Beneficiation Study on an Oolitic Hematite

2013 ◽  
Vol 690-693 ◽  
pp. 202-205
Author(s):  
Jie Sun ◽  
Jin Zhu Zhang
Keyword(s):  
Iron Content ◽  
Iron Ore ◽  
Phosphorus Content ◽  
Acid Leaching ◽  
Iron And Steel Industry ◽  
Iron And Steel ◽  
Potential Source ◽  
Roasting Temperature ◽  
The Magnetic Field ◽  
Grinding Time

The oolitic hematite with a lower iron content and a higher phosphorus content will be a potential source of raw iron ore for the Chinese iron and steel industry. The magnetization reducing roasted and magnetic separation is a practical beneficiation process. The results show that the iron content in the concentrate can be increased to 57.63% from 45.95%, the iron recovery up to 73.12%, when the parameters are as follows, the roasting temperature is 900°C, the residence time 70 min, the ratio of reducing agent 5%, the grinding time 7 min, and the magnetic field strength 0.15T. The phosphorus content in the concentrate can be reduced to 0.23% from 0.39% by means of acid leaching.

Study on the Reduction of Oolitic Hematite Ores in N2-CO Atmosphere

2014 ◽  
Vol 968 ◽  
pp. 198-201
Author(s):  
Guang Long Jin ◽  
Jin Zhu Zhang ◽  
Ben Jun Xu ◽  
Song Yang
Keyword(s):  
Carbon Monoxide ◽  
Steel Industry ◽  
Iron Ore ◽  
Direct Reduction ◽  
Iron And Steel Industry ◽  
Iron And Steel ◽  
Reduction Time ◽  
Potential Source ◽  
Maximum Value ◽  
Metallization Rate

The oolitic hematite will be a potential source of raw iron ore for the Chinese iron and steel industry. Up to now, the oolitic hematite have hardly been utilized effectively by any single traditional technology. The direct reduction may be a practical technology for the exploitation of oolitic hematite. The results show that the metallization rate of the HeZhang oolitic hematite increases with both the partial pressure of CO increase and the reduction time lasted, and the maximum value of the metallization rate is obtained at 35% carbon monoxide in the N2-CO atmosphere and 4h reduction time at 1050°C with 10% calcium oxide in the oolitic hematite. The diffusion may be the primary factor controlled the metallization rate in the later stage of reduction.

Study on Deep Reduction of Oolitic Hematite Assisted with Microwave Radiation

2014 ◽  
Vol 941-944 ◽  
pp. 2574-2577
Author(s):  
Zhi Hong Ma ◽  
Jin Zhu Zhang ◽  
Wei Li ◽  
Jing Chen
Keyword(s):  
Microwave Radiation ◽  
Residence Time ◽  
Steel Industry ◽  
Iron Ore ◽  
Iron And Steel Industry ◽  
Reduction Temperature ◽  
Iron Recovery ◽  
Iron And Steel ◽  
Potential Source ◽  
Metallization Rate

The oolitic hematite will be a potential source of raw iron ore for the Chinese iron and steel industry. Up to now, the oolitic hematite have hardly been utilized effectively by any single traditional technology. The deep reduction assisted with microwave radiation may be a practical technology for the exploitation of oolitic hematite. The results show that the metallization rate can be obtained to 88.91%, and the iron recovery up to 90.70% for the oolitic hematite with an iron content 51.19%, when the deep reduction parameters are as follows, the reduction temperature is 1050°C, the residence time is 45min, and the ratio of reducing agent is 24%.

scholarly journals The Prospects of Uganda’s Iron Ore Deposits in Developing the Iron and Steel Industry

2020 ◽  
Vol 08 (04) ◽  
pp. 316-329
Author(s):  
Muwanguzi J. B. Abraham ◽  
Rukezo Gift ◽  
Sebukeera Hennery ◽  
Guloba Asuman ◽  
Ajidiru Rita ◽  
...  
Keyword(s):  
Steel Industry ◽  
Iron Ore ◽  
Ore Deposits ◽  
Iron And Steel Industry ◽  
Iron And Steel ◽  
Iron Ore Deposits

