scholarly journals Heat transfer analysis of iron ore spherical pellet in the direct reduction process

2019 ◽  
Vol 1376 ◽  
pp. 012037
Author(s):  
A Milandia ◽  
A Juniarsih ◽  
R Muadz ◽  
A Sactianto
Keyword(s):  
Heat Transfer ◽  
Iron Ore ◽  
Direct Reduction ◽  
Reduction Process ◽  
Heat Transfer Analysis ◽  
Direct Reduction Process ◽  
Spherical Pellet

Study on Direct Reduction Process of Cylindrical Briquetting Hematite

2020 ◽  
Vol 988 ◽  
pp. 36-41
Author(s):  
Andinnie Juniarsih ◽  
Anistasia Milandia ◽  
Actur Saktianto ◽  
Suryana
Keyword(s):  
Heat Transfer ◽  
Heat Transfer Rate ◽  
Transfer Rate ◽  
Iron Ore ◽  
Raw Materials ◽  
Direct Reduction ◽  
Reduction Process ◽  
Iron And Steel ◽  
Direct Reduction Process ◽  
Rate Study

There are two types of iron resources such as primary iron ore and iron sand. In general, primary iron ores use as raw materials in iron and steel making and can reduce directly. In Direct reduction process, Fe2O3 (hematite) is converted to metallic iron by the removal of oxygen. This work presents a heat transfer rate study for direct reduction process of iron ore cylindrical briquette. An investigation has been carried out of different reduction parameter such as different sizes cylindrical geometry over temperatures ranging from 700°C to 1100°C for reaction time from 10 minutes to 1 hour. The result was indicated that the value of the heat transfer rate decreases in the core and outer parts of the cylinder briquettes.

Separation of aluminium and preparation of powdered DRI from lateritic iron ore based on direct reduction process

2016 ◽  
Vol 55 (3) ◽  
pp. 345-355 ◽  
Author(s):  
T. Jiang ◽  
L. Yang ◽  
G. Li ◽  
J. Luo ◽  
J. Zeng ◽  
...  
Keyword(s):  
Iron Ore ◽  
Direct Reduction ◽  
Reduction Process ◽  
Direct Reduction Process

Development Prospect of Rotary Hearth Furnace Process in China

2013 ◽  
Vol 746 ◽  
pp. 533-538 ◽  
Author(s):  
Ying Yi Zhang ◽  
Yuan Hong Qi ◽  
Zong Shu Zou ◽  
Yun Gang Li
Keyword(s):  
Resource Allocation ◽  
Iron Ore ◽  
Direct Reduction ◽  
Reduction Process ◽  
Economic Security ◽  
Practical Significance ◽  
Low Grade ◽  
Rotary Hearth Furnace ◽  
Hearth Furnace ◽  
Direct Reduction Process

Summarized the development situation of rotary hearth furnace (RHF) direct reduction technology, ore resource allocation situation and direct reduction iron demand. The survey results show that: China's iron ore resource allocation heavily rely on imported iron ore, gas-based direct reduction process (MIDREX, HYL-III, FINMET) is not likely to be the mainly direct reduced iron (DRI) process in China. However, non coking coal resources is very rich in China, research and development of coal-based direct reduction process (such as FASTMET and ITMK3 process) has important practical significance, it can strengthen the comprehensive utilization on low grade iron ore, associated mineral resources and iron & steel plant dust and sludge. It has great significance to alleviate steel scrap demand and stable development of the iron and steel industry and protect the national economic security in China.

scholarly journals Numerical Analysis of Radiative Heat Transfer and Direct Reduction of Three-Dimensional Multilayer Ellipsoidal Carbon-Containing Pellet Unit in the Rotary Hearth Furnace

Metals ◽  
2020 ◽  
Vol 10 (8) ◽  
pp. 994
Author(s):  
Nan Li ◽  
Feng Wang
Keyword(s):  
Heat Transfer ◽  
Removal Rate ◽  
Direct Reduction ◽  
Reduction Process ◽  
View Factor ◽  
Radiant Heat Transfer ◽  
Rotary Hearth Furnace ◽  
Reduction Degree ◽  
Hearth Furnace ◽  
Direct Reduction Process

It is very important for a multilayer pellet bed to have a proper description of the radiant heat transfer and direct reduction process in the rotary hearth furnace. Ellipsoidal pellets may also be used in industrial production. The research on this ellipsoidal pellet bed will provide comprehensive data support for the production process. Besides, the view factor is one of the important factors affecting the heat transfer of the multilayer pellet bed. It is of great significance to study its value and distribution. In this study, the effects of the gas field and the bottom of the furnace on the direct reduction of multilayer ellipsoidal pellets were considered. The local environmental viewing angle coefficient in the model was obtained through the mechanism calculation method, which is more accurate than the calculation through the radiation exchange network. Furthermore, the porosity variation in the pellet during the direct reduction process was also considered. According to the calculation, it was found that the higher initial temperature at the furnace bottom is beneficial to increase the degree of metallization (DOM) and zinc removal rate (ZRR) for all pellets, and is more advantageous to the lower pellets in the material bed. Nevertheless, the reduction degree of the lower pellets is still smaller than that of the upper pellets. The results also show that increasing the offset ξ has a greater effect on increasing the ambient view factor and each position reduction degree in the ellipsoidal pellets layer. Results can be applied for the optimization of pellets distribution in a rotary hearth furnace.

FIOR — The Esso fluid iron ore direct reduction process

JOM ◽  
1966 ◽  
Vol 18 (2) ◽  
pp. 237-242 ◽  
Author(s):  
J. W. Brown ◽  
D. L. Campbell ◽  
A. L. Saxton ◽  
J. W. Carr
Keyword(s):  
Iron Ore ◽  
Direct Reduction ◽  
Reduction Process ◽  
Direct Reduction Process

scholarly journals Optimization of the Iron Ore Direct Reduction Process through Multiscale Process Modeling

Materials ◽  
2018 ◽  
Vol 11 (7) ◽  
pp. 1094 ◽  
Author(s):  
Rami Béchara ◽  
Hamzeh Hamadeh ◽  
Olivier Mirgaux ◽  
Fabrice Patisson
Keyword(s):  
Process Modeling ◽  
Iron Ore ◽  
Direct Reduction ◽  
Reduction Process ◽  
Direct Reduction Process

scholarly journals Carbon Impact Mitigation of the Iron Ore Direct Reduction Process through Computer-Aided Optimization and Design Changes

Metals ◽  
2020 ◽  
Vol 10 (3) ◽  
pp. 367
Author(s):  
Rami Béchara ◽  
Hamzeh Hamadeh ◽  
Olivier Mirgaux ◽  
Fabrice Patisson
Keyword(s):  
Co2 Emissions ◽  
Iron Ore ◽  
Direct Reduction ◽  
Reduction Process ◽  
Industrial Sector ◽  
Direct Reduction Process ◽  
Design Changes ◽  
Computer Aided ◽  
Top Gas Recycling ◽  
Gas Recycling

The steel industry is known to have one of the highest environmental impacts on the industrial sector, especially in terms of CO2 emissions. The so-called direct reduction route, which makes use of reformed natural gas along with top gas recycling to reduce iron oxide pellets with H2 and CO, is responsible for lower CO2 emissions than the classic blast furnace route and is currently under development. The present article focuses on the direct reduction process and discusses means to further decrease the CO2 emission rate. A set of 10 operating parameters were simultaneously changed according to computer-aided optimization. The results provide about 15% improvement over original emissions for comparable output values.

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