Use of Banded Hematite Quartzite (BHQ) in Blast Furnace …

2.3 High Temperature Properties 2.3.1 Reducibility Index (RI) Test. Reducibility of the iron bearing materials is an important factor which determines the productivity of the furnace. Reducibility test results on lump ore, sinter, pellet and BHQ as per the IS standard [] are given in Table 3.The reducibility of the lump ore is higher as …

Reduction of Iron Ore Pellets, Sinter, and Lump Ore under …

Herein, the reducibility of the iron ore pellet, sinter, and lump ore in the BF shaft are focused on. The experiments are conducted isothermally with a blast furnace simulator (BFS) high-temperature furnace at four different temperatures (700, 800, 900, …

Reduction degradation of lump, sinter, and pellets in …

sinter, lump, and pellet was compared using the reduction degradation test under different gas mixtures containing CO and H 2, covering the gas composition of …

Effect of lump ore ratio on the metallurgical properties of blast

Research Institute,Baoshan Iron &Steel Co.,Ltd.,Shanghai 201999,China. Abstract：We conducted a series of experimental studies on the metallurgical properties of N-lump and F-lump ores used in Baosteel's blast furnace,including thermal cracking,low-temperature reduction pulverization,reducibility,and droplet properties.The results show that the …

High lump use in the blast furnace -implications …

In this work, the softening and melting (S&M) behaviour and whole blast furnace (BF) performance of Newman Blend Lump (NBLL), plant sinter, and sinter-NBLL mixture were studied using S&M...

Applying machine learning to predict the impact of …

with a lump iron ore product translates to changes in blast furnace production rates, operating costs and carbon emissions. Predicting these properties enables the appropriate ... Table I. Preferred metallurgical and physical properties for sinter, pellet and lump feed, (after Lu et al., 2015) Units Lump Pellets Sinter TI (tumble index) % +6 ...

Modern Blast Furnace Ironmaking: an introduction

For high productivity low coke rate blast furnace operation the maximum lump ore rate is in the range of 10 to 15 %. The achievable rate depends on lump ore quality and the successful use of higher percentages is known. ... This has major consequences, for the sintering process as well as for the use of sinter in the blast furnace. 100 Other 80 ...

Changes in Microscale Liquid Formation in Lump and Sinter …

Under traditional blast furnace conditions, lump ore usage is improved by mixing it with the sinter in the burden to promote their favorable high-temperature …

Reduction degradation of lump, sinter, and pellets in blast furnace

In this study, the reduction degradation of sinter, lump, and pellet was compared using the reduction degradation test under different gas mixtures containing CO and H 2, covering the gas composition of conventional and H 2 injection blast furnaces. Lump (Newman Blend Lump NBLL) and pellets show a lower RDI-2.8 than sinter under all the gas ...

Sinter, Pellets, Lump Ore

Lump ores are becoming increasingly scarce and generally have poorer properties for the blast furnace burden. For this reason it is used ma inly as a cheap replacement for pellets. For high productivity low coke rate blast furnace operation the maximum lump ore rate is in the range of 10 to 15 %.

Reduction of Iron Ore Pellets, Sinter, and Lump Ore …

Reduction of Iron Ore Pellets, Sinter, and Lump Ore under Simulated Blast Furnace Conditions Anne Heikkilä,* Mikko Iljana, Hauke Bartusch, and Timo Fabritius 1. Introduction ... Furthermore, the reduction rate of sinter and iron ore pellets begins to resemble each other at higher temperatures. FULL PAPER l steel research ...

Reduction of Iron Ore Pellets, Sinter, and Lump Ore …

Reduction of Iron Ore Pellets, Sinter, and Lump Ore under Simulated Blast Furnace Conditions Anne Heikkilä,* Mikko Iljana, Hauke Bartusch, and Timo Fabritius 1. Introduction ... Furthermore, the reduction rate of sinter and iron ore pellets begins to resemble each other at higher temperatures. FULL PAPER l …

Reduction degradation of lump, sinter, and pellets in …

diffusion rate allowing reducing gas to reach the centre part of the particles, leading to the reduction of ... Compared to the conventional blast furnace case, NBLL lump and sinter show a lower degradation for the H 2 injection case while it was the opposite for the pellet, suggesting the necessity of reviewing overall burden

Pellet and its use in blast furnace | PPT

Pellet and its use in blast furnace - Download as a PDF or view online for free ... Enviroment and Pellets in Iron & Steel making • Lower emission rate • Emissions in sintering process are much higher than compared to pelletizing process. Decreases the emission rate CO2 by 85%,SOX by 90%,NOx by 20% compared to sinters. ... Pellets, in ...

Review on improving gas permeability of blast furnace

A set of softening and melting test results for a lump ore.

In recent years, a large number of researchers have studied the metallurgical characteristics of various lump ores and the smelting behavior in the blast furnace to reduce production costs and ...

High lump use in the blast furnace – implications for …

The average lump proportion in Chinese blast furnaces is only around 10% [1], however, much higher lump proportions are used in Japan and Europe. In the laboratory, the …

Mineralogical Aspects of Reducing Lump Iron Ore, Pellets, and Sinter …

Magnetite formation in sinter was predominant and is attributed to the high diffusion rate of hydrogen. ... 17.7 pct CO 2, 8 pct H 2, 2.3 pct H 2 O, rest N 2 to study the effect of hydrogen enrichment in the blast furnace on the disintegration of sinter. RDI in the CO–CO 2 atmosphere was ... Efficient reduction of lump ore, pellets, and ...

