scholarly journals Chemical Fingerprints for PM2.5 in the Ambient Air near a Raw Material Storage Site for Iron Ore, Coal, Limestone, and Sinter

2021 ◽  
Vol 21 ◽  
Author(s):  
Kavita Justus Mutuku ◽  
Yen-Yi Lee ◽  
Guo-Ping Chang-Chien ◽  
Sheng-Lun Lin ◽  
Wei-Hsin Chen
Keyword(s):  
Iron Ore ◽  
Ambient Air ◽  
Raw Material ◽  
Storage Site ◽  
Chemical Fingerprints

Adjustment of a technology of cast iron smelting in the blast furnace of jsc "ural steel" w ith a volume of 1232 см3 with charge h a v in g 95% share of Mikhailovskii GOK pellets

2021 ◽  
Vol 77 (7) ◽  
pp. 768-775
Author(s):  
I. F. Iskakov ◽  
G. A. Kunitsyn ◽  
D. V. Lazarev ◽  
А. А. Red`kin ◽  
S. A. Trubitsyn ◽  
...  
Keyword(s):  
Blast Furnace ◽  
Iron Ore ◽  
Raw Materials ◽  
Raw Material ◽  
Material Base ◽  
Hot Metal ◽  
Charging System ◽  
Iron Smelting ◽  
Gas Consumption ◽  
A Charge

To use effectively internal raw material base, JSC “Ural Steel” accomplished I category major overhaul of the blast furnace No. 2. The main purpose of the overhaul was to design a rational profile which could ensure an ability to operate with a charge containing 95 % of Mikhailovskii GOK (mining and concentrating plant) pellets having basicity of 0.5 by CaO/SiO2. The blast furnace No. 2 having useful volume of 1232 m3, was constructed by design of Danieli Corus, the Netherlands, and was blown in on December 30, 2020. In the process of guarantee tests, step-by-step increase of Mikhailovskii GOK pellets (Fetotal = 60.5 %, CaO/SiO2 = 0.5) content in the charge iron ore part was being accomplished from 55 to 95.1%. Charging of the blend containing pellets in the amount of 55% of iron ore part, was done by charging system 4OOCC + 1COOCC (Ore - Coke) with filling level 1.5 m. Under conditions of pellets part increase in the blend, the charging system was changed to decrease their content at the periphery, to increase it in the ore ridge zone and make it intermediate between periphery and the ore ridge. At the pellets share in the iron ore raw materials 0.75 the charging system was used as the following: 3OOCC + 1COOC + 1COOCC, while at the content 95.1% the following charging system was used: 2COOC + 2COOC + 1COOCC. It was noted that in the period of guarantee tests the furnace running was smooth. The average silicon content in the hot metal was 0.70% at the standard deviation 0.666. Sulfur content in the hot metal did not exceed 0.024%, the blowing and natural gas consumption figures were 2100 m3/min and 11000 m3/min correspondently, oxygen content in the blowing 26.5%, hot blowing and top smoke pressure figures were 226.5 and 109.8 KPa correspondently. The productivity of the furnace was reached as high as 2358 t/day at the specific coke rate 433 kg/t of hot metal. After guarantee tests completion, the pellets content in the iron ore part was decreased gradually from 95 down to 50%. The decreasing was made by 5% in every 6 hours of operation. Application of the mastered technology of the blast furnace No. 2 with the increased share of pellets will enable to stably supply the blast furnaces No. 1, 3 and 4 by iron ore raw materials in the proportion of 30-35% of pellets and 65-70% of sinter.

scholarly journals GLOBALIZATION AS A CHALLENGE TO UKRAINIAN EXPORTERS OF IRON ORE RAW MATERIAL

2018 ◽  
Vol 4 (1) ◽  
pp. 85-92
Author(s):  
Olha Hrybinenko ◽  
◽  
Svitlana Shahoian ◽  
Keyword(s):  
Iron Ore ◽  
Raw Material

A Study on Energy Consumption and CO2 Emissions According to Manufacture of Recycled Rebar Using Wasted Steel from Building Demolition

2013 ◽  
Vol 357-360 ◽  
pp. 869-875
Author(s):  
Gi Wook Cha ◽  
Won Hwa Hong ◽  
Sung Woo Shin
Keyword(s):  
Energy Consumption ◽  
Iron Ore ◽  
Ghg Emissions ◽  
Raw Material ◽  
Input Output ◽  
Output Analysis ◽  
Input Output Analysis ◽  
Ghg Reduction ◽  
The Comparative Study ◽  
Building Demolition

In recent year, Korea relies on imports for most of the iron ore, the main raw material of rebar, resulting in CO2 pollution with lots of energy consumption. Hereupon, this study carried out the research on the energy consumption and CO2 emissions of the recycled rebar using the wasted steel from building demolition. For that, this study worked out the energy consumption and CO2 emissions in the process of generation, transportation and production of wasted steel and, on the basis of which, it conducted the comparative study with virgin materials. The major research results are as follows: First, the energy consumption and CO2 emissions of the recycled rebar were found to be highest in the process of its production at 89.2% and 85%, respectively. In addition, in the comparison between recycled rebar and virgin material, the former was found to be most advantageous in energy consumption. On the contrary, as for CO2 emissions, the recycled rebar showed a 88.3% reduction possibility of greenhouse gas (GHG) emissions comparing to statistics of input-output analysis based on competition inducement coefficient, but it was found to be more disadvantageous from the perspective of GHG reduction than the statistics of input-output analysis based on non-competition inducement coefficient.

