Optimizing Steel-Making Secondary Metallurgy Slag at ISD DUNAFERR Zrt

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

Metallurgical Research & Technology ◽

10.1051/metal/2020074 ◽

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.

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

Global Journal of Researches in Engineering ◽

10.34257/gjreevol21is2pg1 ◽

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.

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Diagnostics, Optimization and Mathematical Models of Coke-Sinter-Hot Metal Production Process

AISTech2019 Proceedings of the Iron and Steel Technology Conference ◽

10.33313/377/050 ◽

2019 ◽

Author(s):

O. Lebid ◽

Y. Vyshinskya ◽

N. Gordon ◽

V. Chaika ◽

G. Izumskiy ◽

...

Keyword(s):

Mathematical Models ◽

Production Process ◽

Hot Metal ◽

Metal Production

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

Sustainability ◽

10.3390/su13147706 ◽

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.

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Hot and cold rolling of electrical steels �0100?�0300

Metallurgist ◽

10.1007/bf00736756 ◽

1972 ◽

Vol 16 (6) ◽

pp. 421-422

Author(s):

M. G. Anan'evskii ◽

N. G. Bochkov ◽

Ya. A. Burshtein ◽

L. I. Butylkina ◽

S. A. Shirinskaya ◽

...

Keyword(s):

Cold Rolling ◽

Electrical Steels ◽

Hot And Cold Rolling

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CONCENTRATION OF HEAVY METALS IN WATER FLOWS IN THE AREA OF UNALSKY TAILING DUMP AND ARDON RIVER

South of Russia ecology development ◽

10.18470/1992-1098-2018-2-113-122 ◽

2018 ◽

Vol 13 (2) ◽

pp. 113-122 ◽

Cited By ~ 1

Author(s):

Dzerassa N. Chigoeva ◽

Inna Z. Kamanina ◽

Svetlana P. Kaplina

Keyword(s):

Heavy Metals ◽

Production Capacity ◽

Chemical Pollution ◽

Environmental Disaster ◽

Tailing Dump ◽

Maximum Permissible Concentrations ◽

History Of ◽

Lead Zinc ◽

Domestic Use ◽

Cadmium Lead

The long history of development of deposits of lead-zinc ores of the Sadonsky mining region led to the formation of extensive halos of chemical pollution of surface watercourses. Aim. The aim of this study is to monitor surface watercourses in the area of the Unalsky tailing dumps and the Kholst deposit by points of sampling of 1992-2004. Sampling was conducted in the summer of 2016. Methods. The content of heavy metals of 2 and 3 hazard classes (Pb, Cd, Ni, Zn and Cu) was studied by atomic absorption. The contribution of the Unaldon River and Unalsky tailing dump to the pollution of the Ardon River. Results. The highest content of cadmium, lead and zinc, significantly exceeding the maximum permissible concentrations (MPC) in the water bodies of cultural and domestic use is found in the Ardon River down from the Unalsky tailing dump. The flow of heavy metals into the Unaldon River with adit waters compared with the observation period of 1992-2004 decreased noticeably. In conditions of a reduction in the production capacity of mining and processing enterprises, the leaching of heavy metals from mountain dumps and excavations make an insignificant contribution to the pollution of the Ardon River in comparison with the Unalsky tailing dump. Conclusion. The state of the Ardon River down from the discharge from the tailing dump corresponds to the "environmental disaster" category. The condition of the rivers Mayramdon and Unaldon according to the content of heavy metals corresponds to a "relatively satisfactory" type.

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Superplastic Behaviour of AA5083 Aluminium Alloy with Scandium and Zirconium

Materials Science Forum ◽

10.4028/www.scientific.net/msf.706-709.395 ◽

2012 ◽

Vol 706-709 ◽

pp. 395-401 ◽

Cited By ~ 8

Author(s):

A. Smolej ◽

B. Skaza ◽

B. Markoli ◽

Damjan Klobčar ◽

V. Dragojević ◽

...

Keyword(s):

Cold Rolling ◽

Strain Rate ◽

Aluminium Alloy ◽

Wide Temperature Range ◽

Initial Strain Rate ◽

Initial Strain ◽

Strain Rates ◽

Superplastic Behaviour ◽

Hot And Cold Rolling ◽

Superplastic Properties

The aim of the present investigation was to determine and to compare the superplastic behaviour of the AA5083 (Al-Mg-Mn) alloy with Sc and Zr additions. The investigated alloys were processed to form sheets by conventional hot and cold rolling. The superplastic properties were determined with strain rates in the range of 1x10-4to 5x10-2s-1and forming temperatures of 350 to 550°C. The results showed that the alloy with about 0.4% Sc exhibited a high superplastic ductility across a wide temperature range and strain rates up to 1x10-2s-1. The highest elongations to failure of about 2000% were attained at 550°C and at an initial strain rate of 5x10-3s-1. However, the alloy with about 0.15% Zr exhibited elongations up to 600%. The FSP processed Al-4.5Mg alloy with combined addition of about 0.2% Sc and 0.15% Zr exhibited good superplastic properties at higher strain rates (> 1x10-2s-1) with elongations up to 1500%.

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Possibilities Reducing of Energy Consumption by Cast Iron Production in Foundry

Materials Science Forum ◽

10.4028/www.scientific.net/msf.998.36 ◽

2020 ◽

Vol 998 ◽

pp. 36-41

Author(s):

Peter Futaš ◽

Alena Pribulová ◽

Marcela Pokusova

Keyword(s):

Cast Iron ◽

Energy Consumption ◽

Iron Production ◽

Hot Metal ◽

Metal Production ◽

Material Efficiency ◽

Electric Induction ◽

Wide Range ◽

The Cost ◽

Metal Melting

Modern metal melting includes of cast iron production in different types furnaces with specific characteristics. Furnaces usually adopted are cupola and induction furnaces. Casting cast iron is a manufacturing process characterized by its energy-intensive nature (ie, the use of large amounts of energy per unit of product for main activities) and a long tradition. An example of the energy balance in a foundry is the design of procedures to reduce energy consumption. The most important is the consumption of energy in the production of hot metals (52%), therefore reducing the cost of preparing hot metal is especially important by reducing the energy consumption of metal melting. The most important energy cost practices are the consumption of hot metal to produce 1mt of high quality castings (often 1700 kg) and reduce the energy consumption of hot metal production that varies over a wide range (from 500 to 1300 kWh/mt). Although scientific and technological aspects are now well established, new studies seem to be needed to describe "foundry of the future", where energy and material efficiency is of great importance to ensure competitiveness alongside environmental protection. The paper presents specific procedures for reducing both economically important indicators in cupola and electric induction furnaces.

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