scholarly journals Utilization of iron-aluminum scrap as raw material of cast iron.

2001 ◽  
Vol 13 (3) ◽  
pp. 183-186
Author(s):  
Susumu TAKAMORI ◽  
Yoshiaki OSAWA ◽  
Kohmei HALADA
Keyword(s):  
Cast Iron ◽  
Raw Material ◽  
Aluminum Scrap ◽  
Iron Aluminum

scholarly journals Shaping the Microstructure of High-Aluminum Cast Iron in Terms of the Phenomenon of Spontaneous Decomposition Generated by the Presence of Aluminum Carbide

Materials ◽  
2021 ◽  
Vol 14 (20) ◽  
pp. 5993
Author(s):  
Robert Gilewski ◽  
Dariusz Kopyciński ◽  
Edward Guzik ◽  
Andrzej Szczęsny
Keyword(s):  
Cast Iron ◽  
Aluminum Carbide ◽  
The Self ◽  
Molding Sand ◽  
Aluminum Scrap ◽  
Iron Aluminum ◽  
Iron Castings ◽  
Abrasive Properties ◽  
High Aluminum ◽  
Main Factor

A suitable aluminum additive in cast iron makes it resistant to heat in a variety of environments and increases the abrasion resistance of the cast iron. It should be noted that high-aluminum cast iron has the potential to become an important eco-material. The basic elements from which it is made—iron, aluminum and a small amount of carbon—are inexpensive components. This material can be made from contaminated aluminum scrap, which is increasingly found in metallurgical scrap. The idea is to produce iron castings with the highest possible proportion of aluminum. Such castings are heat-resistant and have good abrasive properties. The only problem to be solved is to prevent the activation of the phenomenon of spontaneous decomposition. This phenomenon is related to the Al4C3 hygroscopic aluminum carbide present in the structure of cast iron. Previous attempts to determine the causes of spontaneous disintegration by various researchers do not describe them comprehensively. In this article, the mechanism of the spontaneous disintegration of high-aluminum cast iron castings is defined. The main factor is the large relative geometric dimensions of Al4C3 carbide. In addition, methods for counteracting the phenomenon of spontaneous decay are developed, which is the main goal of the research. It is found that a reduction in the size of the Al4C3 carbide or its removal lead to the disappearance of the self-disintegration effect of high-aluminum cast iron. For this purpose, an increased cooling rate of the casting is used, as well as the addition of elements (Ti, B and Bi) to cast iron, supported in some cases by heat treatment. The tests are conducted on the cast iron with the addition of 34–36% mass aluminum. The molten metal is superheated to 1540 °C and then the cast iron samples are cast at 1420 °C. A molding sand with bentonite is used to produce casting molds.

Processing of waste slag of non-ferrous metallurgy for the purpose of its complex utilization as a secondary mineral raw material

2021 ◽  
pp. 3-9
Author(s):  
A. S. Kolesnikov ◽  
B. E. Serikbaev ◽  
A. L. Zolkin ◽  
G. S. Kenzhibaeva ◽  
G. I. Isaev ◽  
...  
Keyword(s):  
Raw Material ◽  
Secondary Mineral ◽  
Huge Number ◽  
Silicon Iron ◽  
Iron Aluminum ◽  
Heavy Nonferrous Metals ◽  
Complex Utilization ◽  
Calcium Silicon ◽  
Secondary Raw Material ◽  
The Moment

This article provides an overview of the methods of processing slag from welting is given, different approaches and attempts of scientists from a number of countries aimed at processing such slags are considered. In the course of the review it was found that a huge number of the following methods and methods of processing from waelz slag, there is not a single option that has sufficient complexity of processing, and that at the moment are in the dumps toxins from waelz never found its use as a secondary raw material. The elemental chemical composition of the slag from welting, which is represented by compounds of calcium, silicon, iron, aluminum, carbon and heavy nonferrous metals in the form of zinc and lead, is determined. Thus, it is established that for many years, the slags from waelz that have not found their application and are in the dump at the moment continue to have a polluting effect on the environment. Ill. 1. Ref. 63. 

