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23-February

th SEM B TECH DEPARTMENT OF METALLURGY AND …

BLAST FURNACE PRODUCTS AND THERE USE SIZE OF BLAST FURNACE Design of blast furnace is evolved through experience . Calculation of blast furnace size is empirical in nature. Hearth dia of possco b/f increases from Hearth area increased from 1660 mtr sq 3800 mtr sq . Now there are nearly 700 blast furnace available in world.

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23-February

Use of Nut Coke In a Blast Furnace Sugandha Das Medium

Dec 02, 2017· Use of Nut Coke In a Blast Furnace. ... BF profitability increments by % to % when utilizing 10 to 20 weight percent of nut coke to BF coke rate. ... Blending nut coke in the sinter …

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23-February

Fuel Economy Index as a Criterion for Reduction of Coke ...

Fuel Economy Index as a Criterion for Reduction of Coke Rate in the Blast Furnace PO Sun;Jvala * ... percenl sinter in burden. limestone rate. slag vo lume, wind vo lume. wind pressure, etc .. hLtl lie ... Sunaval i had indicated that the coke rate in the blast furnace could be lowered by oxygen enrichment of the blast, but this coke economy was

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23-February

Influence of sinter basicity (CaO/SiO2) on low and high ...

AbstractIron ore sinter, constituting a major proportion of blast furnace burden, significantly impacts the blast furnace performance. The chemical composition of iron ore fines, particularly alumina, sinter basicity and sinter MgO together with the thermal conditions that sinter blends are subjected to play an important role in the formation of mineral phases in sinter.

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23-February

The Principle of Blast Furnace Operational Technology and ...

blast furnace processing by center coke charging. The coke layer has a gasflow resistance smaller by a factor of 10 compared to that of the ore layer and has a high gaspermeability. When a larger amount of coke exists, relatively, at the center of a blast furnace, the high temperature gas, consisting mainly of CO generated at the tuyeres,

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23-February

Blast furnace Wikipedia

A blast furnace is a type of metallurgical furnace used for smelting to produce industrial metals, generally pig iron, but also others such as lead or copper. Blast refers to the combustion air being "forced" or supplied above atmospheric pressure.. In a blast furnace, fuel (), ores, and flux are continuously supplied through the top of the furnace, while a hot blast of air (sometimes with ...

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23-February

Sinter Plant MECON

As on today, sinter has become widely accepted and preferred burden material in blast furnaces. Almost, there is no blast furnace operating without sinter, nowadays. The sintering technology was developed for the treatment of the waste fines of iron ore, coke, limestone, dolomite and …

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23-February

ANNEXURE 13 Tata Steel

Blast Furnace Lowest ever coke rate achieved through process improvement Controlling furnace hearth wear by suitable adjustment of casting practice and use of acoustic technology Kalinganagar Process Solid Waste Utilisation at Sinter Plant Solid wastes from Blast Furnaces, Steel Melt Shop and Hot

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23-February

Blast Furnace Operation an overview | ScienceDirect Topics

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 …

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23-February

Pellet Degradation Effect on Blast Furnace Performance

From the blastfurnace test, carried out with a burden consisting of 45% of pellets and 45% of sinter with basicity ratio about , and at constant driving rate, it follows that there is no significant relationship between the disintegration value of the pellets and the blastfurnace permeability.

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23-February

Technological Changes in Blast Furnace Iron Making in ...

inside the Blast Furnace due to limestone got calcined outside the Blast Furnace during making of fluxed sinter/pellets [8]. 1% increase of sinter in burden can reduce coke rate up to kg/THM. Pellets give better bed permeability due to spherical shape and better gassolid contact for its highest surface area/volume ratio, but cracks

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23-February

UDC 622 . 785 . 5 : 669 . 162 . 26 . 012 . 4 Quality ...

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 coefficient as high as t/d/m3 and a high ore/coke rate of with a PCR of 161 kg/tpig11). Improvement of blast furnace operation by ...

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23-February

CHAPTER11 FUNDAMENTALS OF IRON ORE SINTERING

constituents during the smelting inside a blast furnace. Other parameters which has influence on the coke rate and blast furnace productivity are (a) reduction properties (RDI/RI) of sinter, (b) Fe content in the sinter, and (c) fines in the sinter. It has been conclusively proved in relation to the blast furnaces (BF) of SAIL Bhilai,

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23-February

Quality Improvement of Sintered Ore in Relation to Blast ...

As a result, the blast furnace attained a productivity coefficient as high as t/d/m3 and a high ore/coke rate of with a PCR of 161 kg/tpig11). Improvement of blast furnace operation by decreasing Al2O3 content in sinter Further extending the line of the above tests, in 2001 another series of tests were conducted for decreasing ...

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23-February

What is coke rate in blast furnace? Answers

Jan 17, 2012· According to ; Coke Rate is measured in Kgs of BF Coke consumed per tonne of Hot Metal produced in the Blast Furnace(Kg/THM). By convention, this excludes coke (nut/pearl coke…

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23-February

Why is sinter used in a blast furnace? Quora

Aug 09, 2017· During the extraction of hematite(ore mining), very small sized iron particles are obtained . If particles of such sizes are directly used in the blast furnace for obtaining iron, they would choke the tuyeres and may even cause explosion inside th...

