Thermodynamic Analysis of Iron Ore Sintering Process Based on Biomass Carbon

The sinter process of iron ore with biomass carbon instead of coke breeze as fuel was investigated via thermodynamic analysis in this paper through a comparison of sinter composition indexes, metallurgical properties, and pollutant emissions. Straw charcoal was used in this paper, and its replacement does not adversely affect the composition index of iron ore, namely Fe, FeO, basicity, S, nor the metallurgical properties, namely reduction degradation index and reduction index. However, the replacement has a great effect on the emissions of pollutant gases, including SO2, NOx, CO, and CO2. The thermodynamic analysis result shows that emissions of pollutant gases produced in the sinter process significantly decrease by using straw charcoal instead of coke breeze in sinter. The sintering maximum temperature has a great influence on sintering technical indicators. The best sintering maximum temperature is between 1300 and 1400 °C, where sinter ore with high quality can be obtained.

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Thermodynamic analysis of Al O (g) and phase and micro-structure evolution of the resin bonded Al–Al2O3–ZrO2 refractories under air embedded in coke breeze

Journal of Alloys and Compounds ◽

10.1016/j.jallcom.2020.157216 ◽

2021 ◽

Vol 855 ◽

pp. 157216

Author(s):

Mingwei Yan ◽

Kaiqi Liu ◽

Yong Li ◽

Jiazhuang Liu ◽

Guangchao Sun ◽

...

Keyword(s):

Thermodynamic Analysis ◽

Coke Breeze ◽

Structure Evolution ◽

Micro Structure

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Characterization of Air-Quality Degradation Episodes of PM10 in the Metropolitan Area of São Paulo and Their Relationship with Meteorological Conditions

Environmental Sciences Proceedings ◽

10.3390/ecas2020-08143 ◽

2020 ◽

Vol 4 (1) ◽

pp. 8

Author(s):

Maria C. Q. D. Oliveira ◽

Luciana V. Rizzo ◽

Anita Drumond

Keyword(s):

Air Quality ◽

Metropolitan Area ◽

Sao Paulo ◽

Meteorological Conditions ◽

Pollutant Emissions ◽

Maximum Temperature ◽

São Paulo ◽

Urban Centers ◽

Duration Distribution ◽

Air Quality Monitoring Stations

Air pollution is one of the main environmental problems in large urban centers, affecting people’s health and impacting quality of life. The Metropolitan Area of São Paulo (MASP) presents frequent exceedances of air-quality standards in inhalable particulate matter (PM10), a consequence of pollutant emissions modulated by meteorological conditions. This study aims to identify and characterize PM10persistent exceedance events (PEE) inthe MASP between 2005 and 2017, relating them to meteorological conditions. The criteria used to select the events were: (i) events that occurred in at least 50% of the air-quality monitoring stations chosen for this study and, (ii) among the events that met the first criterion, those with a duration equal to or greater than five days, which correspond to the 80% percentile of the event duration distribution. A total 71 persistent episodes of exceedance were selected. The results show that the exceedance of PM10 lasted up to 14 consecutive days and was predominant in the austral winter, accompanied by an increase in maximum temperature (T), a decrease in wind speed (WS) and relative humidity (RH), and a wind direction predominantly from the northwest during the peak concentration of the pollutant. On average, a concentration increase of 60% was observed at the peak of the PEE.

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Effect of the catalyzing combustion of coke breeze on the energy saving in sinter process

Journal of Central South University of Technology ◽

10.1007/s11771-001-0061-0 ◽

2001 ◽

Vol 8 (4) ◽

pp. 234-238

Author(s):

De-qing Zhu ◽

Guan-zhou Qiu ◽

Tao Jiang ◽

Bao-jun Zhu

Keyword(s):

Energy Saving ◽

Sinter Process ◽

Coke Breeze

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Effects of anthracite replacing coke breeze on iron ore sintering

Revue de Métallurgie ◽

10.1051/metal:2008038 ◽

2008 ◽

Vol 105 (5) ◽

pp. 248-254 ◽

Cited By ~ 1

Author(s):

Deog-Won Ri ◽

Byung-Jun Chung ◽

Eung-Soo Choi

Keyword(s):

Iron Ore ◽

Coke Breeze ◽

Iron Ore Sintering ◽

Ore Sintering

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Comprehensive Effect of Coke Breeze and Limestone Particle Size on Sinter Performance in Sintering of a Coarse Hematite Iron Ore

4th International Symposium on High-Temperature Metallurgical Processing ◽

10.1002/9781118663448.ch57 ◽

2013 ◽

pp. 469-476

Author(s):

Zhe Wang ◽

Jianliang Zhang ◽

Xiangdong Xing ◽

Shan Ren ◽

Bing Gao ◽

...

Keyword(s):

Particle Size ◽

Iron Ore ◽

Coke Breeze

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Development of the Process for Obtaining Iron-Ore Pellets with Required Metallurgical Properties

Materials Science Forum ◽

10.4028/www.scientific.net/msf.946.450 ◽

2019 ◽

Vol 946 ◽

pp. 450-455

Author(s):

Boris Yur'ev ◽

Vyacheslav Dudko

Keyword(s):

Iron Ore ◽

Raw Materials ◽

Heating Rates ◽

Blast Furnace Smelting ◽

Metallurgical Properties ◽

Ore Pellets ◽

Oxidation Reduction ◽

Strength Behavior ◽

Fluxed Pellets ◽

Furnace Smelting

We have studied the influence of oxidation-reduction reactions on the structure and strength behavior of the Kachkanar fluxed pellets both in their initial condition and during reduction. It has been discovered that at heating rates and temperatures found in industrial units the roasted pellets that are not oxidized to a full extent and are characterized by zonal structure do not meet the requirements imposed for the blast-furnace smelting raw materials. To develop a process that would ensure high metallurgical properties, we have analyzed the hematite dissociation reaction. It was found that the temperature and the content of slag-forming oxides influence this reaction. A sinter pot was used to carry out the research and determine metallurgical properties of partially dissociated pellets. The obtained results helped to develop a process to dissociate hematite at lower temperatures with calcium ferrosilicate melt. Such pellets are reduced at the temperatures of over 700оС, which prevents their destruction in blast furnaces.

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