Vale is the worlds biggest producer of iron ore and pellets, raw materials essential to the manufacture of steel. Iron ore is found in nature in the form of rocks, mixed with other elements. By means of various industrial processes incorporating cutting edge technology, iron
The iron ore concentrate is now mixed and ready for the pelletizing process. Pelletizing A pellet plant contains a series of balling drums where the iron ore concentrate is formed into soft pellets, in much the same manner that one rolls a snowball, to make a pellet
the iron ore industry, methods need to be developed for producing domestic iron ore pellets that are economical and have superior metallurgical properties that will result in coke reduction during blast furnace smelting. Since iron ore concentrates consist of finely divided particles, they must be pelletized (with a binder) for use as
iron ore, water and a binder are balled in a mechanical disc or drum to produce wet pellets. Bentonite is the most widely used binder in iron ore pelletizing industry. The use of bentonite is favorable in terms of physical, mechanical and metallurgical pellet properties, however, because of its acid constituents (SiO 2
In this example, iron ore pellets comprising iron ore and a binder, including binders according to the embodiments described herein, were prepared. The iron ore used in this example was hematite with a moisture content of between 8 to 10 wt. %. The binder was added evenly over 6000 grams (dry weight) iron ore.
Iron ore pellets are spheres of typically 616 mm (0.240.63 in) to be used as raw material for blast furnaces. They typically contain 67% 72% Fe and various additional material adjusting the chemical composition and the metallurgic properties of the pellets. Typically limestone, dolostone and olivine is added and Bentonite is used as binder.
flow diagram of iron ore pelletization Read More may cooling process of iron ore pellets in an annular cooler the flow, pressure, . Pelletizing . Pelletizing is the process of compressing or molding a , The configuration of iron ore pellets as packed spheres in the blast furnace allows air to flow between .
iron ore, water and a binder are balled in a mechanical disc or drum to produce wet pellets. Bentonite is the most widely used binder in iron ore pelletizing industry. The use of bentonite is favorable in terms of physical, mechanical and metallurgical pellet properties, however, because of
Iron ore concentrates must be coarser than about No. 10 mesh to be acceptable as blast furnace feed without further treatment. Finer concentrates are agglomerated into small "green" pellets, which are classified as either acid pellets or flux pellets. Acid pellets are produced from iron ore and a binder only, and flux pellets are produced by
In 2010, world iron ore pellet production was 388 Mt. It could be argued that the current pellet production process has been enabled by the use of binders practical experience has shown that it would be nearly impossible to agglomerate iron ore using rotary drums and discs without using a binder.
Steele stiff extrusion offers iron steel mills a proven, scalable agglomeration process to convert mill by products to feedstock. Our process scales, handling fine, wet materials while using less binder to deliver an engineered end product for the consistent durability and
metallic iron from ore directly, in a single step. A particularly promising approach is the iron nugget process, where pellets are made that consist of iron oxide concentrate, powdered coal, flux, and a binder. When these pellets are heated, they self reduce to form metallic iron droplets that separate from the slag.
FLOFORM is readily miscible with the iron ore concentrate. FLOFORM is a free owing powder supplied in sealed 750 kg big bags. Full details can be found on the MSDS supplied with the product. Traditionally bentonite is used as binder, but it reintroduces deleterious
Iron ore pellets and Pelletizing processes. The dried material is fed to the ball mill for grinding. Concentrate / ground iron ore of typical size 80% sub 45 microns is required to be at 9% moisture. Suitable binder (Bentonite) is added to the concentrate and is thoroughly mixed in high intensity mixer.
National Steel Pellet Companys iron ore pellets have the following characteristics (FOB Mine) Total Iron 65.85% Silica (SiO2) 4.5% Lime (CaO) 0.68% Phosphorous 0.010 Size %+1/4 96.5% (after tumble) Compression Strength 560 pounds AISI wishes to thank the National Steel Pellet Company for
Oct 26, 2010The most common agglomeration technique is pelletization, which requires the use of binders to hold the iron oxide grains together so that the agglomerates can be sintered into high strength pellets. Although bentonite clay is the most commonly used binder, there are many other possibilities that could be competitive in a number of situations.
Jan 01, 2012Binders 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 well formed pellets. During drying, the binder holds the grains in the agglomerates together while the water is removed and continues to bind them together until the pellet is heated sufficiently to sinter the grains
Another important feature of the use of peat moss as binder is that it does not dilute the pellet with unwanted silica. Most of it burns and helps in the firing process and, after burning, it results in a porous pellet that is more easily reduced in the blast furnace.
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The invention also refers to process for preparing iron ore pellets wherein a composition comprising bentonite and molasses is used as binder. The present invention refers to a binding composition containing bentonite for use in binding finely ground iron ore.
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 final concentrated iron ore product. Excess silica from bentonite addition has been calculated to consume approximately 2.4 MJ of additional energy during the production of one metric ton of pig iron.