Abstract A laboratory fluidized bed reactor was used to investigate the fluidization behavior and reducibility of various iron ore fines. 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.

 · The highest reducibility value for the Itakpe iron ore was 74.33 per cent with the corresponding temperature at 1000 ºC fired for 120 minutes, while the highest reducibility …

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 · Reducibility is important to the BF, particularly in the lower part of the lumpy zone. ... Inside a BF, iron ore is reduced in three stages from mainly Fe 2 O 3 to Fe through Fe 3 O 4 and FeO. As mentioned earlier, there is about a 20% volume increase in the reduction of Fe 2 O 3 to Fe 3 O 4 due to the transformation of crystal lattices.

About 1kg of each ore, which was crushed to various size (maximum of 3 in), was treated at 900°C using 20l/min/kg of H 2 gas as a reducing medium. The reduction degree was …

Bulk Density as a Method to Evaluate Reducibility of Hard Hematite Ore in the Direct Reduction Process Massive hematite ore (MHO) is a special high-grade iron ore used as lump ore in the process of obtaining direct reduced iron (DRI). The influence of porosity on the reducibility was investigated using optical and scanning electron microscopes.

The reducibility of titanomagnetite iron ore materials (agglomerate, pellets) with various TiO2 contents are studied. The mineralogical features of agglomerate and pellets before and after reduction are investigated. Calculations of technical and economic indicators of blast furnace smelting using iron ore materials with different TiO2 contents are carried out.

 · • Iron ore pellets are used for the production of hot metal in blast furnaces and DRI/HBI in direct reduction processes. • A blast furnace is a shaft furnace, which is charged with iron bearing materials (pellets, sinters and/or lump ore), reducing agents (metallurgical coke) and additives (limestone, quartz, BOF slag).

reducibility pellets iron ore total mass Prior art date 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.) Pending Application number JP2015512972A Other languages Japanese (ja) Inventor

 · It is shown that the reducibility of the iron ore materials is the basic reserve of economy the scarce and expensive coke in the blast furnace smelting. View full-text Article

The invention provides a device and a method for detecting reducibility of iron ore. The device comprises an air supply system, a thermogravimetric scale, a tail gas treatment system, a temperature control system, a gas control system and a compute data processing system. In the test process, a test sample 5 is placed in a crucible; a contrastive empty …

 · The conditions for the test were based on the ISO standard reducibility test for iron ores30(ISO7215, 2015), comprising a gas atmosphere of 30% CO and 70% nitrogen, and an isothermal reduction at 900 C for up to 90 min. The porosity of the analogue sinter tablets was measured using mercury intrusion porosimetry (Micrometrics AutoPore IV).

 · improving reducibility of iron ore by adding metallic Ni containing materials wherein, the catalytic effect for the reduction was generated by the addition of metallic Ni. …

 · Abstract and Figures. Experimental work has been carried out to measure the reducibility of two types of iron ore concentrates employing …

DOI: 10.1016/j.partic.2019.11.006 Corpus ID: 214443798; Fluidization behavior and reducibility of iron ore fines during hydrogen-induced fluidized bed reduction @article{Spreitzer2020FluidizationBA, title={Fluidization behavior and reducibility of iron ore fines during hydrogen-induced fluidized bed reduction}, author={Daniel Spreitzer and …

The utility model discloses a testing device for testing reducibility of iron ore. The testing device for testing reducibility of iron ore comprises a furnace body, a reduction pipe, a weighing deviceand a control device, wherein a furnace chamber is arranged in the furnace body, the reduction tube is arranged in the furnace chamber of a reducing furnace, the …

 · The Reducibility of the Iron Ore Materials as Instrument of the Coke Consumption Decrease in the Blast Furnace Smelting February 2013 Defect and Diffusion Forum 334-335:375-380

Blast furnace sludge, dust and fines; Iron ore pellet ... and reducibility. Conversion — iron and ... fines has driven a 20%-plus reduction in coke rates. Read More

 · A laboratory fluidized bed reactor was used to investigate the fluidization behavior and reducibility of various iron ore grades using hydrogen as a reducing agent …

 · The reducibility of titanomagnetite iron ore materials (agglomerate, pellets) with various TiO 2 contents are studied. The mineralogical features of agglomerate and pellets before and after ...

Title of Legally Binding Document: Method for determination of reducibility index of iron ore oxides, lumps oore, sinter and pillets Number of Amendments: 1 Equivalence: Superceding: Superceded by: LEGALLY BINDING DOCUMENT Step Out From the Old to the New --Jawaharlal Nehru Invent a new India using knowledge. --Satyanarayan Gangaram Pitroda

The present invention includes i) a step of preparing a raw material mixture containing metallic Ni powder, ii) a step of pelletizing the obtained mixture, iii) a step of burning the raw pellets, and iv) the combustion pellets And reducing the iron ore pellets under reducing conditions in the presence of CH4.

 · The technique of defining the minimum coke consumption in blast furnace smelting allows for the calculation of the reserve of coke economy on the basis of thermodynamic principles. In this reserve the constitutive role belongs to the reducibility of the iron ore materials (the agglomerate and pellets). In the present paper, the questions …

 · The addition of lime and/or silica (up to about 10% total) to sintered synthetic hematite pellets has little effect on the reducibility at 900°C. Lime additions (with or …

Synopsis: The authors investigated the gaseous reducibility of several ores in order to estimate the maximum size of ore suitable for blast furnace charge. About 1kg of each ore, which was crushed to various size (maximum of 3 in), was treated at 900°C using 20l/min/kg of H2 gas as a reducing medium. The reduction degree was based on the total weight of …

The present invention discloses a new process for the improvement of reducibility of iron ore pellets comprising the steps of i) preparing a raw material mixture which contain metallic Ni powder; ii) pelletizing the said mixture obtained; iii) burning the said raw pellets and iv) reducing the said burnt pellets under reducing conditions with presence of CH 4.

AbstractThe effect of lime and silica addition on the reducibility, of sintered iron ore and synthetic hematite pellets was investigated. The addition of lime and/or silica (up to about 10% total) to sintered synthetic hematite pellets has little effect on the reducibility at 900°C.

Mali and Spuida 42 defined an order of reducibility for different types of iron ore. In it, limonite shows the best reducibility followed by hematite and magnetite. The criteria for ordering include the specific surface area of …

During iron ore sintering the green granulated sinter bed undergoes significant changes in its structure and mineralogy due to the formation of liquid in the flame front. These changes influence the sinter reducibility, which is an important parameter influencing the productivity and fuel efficiency of the blast furnace.