Important iron ore characteristics and their impacts on sinter quality — a review

2015 ◽  
Vol 32 (2) ◽  
pp. 88-96 ◽  
Author(s):  
L. Lu
Keyword(s):  
Iron Ore ◽  
Sinter Quality

Influence of Coating Granulation Process on Iron Ore Sinter Quality and Productivity

2010 ◽  
Vol 81 (9) ◽  
pp. 716-723 ◽  
Author(s):  
T. Umadevi ◽  
A.V. Deodhar ◽  
P.C. Mahapatra ◽  
M. Prabhu ◽  
Madhu Ranjan
Keyword(s):  
Iron Ore ◽  
Granulation Process ◽  
Sinter Quality ◽  
Iron Ore Sinter

Investigation of a granule structure that focused on reducing NOx emissions in sintering process

2019 ◽  
Vol 116 (3) ◽  
pp. 315
Author(s):  
Junmao Qie ◽  
Chunxia Zhang ◽  
Haifeng Wang ◽  
Yuhua Guo ◽  
Shengli Wu
Keyword(s):  
Iron Ore ◽  
Calcium Ferrite ◽  
Emissions Reduction ◽  
Test Results ◽  
Sintering Process ◽  
Sinter Quality ◽  
Iron Ore Sintering ◽  
Granule Structure ◽  
Iron Ore Sintering Process ◽  
Ore Sintering

The pressure to reduce NOx emissions in iron ore sintering process is enlarging increasingly. The paper proposed a sintering granulation method to reduce NOx emissions. The main character of the method was to wrap all fuel on the surface of the pellet, and also increased the contact between iron ore and fluxes. The sinter-pot test results showed that NOx emissions of the method reduced by 19.9% and sinter quality improved, while SO2 emissions increased by 17.7% compared with that of the conventional method. The increase in the reducing atmosphere of the sinter bed and the development of calcium ferrite in sinter were the main causes of NOx emissions reduction and the improvement of the sinter quality. In addition, the promotion of the combustion of fuel resulted in the increase in SO2 emissions. The improvement of the sinter quality and the control of the sintering flue gas pollutants can also be realized through adjusting the distribution of fuel, fluxes and iron ore in the pellet reasonably.

scholarly journals Modified coke breeze distribution in iron ore sintering - a novel technique of reducing energy consumption and improving quality

2021 ◽  
Vol 57 (1) ◽  
pp. 73-82
Author(s):  
J. Pal ◽  
D. Prasad ◽  
T. Venugopalan
Keyword(s):  
Energy Consumption ◽  
Iron Ore ◽  
Coke Breeze ◽  
Lower Amount ◽  
Sinter Quality ◽  
Iron Ore Sintering ◽  
Triple Layer ◽  
Ore Sintering ◽  
Bottom Heat ◽  
Reducing Energy

In normal sintering of iron ore, there is a wide difference in temperature of the sinter bed between top and bottom; i.e. the flame front temperature of the sinter bed gradually increases towards the bottom because the lower part gets longer time for drying and preheating by exit gas. Therefore, the top part may have insufficient fusion and the bottom is excessively fused. Thus, sinter quality may become inhomogeneous and the coke breeze requirement becomes higher than the actual thermal requirement. If it is charged in multiple layers; e.g. higher amount of coke at the top and a lower amount of coke at the bottom, heat will be homogeneously distributed and the actual coke requirement would be lower than the existing. However, no study has been done so far on this. Therefore, the current study explores the possibility of reducing energy consumption in iron ore sintering by reducing the coke ratio from top to bottom without deteriorating the sinter property. 12% reduction in coke breeze rate has been found and the sinter quality has been improved by the use of a triple layer of sinter mix with a lower coke rate towards the bottom. Further, when 5-vol% of oxygen has been enriched in suction gas along with using a triple layer of sinter mix, up to an 18-wt% reduction in coke breeze has been found.

scholarly journals Microstructure and Minerals Evolution of Iron Ore Sinter: Influence of SiO2 and Al2O3

Minerals ◽  
2019 ◽  
Vol 9 (7) ◽  
pp. 449 ◽  
Author(s):  
Ji ◽  
Zhao ◽  
Gan ◽  
Fan ◽  
Chen ◽  
...  
Keyword(s):  
Mechanical Strength ◽  
Calcium Silicate ◽  
Iron Ore ◽  
Sio2 Content ◽  
Al2o3 Content ◽  
Sinter Quality ◽  
Iron Ore Sinter ◽  
Research Findings ◽  
Functional Mechanisms ◽  
Sintering Processes

SiO2 and Al2O3 are two important minerals that can affect the mechanical and metallurgical properties of sinter. This investigation systematically studied the influences of these minerals and revealed their functional mechanisms on sinter quality. Results showed that with an increasing Al2O3 content in sinter, the sintering indexes presented an improvement before the content exceeded 1.80%, while the quality decreased obviously after the content exceeded 1.80%. With an increasing SiO2 content, the sinter quality presented a decreasing tendency, especially when the content exceeded 4.80%. Consequently, the optimal content of Al2O3 was ≤1.80% and that of SiO2 was ≤4.80%. The evolution of the microstructure and minerals in sinter showed that enhancing the Al2O3 content increased the proportion of SFCA generated, which improved the sinter’s mechanical strength, while excessive Al2O3 led to the formation of sheet-like SFCA with weak mechanical strength. Increasing the content of SiO2 strained the formation of SFCA and promoted the formation of calcium silicate, the mechanical strength of which is lower than that of SFCA. The research findings will be useful in guiding practical sintering processes.

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