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23-February

UDC 669 . 162 . 263 Improvement of Blast Furnace Reaction ...

sinter (the utilization rate of furnace top gas ηco) increased and the solution loss of coke decreased as the JIS reactivity of coke increased, and the reaction efficiency relative to the thermal reserve zone temFig. 1 Improvement technology of reaction efficiency on a blast furnace (RIST diagram)

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23-February

High Alumina Slag and Blast Furnace Operation – IspatGuru

High Alumina Slag and Blast Furnace Operation. Blast furnace (BF) process of iron making is a process where liquid iron (hot metal) and liquid slag are produced by the reduction of iron bearing materials (sinter and/or pellet and lump ore) with coke and by …

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23-February

INTERINFLUENCING FACTORS IN AFFECTING BF COKE RATE ...

relationship amongst the variables and (b) apparent interrelationship amongst the ... Key words: blast furnace, coke rate, regression equation, sinter, burden, statistics . ... Burden Rate and Specific Consumption of Limestone and Sinter The burden rate has been found to be the most significant variable which affects the

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23-February

What is the purpose of coke in a blast furnace? | AnswersDrive

The purpose of a blast furnace is to chemically reduce and physically convert iron oxides into liquid iron called "hot metal". The blast furnace is a huge, steel stack lined with refractory brick, where iron ore, coke and limestone are dumped into the top, and preheated air is blown into the bottom.

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23-February

Recent Progress in Ironmaking Technology for 2 Mitigation ...

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

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23-February

Factors affecting Coke rate in a Blast Furnace – IspatGuru

Jun 29, 2014· Factors affecting Coke rate in a Blast Furnace BF is a counter current reactor in which the reducing gas is produced by the gasification of the carbon of the BF coke with the oxygen of the hot blast injected via tuyeres in the lower part of the furnace.

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23-February

What are the advantages and disadvantages of high silica ...

What are the advantages and disadvantages of high silica in iron ore? ... This will ultimately lead to improve productivity and reduce coke rate of blast furnaces/sinter plants. It has been ...

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23-February

Blast Furnace operation: HOW A BLAST FURNACE WORKS

Aug 04, 2011· The purpose of a blast furnace is to chemically reduce and physically convert iron oxides into liquid iron called "hot metal". The blast furnace is a huge, steel stack lined with refractory brick, where iron ore, coke and limestone are dumped into the top, and preheated air is blown into the bottom.

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23-February

Recycling of Blast Furnace Dust in the Iron Ore Sintering ...

In iron ore sinter plants blast furnace dust and other finegrained residues which are rich in iron or carbon content are recycled. The carbon contained in the blast furnace dust can be used to replace coke breeze which is added to the charge as fuel for the sintering process. However, there is no information in

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23-February

Blast Furnace Ironmaking an overview | ScienceDirect Topics

Jan 01, 2010· Specific coke or fuel consumption (equivalent coke rate: kg/THM), fuel efficiency, smelting rate or output–productivity, are commonly used to evaluate the blast furnace performance. Blast furnace coke and fuel rate has been discussed extensively in the previous section. In this section, fuel efficiency and productivity will be briefly discussed.

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23-February

Evaluation of Sinter Quality for Improvement in Gas ...

improvement of gas permeability in the blast furnace. 2. Experimental Method Sinter Properties and Reducing Gas Conditions Used in Experiments In order to evaluate the effect of sinter properties on gas permeability in the blast furnace, four types of sinter (A)– (D) with different RI, RDI, and chemical compositions were used.

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23-February

LKAB's Experimental Blast Furnace The learning curve

Tu1 – Efficient blast furnace operation: High productivity, low coke rate 3 LKAB'S EXPERIMENTAL BLAST FURNACE THE LEARNING CURVE Lawrence Hooey, LKAB, Box 952, Luleå, Sweden (Currently: Rautaruukki Oyj, Ruukki ... burden with basic Figure 4 shows a comparison of the resistance to gas flow for a

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23-February

COKE PRODUCTION FOR BLAST FURNACE IRONMAKING

Introduction of high quality coke to a blast furnace will result in lower coke rate, higher productivity and lower hot metal cost. COKE PRODUCTION The cokemaking process involves carbonization of coal to high temperatures (1100°C) in an oxygen deficient atmosphere in order to …

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23-February

Coke OvensSinterBFBOF Route | SAIL

The most common steel making technology is the BfBof Route. Coke is used in Blast Furnace (BF) both as a reductant and as a source of thermal energy. It involves reduction of ore to liquid metal in the blast furnace and and refining in convertor to form steel. The various stages of the steel plant is described below.

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23-February

Effect of Sinter Mix Composition and Additives on the ...

Effect of Sinter Mix Composition and Additives on the Quality of Blast Furnace Sinter. Authors; ... Quality Control of Blast Furnace Sinter. Proceedings AIME Blast Furnace, Coke Oven, and Raw Materials Conference (1953) 12, pp. 18–45. ... Factors Controlling the Rate of Sinter Production. Journal Iron and Steel Inst. (1953) 175, pp. 97–152.

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23-February

(PDF) Blast Furnace Performance Under Varying Pellet ...

Reduction of CO2 emissions in blast furnaces is an important problem for the steel industry. Operating a blast furnace at lower CO2 levels requires a reduction in the amount of coke that is used ...

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23-February

MINASRIO BLAST FURNACE PELLET FEED INTRODUCTION

MINASRIO BLAST FURNACE PELLET FEED INTRODUCTION ... recovery rates and other operational capabilities, the availability of mining and processing equipment, the ability to produce and transport products profitably, the impact of foreign currency ... coke rate •Reducing sinter …

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