iron ore fines sintering pellet bentonite bentonite pelletizing iron ore Due to its water absorption capacity and colloidal property, bentonite is used as a binding additive to convert iron ore fines into pellets Through this process, iron ore fines are converted into spherical pellets, suitable as feed material in blast furnaces for pig iron production, or in the production of direct ...
A bentonite binder composition and method of preparation is disclosed. The binder composition is particularly useful for pelletizing iron ore fines. It is prepared by intimately combining and mixing wet bentonite in a stockpile with soda ash, the moisture in the wet bentonite bringing about reaction to form an improved binder after a suitable aging period.
size fraction of iron ore fines prepared for pelletization is shown in Table 1. Chemical analysis of iron ore and fluxes including bentonite are shown in Tables 2 and 3, respectively. The used coke fines of – mm size, contains 85% fix C, 13% ash, 1% moisture and 1% VM. The iron ore fines has been mixed with bentonite.
Bentonite Market worth over 195 bn by 2024. Oct 08, 2018· The product is used as a binding agent, offer improved mechanical abrasive strength, faster reduction and higher mineralization rates compared to ore fines which increases the productivity of sponge iron with less energy consumption
Therefore bentonite based pellets are used in sintering of iron ore fines with fluxes to reduce the coke breeze consumption as well as increase better productivity of sinter machine. Therefore, utilization of these fine wastes as aggregates is a great opportunity to recycle of blast furnace wastes.
and volatile matter: wt%, was used in pellet mix. The sized iron ore fines were mixed with bentonite ( %) and required amount of fluxes to get desired pellet chemistry in a rotary cone mixer. The mixture was then pelletized with intermittent manual spray of water (79 %) for nucleation and growth of pellets in
· In steel industry and in mines, a significant amount of ultrafines waste iron oxides and iron ore fines is generated. Utilizations of these fines are required to reduce the environmental hazards and conserve the natural resources. Some of these fines are normally used in sintering practice.
Such iron ore fines are therefore agglomerated by balling into green pellets 8 ‐ 20 mm or larger in diameter in drums or discs in the presence of moisture and suitable binders and additives (such as bentonite, lime, etc.). These green pellets are subsequently hardened by firing or indurating at
· The minipellets were composed of ultrafine iron ore and calcium hydrate while coke fines were used as a coating layer. One part of minipellets was cured with CO 2 to improve the strength of green pellets while another part was kept uncured. The trails were carried out in sinter pot after adjusting the operating parameters.
· Introduction. Iron ore lump, sinter, and pellets comprise the main burden of modern blast furnaces. However, sinter and pellets are now the dominant blast furnace burden, because the natural lump supply has declined dramatically due to depletion of the world's highgrade competent iron ore .
Sintering : In sintering fine mineral particles are agglomerated into a porous mass by incipient fusion caused by the heat produced by combustion within the mass itself. In this case the iron ore fines and other iron bearing recycling materials are mixed with fluxing material, moisture and solid fuel normally coke breeze and fed to the permeable grate of sintering machine.
•Fine and Ultra fine iron ores will command an everlarger share of iron ore sales in future. •Growing number of iron and steel producers increasing proportion of pellets in burden. •Fluctuating prices of iron ore fines and pellets in world market can seriously affect costefficient iron making. •Pellets preferred over sinter and lump ...
Sintering. In order for the pellets to achieve their final properties, they have to be sintered, which means that the pellets are heated so that the iron ore particles partially melt together. After the pellets have been sintered at approximately 1,250°C, they can cope with a load of up to 250 kg. Cooling
The invention provides a kind of manufacture method of thin iron ore pellets raw material of this pellet agglomerate comprises fine iron concentrate powder, rich ore powder, cold and hot return fines material, unslaked lime, Wingdale, additive, coal raw pellet ore carries out sintering after rolling one deck coal dust the proportioning of powdered iron ore ...
· The ore being pelletized must have a sufficiently fine particle size ... is determined by how well it can carry out each of these functions while at the same time not causing contamination or sintering problems. Bentonite is a traditional binder used to improve the properties of ... Figure illustrates typical iron ore pellets [22].
1 THE USE OF IRON ORE FINES IN COLDBONDED SELFREDUCING COMPOSITE PELLETS By Innocent Nikai Supervisor: Professor GarbersCraig A dissertation submitted in partial fulfillment of the requirements for the
iron iron ore fines sintering pellet bentonite HFC Refrigerants (55) HST Hydraulic Cone CrusherHST series hydraulic cone crusher is combined with technology such as machinery, hydraulic pressure, electricity, automation, intelligent control, etc., representing the most advanced crusher technology in .
· When bentonite content is % and %, the falling strength of the green pellet improved compared with those of green pellets that contain % bentonite. Increasing homogeneous bentonite content from % to % gradually decreases the falling strength from times/pellet to times/pellet.
Thermal volume changes and oxidation mechanisms in magnetite iron ore green pellets balled with % bentonite binder, as a function of raw material fineness and pellet porosity, are shown.
can operate more efficiently without compromising pellet quality. Alcotac® synergistic organic binders in iron ore pelletization With the depletion of higher grade ore deposits, the extraction of lower grade ores gained in importance. The ores are ground to a fine particle size to separate unwanted impurities and concentrate the iron oxide.
