are rolled into balls with the ... with bentonite, it is well known that using a western, or Wyoming, bentonite with high ... induration machine; and static loading in the travelling grate. Greenballs should not plastically
Bentonite is the traditionally used binder in iron ore pelletization. However, it consists of up to 85% silica and alumina which are undesired acidic gangue in ironmaking.
HighLOI iron ore fines are required for detailed laboratory pelletization studies and are used in pellet making. The received iron ore is martitegoethitic and hematitegoethitic form of ore with high LOI content. The iron ore consists of % Fe, % SiO2, % Al2O3, % moisture and % LOI. From thermogravimetric analysis, the ...
Bentonite and calcium hydroxide are the widely used binding materials in iron ore pelletizing plants. This investigation deals with studying the effect of using a mixture of both binders on the ...
In the magnetite iron ore pelletization process, oxidation of magnetite followed by sintering of the oxidized magnetite (hematite) is desirable. Optimum preheating time temperature and roasting time temperature is required to get the desired properties of the pellets with magnetite, hematite, and hematitemagnetite blend. In order to utilize the magnetite resources in a current ...
Bentonite is a predominant binder used in iron ore pelletization. However, the presence of a high content of silica and alumina in bentonite is considered undesirable for ironmaking operations. The objective of this study was to identify the alternatives of bentonite for iron ore pelletization. To achieve this goal, different types of organic and inorganic binders were utilized to produce iron ...
Bentonite is the most used binder due to favorable mechanical and metallurgical pellet properties, but it contains impurities especially silica and alumina. The importance of many researches concerning alternative binders is also discussed in this chapter.
Iron Ore Pelletization: Part I. Fundamentals. ABSTRACT The behavior of iron ore pellet binders is complex. Any pellet binder is subject to a handful of practical requirements: that it be readily dispersed through a pellet, that it effectively controls the movement of water within the pellet, and that it contributes to the interparticle bonding ...
Finely ground bentonite of size − 75 microns, comprising of SiO 2 (%) and Al 2 O 3 (%) was used for comparative study with the developed binder. All the raw materials including iron ore, Kimberlite, binder, etc. were kept in the air oven at 105 °C for minimum 12 h before carrying out pelletization studies.
Any pellet binder is subject to a handful of practical requirements: that it be readily dispersed through a pellet, that it effectively controls the movement of water within the pellet, and that it contributes to the interparticle bonding within the pellet.
Bentonite is a significant cost item in iron ore pelletization, and also contributes undesirable amounts of silica to the finished pellets. If the binding effectiveness of bentonite is increased, it will be possible to reduce the bentonite dosage, resulting in significant cost savings while producing higher quality, lower silica pellets.
In the pelletization process, the iron ore fines are converted into green pellets using drum or disc pelletizer, wherein binder and moisture are added to provide the necessary green strength. The green pellets being fragile are subsequently transferred to induration furnace, wherein the green pellets get fired to achieve the desired properties ...
CCS was measured for 20 pellets in a compression testing machine (SETT2000, Shanta Engineering, Mumbai, India) following the standard procedure of ISO 4700. ... Bentonite is the most common binder to be used in iron ore pelletization. However, bentonite contributes to additional alumina and silica in the pellet, decreasing the iron content ...
Iron ore pellets are essential inputs for producing direct reduced iron (DRI), but the conventional binders, used in iron ore pelletizing, introduce gangue oxides to the DRI and consequently increase the slag generation and energy consumption in the steelmaking unit.
A laboratory study was carried out to characterize the physical, chemical and mechanical properties of lime fluxed (varying basicity 02) hematite iron ore pellets. Lime was used as additive as well as fluxing agent for making iron ore pellets. The effect of additives on different properties of pellets was studied. The findings show that on increasing the addition of lime, more of calcium ...
The goals stemming from the final reduction process are drawn back through the pelletization process to present a clear rationale for why each material can be used to control the pellet quality. Major inorganic binders such as bentonite, colemanite, and lime are examined along with less commonly used alternatives.
ture is required, as well as a binder agent, for instance bentonite or Portland cement. The mixture is sent to the extrusion machine to obtain the agglomerated product [8]. Pelletization Pelletization is an agglomeration process of iron ore concentrates with a granulometry lower than 150 m and low concentration of impurities [10, 11].
fine concentrate. The most commonly employed one is pelletizing in iron ore industry. In pelletizing, iron ore, water and a binder are balled in a mechanical disc or drum to produce agglomerates. Bentonite is the most widely used binder. However, it is considered as an impurity due to its high SiO 2 and Al 2O 3 content. Many researchers have ...
Bentonite solutions have viscous, variable, and lubricant properties. Different types of bentonites influence pellet properties, as well as the interaction among heterogeneous or homogeneous bentonites and iron concentrate [ 3 6 ]. In this study, we utilized three different types of bentonites for a pelletizing test.
The majority of iron ores must be ground to a fine particle size to allow the iron oxides they contain to be concentrated, and the concentrate must then be agglomerated back into large enough particles that they can be processed in blast furnaces. The most common agglomeration technique is pelletization, which requires the use of binders to hold the iron oxide grains together so that the ...
For pelletization study, as received iron oxide pellet fines were ground to below 150 μ using ball mill. The particle size distribution of ground iron ore fines was determined by the Malvern particle size analyzer (Hydro 2000MU, UK) and shown in Fig. number was measured to determine surface area of the iron oxide pellet fines using air permeability apparatus (Model 6565, ToniPERM ...
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