scholarly journals Quality of Coke used in Blast Furnace Process – Analysis of Selected Parameters

2019 ◽  
Vol 1 (1) ◽  
pp. 602-609
Author(s):  
Edyta Kardas ◽  
Pavlína Pustějovská
Keyword(s):  
Blast Furnace ◽  
Alternative Fuels ◽  
Raw Materials ◽  
Process Analysis ◽  
Coal Dust ◽  
Quality Parameters ◽  
Pig Iron ◽  
Blast Furnace Process ◽  
Furnace Process

Abstract The basic economic goal of pig iron process is to produce a finished product at the highest possible quality and at the lowest possible cost. The quality of pig iron depends on the quality of raw materials used in the process, quality of fuels and process parameters. The cost of fuel is one of the basic component of cost of pig iron production. Therefore, consumption of fuels should be minimized while maintaining its high quality. The main technological fuel of this process is blast furnace coke. Very often, cheaper alternative kinds of fuels are used in the form of finer sorts of coke or alternative fuels (e.g. coal dust). However, they can be used only in a limited amount. The aim of the paper is the assessment of the selected quality parameters of stabilized coke used in the blast furnace process and the comparison of their values with requirements.

Energy Analysis of CO2 Removal in a CHP Plant Fired With Corex Export Gas

Volume 1 ◽  
2004 ◽  
Author(s):  
Krzysztof Lampert ◽  
Andrzej Ziebik ◽  
Giampaolo Manfrida
Keyword(s):  
Blast Furnace ◽  
Energy Analysis ◽  
Co2 Removal ◽  
Pig Iron ◽  
Blast Furnace Process ◽  
Fuel Gas ◽  
Furnace Process ◽  
Environmental Friendly ◽  
Physical Absorption

The Corex process is a more environmental-friendly method of pig iron production than the blast-furnace process. Additionally, this technology is accompanied by production of a fuel gas with a LHV twice as high as blast-furnace gas. Corex gas may be a useful fuel in a metallurgical CHP plant including a combined gas-and-steam cycle. The utilization of Corex gas contributes also to a decrease of CO2 emissions, which is an advantage from the viewpoint of the greenhouse effect. Moreover removing CO2 from the gas before its consumption can allow a further reduction of greenhouse issues. The paper considers the application of two methods of CO2 removal, namely “physical absorption (Selexol solvent)” and “cryogenic gas separation”. The effect of CO2 removal on the operation of CHP plants has been investigated. The removal of CO2 affects first of all the quality of fuel gas in comparison with the raw Corex gas. However, the CO2-removal installation is characterized by a considerable power consumption. Thus the net power and the efficiency of the CHP plant are reduced. Comparing the two considered methods of CO2 removal the cryogenic separation method requires more input energy, but in some cases liquefied CO2 may be an attractive agent. The paper contains the results of a quantitative analysis of the application of these two CO2-removal methods in the Corex technology and their effect on the exploitation characteristics of CHP plants fired with Corex gas.

A Technical and Economic Analysis of Pig Iron Production

2010 ◽  
Vol 638-642 ◽  
pp. 3291-3296
Author(s):  
Edyta Kardas
Keyword(s):  
Blast Furnace ◽  
Economic Analysis ◽  
Raw Materials ◽  
Production Costs ◽  
Iron Production ◽  
Pig Iron ◽  
Blast Furnace Process ◽  
Furnace Process ◽  
Technical And Economic Analysis ◽  
Operation Parameters

Blast furnace work involves the flow of enormous volumes of raw materials. Modifications of the blast furmace operation parameters can bring about savings connected with materials consumption and also a reduction of production costs. The continuous technical-economic analysis of this process enables changes in the process to be observed by means of simple indexes. In this article, a technical-economic analysis of the blast furnace process is presented. It is based on the results of a Polish blast furnace with an overall capacity of 3200m3.

Reduction of Composite Pellet Containing Indonesia Lateritic Iron Ore as Raw Material for Producing TWDI

2013 ◽  
Vol 281 ◽  
pp. 490-495 ◽  
Author(s):  
Adji Kawigraha ◽  
Johny Wahyuadi Soedarsono ◽  
Sri Harjanto ◽  
Pramusanto
Keyword(s):  
Blast Furnace ◽  
Iron Ore ◽  
Raw Material ◽  
Pig Iron ◽  
Blast Furnace Process ◽  
Composite Pellet ◽  
Furnace Process ◽  
Iron Phase ◽  
Reductive Atmosphere ◽  
Reduced Pellets