The Iron and Steel Industry in Colonial and Imperial Brazil

1962 ◽  
Vol 19 (2) ◽  
pp. 172-184 ◽  
Author(s):  
Edward J. Rogers
Keyword(s):  
Latin America ◽  
Steel Industry ◽  
Iron Ore ◽  
Sao Paulo ◽  
Ore Deposits ◽  
Iron And Steel Industry ◽  
São Paulo ◽  
Iron And Steel ◽  
Iron Ore Deposits ◽  
Iron Working

It is a well known fact that Brazil today is the greatest producer of iron and steel in all of Latin America. It is less well known that this industry is one of the oldest in the nation. Any effort to trace the development of this iron-working industry from its earliest sources should take into consideration the contributions of the Jesuits. As early as 1554, Father José Anchieta informed his Jesuit superiors and the king of Portugal of the existence of iron ore deposits in the interior of the captaincy of São Vicente (later São Paulo). Even more important in this respect was a forge established by the Jesuit Mateus Nogueira which in 1556 was instrumental in the manufacture of fishhooks, knives, wedges, shovels and other such implements used in the support of his community. These are claimed to be the first implements made from iron in Brazil.

scholarly journals Laboratory test and analysis of recovery from separation of iron sand using magnetic separator

2021 ◽  
Vol 882 (1) ◽  
pp. 012015
Author(s):  
I Permatasari ◽  
C Palit ◽  
Subandrio
Keyword(s):  
Iron Ore ◽  
Magnetic Force ◽  
Current Strength ◽  
Raw Material ◽  
Iron And Steel Industry ◽  
Sand Mining ◽  
Magnetic Separator ◽  
Iron And Steel ◽  
Sand Material ◽  
A Current

Abstract The iron sand mining is a prevalent practice because such a material is a mineral with many uses, including as a raw material in the iron and steel industry. In mining, iron sand certainly carries other minerals as impurity minerals. Thus the iron sand needs a further processing to increase the content of the iron itself. The widely used method is using a magnetic separator since the iron ore is a material that is strongly attracted by magnetic force. In contrast, the impurity material is repelled by magnetic forces so that the separation of iron sand from impurities can be carried out properly. The purpose of this study is to increase the content of valuable minerals available in the iron sand material. The variables used in this study includes the strong electric current and the size of iron sand. This study obtained a maximum result at a material size of 100 mesh with a current strength of 5 amperes with the acquisition of concentrates as much as 165,189 grams and a recovery value of 65,041%.

Evaluation of Heat Absorption in Iron Ore Using Microwave Energy Source

2014 ◽  
Vol 802 ◽  
pp. 367-372
Author(s):  
L.M. Silva ◽  
M. Nascimento ◽  
I.O. Mota ◽  
Marcio T. Fernandes ◽  
J.A. Castro
Keyword(s):  
Iron Ore ◽  
Phosphorus Content ◽  
Rietveld Method ◽  
Rapid Heating ◽  
Acid Leaching ◽  
Microwave Energy ◽  
Additional Energy ◽  
Cooling Rates ◽  
Heating And Cooling ◽  
Short Period

The phosphorus content has significant effect on the steels quality and their applications. The iron ore resources around the world has continuously increased the amount of phosphorous due to the increase of the mining volume with less sterile generation aiming at the efficient utilization of the mining resources, as consequence larger amount of materials with high iron content but with higher phosphorous has been incorporated in the mining body. An alternative to enhance the mining efficiency is to perform a pre treatment of part of the mining body and subsequent blending to attain the acceptable phosphorous in the steelmaking. A viable alternative for reducing the phosphorus content of these residue is to use the acid leaching process which is considered an economical process for the dephosphorization of the iron ore, however, depending on the way the element phosphorus is contained in the ore it will demand additional energy. The objective of the present paper is to study the effective heating and cooling rates of iron ore using microwave energy and its subsequent cooling effect in a short period (thermal shock). Through the X-ray diffraction analysis and applying the Rietveld method it has been possible to demonstrate the mineralogical composition of the iron ore samples and the effect of rapid heating and cooling suitable to promote the fissure formation, thus enhancing the leaching efficiency. The scanning electron microscopy (SEM) was used to analyze the structure of ore due to the effect of its heating and cooling rates.

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