Reduction of Composite Pellet Containing Indonesia Lateritic Iron Ore as Raw Material for Producing TWDI

2013 ◽  
Vol 281 ◽  
pp. 490-495 ◽  
Author(s):  
Adji Kawigraha ◽  
Johny Wahyuadi Soedarsono ◽  
Sri Harjanto ◽  
Pramusanto
Keyword(s):  
Blast Furnace ◽  
Iron Ore ◽  
Raw Material ◽  
Pig Iron ◽  
Blast Furnace Process ◽  
Composite Pellet ◽  
Furnace Process ◽  
Iron Phase ◽  
Reductive Atmosphere ◽  
Reduced Pellets

Blast furnace process is still an important process for producing pig iron. The process needs high grade iron ore and coke. The two materials can not be found easily. In addition blast furnace process needs cooking and sintering plant that produces polluted gases. Utilization of composite pellet for pig iron production can simplify process. The pellet is made of iron ore and coal. In addition the pellet can be made from other iron source and coal. This paper discusses the evolution of phase during reduction of composite pellet containing lateritic iron ore. Fresh iron ore and coal were ground to 140 mesh separately. They were mixed and pelletized. The quantity of coal added was varied from 0 %, 20 % and 29 % of pellet weight. Pellets were heated with 10 °C/minute to 1100 °C, 1200 °C, 1300 °C and 1350 °C in a tube furnace and temperature was held during 10 minutes. Heated pellets were analyzed with XRD equipment. XRD of reduced pellets showed that iron phase change with coal and temperature. Lack of coal during heating results the re-oxidation of iron phases. This process is due to replacement of reductive atmosphere by oxidative atmosphere.

Effect of raw material particle size on XRF analysis for process control of iron ore sinter.

1988 ◽  
Vol 37 (11) ◽  
pp. 607-611
Author(s):  
Kazumi MIZUKAMI ◽  
Shigeo KASAI ◽  
Naoki KASAI ◽  
Kazuhiko AMAKAWA
Keyword(s):  
Particle Size ◽  
Process Control ◽  
Iron Ore ◽  
Raw Material ◽  
Material Particle ◽  
Xrf Analysis ◽  
Iron Ore Sinter

Flotation to Recover Copper Minerals from a Low-Grade Copper-Bearing Iron Ore

2012 ◽  
Vol 549 ◽  
pp. 998-1001
Author(s):  
Si Qing Liu ◽  
Peng Li ◽  
Shu Ming Wen ◽  
Dian Wen Liu
Keyword(s):  
Magnetic Separation ◽  
Phase Analysis ◽  
Iron Ore ◽  
Processing Technology ◽  
Raw Material ◽  
Low Grade ◽  
Copper Concentrate

Large amount of sourrounding rocks in Jianshui China has been discarded for many years, and the “rock” is characterized by Cu-Fe polymetallic constituents and of low grade. According to the results of chemical and phase analysis as well as the mineralogy, a joint pocess of flotation and magnetic separation was proposed and used to process the ore. Flotation results show that the combined processing technology is efficient in utilizing the low grade rocks. A copper concentrate assaying 20.68% Cu at the recovery of 80.11% can be obtained, when the raw material assays 0.79% Cu.

Conservation of the Structure and Materials of Historic Masonry Walls

2014 ◽  
Vol 624 ◽  
pp. 354-362
Author(s):  
Jerzy Jasienko ◽  
Łukasz Bednarz ◽  
Dariusz Bajno
Keyword(s):  
Sedimentary Rock ◽  
Iron Ore ◽  
Retaining Wall ◽  
Raw Material ◽  
Masonry Walls ◽  
High Porosity ◽  
Historic Masonry ◽  
Iron Smelting ◽  
Additional Protection ◽  
The Status

The paper presents a structural analysis, restoration programme and scope of conservation work essential for protecting historical values based on the example of an overstretched retaining wall providing support for the embankment of an heritage church. The focus was on analysing the status of an historic stone wall constructed in part with bog iron ore (metal ore or iron-rich sedimentary rock). Ore was used for iron smelting and also as a building material. Bog iron ore was frequently used in construction across Poland, especially in places where the raw material was locally available, aesthetically attractive and had mechanical properties approximating the durability of ceramic bricks. The material was characterised by high porosity, low resistance to diffusion and high resistance to freezing, which meant that it could be used successfully in structures subjected to atmospheric impacts without additional protection

Study on the Effect on Sintering Mineralization of Iron Ore

2013 ◽  
Vol 652-654 ◽  
pp. 2538-2542 ◽  
Author(s):  
Xiao Hui Fan ◽  
Ying Li ◽  
Xu Ling Chen
Keyword(s):  
Grain Size ◽  
Regression Analysis ◽  
Chemical Composition ◽  
Iron Ore ◽  
Raw Material ◽  
Sintering Process ◽  
Main Effect ◽  
Relationship Model ◽  
Ore Mineralization ◽  
The Relationship

The main effect on iron ore mineralization performance in the sintering process is the grain size of raw material and chemical composition. The results show that -0.5mm particles can mineralize, but +0.5mm particles remain a nucleus in sinter. This paper analyses the effect of the chemical composition on mineralization characteristics of liquid production. The relationship model is established by using regression analysis between the chemical composition and liquid formation characteristics. The mian factors of mineralization in the chemical composition: SiO2, CaO, MgO and Al2O3.

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