fine iron ore fluidized bed



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Fine Iron Ore Fluidied Bed - HeNan Mining Heavy Industries ,

Fine Iron Ore Fluidied Bed 1 Introduction Fluidied bed reactor has been widely employed in the direct reduction process as reduction or pre-reduction equipment for the fine iron ore due to its good efficiency of heat and mass transfer However defluidiation caused by the high cohesion of newly-formed metallic iron at elevated temperatures usually induces abrupt shutdown of the equipment and ....

Fluidized-bed technology for the T production of iron ,

fluidized-bed technology were started in the last two decad The main advantage of this technology is that fine iron ore can be charged Fluidized-bed technology for the production of iron products for steelmaking by FJ Plaul*, C Böhm*, and JL Schenk† Synopsis The dominating technologies for steelmaking are the basic oxygen...

Factors Affecting the Sticking of Fine Iron Ores during ,

31-05-2007· Factors Affecting the Sticking of Fine Iron Ores during Fluidized Bed Reduction Seven types of iron ores were reduced to iron phase in a laboratory fluidized bed at 900°C by N 2 -H 2 mixtures to examine the influence of ore type, reducing potential, and sulfur potential on sticking phenomenon and iron morphology in the bed...

EP1109940A1 - 2-stage fluidized bed type fine iron ore ,

A 2-Stage fluidized bed type reducing apparatus and a reducing method for fine iron ore of a wide particle size distribution with increasing the reducing gas utilization degree are disclosed Fine iron particles dropping through the holes of a gas distributor (102, 202) can be recycled into the fluidized bed type furnace, thereby preventing an impediment of the reducing gas flow due to ....

EP1055006A1 - Fluidized bed type fine iron ore reducing ,

fluidized bed bed type type furnace iron ore gas Prior art date 1998-12-09 Legal status (The legal status is an assumption and is not a legal conclusion Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed) Withdrawn Application number EP19990957428 Other languages German (de) English (en)...

Sticking Mechanism Analysis of Fine Iron Ore in Fluidized ,

Abstract: To guide the fluidized bed industrial application,exploring the ordinary conditions of fine iron ores in the fluidized bed to restore loss of flow between fine iron ore particlA process with Australia fine iron ore with 6142% iron is reduced in fluidized bed at the experimental conditions include 923 K to 1 023 K temperatures,particle size range of 063 mm to 10 mm,coating ....

Fine Iron Ore Fluidied Bed - HeNan Mining Heavy Industries ,

Fine Iron Ore Fluidied Bed 1 Introduction Fluidied bed reactor has been widely employed in the direct reduction process as reduction or pre-reduction equipment for the fine iron ore due to its good efficiency of heat and mass transfer However defluidiation caused by the high cohesion of newly-formed metallic iron at elevated temperatures usually induces abrupt shutdown of the equipment and ....

A Review on Prevention of Sticking during Fluidized Bed ,

The most important feature of fluidized bed ironmaking process is that the fine iron ore can be directly used without any sintering or pelleting processes, which can save 25–30 US dollars/ton of iron in raw material cost and reduce the cost of sponge iron by 25% 1) It is reported that the FIOR method using fluidized beds cost only half of the material cost of the MIDREX method using a shaft ....

EP1060273A1 - Complex fluidized bed type fine iron ore ,

A complex fluidized bed type apparatus for reducing a fine iron ore, and a method therefor, are disclosed in which the reactivity of the fine iron ore particles, the gas utilization degree and the gas consumption rate are most efficiently, thereby reducing a fine iron ore of a wide particle size distribution in an optimal manner The apparatus includes first (100) and second (200) fluidized ....

Reduction Behavior and Structural Evolution of Iron Ores ,

The reduction of iron ore fines by means of fluidized bed technology has become an alternative route of ironmaking To investigate the reduction behavior of fine ores and to improve fluidized bed p....

An Introduction to Processes for Fine Iron Ore Treating in ,

An Introduction to Processes for Fine Iron Ore Treating in Fluidized Bed: FAN Jianfeng,LI Weiguo,ZHOU Yusheng,LI Zhaoyi: Baosteel Research Institute, Baoshan Iron and Steel Co, Ltd, Shanghai 201900, China...

WO2000037687A1 - Complex fluidized bed type fine iron ore ,

A complex fluidized bed type apparatus for reducing a fine iron ore, and a method therefor, are disclosed in which the reactivity of the fine iron ore particles, the gas utilization degree and the gas consumption rate are most efficiently, thereby reducing a fine iron ore of a wide particle size distribution in an optimal manner The apparatus includes first (100) and second (200) fluidized ....

Review A Review on Prevention of Sticking during Fluidized ,

sticking problem during fluidized bed reduction of fine iron ore are comprehensively summarized in this article The causes of sticking, the influencing factors of sticking and the solution of sticking are firstly discussed, followed by the analysis on the possible development direction of future fluidized bed ironmaking technology...

Reduction of fine iron ore with circulating fluidized bed ,

By means of pre-reduction of iron ore fines, productivity of a blast furnace can be increased and iron ore unsuitable for sintering process can be easily used in the blast furnace As a pre-reduction process a circulating fluidized bed (CFB) has been developed with a pilot plant The riser of CFB is 550 mm in inside diameter and 10 m in height...

Fine Iron Ore Fluidized Bed - anamakeupnl

Fine Iron Ore Fluidized Bed Coating carbon on the iron ore powder is a quite promising way to prevent defluidization during its high temperature direct reduction in the fluidized bed reactor, but usually causes excessive carbon content of the dri production, thus the present study focuses on decreasing the critical carbon content (c-critical value) needed for...