Anomalous growth of grains in cast iron-aluminum alloys

1963 ◽  
Vol 5 (12) ◽  
pp. 719-720
Author(s):  
V. I. Matorin ◽  
V. Z. Pogosov
Keyword(s):  
Cast Iron ◽  
Aluminum Alloys ◽  
Iron Aluminum ◽  
Iron Aluminum Alloys ◽  
Anomalous Growth

scholarly journals «Out-of-furnace cast iron processing» subsystem in the solution of tasks for the choice of rational technology for producing quality metal products under the applicable conditions of raw material and technological.

2019 ◽  
pp. 106-115
Author(s):  
D.N. Togobitskaia ◽  
A.S. Vergun ◽  
L.S. Molchanov ◽  
V.G Kislyakov ◽  
Y.M. Likhachov ◽  
...  
Keyword(s):  
Decision Making ◽  
Cast Iron ◽  
Information Modeling ◽  
Raw Material ◽  
Injection System ◽  
Pig Iron ◽  
Furnace Treatment ◽  
Metal Products ◽  
End To End ◽  
Quality Metal

The creation of end-to-end technology for the production of competitive metal products in modern conditions puts on the agenda the task of choosing the optimal metal production technology scheme. In solving this problem, a significant role belongs to the development of an information-modeling system for analysis and decision making. An important link in end-to-end technology is the after-furnace treatment of cast iron. As the analysis of various technological solutions for pig iron desulfurization has shown, the process developed at the Institute of Ferrous Metallurgy is currently the most economical, rational and preferred. The process is carried out by blowing through the immersed tuyeres of dispersed granular magnesium without additives. A special dosing and injection system is used. The developed process has undergone numerous industrial testing at domestic and foreign factories. To optimize the process of end-to-end technology and its information-mathematical support, modular mathematical models have been developed. An integrated database has been created that summarizes information on the parameters of cast iron desulfurization technology with granular magnesium. The expert system «Out-of-furnace cast iron processing» is described and presented, which allows to obtain high-quality metal products. The adequacy of the developed model for predicting the specific consumption of magnesium in the after-furnace treatment of cast iron was studied. The completed developments created the prerequisites for building the architecture of the Expert Decision Making System. The replenishment of the database with information on current and other technologies for pig iron desulfurization will make it possible to refine the existing and obtain descriptive models for various reagents, which will serve as the basis for the algorithmic support of the analytical unit of the expert system.Key words: desulfurization, hot metal, magnesium, information system, model.

scholarly journals Evaluación de cenizas de fondo de carbón para la fabricación de ladrillos de arcilla: estudio preliminar

2021 ◽  
Vol 20 (4) ◽  
Author(s):  
Janneth Torres-Agredo ◽  
Luisa Fernanda Mosquera-Idrobo ◽  
Patricia Paz-Villegas ◽  
Miguel Fernando Díaz-Huertas
Keyword(s):  
Amorphous Material ◽  
Bottom Ash ◽  
Daphnia Pulex ◽  
Raw Material ◽  
X Ray ◽  
Social Growth ◽  
Clay Bricks ◽  
Iron Aluminum ◽  
Burning Coal ◽  
Xrd Techniques

Currently, industrial, economic, and social growth has produced large amounts of solid waste, which harms the environment and human health. Coal bottom ash (CBA) is a waste produced by burning coal. A preliminary study on CBA, to be used as raw material for the clay bricks manufacture, is presented. CBA was characterized through the Laser Granulometry, X-ray Fluorescence (XRF), X-ray diffraction (XRD) techniques; besides, the real and apparent density and the content of organic matter. Furthermore, the environmental tests Toxicity Characteristic Leaching Procedure (TCLP) and Daphnia Pulex acute toxicity test, were applied. It was found that the CBA is an amorphous material, and is composed of oxides of silica, iron, aluminum, and others, while the environmental tests satisfactorily met the applicable standards. According to the results, it is concluded that the CBA has a great potential to be used in the manufacture of bricks.

scholarly journals Production of Ferroboron from Wastes by SHS-metallurgy and influence of Ligatures on the Structure/Properties of Cast Iron