High lump use in the blast furnace – implications for …

proportion of sinter, pellet and lump in blast furnaces around the globe [1-5]. The average lump proportion in Chinese blast furnaces is only around 10% [1], however, much higher lump proportions

Reduction Degradation of Lump, Sinter, and Pellets in Blast Furnace

In this study, the reduction degradation of sinter, lump, and pellet was compared using the reduction degradation test under different gas mixtures containing CO and H 2, covering the gas composition of conventional and H 2 injection blast furnaces. Lump (Newman Blend Lump NBLL) and pellets show a lower RDI-2.8 than sinter under all the gas ...

Quality Improvement of Sintered Ore in Relation to Blast …

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 t/d/m3 and a high ore/coke rate of 4.87 with a PCR of 161 kg/t-pig11). 3.2 Improvement of blast furnace operation by ...

Reduction of iron ore pellets, sinter and lump ore under …

Abstract A blast furnace (BF) is the dominant process for making iron in the world. The blast furnace is charged with coke and iron burden materials including iron ore pellets, sinter and lump ore. While descending in the blast furnace the charge materials reduce. The iron bearing materials should reduce fast and remain in solid form until as high …

Behaviour of NINL Blast Furnace with Calibrated Lump …

Keywords: Blast Furnace, Iron Making, Iron Ore Lump (CLO), sinter, cohesive zone, thermal reserve zone, Coke Rate *Author for Correspondence E-mail: santosh178@rediffmail Mob: 8763107515 1. Introduction The overall economy of an integrated steel plant is very sensible to the performance of blast furnace.

Reduction of Iron Ore Pellets, Sinter and Lump Ore under …

Request PDF | Reduction of Iron Ore Pellets, Sinter and Lump Ore under Simulated Blast Furnace Conditions | A blast furnace (BF) is the dominant process for making iron in the world. The blast ...

Low Temperature Reduction Degradation Characteristics of Sinter…

There are a lot of researches on the reduction degradation of iron ore in the condition of traditional blast furnace, especially for sinter. However, with the development of iron-making technology, the process condition, the properties of reducing gas, the struc- ture and properties of burden all change greatly. ... So the reduc- tion rate of ...

Reduction of Iron Ore Pellets, Sinter, and Lump Ore …

A blast furnace (BF) is the most common process for hot metal production in the world. The BF is charged with metallurgical coke and iron-bearing materials …

LKAB Blast Furnace Research Areas 2004

Furnace A Furnace B Burden Pellets/sinter/lump Pellets/sinter Injection Oil Natural gas Injection rate kg/thm 59 26 Oxygen content of blast 22.1 21.5 o Blast temperature C 1189 1050 3 Moisture content of blast g/nm 24 15 o Flame temperature C 2160 2215 Top gas H Content 3.9 2.6 2 o Top gas temperature C 128 gt200 Total fuel rate kg/thm 454 515 4

Reduction of Iron Ore Pellets, Sinter, and Lump Ore under …

Article on Reduction of Iron Ore Pellets, Sinter, and Lump Ore under Simulated Blast Furnace Conditions, published in steel research international 91 on by Anne Heikkilä+3. Read the article Reduction of Iron Ore Pellets, Sinter, and Lump Ore under Simulated Blast Furnace Conditions on R Discovery, your go-to avenue for …

Reduction degradation of lump, sinter, and pellets in …

1 Reduction degradation of lump, sinter, and pellets in blast furnace with hydrogen injection Muhammad Irfan Ahadian Barustan,1) Evan Copland,1) Thi Bang Tuyen Nguyen,1) Damien O'Dea,2) 1) Tom ...

Sintering plant at a glance | PPT

Excellent blast Furnace charge material in place of lump ore, reduces the cost of smelting of ore, increases Furnace permeability there by increasing BF productivity and lowering cost in terms of lower fuel rate. ... fixation of feed rate of materials is done considering capacity of the sinter machine and quality requirement of blast furnace ...

Blast Furnace Productivity and the Influencing Parameters

Blast furnace productivity greatly depends on the quality of sinter. Sinter is to have optimum grain distribution, high strength, high reducibility, high porosity, softening temperatures greater than 1250 deg C, constant FeO content in the range of 7 % to 8 % and constant basicity.

COMPARISON OF SINTER AND PELLET USAGE IN AN …

The global seaborne iron ore market including sinter feed, lump ore, pellets and pellet feed has rapidly increased over the last decade. While sinter feed sales dominate the ... slag rate. As blast furnace slag is mainly composed of the gangue materials present in the ferrous burden, the ash content of coke, and the added fluxes it follows that ...

A comparative study of pellets, sinter and mixed ferrous …

Raw materials. Commercially supplied iron ore pellets and sinter of size range 10–13 mm are utilised in the present study. Comparable to the utilisation in the industrial blast furnace, two types of olivine fluxed pellets (types 1 and 2) and one type of iron ore sinter are mixed in 40:20:40 ratio to form a ferrous raw material bed.

Reduction degradation of lump, sinter, and pellets in blast …

Compared to the conventional blast furnace case, NBLL lump and sinter show a lower degradation for the H2 injection case while it was the opposite for the pellet, …

Review on improving gas permeability of blast furnace

2.1 Effect of low-temperature reduction degradation of sinter. The lump zone of blast furnace can be regarded as a solid burdens packed bed, and pressure drop of gas passing through lump zone can be evaluated by Eqs. ... Therefore, at a fixed coke rate, reducing liquid-phase amount prior to penetrating into coke layer should be the effective ...

Low Temperature Reduction Degradation Characteristics of Sinter…

The results show that the reducing process of sinter in COREX shaft furnace was basically same with that in blast furnace but sinter seems like breaking faster. ... It was found that lump ore has ...

Low Temperature Reduction Degradation Characteristics of …

The results show that, in the same condition of gas composition and temperature, the reduction degradation degree (RDI <3.15 mm) of sinter is high, RDI …