The chemistry of the raw materials is calculated to fit BF slag formation requirements; under this operational guideline, iron ores together with fluxes (limestone, dolomite, serpentine) and reverts (mill scale, flue dust BOF OG sludge, etc.) are blended in the blending yard and conveyed to the sinter plant proportioning silos, where the coke …
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
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), ...
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 breeze, and return fines from the sinter plant as well as recycled ferruginous materials from downstream iron and steelmaking processes.
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.
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 sintering process begins with the preparation of a sinter mixture consisting of iron ore fines, fluxes, solid fuel (called bonding agents in Japan) such as coke breeze, and return fines from the sinter plant and blast furnace as well as recycled ferruginous materials from downstream iron and steelmaking processes. After being mixed in a ...
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 …
7.2.1 Effects of Gaseous Fuel Injection Method on Sintering Performance. The effects of the ordinary method and LNG (liquefied natural gas) injection on the combustion of the material layer, the capacity, and the quality of sintered ore are shown in Table 7.1 (Oyama et al. 2011).The observations confirm that the red-hot region …
WebOct 22, 2015 Ideal size of ore Fines -10 mm to 100 mesh Coke breeze -3.2 mm 85% Flux - - 3.2 mm 85% (2) Fuel content - Variation in Fuel content in Charge Mix affect the peak Temperature attained during sintering, the combustion zone will not be uniform leading to poor bed permeability, This increases return fines generation
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 ...
When deteriorated raw materials are applied, sintering process is balanced with higher ratio of return fines, which greatly affected sintering efficiency and fuel …
In normal sintering operations for preparing feed for the lead blast furnace, lead concentrate is mixed with slag, return sinter, and fluxing agents and the mixture is pelletized and sintered. The mixture consists of approximately 25 pct high-grade lead concentrate, 50 pct return sinter, 15 pct slag, and 10 pct fluxing agents, dusts, etc.
The article describes the concept of partially replacing the sinter in a blast furnace charge with extrusion briquettes to form the basis for sintering and briquetting synergy. The comparability criteria for sinter and extrusion briquette (brex) properties and production parameters were analyzed along with a substantiation of the fundamental …
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.
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.
Sintering is an agglomeration process of fine mineral particles into a porous mass by incipient fusion caused by heat produced by combustion within the ... Department of an Integrated Steel Plant. 3. PROCESS BRIEF Sintering process is developed mainly to utilize under size of lump ore called iron ... Return Fines, Mixing Drums, Sinter Machine ...
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].
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 …
Sintering is agglomeration of fine grained iron ore for blast furnace burden preparation. During the sinter transportation process fine sinter (–5 mm) is produced which cannot be charged in the blast furnace as high percentage of fines creates gas flow problem in blast furnace. The screened sinter is recycled to the raw material bedding …
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 difference between the weight of the cold fines, and the weight of the total fines produced, gives a measure of the hot fines. Any abnormal variation in the rate of production of hot or cold return fines indicates a possible plant fault. The following factors can affect the rate at which fines are produced: Mix control; Particle size ...
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 …
Based on the particle size, iron ores are classified as iron ore fines (<10 mm) or iron ore lump (6.3–31.5 mm); iron ore fines are first processed in a sinter plant, while lump ores can be charged into the blast furnace (BF) directly. Iron ore lump is the lowest cost iron bearing material for the BF burden.
By altering the sequence of the mix to be sintered to favour the granulation nucleus action, which is provided by a certain component as it could be the return fines.
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 …
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.
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 ...
A sinter plant is used to agglomerate iron ore to produce sinter, a product that can be used in a blast furnace.[1] According to the U.S. Environmental Protection Agency, the sintering process converts fine-sized raw materials, including iron ore, coke breeze, limestone, mill scale, and flue dust, into an agglomerated product, sinter, of suitable size for charging …
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.
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.
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.
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, …
The present study gains significance because the internal return fines (expressed henceforth as a percentage of base mix) generation was on the higher side at Tata Steel's Kalinganagar works (~ 26-28%). Figure 1. Trend of internal return fines, TSK SP, 1st Nov 2018 – 31st May 2019.
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 …
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 breeze, and return fines from the sinter plant as well as recycled ferruginous materials from downstream iron and steelmaking processes.