Concrete Produced by Steel-Making Slag (Basic Oxygen Furnace) Addition in Portland Cement

At the Egyptian Iron and Steel Company, attention is constantly focused on improving basic steel making practice with the aim of improvement of blowing regime and the addition of forming slag materials system. A number of factors considered important in controlling the properties of steel products and affecting the residual manganese in the basic Oxygen furnace (BOF) have been investigated by changing some industrial parameters, aiming at optimizing the residual manganese in BOF. The studied factors were manganese oxide in the slag, iron oxide in the slag, tapping temperature, Slag basicity, Lance height, blowing time, and carbon content. It was found that residual manganese increased from 0.25 to 0.35 % wt, due to the reduction of both MnO in slag from 22% to 15% and FeO from 21 to18%, also the increase of tapping temperature from 1650 oC to 1670 oC caused an increase the residual manganese from 0.27% to 0.35%, and the slag basicity decrease from 4.25 to 3.8 led to an increase in the residual manganese from 0.25 to 0.37%. Also, the change of the lance height from 1050 mm to 825 mm caused an increase in the residual manganese from 0.27 % to 0.33 %. These results are believed to be reflected on the total energy consumption and ferromanganese additions needed for producing specific grades.

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Reducing environmental impacts: The use of basic oxygen furnace slag in portland cement

Journal of Cleaner Production ◽

10.1016/j.jclepro.2017.10.130 ◽

2018 ◽

Vol 172 ◽

pp. 385-390 ◽

Cited By ~ 18

Author(s):

S.Z. Carvalho ◽

F. Vernilli ◽

B. Almeida ◽

M.D. Oliveira ◽

S.N. Silva

Keyword(s):

Portland Cement ◽

Environmental Impacts ◽

Basic Oxygen Furnace ◽

Basic Oxygen ◽

Basic Oxygen Furnace Slag ◽

Furnace Slag

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A New Spectral Analysis Technique Used in Converter Steelmaking BOF Endpoint Control

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.139-141.689 ◽

2010 ◽

Vol 139-141 ◽

pp. 689-692 ◽

Cited By ~ 1

Author(s):

Ling Fei Xu ◽

Wu Sen Li ◽

Shi Xue Xu ◽

Jia Li ◽

Yong Qing Wang

Keyword(s):

Basic Oxygen Furnace ◽

Basic Oxygen ◽

Steel Making ◽

Analysis Technique ◽

Flame Emission ◽

Proposed Model ◽

Endpoint Control ◽

Spectrum Distribution ◽

And Control ◽

Changing Process

This article introduces an arithmetic approach to establish an optical system aiming to eliminate the shortcomings in the steel making technique. The current basic oxygen furnace technique is flawed because the level of carbon content in the molten iron is estimated by the workers observation through experience. It is hard to compare, measure and control. The proposed model, on the other hand, is much more computable: relevant data is collected from spectrum distribution during the process of basic oxygen furnace. It predicts the end-point of BOF relatively accurate because spectrum is quantifiable, and the changing process of the furnace flame is essentially the changing process of the spectrum. In this model, we can measure the temperature of the molten steel by the Flame emission spectroscopy theory principle. Further more, the result of the experiment conducted based on the model shows that the model meets the requirements of endpoint judgment online.

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Endpoint prediction model for basic oxygen furnace steel-making based on membrane algorithm evolving extreme learning machine

Applied Soft Computing ◽

10.1016/j.asoc.2013.09.012 ◽

2014 ◽

Vol 19 ◽

pp. 430-437 ◽

Cited By ~ 21

Author(s):

Min Han ◽

Chuang Liu

Keyword(s):

Prediction Model ◽

Extreme Learning Machine ◽

Basic Oxygen Furnace ◽

Basic Oxygen ◽

Steel Making ◽

Membrane Algorithm ◽

Endpoint Prediction ◽

Furnace Steel ◽

Learning Machine

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Analysis of Basic Oxygen Furnace’s Temperature by the Flame’s Emission Spectrum

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.55-57.16 ◽

2011 ◽

Vol 55-57 ◽

pp. 16-19

Author(s):

Ling Fei Xu ◽

Wu Sen Li ◽

Shi Xue Xu ◽

Jia Li ◽

Yong Qing Wang

Keyword(s):

Light Intensity ◽

Emission Spectrum ◽

Gaussian Function ◽

Atomic Emission ◽

Basic Oxygen Furnace ◽

Background Spectrum ◽

Basic Oxygen ◽

Atomic Spectrum ◽

Steel Making ◽

Flame Emission

The flame of basic oxygen furnace is the most important evident in the steel making process. This studies dividing the flame’s spectrum into two parts: the background spectrum and the characteristic atomic emission spectrum. Compared the figure of the characteristic atomic emission spectrum measured by spectrometer with the Gaussian function, the conclusion shows that the background spectrum could compensate the loss of the light intensity which due to the stimulated absorption of characteristic atomic. Based on the FES ( flame emission spectrometer) and spectrum in the BOF’s flame, the studies deduce a new relationship between the intensity of characteristic atomic spectrum and the temperature of the flame. The results indicates that the temperature measured by FES is inosculated to the temperature obtained by converter sublance comparatively.

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A simulation model for ergonomic design of industrial processes

SIMULATION ◽

10.1177/003754978704900503 ◽

1987 ◽

Vol 49 (5) ◽

pp. 199-206

Author(s):

Voratas Kachitvichyanukul ◽

James R. Buck ◽

Chee-Seng Ong

Keyword(s):

Current Mode ◽

Basic Oxygen Furnace ◽

Industrial Processes ◽

Simulation Experiments ◽

Basic Oxygen ◽

Steel Making ◽

Mode Of Operation ◽

Equipment Failures ◽

Potential Benefits ◽

New Processing

This study examines the feasibility and potential benefits of using simulation to aid designers of large industrial processes. A demon stration of simulations is provided in the basic oxygen furnace shop and subsequent steel-making operations prior to rolling slabs. We explore three design situations: (1) a new processing technology, (2) the removal of bottlenecks in current operations, and (3) sensitivities of processing to equipment failures. Overall shop productivity and the time workloads of crews and indi vidual process operators are examined. Contrasts are made on these criteria between the current mode of operation and the potential design situations stated above through simulation ex periments. Results of these simulation experiments provide the basis for economic and ergonomic justification as well as indica tions for further improvements in the ergonomic facets of design.

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Operator Workloads and Mill Performance Effects Due to Design Changes

Proceedings of the Human Factors Society Annual Meeting ◽

10.1177/107118137802200104 ◽

1978 ◽

Vol 22 (1) ◽

pp. 16-20

Author(s):

Chee-Seng Ong ◽

James R. Buck

Keyword(s):

Rolling Mill ◽

New Technologies ◽

Basic Oxygen Furnace ◽

Modes Of Operation ◽

Basic Oxygen ◽

Steel Making ◽

Design Changes ◽

Performance Effects ◽

Machine Simulation ◽

Experimental Strategies

One of the more difficult ergonomics problems is determining the operator workloads and the total mill or shop performance resulting from design changes in the operation. Man/machine simulation and experiments with this simulation provide an aiding technique for ergonomic designers. This technique is demonstrated in the case of steel making in the Basic Oxygen Furnace Shop and the Rolling Mill. Modeling with the latest version of SAINT is shown. Experiments are illustrated for different modes of operation, added or deleted equipment, and new technologies in order to find mill and shop performance and the effect of workloads on particular jobs. Experimental strategies and implications are discussed.

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