scholarly journals Use of Regeneration Products of Moulding Mixtures For Construction and Refractory Materials Manufacturing

2017 ◽  
Vol 2 (2) ◽  
pp. 83
Author(s):  
Kapustin F.L. ◽  
Furman E.L. ◽  
Ponomarenko A.A. ◽  
Kapustin A.F.

<p>Composition and regeneration properties of the molding sand mixtures worked out of casting production ‒ quartz sand and dust fraction. The results of the laboratory investigations as to their use in both building and refractory materials composition are presented. The industrial tests have shown the high efficiency of silica rich regenerated products in dinas products manufacture.</p>

2012 ◽  
Vol 114-117 ◽  
pp. 30-34 ◽  
Author(s):  
Zhizhen Zhang ◽  
Jingsheng Li ◽  
Xiaoxia Li ◽  
Houquan Huang ◽  
Lifen Zhou ◽  
...  

2016 ◽  
Vol 61 (4) ◽  
pp. 1805-1812
Author(s):  
A. Strkalj ◽  
Z. Glavas ◽  
L. Slokar

Abstract This paper deals with the waste foundry molding sand which originally comes from the casting production. Adsorption of Cu (II) ions on the waste foundry molding sand was studied. Experimental data were processed using adsorption isotherms. Obtained results show that the experimental data are best described by the Langmuir isotherm. The following adsorption capacities are obtained: 7.153 mg/g to 293 K, 8.403 mg/g at 333 K and 9.208 mg/g at 343 K. The kinetics and thermodynamics of the process were analysed. The obtained results indicate that the adsorption process takes place according to the pseudo second order kinetic model with the following constants: 0.438 g/mg min at 293 K, 0.550 g/mg min at 333 K and 1.872 g/mg min at 343 K. The following values of ΔG° were obtained: − 95.49 J/mol at 293 K, − 736.99 J/mol at 333 K and − 1183.46 J/mol at 343 K. The value of ΔH° is − 4.16 kJ/mol and the value of ΔS° is 15.17 J/molK. These results were confirmed by microscopic examinations. The results indicate that the adsorption process of Cu (II) ions on waste foundry molding sand is possible. Results of microscopic examinations show the homogeneity of the surface, which is proof of the chemisorption. Cu (II) ions on the surface of the waste foundry molding sand were detected after adsorption by EDS analysis, which proves the existence of the adsorption process.


2008 ◽  
Vol 2 (4) ◽  
pp. 227-228
Author(s):  
Kazuhiko Terashima ◽  
Shunji Moromugi

Kazuhiko Terashima, p. 227 Simple, low-cost casting technology is essential to transforming materials into products that are used for important components in the automobile, precision machining, and fabrication fields. The casting industry is currently becoming involved in global manufacturing competition as areas such as press, forging, spray-coating, and machining becoming increasingly active. Against this background, the casting society is striving to achieve high quality, lightening, high production, and low cost. This special issue was planned in discussions with Dr. S. Moromugi and provides insight on high-technology furnace, molding, sand process, pouring, inspection of iron casting using green sand, together with innovative casting methods such as sand press casting, die casting, full molding, and IT technology for managing of cast products. This special issue’s advanced papers were selected as representative of individual fields that should prove interesting, stimulating, and of great practical use to both general readers and specialists alike. We thank the authors for their kind attention to the many interesting papers contributed to this issue. Shunji Moromugi, p. 228 Casting, one of the most basic and oldest manufacturing processes, dates back over five centuries. Casting technologies developed over a long period and involve a wide varieties of methods and techniques for improving product quality. Product efficiency has been dramatically improved thanks to advances in casting automation. Even so, many hands are still needed in some casting production because experienced, skilled, and knowledgeable crafts persons are the key to success in yet unautomated casting production processes. Many fields still await the development of automation in casting. With progress in globalization, economy concerns with automation in basic metal processing are increasing rapidly, especially in newly industrialized nations. This special issue presents many valuable papers and development reports by researchers and engineers active on the front lines of casting automation development. This special issue will serve as a useful reference providing much practical information and many new insights into automation technology for casting engineers worldwide. We thank guest editor Professor Kazuhiko Terashima for his invaluable assistance throughout the editing process. This special issue would not have been possible without him. We also thank the authors and editors for their contributions to this issue.


