The fines resulting from the concentration process must be agglomerated for use in iron and steelmaking. For free air flow the powder of iron ore should be in spheres. Depending on the quality of iron ore, a dual binder system comprising both. Iron ore pelletization technology and its environmental impact assessment in eastern region of india a case study by g.
They typically contain 6472% fe and various additional material adjusting the chemical composition and the metallurgic properties of the pellets. Binders accomplish two very important functions in iron ore pelletization. Pelletization of fine powders has grown enormously in importance as an industrial process and particularly so in the iron ore industry. Pdf binders in iron ore pelletization researchgate. Typically limestone, dolomite and olivine is added and bentonite is used as binder the process of pelletizing combines. Iron ore pelletization is a tumblegrowth agglomeration mechanism for solid particulates, which must comply with two key points. However, the content of iron in ore deposits has deteriorated and lowgrade iron ore has been processed. Effect of bentonite on the pelleting properties of iron. Cold bonding is a lowtemperature alternative to heat induration. Iron ore pelletization download pdf info publication number us4684549a. Anew kind of iron ore pellet binder named humic acid modifying bentonite hamb has been developed by the authors group, which has the advantages of both organic ha and inorganic bentonite. Zahl united states department of the interior manuel j. Iron ore pelletization iron ore pelletization china 1 2005 5,000,000 hematitemagnetite drum this was the first iron ore pelletizing plant. Iron ore agglomeration ppt ppt on pelletization plant pelletization of iron ore ppt iron ore iron ore pelletization plant ppt rio tinto in canada 2011.
Effects of calcium hydroxide and calcium chloride addition to bentonite in iron ore pelletization show all authors. Iron ore pellets are spheres of typically 818 mm 0. The process of making pellets from iron ore is called pelletizing. Waste management by pelletization of iron ores fines in indian context 122 prior to induration with the help of an electronic mass balance for accurate reading. The first equipment used to manufacture pellets on a commercial scale was the conventional coating pan, but it has significant limitations as pelletization equipment. Iron ore beneficiation hematite, magnetite and other metals. The green pellet strength can be obviously improved by using the hamb binder. Iron ore pelletization ppt mining machinery a summary of the news. Iron ore fines are agglomerated into pellets and then indurated using a furnace to create iron ore pellets. Iron ore pelletization straight grate and tg kilnannular cooler. The most common agglomeration technique is pelletization, which requires the use of binders to hold the iron oxide grains together so that the. Iron ore pellets are spheres of typically 616 mm 0.
Introduction to iron ore pellets and pelletizing processes. The pelletizing process was commercially introduced in the world market in 1955, following the world war ii scarcity of highgrade natural iron ore in the united states. Iron ore pellets and pelletization process ispatguru. The iron ore pelletizing process consists of three main steps. Iron we have a pelletizing plant in oman and stakes in joint ventures in china the study of iron ore. Floform iron ore pelletization snf holding company. Us2799572a iron ore pelletizing process and product. This paper mainly involves the functions and molecular structure of ideal organic binders for iron ore pelletization. Iron and steel manufacturing process ppt free download as powerpoint presentation ppt, pdf file pdf, text file txt or view. Project planning, process selection, equipment selection with sizing. For the pelletizing of iron ore there are two main types of processes namely, the straight travelling grate stg process and the grate kiln gk process. Floform iron ore pelletization floform, an alternative traditionally bentonite is used as binder, but it reintroduces deleterious elements such as silica and alumina. Effectiveness of organic binders for iron ore pelletization.
Effects of calcium hydroxide and calcium chloride addition. Iron ore pelletization 459 minerals demonstrated that addition of organic binder 0. Pellets are small and hardened iron balls with a diameter of 1020 mm and are used as raw material for ironsteel manufacturing. Study on the induration cycle during pelletization of goethitic iron ore golap md. United nations development programme, india partners with ministry. The selection of an appropriate binder type and dosage is of critical importance in producing good quality pellets at a reasonable price. Watch how pelletization of iron ore can lead to energy savings of 126 tj with a 50% increase in sponge iron production annually. The manufacture of steel from a lowgrade iron ore involves processes like mining, crushing, separating, concentrating, mixing, pelletizing, and shipping. Iron ore pellet feed fines pff the iron ore pelletizing process is. Iron ore pellets are marblesized balls of iron ore that are fused with clay for transportation, and used in steel manufacture. Traveling grate 5664 mm x 69500 mm rotary kiln 6858 mm diameter x 45720 mm long annular cooler 21945 mm x 3657 mm plant commissioning. Techno economic study of iron ore pelletization plant. Necessity of pelletization the configuration of iron ore powder in the blast furnace is more tightly packed and restricts the air flow. Iron ore concentrate pellets are traditionally hardened at high temperatures in horizontal grates and gratekiln furnaces.
The pellets are then called green balls and their strength is due to the liquid bonds associated with the capillary. The pelletization process is the primary consumer of binders in the iron ore industry. Utilization of iron ore fines beneficiation process is generally customized as per the ore mineralogy and has to be established through laboratory andor pilot. Characterization of humic acid modified bentonite binder. Effectiveness of organic binders for iron ore pelletization by larry a. The first point is to reach, during the balling stage, the capillary state without exceeding it. Study on the induration cycle during pelletization of. Once weighed, the pellets were indurated in a preheated muffle furnace at varying temperatures, each for duration of 45 minutes. The most common agglomeration technique is pelletization, which requires the use of binders to hold the iron.
The physical and chemical properties such as particle size, montmorillonite content, swelling degree, water absorption, and blue absorption of a, b, and c bentonites were studied under laboratory conditions. Finely particulate iron ore is pelletized using finely particulate, free flowing, anionic water soluble synthetic polymer having intrinsic viscosity of from 3 to 16 as binder. Pelletization prosess pelletization is the process of making spheres of high carbon contains uniform quality iron ore. Use of boron compounds as binders in iron ore pelletization. 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.
Mixing is a function of the p an shape, the t ilt angle, the b affle arrangement, and the r. Iron ore pelletization and beneficiation technology in poland. Us2799572a us346786a us34678653a us2799572a us 2799572 a us2799572 a us 2799572a us 346786 a us346786 a us 346786a us 34678653 a us34678653 a us 34678653a us 2799572 a us2799572 a us 2799572a authority us united states prior art keywords refractory material bodies pellets iron ore fines prior art date 19530403 legal status the legal status is. Metso is the only supplier in the world that has both the. The effects of adding different quality and different proportion of bentonite on falling strength, compression strength, and shock temperature of green pellet were. Iron ore pelletization technology and its environmental impact assessment in eastern region of india a case study. The iron ore production has significantly expanded in recent years, owing to increasing steel demands in developing countries.
Iron ore pelletization view brochure floform iron ore pelletization floform iron ore pelletization use of floform pelletization is a tumblegrowth agglomeration mechanism for solid particulates, which must comply with several key points from the strength of the liquid bond during the seeding, the control of the water migration during the balling to the. However, heat induration requires tremendous quantities of energy to produce highquality pellets, and is consequently expensive. Changing dynamics of iron ore pellets industry blogs. Iron ore pelletizing plants promecon concrete technology by ms shetty pdf free download. Introduction to iron ore pellets and pelletizing processes pelletizing is a process which involves mixing of very finely ground particles of iron ore fines having a size which is less than 200 mesh 0. Use of boron compounds as binders in iron ore pelletization the open mineral processing journal, 2010, 3. Pelletizing of iron ore was started in the 1950s to facilitate the utilization of finely ground iron ore concentrates in steel production. Iron ore pelletization rotary kiln pdf travel mafia. Iron ore pelletization technology and its environmental.
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