ABSTRACT This part reviews the goals of introducing organic binders into iron ore pelletization. Organic binders present a relatively small number of unique binding options but provide an extraordinary amount of flexibility in how to apply them. The key factors that lead into an effective organic binder are good dispersion into the iron ore, the ability to maintain the dispersion of the iron ...
WhatsApp: +86 18838072829Humic substancebased binder (HB) has been found to be an effective substitution for bentonite in the production of iron ore pellets. In this study, it was found that the preheating time needed to be prolonged during the pelletization processing which is a remarkable feature of pellets with HB instead of bentonite.
WhatsApp: +86 18838072829Historically, bentonite has been used in the agglomeration process in North American iron ore plants. In 1986, Eveleth Mines replaced bentonite with Peridur, a carboxy methyl cellulose organic binder used in conjunction with 1% limestone. Since May of 1993, Allied Colloids` Alcotac FE8 has been used by Eveleth as the replacement for bentonite.
WhatsApp: +86 18838072829Bentonite 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.
WhatsApp: +86 18838072829The selection of an appropriate binder type and dosage is of critical importance in producing good quality pellets at a reasonable price. Binders accomplish two very important functions in iron ore pelletization: The binder makes the moist ore plastic, so that it will nucleate seeds that grow at a controlled rate into wellformed pellets.
WhatsApp: +86 188380728291. Introduction. The binder is an important additive widely applied in pelletizing iron ore concentrates, making iron ore pellets available as feedstocks for blast furnace ironmaking or direct reduction processes [1,2,3].Bentonite clay, due to its excellent effectiveness and relatively low cost, has been the predominant binder for pellet production since 1950s [4,5,6].
WhatsApp: +86 18838072829fine 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 ...
WhatsApp: +86 18838072829Iron 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 ...
WhatsApp: +86 18838072829Any 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.
WhatsApp: +86 18838072829In 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 ...
WhatsApp: +86 18838072829fine 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 ...
WhatsApp: +86 18838072829January 2017. Jacob McDonald. The replacement of bentonite as the standard iron ore binder is an important factor in the future of iron processing. Bentonite adds %% unwanted silica to the ...
WhatsApp: +86 18838072829Pellet ore not only has excellent metallurgical and mechanical properties, but is also an important metallurgical raw material used to solve the problem of increasing depletion of global highgrade iron ore resources. Bentonite has long been widely used in pellet ore production, which is not only expensive but also causes serious metallurgical pollution. Organic binders can form stronger ...
WhatsApp: +86 18838072829A 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 ...
WhatsApp: +86 18838072829ABSTRACT The addition of pellet binders often represents a compromise between the pellet grade and quality measures as strength, reducibility, and dustiness. Each inorganic compound present within the pellet plays a specific role in each aspect of creating a highquality pellet. This review seeks to clarify the roles of both binders and coincidentally present inorganic compounds to highlight ...
WhatsApp: +86 18838072829Iron ore pellets are spheres of typically 616 mm ( in) to be used as raw material for blast furnaces. They typically contain 6472% Fe and various additional material adjusting the chemical composition and the metallurgic properties of the pellets. [3] Typically limestone, dolomite and olivine is added and Bentonite is used as binder.
WhatsApp: +86 18838072829Bentonite is the most common binder in iron ore pelletization. Bentonite has proven to be the most effective binder owing to its high water adsorption capacity and dry film strength. It is commonly used at an addition level of % by weight of iron ore. However, because of its acid constituents (SiO 2 and Al 2 O 3), it is considered as ...
WhatsApp: +86 188380728291. Introduction. Iron ore pellets are an essential part of the blast furnace charge, with high grade, good strength, uniform particle size, good metallurgical properties, and so forth. 1,2 Especially, fluxed iron ore pellets have better hightemperature soft fusion performance and reduction performance. 3−5 However, the burden of the blast furnace is still dominated by a high proportion of ...
WhatsApp: +86 18838072829The functions and molecular structure of organic binders for iron ore pelletization have been investigated in this paper based on the basic principles of molecular design, interface chemistry and polymer science as well as failure model of binding systems. The following conclusions are achieved. Functionally, good organic binders for iron ore ...
WhatsApp: +86 18838072829⋅ Iron ore pelletization with bentonite binder works by a different binding mechanism than with FBB. Bentonite is a physical binder, while FBB is a pozzolanic binder. ⋅ Iron ore concentrate pellets produced with up to 50% of the bentonite replaced by flyash exceeded minimum industrial specifications for dry compressive strength.
WhatsApp: +86 18838072829Bentonite 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.
WhatsApp: +86 18838072829CCS 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 ...
WhatsApp: +86 18838072829binders added to bentonite, to form a hybridbinder system for Iron Ore Pelletization. The kinetics of the agglomeration process and resulting properties of green pellets
WhatsApp: +86 18838072829In order to pelletize iron ore fines and/or concentrate, a binder is needed. Binder selection can vary from process to process depending on the unique goals of the project at hand, but bentonite clay is a common choice for iron ore. Various additives may also be included with the feedstock to improve performance in the blast furnace.
WhatsApp: +86 18838072829Molasses was used as an alternative binder to the bentonite binder. The change in moisture absorption by pellets prepared with different iron ores and different molasses contents were investigated. Iron ore properties exerted the major effect on pellet behavior and final pellet quality. The absorbed moisture content of pellets prepared without binder, bentoniteadded pellets, and molasses ...
WhatsApp: +86 18838072829The 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.
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