2021 ◽  
Vol 906 (1) ◽  
pp. 012008
Author(s):  
Garegin Zakharov ◽  
Zurab Aslamazashvili ◽  
Mikheil Chikhradze ◽  
Davit Kvaskhvadze ◽  
Nugzar Khidasheli ◽  
...  
Keyword(s):  
Phase Composition ◽  
Cast Iron ◽  
Practical Interest ◽  
Industrial Process ◽  
Industrial Wastes ◽  
Raw Material ◽  
Shs Metallurgy ◽  
High Temperature Synthesis ◽  
Wide Range ◽  
Hematite Fe2o3

Abstract Waste, generated during the industrial process negatively affects the environment, but at the same time it is a valuable raw material and can be used to produce new marketable products. The study of the effectiveness of Self-propagating High temperature Synthesis (SHS) methods, which are characterized by the simplicity of the necessary equipment, the purity of the final product and the high processing speed, is under the wide scientific and practical interest to solve the set problem. The work describes technological aspects of production of ferro boron by the method of SHS - metallurgy from iron-containing wastes of rolled production for alloying of cast iron and results of effect of alloying element on degree of boron assimilation with liquid cast iron. Features of Fe-B system combustion have been investigated and the main parameters to control the phase composition of synthesis products have been experimentally established. Effect of overloads on patterns of cast ligatures formation and mechanisms of structure formation of SHS products was studied. It has been shown that an increase in the content of hematite Fe2O3 in iron-containing waste leads to an increase in the content of phase FeB and accordingly, the amount of boron in the ligature. Boron content in ligature is within 3-14%, and phase composition of obtained ligatures consists of Fe2B and FeB phases. Depending on the initial composition of the wastes, the yield of the end product reaches 91 - 94%, and the extraction of boron is 70 - 88%. Combustion processes of high exothermic mixtures allow obtaining a wide range of boron-containing ligatures from industrial wastes. In view of the relatively low melting point of the obtained SHS-ligature, the positive dynamics of boron absorption by liquid iron is established. According to the obtained data, the degree of absorption of the ligature by alloying gray cast iron at 1450 ° C is 80 - 85%. When combined with the treatment of liquid cast iron with magnesium, followed by alloying with the developed ligature, boron losses are reduced by 5-7%. At that uniform distribution of boron micro-additives in volume of treated liquid metal is provided.

scholarly journals Production of cast iron during the melting of mineral raw materials in coke cupolas

2021 ◽  
pp. 43-48
Author(s):  
S. L. Rovin ◽  
L. E. Rovin ◽  
V. A. Jaranov
Keyword(s):  
Cast Iron ◽  
Liquid Metal ◽  
Raw Materials ◽  
Mineral Wool ◽  
Raw Material ◽  
Mineral Raw Materials ◽  
Cast Alloys ◽  
A Charge ◽  
Technical Solutions

In the production of mineral raw materials in cupolas, as a by-product and harmful product, a significant amount of cast iron (up to 3 % of the raw material) is formed and, as a rule, thrown into the dumps. The article presents technical solutions that ensure the separation of mineral melt and cast iron. In addition, the article describes the results of optimizing the design of ladders used for draining liquid metal from the mineral wool cupola and transporting it. The resulting cast iron ingots can then be used as a charge in the smelting of branded cast alloys.

scholarly journals Reuse of the Steel Mill Scale for Sustainable Industrial Applications

Proceedings ◽  
2020 ◽  
Vol 63 (1) ◽  
pp. 14
Author(s):  
Dana-Adriana Iluțiu-Varvara ◽  
Marius Tintelecan ◽  
Claudiu Aciu ◽  
Ioana-Monica Sas-Boca
Keyword(s):  
Chemical Elements ◽  
Industrial Applications ◽  
Raw Material ◽  
Future Research ◽  
Steel Mill ◽  
High Iron Content ◽  
Mill Scale ◽  
Iron Aluminum ◽  
Silica Alumina ◽  
Hematite Fe2o3

