slag rate, reduced output and increased energy consumption through coke rate. Based on the above study, correlation of Alumina in Sinter with Blast Furnace carbon rate was conducted. As per the study, every 1 increase of Alumina in BF burden, carbon rate in Blast Furnaces
above, the changes in blast furnace operation when the sinter ratio is changed were predicted using the 2-dimensional simulator. The effects of the sinter ratio and the coke mixed charging ratio were investigated for base operational parameters productivity 2.0 t-pig m3 d, coke ratio 387.5 kgt-pig, PCR 89.1 kgt-pig, blast rate 7 780 ...
At low driving rates, the lowest coke rates were obtained with burdens composed of 100 fluxed sinter. At higher driving rates, however, good pellet burdens gave the better coke rate and the higher productivity. Nevertheless, the tests run with a 100 sinter burden at high driving rate should be repeated, as the sinter contained a higher percentage of fines 0-316 in. than during the first test.
Blast Furnaces Blast furnace gas cleaning systems were used at all of the plants visited. The gas washer wastewater application rate varied depending on the type of wet gas cleaning system used. The rates varied from 2.1 to 28 m3Mg 507 to 6715 gal.ton of iron produced with an average application rate of 6.09 m3Mg 1460 gal.ton.
Blast Volume Coke Rate Ore Grade Sinter Rate Flooding Burden Pressure Drop Raw Material Size Distribution Size Reduction Figure 2 Impact of furnace properties on blast furnace cost drivers The impacts of each parameter on the Blast Furnace are modelled individually using a series of calculation modules. The outputs of the blast furnace modules are
Feb 08, 2019 From the blast-furnace test, carried out with a burden consisting of 45 of pellets and 45 of sinter with basicity ratio about 2.2, and at constant driving rate, it follows that there is no significant relationship between the disintegration value of the pellets and the blast-furnace
coke breeze is used as a bonding agent for sinter, and lump coke is charged to the blast furnace. The coke oven gas C gas and blast furnace gas B gas generated by the coke ovens and blast furnace are used as fuels in various ironmaking processes sintering, coke ovens, hot stove, power plant, or are injected into the blast furnace
The study also showed that results obtained for a mixed burden of 80 sinter and 20 lump ore - a ratio used in many blast furnaces - are not different to results obtained from tests using only ...
Dec 20, 2017 The problem is that increasing FeO content affects coke rate, deteriorates the sinter reducibility 35, 36, and can also affect blast furnace productivity . Al 2 O 3 content min. 0.6, max. 1.8, typical 1.35 sinter quality is related with Al 2 O 3 content as
In steel making higher FeO makes the slag. 19. Permeability of the charge in the bosh region of the blast furnace is maintained by. 20. In the blast furnace Solution loss reaction is also known as. 21. The reductant used for industrial production of sponge iron are. 22. M40 index of coke indicates.
Sep 02, 2020 Blast furnace BF coal injection became a routine practice among European BFs roughly, 40 of total energy required for the process is covered by auxiliary reducing agents. ... the extent of its transfer to the BF shaft and interaction with coke, sinter, and pellets under BFsimulating conditions. ... The conducted exercises gave ...
component of a blast furnaces iron bearing material. ... obtained, however, made on the relationship between the sinter structure and its physical properties. A few ... presented the lower coke rate 75.38-77.45 kgt sinter and required the lower moisture 6.4-8.4 mass .
to the blast furnaces. Generally, 2.3 Mg 2.5 tons of raw materials, including water and fuel, are required to produce 0.9 Mg 1 ton of product sinter. 220.127.116.11 Iron Production - Iron is produced in blast furnaces by the reduction of iron bearing materials with a hot gas.
Dec 31, 1996 In order to establish the best burden materials properties, a performance test of the Taranto No. 5 blast furnace was run involving planned variations of FeO, MgO, and CaOSiOsub 2 ratio in the sinter and the use of acid and self-fluxing pellets. Modifications in coke quality occurred in the supply and these were monitored also.
Therefore, a careful monitoring of the coke and sinter quality is of prime importance. This paper describes the coke and sinter quality used in the Sidmar blast furnaces to control permeability of the furnace with long term PCI rates of 180 kgtHM and coke rates around 300 kgtHM.
at low coke-ratio operation of its blast furnace process. Furthermore, its sintering plant was closed in 1999, ... 3.2 Relationship between burden distribution in ... thickness ratio distribution in the furnace throat.7 The rate of coke supplied at the lower part of the
than ever. Sintering is a process by which a mixture of ne-grained iron ores 6.3 mm, uxes, and coke are agglomerated in a sinter plant to manu-facture a sinter product of a suitable composition, quality, and granulometry to be used as burden material in the blast furnace. Key quality parame-ters important for producing a good sinter ...
