Reduction process of Malaysian low grade iron ore using ammonia /
Malaysia has abundant low-grade iron ore from various iron ore mining area which are not suitable to be used directly in a blast furnace for ironmaking process. These low-grade ore were considered low-grade ore as the iron species content is less than 65%. These low-grade ores need to be treated fir...
Saved in:
| Main Author: | |
|---|---|
| Format: | Thesis |
| Language: | English |
| Published: |
Kuala Lumpur :
Kulliyyah of Engineering, International Islamic University Malaysia,
2017
|
| Subjects: | |
| Online Access: | Click here to view 1st 24 pages of the thesis. Members can view fulltext at the specified PCs in the library. |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| Summary: | Malaysia has abundant low-grade iron ore from various iron ore mining area which are not suitable to be used directly in a blast furnace for ironmaking process. These low-grade ore were considered low-grade ore as the iron species content is less than 65%. These low-grade ores need to be treated first as Malaysian low-grade contains high combined water and high impurities. Current used of coke as fuel in blast furnace emits high emission of carbon dioxide (CO2) and carbon monoxide (CO) which contributes to the environmental pollution. Hydrogen had become one of the alternatives of replacing coke as fuel. However, hydrogen gas is too light and hard to liquidified. These shortcomings make the transportation and storage of hydrogen a challenge to the iron making industries. Thus, there has been an increased interest in the hydrogen transportation medium as alternatives from the conventional process to produce and transport hydrogen. In this experiment, the use of Malaysian Low-grade iron ore by using ammonia decomposition were studied. In the first part of the experiment, the ore were prepared as the raw material. The ore were put into quartz tube reactor and were dehydrated at 400°C for 1 hour, then hydrogen reduced for 2 hours before undergone iron ore reduction using ammonia at temperature range of 500-700°C for 3 hours. Objectives of this thesis are to study the effect of temperature on the iron ore reduction and on the ammonia decomposition. The results show 95% of ammonia decomposed at a temperature of 700°C. Iron metallic phase was present at 700°C showing complete reduction of hematite phase to iron. The mechanism studies of iron ore show high metallic iron deposition on the surface of iron. The high pore formation during dehydration increases the surface area which in return increases the dispersion of iron particles on the surface of ore. The use of ammonia in reduction process of iron ore can assist in upgrading the iron ore into metallic iron. |
|---|---|
| Physical Description: | xiii, 84 leaves : illustrations ; 30cm. |
| Bibliography: | Includes bibliographical references (leaves 76-82). |