Pulverized Coal Injection for High Injection Rates

Oliveira, André de; Mahowald, Pierre; Muller, Ben; Kinzel, Klaus-Peter; Oliveira, Victor Hugo de

doi:10.5151/2594-357x-28098

Cited by 3 publications

(1 citation statement)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In addition, the volatile matter content, which is a measure of the coal thermal pyrolysis products, is known to have an important effect on the blast furnace stability by influencing the gas/char combustion and consumption of oxygen in the raceway region [11,12]. The choice of coals injected in the furnace depend on their availability, cost, and properties and are often used as blends, variations of which can impact the stability [13].…”

Section: Introductionmentioning

confidence: 99%

A Comparison of Laboratory Coal Testing with the Blast Furnace Process and Coal Injection

Steer

Greenslade

Marsh

2021

Metals

View full text Add to dashboard Cite

The injection of coal through tuyeres into a blast furnace is widely adopted throughout the industry to reduce the amount of coke used and to improve the efficiency of the iron making process. Coals are selected depending on their availability, cost, and the physical and chemical properties determined by tests, such as the volatile matter content, fixed carbon, and ash content. This paper describes research comparing the laboratory measured properties of injection coals that were used over a two-month production period compared to the process variables and measurements of the blast furnace during that study period. In addition to the standard tests, a drop tube furnace (DTF) was used to compare the burnout of coals and the char properties against the production data using a range of statistical techniques. Linear regression modelling indicated that the coal type was the most important predictor of the coal rate but that the properties measured using laboratory tests of those coals were a minor feature in the model. However, comparisons of the Spearman’s correlations between different variables indicated that the reverse Boudouard reactivity of the chars, prepared in the DTF from the coals, did appear to be related to some extent to the coal and coke rates on production. It appears that the constant process adjustments made by the process control systems on the furnace make it difficult to identify strong correlations with the laboratory data and that the frequency of coal sampling and the coal blend variability are likely to contribute to this difficulty.

show abstract

Section: Introductionmentioning

confidence: 99%

A Comparison of Laboratory Coal Testing with the Blast Furnace Process and Coal Injection

Steer

Greenslade

Marsh

2021

Metals

View full text Add to dashboard Cite

show abstract

Blast Furnace: Most Efficient Technologies for Greenhouse Emissions Abatement

Cavaliere

2019

Clean Ironmaking and Steelmaking Processes

View full text Add to dashboard Cite

Technological advancements in evaluating the performance of the pulverized coal injection through tuyeres in blast furnace

Agrawal

Tiwari

Kumar

et al. 2020

Metall. Res. Technol.

View full text Add to dashboard Cite

The pulverized coal injection (PCI) is pursued to reduce the hot metal production cost by replacing the expensive metallurgical coke with the non-coking coal. Increasing the PCI rate causes various difficulties in the blast furnace (BF) operation. In the present work, an attempt is made to review the various aspects of PC injection in BF such as the challenges with increasing the PCI rate and modifications in the injection system to circumvent the concerns related to higher PCI rate. Various methods for detecting the tuyere blockage and failure caused due to the high PCI rate are elaborated. The factors influencing the combustion of coal in front of tuyeres have been discussed and their impact in the replacement ratio has been discussed. Further, recommendations are made to improve the coal combustibility in front of tuyeres.

show abstract

Pulverized Coal Injection for High Injection Rates

Cited by 3 publications

References 0 publications

A Comparison of Laboratory Coal Testing with the Blast Furnace Process and Coal Injection

A Comparison of Laboratory Coal Testing with the Blast Furnace Process and Coal Injection

Blast Furnace: Most Efficient Technologies for Greenhouse Emissions Abatement

Technological advancements in evaluating the performance of the pulverized coal injection through tuyeres in blast furnace

Contact Info

Product

Resources

About