blast furnace the reaction was limited by the diffusion rate. Coke degradation was therefore mostly restricted to the coke surface in the blast furnace. At a later EBF campaign, off-gas dust was sampled during operation with different iron-bearing materials. EBF process data were used to evaluate the relationship
Recycling of Blast Furnace Dust in the Iron Ore Sintering Process ... cled BF dust is also combusted during the sintering process. Thus, the coke breeze addition to the sinter feed mixture can be reduced. However, a sufficient addition rate of fuel is ... addition rate the strength of the sinter produced can be
Graphitization of coke and its interaction with slag in the hearth of a blast furnace. K. Li, J. Zhang, Y. Liu, M. Barati, Z. Liu, J. Zhong, B. Su, M. Wei, G. Wang, T. Yang Coke reaction behavior in the blast furnace hearth has yet to be fully understood due to limited access to the high temperature zone.
Nov 26, 2018 The blast furnace BF is a counter-current gassolid. chemical reactor in which iron-bearing materials, namely. iron ore, sinter and pellet and fuel mainly coke
In the ironmaking blast furnaces, nut coke 1040 mm 223 wt- is charged together with the ... sinter and pellets and regular coke are charged in alter-nate layers. For consistent blast furnace operation, the ... MEFOS with the activated nut coke.28 Nut coke rate of. utilisation.
Two measures for coke saving and increase in blast furnace efficiency related to coke characteristics reactivity and size are discussed in this paper. Modern blast furnace operation with low coke rate and high injection rate causes a change in coke quality requirements. A discussion has arisen recently about highly reactive coke.
The relationship between iron cost reduction and blast furnace production. In the increasingly fierce competition and the current difficult steel market situation, cost reduction can be described as an inch of gold . Whoever has stronger cost control means has more room for survival and development. With the recent increase in steel prices ...
The function of the Sinter Plant is to supply the blast furnaces with sinter, a combination of blended ores, fluxes and coke which is partially cooked or sintered. In this form, the materials combine efficiently in the blast furnace and allow for more consistent and controllable iron manufacture. Figure 1 shows a simplified diagram of a ...
viscosity of the blast furnace slag were adequately maintained by composition control without top charging of lump flux Case 2 of Table 1. As a result, the blast furnace attained a productivity coef-ficient as high as 2.37 tdm3 and a high orecoke rate of 4.87 with a PCR of 161 kgt-pig11. 3.2 Improvement of blast furnace operation by ...
Nov 25, 2017 At Seraing, tests with low and high sinter burdens have shown a linear relationship between the percent of sinter charged and the coke rate, calorific value of top gases, and amount of flue dust produced. Experiments are compared with the 100-pct sinter
Dec 01, 1995 Lowering the production cost of the crude steel is the ultimate aim when planning operations in an integrated steelworks. Designing the Blast Furnace burden is a crucial point in this context, for which account must be taken not only of the raw
Using blast furnace gas to remove NO of sinter band flue gas over the copper-based catalyst ... such as blast furnace gas BFG, coke oven gas COG etc. Blast furnace gas is one of the ... Coverage rate OsCoverage rate Fig.3 The relationship between temperature and species coverage on the Catalyst.
RDI. Blast furnace productivity and coke rate are known to be positively affected as slag volume decreases 2. At TSK, sinter is the major agglomerate in blast furnace BF burden. Sinter used in BF constrains the limits of gangue content in sinter due to its effect on BF slag rate.
Jan 17, 2012 According to steel.nic.in Coke Rate is measured in Kgs of BF Coke consumed per tonne of Hot Metal produced in the Blast FurnaceKgTHM. By convention, this excludes coke nutpearl coke
Jan 30, 2020 with a blast furnace simulator BFS high-temperature furnace at four different temperatures 700, 800, 900, and 1000 C for 300min. The experimental atmosphere consists of CO, CO 2,H 2,H 2O, and N 2 simulating the conditions in the BF shaft. It is found that lump ore has lowest reduction rate in all test
Tu1 Efficient blast furnace operation High productivity, low coke rate - 3 Table 3. EBF compared to Duferco Furnace EBF Duferco Clabeq no.6 2000 Burden Pellets 73, Lump ore 27 Pellets 80, Lump ore 20 Injection Coal Coal Coke rate 477 391 Injection rate 100 118 Total Fuel rate 577 509
Oct 08, 2014 The content of fines 05 mm in sinter is the main factor that determines the gasdynamic loading of the dry upper part of the blast-furnace shaft. A reduction in the amount of fines in the skip sinter makes it possible to significantly increase the productivity of blast furnaces, reduce the coke rate, and lower the cost of making pig iron.
The improving of the reduction degree of sinter especially at temperature lower than 1100 C is very effective factor in decreasing the coke consumption in the blast furnace. 25,26,27 The coke consumption is related strongly to the direct reduction of w stite which takes place at temperature of about 1100 C as given in Eqs. 2, , . As the direct reduction decreases with COG injection, the coke