The paper describes return sinter fines regime and the factors influencing it under the prevailing condition of the sintering plant at Bhilai, India. The effect of return sinter fines, basicity and other variables on the yield of sinter and speed of sintering has been evaluated through the pot sintering experiments designed statistically and …
The traveling grate sintering plant process begins with the preparation of a raw mix of iron ores, fluxes, in-plant dust and spillage fines, solid fuel, and return fines. Water is added to the raw mix to obtain optimum permeability for lower electricity consumption, maintained by conveying the raw mix carefully onto the sinter machine.
ratio of return fine (+1 mm) and return fine (–1 mm), which were 7.7% and 7.3% respectively, corresponds to the size distribution of return fine shown in Fig. 4, in which –1 mm ratio is 49%. Sintering was performed under constant pressure drop of 10.3 kPa of sinter packed bed, after igniting by LPG burner for 1 min under 5.2 kPa.
The author has actively contributed to projects for setting up of batch type (capacity 15000 tpa) sinter plants at industry site. The first plant was setup for iron ore fines, the second unit was setup for utilization of manganese ore fines and the third plant was setup for utilization of manganese ore bag house dust.
In this paper, through sintering pot tests, the influence of the return fines particle size, mass ratio, and embedded location on productivity, yield, flame front speed, and permeability of sinter packed bed in the sintering process was clarified.
The sintering process is used to agglomerate a mix of iron ore fines, return fines, fluxes, and coke breeze, with a particle size of less than 10 mm, so that the resulting sinter, with a screened size of 5 mm to 30 mm, …
An iron ore sintering plant has a production rate of 50 t h −1 measured the classification and return of the inadequate fraction of the sintered product. The efficiency of the installation is of 90%. ... Apart from the return fines, RF (recirculated sinter as a consequence of not accomplishing the size specifications), ...
Assimilation ability and liquid fluidity of return fines were higher than sintering blend, resulting in promotion of low-temperature melt generation. The optimal addition of return fines from BF sieving was suggested not to surpass 30 mass% by melt generation balance, and the ratio for return fines from sintering sieving should be controlled at ...
Prior to dispatch of sinter to the blast furnace for hot metal production, the sinter product from the sinter cooler is screened to remove smaller/finer particles. The undersize so generated is called internal return fines, which are generally recirculated into the sintering machine. A very high level of internal return fines generation limits the …
Considering a typical sintering mixture (61% of iron ore, 12% of fluxes, 23% of return fines and 4% coke breeze) ... can be explained by the different properties of the raw materials employed and the different abatement systems of each sintering plant evaluated. Lead presents the highest emission factor, which can reach 5661.2 mg/t of …
The paper describes return sinter fines regime and the factors influencing it under the prevailing condition of the sintering plant at Bhilai, India. The effect of return sinter fines, basicity and other variables on the yield of sinter and speed of sintering has been evaluated through the pot sintering experiments designed statistically and ...
cause the return fines are utilized as raw materials soon after they are discharged from sinter plants. In this report, from the viewpoint of the bulk density in sinter
The range of processes used generate iron ore fines, mill scale, DRI fines, nut coke, BOF slag, Corex sludge, limestone, and dolomite fines, which are all being successfully recycled through Corex.
Increase in <5mm fraction in Blast Furnace Return Fines was mainly during transportation due to height of fall and lower Tumbler Index of Sinter. It is observed in sinter plant, when cooler bunker is empty internal return fines generation is and when cooler bunker is maintained with some sinter the internal return fines generation is less.
Heating and power needs in this sector are primarily met by coal. Sintering is regulated and impacts overall gas emissions (including CO and CO 2). Iron-making plants, particularly those engaged in agglomeration processes like sintering; require alternative fuels to limit their CO 2 emissions to the environment. This review focuses on ...
The operation data on the Bhilai sintering plant has shown that the strand productivity increases with the basicity rati0.22) However, similar to the present finding an optimum value of basicity ratio has been reported in …
DG ad ¼ c l g coshþc s c DA¼ ¼ 0 ð2:2Þ where c l s is the liquid–solid interfacial energy, c l g is the liquid–gas interfacial energy, c s g is the solid–gas interfacial energy, and h is the contact angle. The process of adhesion of the liquid to the granular solid is possible, pass from the Stage I to the Stage II in Fig. 2.2, due to the free energy of the process during
Sintering plants rank second in terms of toxic emissions after the incineration of municipal solid waste and contribute to the order of 10% ... measures that lead to reductions in the consumption of fuel and carbonate fluxes will result in ... resulting in improved sintering efficiency, and reduced return fines ratio due to poor sintering.
In one such study mixtures of iron ore fines (concentrates), return sinter fines and limestone have been prepared at concentrate/ore ratios of 20:80, 50:50, 80:20 and 100:0 and sinters have been produced with basicities of 0.8, 1.4 and 2.0. Incorporating increased amounts of concentrates in the sinter mix has made granulation more complex.
When deteriorated raw materials are applied, sintering process is balanced with higher ratio of return fines, which greatly affected sintering efficiency and fuel …
2.4.1. Sintering temperature measurement. Lead sinter plant trials have been carried out at the Xstrata Zinc sinter plant (Mount Isa) by the author and Xstrata Zinc staff. The design of the hood at the Mount Isa sinter plant is such that there is a 10 cm gap between the ventilation hoods for the main feed hopper and the sinter machine.
Recently, the sinter plant at Tata Steel's Kalinganagar works has faced issues of high internal return fines generation. As the sinter plant begins to increase its …
The sintering process begins with preparation of a sinter mixture consisting of iron ore fines, fluxes, solid fuel (called bonding agents in Japan) such as coke …
This paper focuses on a novel technology called return fines embedding, wherein return fines with a certain size distribution are added to granulated sintering mixtures. This technology was proposed by Kasai in 2005 [35], and it has been proven that its application can increase the permeability by 6.0 JPU in a pot suction test [36].
The sinter plant that converts the iron ore fines into a desirable blast furnace feed, offers an avenue for recycling wastes. One of the several wastes that are produced at an iron and steel plant is the undersized pellet fines, which cannot be directly used in iron making. The present study evaluated the influence of these pellet fines on the sintering …
Iron ore fines are the main source for sinter, and the chemical composition of the iron ore fines, together with the thermal conditions that blends are subjected to, plays an important role in forming the primary …
So, the sintering process main objectives are to increase the size of ore additives to a level acceptable to the blast furnace for improving permeability of burden inside the BF; to form a strong agglomerate with high bulk reducibility; to remove volatile matter like CO 2 from carbonates, H 2 O from hydroxides, and sulfur from sulfide type of …
Sinter machine feed can comprise lead concentrate, return sinter fines, fluxes of limestone, silica sand and ironstone, granulated blast furnace slag, zinc plant leach residue, dusts, secondary materials, and coke fines. Feed preparation includes the use of mixing tables and nodulizing drums. ... Injecting steam on the sintering surface is a ...
plants. Sintering of lead concentrate, that has twin objectives of sulphur removal. ... with return sinter fines along with limestone, iron ore, quartz (fluxes) and blast.
Sintering of lead concentrate, that has twin objectives of sulphur removal through oxidation and agglomeration, is a key unit process prior to the reduction in the …