scholarly journals Analysis of the Influence of Biomass Addition in Coal Mixture for Metallurgical Coke Production

2021 ◽  
pp. 1-9
Author(s):  
Alex M. A. Campos ◽  
Paulo S. Assis
Keyword(s):  
Blast Furnace ◽  
Co2 Emissions ◽  
Environmental Issues ◽  
Coke Production ◽  
Partial Replacement ◽  
Metallurgical Coke ◽  
Hot Metal ◽  
Short Term ◽  
Metal Production ◽  
Coal Mixture

Metallurgical coke is a common material used for hot metal production in blast furnaces. In addition to the fuel function, it has a physical assignment, supporting the load inside the reactor, and chemical, supplying carbon to hot metal. However, due to growing discourse on environmental issues, the production of hot metal via coke blast furnace has been in evidence. This process is responsible for about 70% of CO2 emissions in steelmaking. On the other hand, biomasses are materials that are available in different ways in nature and considered neutral in CO2 emissions since they absorb this gas and release oxygen in the photosynthesis process. Thus, a viable alternative in the short term is the partial replacement of the coal used in coke production with biomass, which would generate environmental gains, and guarantee the sustainable production. Therefore, this work aims to show several published researches using biomass in coke production. The effects that biomass has on the properties of coke will be emphasized, and at the end, an environmental analysis will be shown with the possible use of biomass. It will be possible to see that it is possible to substitute between 2 and 10% of the coal for biomass, producing coke with the characteristics required in the blast furnace.

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

2020 ◽  
Vol 117 (6) ◽  
pp. 611
Author(s):  
Ashish Agrawal ◽  
Rohit Kumar Tiwari ◽  
Sanjiv Kumar ◽  
Rajeswar Chatterjee ◽  
Basant Kumar Singh ◽  
...  
Keyword(s):  
Blast Furnace ◽  
Pulverized Coal ◽  
Injection System ◽  
Metallurgical Coke ◽  
Hot Metal ◽  
Metal Production ◽  
Replacement Ratio ◽  
Pulverized Coal Injection ◽  
Factors Influencing ◽  
Coal Injection

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.

Enhancement of the productivity of non-recovery stamp charge coke oven plant at JSPL Raigarh

2020 ◽  
Vol 117 (6) ◽  
pp. 617
Author(s):  
Rupak Ranjan ◽  
H.P. Tiwari ◽  
P.K. Srivastava ◽  
Mansingh S. Raghuwanshi ◽  
Ashwani Kumar Jaiswal ◽  
...  
Keyword(s):  
Coke Quality ◽  
Production Capacity ◽  
Coke Oven ◽  
Coke Production ◽  
Metallurgical Coke ◽  
Recent Past ◽  
Hot Metal ◽  
Metal Production ◽  
Blast Furnace Coke ◽  
Furnace Coke

In recent past, Jindal Steel & Power Limited, Raigarh unit, has increased the hot metal production capacity by the renovation of the existing blast furnaces. Therefore, the blast furnace coke demand has increased. This excess demand for metallurgical coke production from the existing non-recovery stamp charge coke oven plant was a very tough challenge, because the coke oven plant was already running at rated production capacity. Therefore, to fulfill the requirement of excess coke and to deliver more value to the customers, several initiatives have been taken by the Coke Oven and Technical Services Department within the existing setup. Few approaches had been adopted to increase the productivity of coke by ∼20% without deteriorating the resultant coke quality. This paper describes in details the steps taken to enhance the productivity of non-recovery stamp charge coke oven plant.

scholarly journals Utilization of Organic Mixed Biosludge from Pulp and Paper Industries and Green Waste as Carbon Sources in Blast Furnace Hot Metal Production

2021 ◽  
Vol 13 (14) ◽  
pp. 7706
Author(s):  
Tova Jarnerud ◽  
Andrey V. Karasev ◽  
Chuan Wang ◽  
Frida Bäck ◽  
Pär G. Jönsson
Keyword(s):  
Blast Furnace ◽  
Carbon Sources ◽  
Hydrothermal Carbonization ◽  
Pulp And Paper ◽  
Hot Metal ◽  
Technological Parameters ◽  
Metal Production ◽  
Green Waste ◽  
Fuel Rate ◽  
Pulp And Paper Industries

