Semi-Solid State of Blast Furnace Slag Admixtures of AL2O3

2014 ◽  
Vol 59 (1) ◽  
pp. 173-182 ◽  
Author(s):  
P. Migas ◽  
M. Korolczuk-Hejnak
Keyword(s):  
Steel Production ◽  
Slag System ◽  
Chemical Compositions ◽  
Concentric Cylinder ◽  
Iron And Steel ◽  
Temperature Range ◽  
Wide Range ◽  
Solid Phases ◽  
Semi Solid ◽  
Iron And Steel Production

Abstract The nature and properties of liquid solutions - metallurgical slags (used in the pig iron and steel production) affect the quality of the final product and processing time. The main object of the study was slag system: CaO-SiO2-MgO-Al2O3, when the content of Al2O3 was raised to ca. 25% in liquid and semi-liquid state. Measurements were performed using Searle’s method of concentric cylinder systems. Graphite measuring systems were used for testing with two types of bobs: smooth and perforated. Rheological measurements were carried out for five slag systems in the temperature range between 1310-1500°C, shear rate values were changed in the wide range between 1s-1 to 150/180s-1. FactSage application was used to calculate the mass of solid phases precipitating from the slag volume for different chemical compositions at various temperatures. In the temperature range in which the solid phases occurred in the slag the analysed systems show non-Newtonian behaviour.

scholarly journals Extraction of the Rare Element Vanadium from Vanadium-Containing Materials by Chlorination Method: A Critical Review

Metals ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 1301
Author(s):  
Shiyuan Liu ◽  
Weihua Xue ◽  
Lijun Wang
Keyword(s):  
Raw Materials ◽  
Steel Production ◽  
Research Progress ◽  
Vanadium Slag ◽  
Rare Element ◽  
Iron And Steel ◽  
Wide Range ◽  
Spent Catalysts ◽  
Iron And Steel Production ◽  
Titanium Magnetite

Vanadium as a rare element has a wide range of applications in iron and steel production, vanadium flow batteries, catalysts, etc. In 2018, the world’s total vanadium output calculated in the form of metal vanadium was 91,844 t. The raw materials for the production of vanadium products mainly include vanadium-titanium magnetite, vanadium slag, stone coal, petroleum coke, fly ash, and spent catalysts, etc. Chlorinated metallurgy has a wide range of applications in the treatment of ore, slag, solid wastes, etc. Chlorinating agent plays an important role in chlorination metallurgy, which is divided into solid (NaCl, KCl, CaCl2, AlCl3, FeCl2, FeCl3, MgCl2, NH4Cl, NaClO, and NaClO3) and gas (Cl2, HCl, and CCl4). The chlorination of vanadium oxides (V2O3 and V2O5) by different chlorinating agents was investigated from the thermodynamics. Meanwhile, this paper summarizes the research progress of chlorination in the treatment of vanadium-containing materials. This paper has important reference significance for further adopting the chlorination method to treat vanadium-containing raw materials.

scholarly journals The Potentials of Iron and Steel Slags as Supplementary Cementitious Materials in the Nigerian Construction Industry: A Review

2018 ◽  
Vol 2 (2) ◽  
pp. 208-218
Author(s):  
O. R. Ogirigbo ◽  
J. O. Ukpata ◽  
I. Inerhunwa
Keyword(s):  
Portland Cement ◽  
Construction Industry ◽  
Waste Product ◽  
Steel Production ◽  
Cementitious Materials ◽  
Supplementary Cementitious Materials ◽  
Partial Replacement ◽  
Iron And Steel ◽  
Tropical Environments ◽  
Iron And Steel Production

Ground Granulated Blast Furnace Slag (GGBS) is a type of Supplementary Cementitious Material (SCM) that is currently being used extensively in the global construction industry. SCMs are cheaper than Portland cement, help to improve certain properties of concrete and also help to reduce the environmental footprint associated with the production of Portland cement. GGBS is readily available in most parts of the world as a waste product from iron and steel production. However, its use as a SCM in some countries has not been fully maximized. This is primarily because of lack of documented studies on the properties of GGBS that influences its suitability as a SCM, especially in tropical environments. This paper reviewed the use of GGBS as a SCM for the partial replacement of Portland cement, with particular emphasis on its potential use in tropical warm environments such as Nigeria and other similar countries.

scholarly journals An improved imperialist competitive algorithm for hybrid flowshop rescheduling in steelmaking-refining-continuous casting process

2020 ◽  
pp. 002029402096018
Author(s):  
Kunkun Peng ◽  
Xudong Deng ◽  
Chunjiang Zhang ◽  
Quan-Ke Pan ◽  
Liang Ren ◽  
...  
Keyword(s):  
Continuous Casting ◽  
Optimal Schedule ◽  
Steel Production ◽  
Casting Process ◽  
Imperialist Competitive Algorithm ◽  
Initial Population ◽  
Hybrid Flowshop ◽  
Iron And Steel ◽  
Competitive Algorithm ◽  
Iron And Steel Production

Steelmaking-refining-Continuous Casting (SCC) is a key process in iron and steel production. SCC scheduling is to determine an optimal schedule for the SCC process, which is a worldwide and important problem. High-quality SCC scheduling methods will help to allocate production resources effectively and increase the productivity. However, dynamic events (e.g. machine breakdown) may happen in the realistic SCC process, which will make the SCC schedule inexecutable or not optimal. In this case, SCC rescheduling is essential in order to obtain a new optimal schedule suitable for the current production environments. The SCC rescheduling can be modeled as hybrid flowshop rescheduling. In this paper, an Improved Imperialist Competitive Algorithm (IICA) is proposed to address the SCC rescheduling. In the proposed IICA, an empire initialization is first devised for constructing an initial population with diversity and certain quality. Moreover, multiswap-based local search and imperialist competition are designed to improve the exploitation ability of the IICA, while revolution and restart strategy are devised to enhance the exploration ability of the IICA. Comparison experiments with three kinds of ICA have shown the efficiency of the IICA.

scholarly journals Investigation into the Hot Briquetting of Fine‐Grained Residual Materials from Iron and Steel Production

2020 ◽  
Vol 91 (12) ◽  
pp. 2000237
Author(s):  
Laura Lohmeier ◽  
Ralf Wollenberg ◽  
Hans-Werner Schröder
Keyword(s):  
Steel Production ◽  
Iron And Steel ◽  
Fine Grained ◽  
Iron And Steel Production

Environmental and economic-related impact assessment of iron and steel production. A call for shared responsibility in global trade

2020 ◽  
Vol 269 ◽  
pp. 122239 ◽  
Author(s):  
Yanxin Liu ◽  
Huajiao Li ◽  
Shupei Huang ◽  
Haizhong An ◽  
Remo Santagata ◽  
...  
Keyword(s):  
Impact Assessment ◽  
Steel Production ◽  
Shared Responsibility ◽  
Global Trade ◽  
Iron And Steel ◽  
Iron And Steel Production
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