Sticking Mechanism Analysis of Fine Iron Ore in Fluidized ,

Abstract: To guide the fluidized bed industrial application,exploring the ordinary conditions of fine iron ores in the fluidized bed to restore loss of flow between fine iron ore particlA process with Australia fine iron ore with 6142% iron is reduced in fluidized bed at the experimental conditions include 923 K to 1 023 K temperatures,particle size range of 063 mm to 10 mm,coating ....

Reduction kinetics of fine iron ore powder in mixtures of ,

01-05-2015· Reduction kinetics of fine iron ore powder in different gas mixtures were investigated in high-temperature fluidized bed at a scale of kilograms Influence of processing parameters, such as particle size, gas flow velocity, height of charge, temperature, compositions of gas mixture, and percentage of inert components, on reduction kinetics was experimentally determined under the ,...

Reduction of fine iron ore via a two-step fluidized bed ,

The fine iron ores from Chile are reduced in a laboratory fluidized bed at 973–1173 K with CO–H2–CO2 mixtures to investigate the influence of reduction condition on the morphology of newly ....

Direct reduction of fine iron ore concentrate in a conical ,

Direct reduction of fine iron ore concentrate in a conical fluidized bed Shengyi He a,b,HaoyanSuna, Chaoquan Hua,JunLia,QingshanZhua,b,⁎, Hongzhong Lia a State Key Laboratory of Multiphase ....

Recent status of fluidized bed technologies for producing ,

01-02-2011· In FINEX ® dried fine iron ore is charged into a series of fluidized bed reactors together with fluxes such as limestone or dolomite The iron-ore fines pass in a downward direction through four reactors where they are heated and reduced to DRI by means of a hot reducing gas – derived from the gasification of coal – that flows in counter-current direction to the solids...

Fine Iron Ore Fluidied Bed - HeNan Mining Heavy Industries ,

Fine Iron Ore Fluidied Bed 1 Introduction Fluidied bed reactor has been widely employed in the direct reduction process as reduction or pre-reduction equipment for the fine iron ore due to its good efficiency of heat and mass transfer However defluidiation caused by the high cohesion of newly-formed metallic iron at elevated temperatures usually induces abrupt shutdown of the equipment and ....

(PDF) The Direct Reduction of Iron Ore with Hydrogen

08-08-2021· the potential of the direct H 2 reduction of iron ore in a solar fluidized bed reactor Thirdly, the production of “renewable” H 2 will be assessed Although tests were per-...

An Introduction to Processes for Fine Iron Ore Treating in ,

An Introduction to Processes for Fine Iron Ore Treating in Fluidized Bed: FAN Jianfeng,LI Weiguo,ZHOU Yusheng,LI Zhaoyi: Baosteel Research Institute, Baoshan Iron and Steel Co, Ltd, Shanghai 201900, China...

Optimization of carbon deposition process during the pre ,

01-08-2016· 1 Introduction Fluidized bed reactor has been widely employed in the direct reduction process as reduction or pre-reduction equipment for the fine iron ore, due to its good efficiency of heat and mass transfer , However, defluidization caused by the high cohesion of newly-formed metallic iron at elevated temperatures, usually induces abrupt shutdown of the equipment and seriously hinders ....

Reduction kinetics of fine iron ore powder in mixtures of ,

01-05-2015· Reduction kinetics of fine iron ore powder in different gas mixtures were investigated in high-temperature fluidized bed at a scale of kilograms Influence of processing parameters, such as particle size, gas flow velocity, height of charge, temperature, compositions of gas mixture, and percentage of inert components, on reduction kinetics was experimentally determined under the ,...

A Review on Prevention of Sticking during Fluidized Bed ,

The most important feature of fluidized bed ironmaking process is that the fine iron ore can be directly used without any sintering or pelleting processes, which can save 25–30 US dollars/ton of iron in raw material cost and reduce the cost of sponge iron by 25% 1) It is reported that the FIOR method using fluidized beds cost only half of the material cost of the MIDREX method using a shaft ....

Fine generation ratio of iron ore in the cyclone of a gas ,

01-03-2020· On the other hand, the iron ore used in this study has a density of 3705 kg/m 3 Therefore, if the same size of the fine was produced, the iron ore was a heavier fine, eventually leading to a larger K c The other reason is that catalysts are mainly made as mentioned in chap 32, while iron ores are particles that come from the nature...

Fluidization behavior and reducibility of iron ore fines ,

Abstract A laboratory fluidized bed reactor was used to investigate the fluidization behavior and reducibility of various iron ore fin Hydrogen was chosen as a reducing agent across a temperature range of 873–1073 K The magnetite ore used exhibited strong sticking behavior after the initiation of metallic iron formation All other tested ores fluidized sufficiently well when subjected to ....

Factors Affecting the Sticking of Fine Iron Ores during ,

Seven types of iron ores were reduced to iron phase in a laboratory fluidized bed at 900°C by N2-H2 mixtures to examine the influence of ore type, red ,...

Reduction kinetics of fine iron ore powder in mixtures of ,

01-05-2015· Reduction kinetics of fine iron ore powder in different gas mixtures were investigated in high-temperature fluidized bed at a scale of kilograms Influence of processing parameters, such as particle size, gas flow velocity, height of charge, temperature, compositions of gas mixture, and percentage of inert components, on reduction kinetics was experimentally determined under the ,...