A six day industrial trial using hydrochar as part of the carbon source for hot metal production was performed in a production blast furnace (BF). The hydrochar came from two types of feedstocks, namely an organic mixed biosludge generated from pulp and paper production and an organic green waste residue. These sludges and residues were upgraded to hydrochar in the form of pellets by using a hydrothermal carbonization (HTC) technology. Then, the hydrochar pellets were pressed into briquettes together with commonly used briquetting material (in-plant fines such as fines from pellets and scraps, dust, etc. generated from the steel plant) and the briquettes were top charged into the blast furnace. In total, 418 tons of hydrochar briquettes were produced. The aim of the trials was to investigate the stability and productivity of the blast furnace during charging of these experimental briquettes. The results show that briquettes containing hydrochar from pulp and paper industries waste and green waste can partially be used for charging in blast furnaces together with conventional briquettes. Most of the technological parameters of the BF process, such as the production rate of hot metal (<1.5% difference between reference days and trial days), amount of dust, fuel rate and amount of injected coal, amount of slag, as well as contents of FeO in slag and %C, %S and %P in the hot metal in the experimental trials were very similar compared to those in the reference periods (two days before and two days after the trials) without using these experimental charge materials. Thus, it was proven that hydrochar derived from various types of organic residues could be used for metallurgical applications. While in this trial campaign only small amounts of hydrochar were used, nevertheless, these positive results support our efforts to perform more in-depth investigations in this direction in the future.

Production of SG Grade Pig Iron in Mini Blast Furnace

2013 ◽  
Vol 634-638 ◽  
pp. 3174-3180
Author(s):  
Madan Mohan Mahato ◽  
Mahesh Kumar Agrawal ◽  
Sharda Nand Sinha
Keyword(s):  
Blast Furnace ◽  
Metallurgical Coke ◽  
Chemical Compositions ◽  
Pig Iron ◽  
Hot Metal ◽  
Efficient Operation ◽  
Demand And Supply ◽  
Slag Chemistry ◽  
Capital Intensive

The entire life of a Blast furnace operator is spent to achieve the following aims: • To increase the productivity of Blast Furnace as high as possible. • To decrease the coke rate as low as possible to produce unit ton of hot metal. • To produce the hot metal of superior SG quality with particular reference to Sulphur & Silicon. • To keep the production cost as low as possible. The process indices of Mini Blast Furnace are similar to that of a conventional blast furnace. But, conventional blast furnace is capital intensive, solely dependent on good quality metallurgical coke, the gestation period is longer, and requires elaborate burden preparation. There is huge gap between demand and supply of steel in India. Also, India is dreaming to become developed nation by 2020. In such situations, the role of Mini Blast Furnace becomes very important. The slag chemistry is an important parameter to improve the process indices of MBF. The slag chemistry includes its chemical composition, liquidus temperature, fluidity, Sulphide capacity etc, which has an important bearing on the smooth & efficient operation of the MBF. The main important constituent of SG grade pig iron, particularly, Sulphur & silicon content should be 0.040% maximum and 1.20% to 2.20% maximum respectively. The chemical compositions of SG Grade Pig Iron is C- 3.80-4.20%, Mn – 0.35- 0.80%, Si – 1.20- 2.20%, S - 0.040% maximum and P – 0.15% maximum. The role of slag to produce such a low sulphur & low silicon in Mini Blast Furnace is very important. Therefore, to control Sulphur and silicon in SG Grade Pig Iron in Mini Blast Furnace, the optimisation of Slag Chemistry is an essential step.

Ecological hot metal production using the coke plant and blast furnace route

2005 ◽  
Vol 102 (3) ◽  
pp. 171-182 ◽  
Author(s):  
P. Schmöle ◽  
H.-B. Lüngen
Keyword(s):  
Blast Furnace ◽  
Coke Plant ◽  
Hot Metal ◽  
Metal Production

Integration of the Blast Furnace Route and the FINEX®-Process for Low CO2 Hot Metal Production

2012 ◽  
Vol 83 (2) ◽  
pp. 181-188 ◽  
Author(s):  
Christoph Thaler ◽  
Tamara Tappeiner ◽  
Johannes L. Schenk ◽  
Werner L. Kepplinger ◽  
Jan Friedemann Plaul ◽  
...  
Keyword(s):  
Blast Furnace ◽  
Hot Metal ◽  
Metal Production ◽  
Low Co2

scholarly journals Wear-Model-Based Analysis of the State of Blast Furnace Hearth