Blast furnace process is still an important process for producing pig iron. The process needs high grade iron ore and coke. The two materials can not be found easily. In addition blast furnace process needs cooking and sintering plant that produces polluted gases. Utilization of composite pellet for pig iron production can simplify process. The pellet is made of iron ore and coal. In addition the pellet can be made from other iron source and coal. This paper discusses the evolution of phase during reduction of composite pellet containing lateritic iron ore. Fresh iron ore and coal were ground to 140 mesh separately. They were mixed and pelletized. The quantity of coal added was varied from 0 %, 20 % and 29 % of pellet weight. Pellets were heated with 10 °C/minute to 1100 °C, 1200 °C, 1300 °C and 1350 °C in a tube furnace and temperature was held during 10 minutes. Heated pellets were analyzed with XRD equipment. XRD of reduced pellets showed that iron phase change with coal and temperature. Lack of coal during heating results the re-oxidation of iron phases. This process is due to replacement of reductive atmosphere by oxidative atmosphere.

scholarly journals The Comparison of Ore Raw Materials for Blast Furnace Process Based on the Quantification of Selected Key Criteria

2019 ◽  
Author(s):  
Petr BESTA ◽  
Kamila JANOVSKÁ ◽  
Šárka VILAMOVÁ ◽  
Tomáš MALČIC ◽  
Adam DRASTICH ◽  
...  
Keyword(s):  
Blast Furnace ◽  
Raw Materials ◽  
Blast Furnace Process ◽  
Furnace Process

scholarly journals The Mini Blast Furnace Process: An Efficient Reactor for Green Pig Iron Production Using Charcoal and Hydrogen-Rich Gas: A Study of Cases

Metals ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 1501
Author(s):  
Jose Adilson de Castro ◽  
Giulio Antunes de Medeiros ◽  
Elizabeth Mendes de Oliveira ◽  
Marcos Flavio de Campos ◽  
Hiroshi Nogami
Keyword(s):  
Blast Furnace ◽  
Process Efficiency ◽  
Rate Equations ◽  
Base Case ◽  
Pig Iron ◽  
Blast Furnace Process ◽  
Reference Case ◽  
Fuel Gas ◽  
Furnace Process ◽  
Operational Conditions

The mini blast furnace process is an efficient route to produce pig iron based on the burden with granulated charcoal. New, improved technologies have recently been introduced in the mini blast furnace process, such as pulverized charcoal and gas injections, new burden materials, and peripheral devices that improve the overall process efficiency. In this paper, we revise the new injection possibilities and discuss new aspects for further developments. The analysis is carried out with a comprehensive multiphase multicomponent mathematical model using mass, momentum, and energy conservation principles coupled with the rate equations for chemical reactions, multiphase momentum, and heat exchanges. We analyze new technological possibilities for the enhancement of this process as follows: (i) a base case of pulverized charcoal injection with industrial data comparison; (ii) a set of scenarios with raceway injections, combining pulverized charcoal with hydrogen-rich fuel gas, replacing granular charcoal in the burden; (iii) a set of scenarios with hydrogen-rich gas injection at the shaft level, replacing reducing gas in the granular zone of the reactor; and the possible combination of both methodologies. The simulated scenarios showed that a considerable decrease in granular charcoal consumption in the burden materials could be replaced by combining a pulverized charcoal injection of 150 kg/tHM and increasing rich gas injections and oxygen enrichment values, decreasing the specific blast injection and granular charcoal. The productivity of the mini blast furnace process was increased for all scenarios compared with the reference case. We review the aspects of these operational conditions and present an outlook for improvements on the process efficiency.

The Effect of Coke Quality on Blast Furnace Working

2012 ◽  
Vol 706-709 ◽  
pp. 2164-2169
Author(s):  
Anna Konstanciak
Keyword(s):  
Mechanical Properties ◽  
Blast Furnace ◽  
Coke Quality ◽  
High Variability ◽  
Blast Furnace Process ◽  
Furnace Process ◽  
University Of Technology ◽  
Chamber Model

The analysis of coke quality and the effect of coke quality on blast furnace process was presented in this paper. The mechanical properties of cokes was determined by the MICUM method, the same coke samples were hot tested in the blast-furnace pre-tuyère chamber model at the Department of the Extraction and Recycling of Metals of the Czestochowa University of Technology to determine their thermo-abrasiveness ξ. Moreover, the permeability of the column of materials in the blast furnace during the use of those cokes was determined. The permeability of the materials column characterizes the “quality” of the materials, including the coke. Separating the coke features in this characteristics is possible with the remaining charge and technological conditions being stabilized. However, the high variability of charge conditions in the blast-furnace under examination distorts the existing permeabilities. Nevertheless, the dependence of the permeability on thermo-abrasiveness was “physically” correct, i.e. it decreased with increasing thermo-abrasiveness ξ, despite the small value of the coefficient of significance of this relationship.

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