Sintering is an agglomeration process that fuses iron ore fines, fluxes, recycled products, slag-forming elements and coke. The purpose of sintering is …
i) Iron ore fines (0-10 mm) ii) Coke - used as fuel iii) Limestone & Dolomite - to maintain required sinter basicity. iv) Sand - to maintain required sinter basicity. Metallurgical wastes - to use wastes effectively and thus reduce the cost of Sintering v) Lime - to enhance the process of sintering.
Based on the above issues, anthracite has become the main substituting fuel for coke breeze in iron ore sintering due to its reasonable price 19,20.When this …
D. Coke, lime stone, dolomite and iron ore particles have characteristic size distributions; in a sinter mix the lay- ering of fines onto the surfaces of larger …
crucible-like hearth. Iron-bearing materials (iron ore, sinter, pellets etc.), coke and flux (limestone and dolomite) are charged into the top of the shaft. A blast of heated air and also, in most instances, a gaseous, liquid or powdered fuel are introduced through openings at the bottom of the shaft just above the hearth crucible.
For many years in the United States, limestone and dolomite were transported to the steel producing centers for use in blast furnaces, lime plants, and sinter plants. The sinter plants were often located at or near steel mills to take advantage of the availability of a variety of iron-bearing raw materials, coke fines, and slag.
Generally before sintering a charge-mix is prepared that consists of iron ore fines, fluxes (limestone and/or dolomite), fuel (coke breeze), sinter return-fines, and sometimes some waste-recycling plant materials. Therefore, efficiency of producing good quality sinter depends on many characteristics of the charge mix.
Sintering is a process in which iron ore fines along with limestone, dolomite, coke fines, quicklime GCP dust, flue dust, mill scale and return sinter are mixed with water to form nodules and then fired to form sinter. 1) Mix of these materials is then charged into pallet cars, where an ignition burner initiates combustion from the top part of the bed and air is supplied by down draft suction.
The major advantages of using sinter in BFs are Use of iron ore fines, coke breeze, metallurgical wastes, lime, dolomite for hot metal production Better reducibility and other high temperature properties Increased BF productivity due to higher softening temperature and lower softening –melting temperature range.
Iron ore fluxed sinter is the main ferrous burden of Jindal south west steel limited (JSWSL) blast furnaces. In sinter plant fluxes including limestone and dolomite are added to improve the sinter properties of iron ore and to provide an appropriate slag composition of the blast furnace. The raw material grain size affects the sinter process ...
This also pertains to iron sinter, which is constituted of a mixture of raw materials, namely iron ore, fluxes, coke breeze, limestone, lime, dolomite, and return sinter fines, all having various size distributions. Currently Mittal Vanderbijlpark uses Thabazimbi and Sishen iron ore in the production of sinter.
Replacing dolomite with brucite improves the quality of the sinter, including by slightly increasing the iron content, which reduces coke consumption during cast iron smelting. The sinter charge at EISCO consists of 55.7% Bahariya iron ore, 6.2% limestone, 3.1% dolomite (33.33% of the total flux), 31.0% return, and 4.1% solid fuel.
also pertains to iron sinter, which is constituted of a mixture of raw materials (iron ore, coke breeze, limestone, lime, dolomite, return fines) all of which have various size distributions ...
3.3 For Dolomite/Limestone 3.3.1 Size Anaiysis The size distribution of the dolomite/lime stone shall be as follows: +6mm = 5.0 percent, J4ax – 6 + 1 mm = 90 percent. 1 mm = 5.0 percent, Max 3.3.2 Chemical analysis of dolomite shall be determined for loss on ignition, CaO, MgO, FezOJ, Si02, A1201. 3.3.2.1 Loss on ignition of dolomite and lime ...
Blast furnace produces Hot metal (Liquid Iron) using Iron ore, Coke, Sinter, Pellets and fluxes such as Lime-stone, Pyroxenite, Quartzite, Dolomite, & Mn Ore reacting with oxygen from pre heated air. This entire process of production of hot …
SINTERING PROCESS A Sinter Plant typically comprise the following sub-units as shown below. SINTERING PROCESS. The raw materials used are as follows - Iron ore fines (-10 mm), coke breeze (-3 mm), Lime stone & dolomite fines (-3mm) and other metallurgical wastes. The proportioned raw materials are mixed and moistened in a mixing drum.
D. Coke, lime stone, dolomite and iron ore particles have characteristic size distributions; in a sinter mix the lay- ering of fines onto the surfaces of larger particles pro-
For making sinter, iron ore fines, fluxes (limestone, dolomite, and quicklime), return fines (sinter with size range of <5 mm), and solid fuel are necessary raw materials. All of them were directly obtained from an integrated steelwork in China. Table 1 gives the basic chemical compositions and proportions of raw materials,
the sinter blend consisting of iron ore, limestone, coke dust and flux mixture is heated in a sintering machine, dicalcium ferrite (C 2 F-2CaO.Fe 2 O 3) structure is formed as the first product at 750-780 oC, and then, iron oxide, SFCA and silicate phases are formed at 1220-1300 oC [4,8,14,15]. With increased
primarily of iron ore, sinter, or pellets; coke; and limestone or dolomite. Iron and steel scrap may be added in small amounts. Near the bot tom of the furnace, preheated air is blown in. Coke is combusted i n the furnace to produce carbon monoxide which reduces the iron ore to iron. Silica and alumina in the ore and coke ash are fluxed with
2.2.3 Sinter Iron ore fines, Lime stone, Dolomite, coke Breeze, flue dust and mill scales will be used in the sinter plant of size 1 x 60 m 2 to produce BF sinter which ultimately will be used as raw material in Blast furnace. The flue gases generated in the sinter plant will be treated in a State -of – The Art ESP and the dust
A. Iron ore sintering is considered a 1-D transient pro-cess; the lateral transfer of heat and mass across the bed being negligible B. The continuum of the gas (O2, CO2, CO, H2O and N2) and solid (coke, limestone, lime, dolomite, mag-nesia, water, hematite and magnetite) phases; with the gases flowing through a stationary bed of solids
which increases the FeO content in sinter. The more undersigned coke breeze not only reduces the permeability of bed but also flares immediately without sintering the material; this generates more sinter return-fines. Fluxes: Lime stone, dolomite, dunite, pyroxinite are the main source of fluxes used in Indian iron and steel industry.