The purpose of our paper is to assess the reuse potential of the steel mill scale for sustainable industrial applications. We have presented the experimental procedures for chemical and mineralogical characterizations. According to the results of the elementary chemical analysis, the steel mill scale contains the following predominant chemical elements: iron, aluminum, silicon, and magnesium. Due to its high iron content, the steel mill scale can be reused as a source of raw material in the sustainable steelmaking industry. The mineralogical phases identified in the steel mill scale are: wüstite (FeO), hematite (Fe2O3), magnetite (Fe3O4), silica (quartz) (SiO2), magnesioferitte (MgFe2O4), and aluminum oxide (corundum) (Al2O3). Silica, alumina, and hematite are the main compounds of the cement and contribute to the formation of the: dicalcium silicate (2CaO·SiO2), tricalcium silicate (3CaO·SiO2), tricalcium aluminate (3CaO·Al2O3), and tetra—calcium aluminoferrite (4CaO·Al2O3·Fe2O3). The results of the paper are promising and encourage the future research for establishing the optimal percentage for the reuse of the steel mill scale in the composition of concrete.

The Study of the Magnetic Properties of Red Mud from Alumina Production after Alkaline Treatment

2021 ◽  
Vol 316 ◽  
pp. 673-677
Author(s):  
Irina V. Loginova ◽  
Aleksei V. Kyrchikov
Keyword(s):  
Magnetic Properties ◽  
Cast Iron ◽  
Red Mud ◽  
Iron Content ◽  
Alkaline Treatment ◽  
Raw Material ◽  
Magnetic Fraction ◽  
Alumina Production ◽  
Aluminum Compounds ◽  
Vanadium Titanium

In Russia, the main feedstock for producing aluminum is bauxite. During the processing of 1 ton of bauxite into alumina (Al2O3), up to 0.5–0.6 ton of techno-genic waste is formed, that is red mud. It is not currently disposed of and accumulated in mud tailing dumps. It contains valuable components: Al – 8 %; Fe – 25 %; Ti – 2.4 % and it can be considered as a potential raw material for ferrous metallurgy and as a source of vanadium, titanium, and rare-earth elements (REE) Sc, Y, La. The paper shows the possibility of obtaining red mud with an increased iron content of up to 36 %, with an additional extraction of aluminum. Red mud from the Ural Aluminum Plant (Russia) is considered. It is proposed to direct this mud to the production of pellets for the production of cast iron. To extract aluminum from red mud, it is proposed to process the mud in a highly alkaline medium by sintering in the temperature range 300–600 °C. The resulting sinter is leached with water or a slightly alkaline solution with the conversion of aluminum compounds into solution. The red mud, obtained this way, exhibits magnetic properties. A magnetic separation was carried out, and the yield of the magnetic fraction is 79.87 %. The iron content increases by 25 % and amounts to 51.88 % of Fe2O3.

In Situ Observation of Semisolid Fe-2.5C-1.5Si Gray Cast Iron

2016 ◽  
Vol 256 ◽  
pp. 63-68
Author(s):  
Davi Munhoz Benati ◽  
Kazuhiro Ito ◽  
Kazuyuki Kohama ◽  
Hajime Yamamoto ◽  
Eugênio José Zoqui
Keyword(s):  
Cast Iron ◽  
Liquid Phase ◽  
Laser Scanning ◽  
Gray Cast Iron ◽  
Solid Phase ◽  
Laser Scanning Confocal Microscopy ◽  
Raw Material ◽  
Gray Cast ◽  
Heating Process

Fe-2.5C-1.5Si gray cast iron evaluated in previous works exhibited promising potential as semisolid raw material presenting low levels of maximum stress and viscosity, similar to Al-Si alloys. This work is intended to investigate phase transformations and liquid phase formation for the Fe-2.5C-1.5Si gray cast iron in order to understand the performance of the alloy during the semisolid processing. Thus in situ heating experiments via high temperature laser scanning confocal microscopy were performed to analyze the solid-to-liquid transition. At room temperature alloy presented a matrix of pearlite and ferrite with type D flake graphite. During the heating process the main transformations observed were graphite precipitation on the austenite grain boundaries, graphite precipitates and flakes graphite growing and coarsening with the increasing of temperature and the beginning of melt around 1140°C. Coarsened flakes at high temperatures resulted in a liquid continuous network after melting, thereby the liquid phase was formed surrounding and wetting homogeneously the solid phase. This favors the detachment of grains from each other and leads to the intended solid globules immersed in liquid.

Sign in / Sign up

Export Citation Format

Share Document