1991 ◽  
Vol 24 (7) ◽  
pp. 261-268 ◽  
Author(s):  
Y. P. Sedlukho

The problems of applying new method of coalescence of emulsified oil products on the surface of hydrophobic filtering materials during purification of oil-containing waste water are discussed. The results of some theoretical and experimental research are listed. During the research granulated polymers (polyethylene, polypropylene) and hydrophobic quartz sand were used as filtering materials. The research reveals the fundamental processes which are occurring. The main principles of technological computation as well as those of designing installations and separate elements of installations are worked out. The paper shows that it is possible to achieve rather a high efficiency of separating water/oil emulsions if filtering materials and technological parameters are selected properly. The paper is based on the results of recent research carried out under the guidance of the author at the Novopolotsk Polytechnic Institute.


2020 ◽  
pp. 66-69
Author(s):  
E. N. Kuzin ◽  
N. E. Kruchinina

Setting up a circulation water supply system is a prerequisite for a modern competitive steel making company. The most frequent problem faced by steel makers includes the challenge of removing suspended solids from large volumes of wastewater. Residual concentration of suspended solids (1-10 mg/l) is the main criterion of treatment efficiency. The most difficult task is to remove particles smaller than 1-2 microns, which stay suspended for a long time. One of the biggest sources of wastewater includes the process of removing residual molding sand from machine parts by water jet surface cleaning. Apart from high concentrations of suspended solids, process wastewater have high concentrations of dissolved organic compounds and require prior treatment before it can go to municipal wastewater treatment plants. Titanium-containing coagulants are being used more and more commonly in water treatment processes due to their high efficiency and the lack of most of the drawbacks inherent in conventional coagulants. This paper compares the conventional coagulants (i.e. aluminum and iron compounds) and coagulants containing titanium salts. In addition, complex titanium-containing coagulants were tested in the actual process of removing residual molding sand from machine parts by water jet surface cleaning. The findings show that titanium tetrachloride outperforms the conventionally used aluminum sulphate and iron chloride, while the effective dose of titanium tetrachloride is on average 2.5 to 3.0 times smaller. The obtained experimental data characterize the effect of added titanium compounds on the water treatment efficiency when conventional reagents are used. It was found that the addition 7.5 wt% of titanium tetrachloride to the conventional aluminum sulphate increases the treatment performance of the latter by 30%. The high efficiency of titanium-containing reagents is due to specific hydrolysis effects, as well as nucleation and flocculation at the surface of hydrolysis products. The rate of sedimentation and filtration of sludges resultant from water treatment with titanium-containing coagulants significantly exceeded that reached when using conventional reagents. The use of titanium-containing reagents will enable to transfer to smaller settlers and filters, reduce the consumption of reagents and reach an enhanced treatment performance. The treated water can be reused or discharged into municipal sewage treatment plants. This research study was carried out as part of the programme supporting research projects carried out by young staff of D. Mendeleev University of Chemical Technology of Russia (Application З-2020-013)


2021 ◽  
Vol 15 (2) ◽  
pp. 247-253
Author(s):  
Orest Vakhula ◽  
◽  
Myron Pona ◽  
Ivan Solokha ◽  
Oksana Koziy ◽  
...  

The issue of cordierite-mullite refractories protection from the influence of aggressive factors is considered. The interaction between the components of protective coatings has been studied. It has been investigated that in the systems based on poly(methylphenylsiloxane) filled with magnesium oxide, alumina and quartz sand, the synthesis of cordierite (2MgO•2Al2O3•5SiO2), mullite (3Al2O3•2SiO2) or magnesium aluminate spinel (MgO•Al2O3) is possible. The basic composition of the protective coating, which can be recommended for the protection of cordierite-mullite refractory, is proposed.


2015 ◽  
Vol 788 ◽  
pp. 22-27
Author(s):  
Igor G. Sapchenko ◽  
Sergey G. Zhilin ◽  
Oleg N. Komarov ◽  
Evgeniy E. Abashkin ◽  
Dmitrii A. Potianikhin

Conventional recycling methods of industrial waste such as ferrous and non-ferrous chips and broken graphite are ineffective. In this paper we investigate exothermic remelting of industrial waste. Parameters of the most effective recycling conditions which result in a maximal yield of reduced metal and high efficiency of steel casting have been determined. The influence of the aluminothermic mixture density, a fraction and a granulometric composition of the mixture initial components on the metallic yield is shown in the paper. The possibilities of reducing the material content in the thermite mixture are also discussed. The most productive process of steel casting with the use of industrial waste which makes it possible to reduce the overall dimensions of casting molds and the bulk of molding materials is proposed.


2002 ◽  
Vol 36 (11) ◽  
pp. 2403-2413 ◽  
Author(s):  
Joseph N. Ryan ◽  
Ronald W. Harvey ◽  
David Metge ◽  
Menachem Elimelech ◽  
Theresa Navigato ◽  
...  

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