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. Use of boron compounds as binders in iron ore pelletization the open mineral processing journal, 2010, 3. The most common agglomeration technique is pelletization, which requires the use of binders to hold the iron. Effectiveness of organic binders for iron ore pelletization by larry a. The effects of adding different quality and different proportion of bentonite on falling strength, compression strength, and shock temperature of green pellet were. Introduction to iron ore pellets and pelletizing processes. These are typically fed to a blast furnace or dri plant as part of the process to make steel. However, heat induration requires tremendous quantities of energy to produce highquality pellets, and is consequently expensive. Iron ore pellets are spheres of typically 616 mm 0. Cold bonding is a lowtemperature alternative to heat induration. Iron ore pelletization download pdf info publication number us4684549a. The fines resulting from the concentration process must be agglomerated for use in iron and steelmaking. Utilization of iron ore fines beneficiation process is generally customized as per the ore mineralogy and has to be established through laboratory andor pilot. The first point is to reach, during the balling stage, the capillary state without exceeding it.
The pelletization process is the primary consumer of binders in the iron ore industry. 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. Iron ore beneficiation hematite, magnetite and other metals. Watch how pelletization of iron ore can lead to energy savings of 126 tj with a 50% increase in sponge iron production annually.
Characterization of humic acid modified bentonite binder. Floform iron ore pelletization snf holding company. Pdf binders in iron ore pelletization researchgate. Iron ore pelletization straight grate and tg kilnannular cooler. For free air flow the powder of iron ore should be in spheres. Iron ore pelletization ppt mining machinery a summary of the news. 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. Depending on the quality of iron ore, a dual binder system comprising both. 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. Effect of bentonite on the pelleting properties of iron. Typically limestone, dolomite and olivine is added and bentonite is used as binder the process of pelletizing combines. The process of making pellets from iron ore is called pelletizing. The most common agglomeration technique is pelletization, which requires the use of binders to hold the iron oxide grains together so that the. The first equipment used to manufacture pellets on a commercial scale was the conventional coating pan, but it has significant limitations as pelletization equipment.
However, the content of iron in ore deposits has deteriorated and lowgrade iron ore has been processed. The iron ore pelletizing process consists of three main steps. The pellets are then called green balls and their strength is due to the liquid bonds associated with the capillary. Project planning, process selection, equipment selection with sizing. Effects of calcium hydroxide and calcium chloride addition. Zahl united states department of the interior manuel j. Pelletization of fine powders has grown enormously in importance as an industrial process and particularly so in the iron ore industry. Mixing is a function of the p an shape, the t ilt angle, the b affle arrangement, and the r. Iron ore pelletization technology and its environmental impact assessment in eastern region of india a case study by g. This paper mainly involves the functions and molecular structure of ideal organic binders for iron ore pelletization.
Use of boron compounds as binders in iron ore pelletization. Study on the induration cycle during pelletization of goethitic iron ore golap md. The selection of an appropriate binder type and dosage is of critical importance in producing good quality pellets at a reasonable price. Iron we have a pelletizing plant in oman and stakes in joint ventures in china the study of iron ore. Binders accomplish two very important functions in iron ore pelletization. The manufacture of steel from a lowgrade iron ore involves processes like mining, crushing, separating, concentrating, mixing, pelletizing, and shipping. 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. Pellets are small and hardened iron balls with a diameter of 1020 mm and are used as raw material for ironsteel manufacturing. 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. They typically contain 6472% fe and various additional material adjusting the chemical composition and the metallurgic properties of the pellets. United nations development programme, india partners with ministry. The green pellet strength can be obviously improved by using the hamb binder. 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. Effectiveness of organic binders for iron ore pelletization.
Pelletization prosess pelletization is the process of making spheres of high carbon contains uniform quality iron ore. Iron ore pellets and pelletization process ispatguru. 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. Changing dynamics of iron ore pellets industry blogs. Iron ore pelletization is a tumblegrowth agglomeration mechanism for solid particulates, which must comply with two key points. Effects of calcium hydroxide and calcium chloride addition to bentonite in iron ore pelletization show all authors.
Study on the induration cycle during pelletization of. Iron ore pelletization and beneficiation technology in poland. Iron ore fines are agglomerated into pellets and then indurated using a furnace to create iron ore pellets. Necessity of pelletization the configuration of iron ore powder in the blast furnace is more tightly packed and restricts the air flow. Iron ore pellets are spheres of typically 818 mm 0. Floform iron ore pelletization floform, an alternative traditionally bentonite is used as binder, but it reintroduces deleterious elements such as silica and alumina. Iron and steel manufacturing process ppt free download as powerpoint presentation ppt, pdf file pdf, text file txt or view. Metso is the only supplier in the world that has both the. Iron ore pelletization technology and its environmental impact assessment in eastern region of india a case study. Techno economic study of iron ore pelletization plant.
Iron ore pelletizing plants promecon concrete technology by ms shetty pdf free download. 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. Iron ore pellet feed fines pff the iron ore pelletizing process is. 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. Us2799572a iron ore pelletizing process and product. Once weighed, the pellets were indurated in a preheated muffle furnace at varying temperatures, each for duration of 45 minutes. Iron ore pellets are marblesized balls of iron ore that are fused with clay for transportation, and used in steel manufacture. 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.
Iron ore pelletization rotary kiln pdf travel mafia. Iron ore pelletization iron ore pelletization china 1 2005 5,000,000 hematitemagnetite drum this was the first iron ore pelletizing plant. The iron ore production has significantly expanded in recent years, owing to increasing steel demands in developing countries. Iron ore pelletization technology and its environmental. Iron ore pelletization 459 minerals demonstrated that addition of organic binder 0. Iron ore concentrate pellets are traditionally hardened at high temperatures in horizontal grates and gratekiln furnaces. Pelletizing of iron ore was started in the 1950s to facilitate the utilization of finely ground iron ore concentrates in steel production.1180 1190 220 1217 23 150 265 570 268 761 1537 1166 361 818 1199 88 857 106 87 623 1021 467 603 295 319 960 1378 559 1212 210 250 806 1017 410 1195 967 256 67 325