2022 ◽  
Author(s):  
Mikko Helle ◽  
Henrik Saxén ◽  
Bart de Graaff ◽  
Cornelis van der Bent
Keyword(s):  
Blast Furnace ◽  
Heat Conduction Problem ◽  
Poor Performance ◽  
Inverse Heat Conduction Problem ◽  
Force Balance ◽  
Inverse Heat Conduction ◽  
Hot Metal ◽  
Wear Model ◽  
Metal Production ◽  
Erratic Behavior

AbstractThe condition and state of the hearth of the blast furnace is of considerable importance since the life length of the refractories governs the campaign length of the furnace, but it is also of significance as it affects the drainage of iron and slag and the hot metal temperature and composition. The paper analyses the hearth of a blast furnace using a model of the lining wear based on the solution of an inverse heat conduction problem, studying the changes in the lining state throughout the campaign. Different operation states are detected, characterized by smooth and efficient hot metal production and by erratic behavior with large disturbances in the hearth state. During the periods of poor performance, the hearth exhibits a cycling state with stages of excessive skull growth on the unworn refractory, followed by periods of dissolution of the skull and lining erosion. An explanation of the transitions is sought by a stating and solving a force balance for the deadman with the aim to clarify whether it is floating or sitting. A connection between the thermal cycles in the hearth and the hot metal sulfur content is finally demonstrated.

scholarly journals Scientific and technical results of IX-th International congress of blast furnace men “Metallurgy of hot metal. Perspectives of development till the year of 2025”.

2019 ◽  
Vol 75 (1) ◽  
pp. 5-9
Author(s):  
A. A. Tretyak
Keyword(s):  
Blast Furnace ◽  
Information Technologies ◽  
Production Efficiency ◽  
Machine Building ◽  
International Congress ◽  
Metallurgical Coke ◽  
Hot Metal ◽  
Alternative Technologies ◽  
Foreign Companies ◽  
Foreign Countries

From September 25 through September 27, 2018, the IX-th International congress of blast furnace men took place in Nizhny Tagil at the base of JSC “EVRAZ NTMK” named “Metallurgy of hot metal. Perspectives of development till the year of 2025”. It was organized by International Union of blast furnace men, “MetProm” Group and JSC “EVRAZ NTMK”. Heads and specialists of metallurgical, coke-making and chemical and machine-building plants, representatives of designing organizations, R&D institutes from Russia, CIS and foreign countries – all together 180 participants. At the congress, the specialists could receive information on modern developments, to exchange by opinions and experience. More than 60 reports were presented, which will be included in the digest of proceedings of the IX-th International congress of blast furnace men. Reports of foreign companies like “Danieli Corus”, “Paul Wurth”, “Primetals Technologies” and “GEA Russia” attracted a big interest. A particular interest was paid at the congress to estimation of status of coke and sinter production, as well as BF production under the current economic conditions, to determination of main ways of the industry development. Leading specialists discussed the ways of BF existing technologies perfection, methods of pig iron production alternative technologies implementation, perfection of means of control, implementation of information technologies, environmentally clean and resources saving technologies, aimed at increasing of products quality and production efficiency. At the forum, results of innovation projects implementation at the biggest steel-works were considered. During the last day of the congress work, the participants visited the JSC “EVRAZ NTMK” blast furnace No. 7, which has a volume of 2200 m3 and designing productivity – 2.5 mt/year of hot metal.

Optimizing Steel-Making Secondary Metallurgy Slag at ISD DUNAFERR Zrt

2015 ◽  
Vol 812 ◽  
pp. 173-179 ◽  
Author(s):  
Róbert Móger ◽  
Mihály Réger ◽  
Alfred Ender ◽  
Róbert Józsa ◽  
Krisztián Wizner
Keyword(s):  
Cold Rolling ◽  
Production Capacity ◽  
Coke Production ◽  
Hot Metal ◽  
Metal Production ◽  
Secondary Metallurgy ◽  
Steel Making ◽  
History Of ◽  
Metallurgical Combine ◽  
Hot And Cold Rolling

ISD DUNAFERR Co. Ltd., formerly named as Dunai Vasmű (Danube Ironworks), has a history of over half a century. Currently it is the only factory in Hungary that is operated by integrated steel-making technology and has a hot metal production capacity of 1.7 million tons (Figure 1). The metallurgical combine includes coke production, hot metal production, steel-making, hot and cold rolling, profiling and manufacturing of galvanized products too. Steel is produced by 2 BOFs with the capacity of 135 tons each.

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