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    Tytuł:
    Used Furan Sand Reclamation in REGMAS Vibratory Unit
    Autorzy:
    Dańko, J.
    Dańko, R.
    Skrzyński, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/381674.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    used sand
    mechanical reclamation
    environmental protection
    masa zużyta
    regeneracja mechaniczna
    ochrona środowiska
    Opis:
    The paper, especially dealt with problems of reclamation of used furan sand, carried out in new, vibratory sand reclamation unit REGMAS developed by researches from AGH-University of Science and Technology, Faculty of Foundry Engineering in Cracow (Poland). Functional characteristics of reclamation unit as well as the results of reclamation of used sand with furfuryl resin are discussed in the paper. The quality of reclaim was tested by means of the LOI and pH value, dust content in the reclaim and at least by the the quality of the castings produced in moulds prepared with the use of reclaimed matrix.
    Źródło:
    Archives of Foundry Engineering; 2015, 15, 3; 25-28
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Primary Used Sand Reclamation Process Efficiency
    Autorzy:
    Skrzyński, M.
    Dańko, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/380765.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    spent foundry sands
    mechanical reclamation
    environmental protection
    zużyta masa formierska
    rekultywacja
    ochrona środowiska
    Opis:
    The results of the efficiency of the primary reclamation process as well as the influence of the used sand temperature and other process parameters on it are presented in this paper. A separate stand realized on a reduced scale was built, which is an analogous process of the primary reclamation treatment of spent foundry sands. The used sands were introduced to the crushing process in an agglomerated form in the way typically used in industrial devices. The primary reclamation process was realized on a set of four horizontal sieves with decreasing mesh clearances while maintaining their geometrical dimensions applied in the Regmas industrial device. The model system consists of a vibratory drive mounted on the table, allowing us to control the supply frequency of the vibratory motors within a range of 40-60 Hz as well as the computer system for measuring the vibration parameters and drive power. The used sand on the quartz matrix with the KALTHARZ U404 resin and 100T3 hardener was used in our investigations. The used sand was prepared under the following conditions: cubic-shaped elements made of the applied furan sand was compacted by vibrations then hardened and subjected to heating under controlled conditions (as a “simulation” of the overheating process taking place in the mold after pouring). Time functions of the crushing and sieving process in dependence of the overheating degree of the reference sand samples (100°, 200°, and 300°C) were investigated at various table vibration frequencies and feed loads of the sieve set. The relative index of the crushing ability was determined.
    Źródło:
    Archives of Foundry Engineering; 2019, 1; 29-34
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Utilisation of Products of the Thermal Reclamation of Post Reclamation Dusts in the Production Technology of Ceramic Building Materials
    Autorzy:
    Holtzer, M.
    Dańko, R.
    Dańko, J.
    Pytel, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/383368.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    moulding sand
    mechanical reclamation
    post-reclamation dust
    environmental protection
    masa formierska
    regeneracja mechaniczna
    pył poregeneracyjny
    ochrona środowiska
    Opis:
    The problem related to the management of post reclamation dusts generated in the reclamation process of waste moulding sands with organic binders is presented in the hereby paper. Waste materials generated in this process are products hazardous for the environment and should be utilised. The prototype stand for the utilisation of this dangerous material in its co-burning with coal was developed and patented in AGH in Krakow. The stand was installed in one of the domestic casting houses. As the utilisation result the transformed waste product is obtained and its management in the production of ceramic materials constitutes the subject of the presented publication.
    Źródło:
    Archives of Foundry Engineering; 2015, 15, 4; 33-36
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wykorzystanie regeneratu z technologii cold-box do wykonywania mas rdzeniowych
    Utilisation of the Reclaim from the Cold-Box Technology in the Core Sands Production
    Autorzy:
    Łucarz, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/381438.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    regeneracja mechaniczna
    regeneracja termiczna
    technologia cold-box
    straty prażenia
    mechanical reclamation
    thermal reclamation
    cold-box technology
    loss on ignition
    Opis:
    W publikacji przedstawiono wyniki badań wpływu różnych sposobów regeneracji zużytych mas rdzeniowych na możliwość wykorzystania otrzymanego regeneratu do sporządzania rdzeni w technologii cold-box. Regenerację wykonano w dwóch urządzeniach: regeneratorze mechanicznym REGMAS i doświadczalnym regeneratorze termicznym. W wyniku zrealizowanych badań określono obszar działań, które można podjąć w celu wykorzystania regeneratu do produkcji rdzeni w technologii cold-box. Na bazie pozyskanego regeneratu po obróbce mechanicznej i dodatkowej obróbce termicznej wykonywano rdzenie do badania wytrzymałości na zginanie. Oceniano także wpływ dodatku świeżego piasku do regeneratu, w różnych proporcjach, na jakość otrzymywanych rdzeni pod względem wytrzymałości. Stwierdzono, na podstawie strat prażenia oraz odczynu pH, dużo większą skuteczność regeneracji kombinowanej (mechaniczno-termicznej) w stosunku do zastosowanej tylko regeneracji mechanicznej na oczyszczenie osnowy ziarnowej ze spoiwa. Wykazano także korzystny wpływ dodatku świeżego piasku do regeneratu na parametry wytrzymałościowe masy rdzeniowej wykonanej w technologii cold-box.
    The investigation results of influences of various reclamation methods of spent moulding sands on the possibility of applying the obtained reclaimed material for preparation of cores in the cold-box technology, are presented in the hereby paper. Reclamations were carried out in two devices: the mechanical reclaimer REGMAS and experimental thermal reclaimer. As the result of the performed investigations the range of operations, which can be undertaken in order to utilise the reclaimed material for cores production in the cold-box technology, was determined. On the bases of the obtained reclaim, after its mechanical treatment and an additional heat treatment, cores for bending strength tests were made. The influence of fresh sands additions to the reclaim - in various proportions - on the strength quality of the obtained cores, was also estimated. It was found, on the bases of ignition losses and pH values, that the effectiveness of the combined reclamation methods (mechanical- thermal) was much higher than the mechanical cleaning of matrix grains from binding materials. A beneficial influence of fresh sand additions on the strength parameters of the core sands made in the cold-box technology was also shown.
    Źródło:
    Archives of Foundry Engineering; 2013, 13, 3 spec.; 107-112
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Application of the Triboelectric Method for the Ongoing Assessment of the Quality of Reclaim in Mechanical Reclaimers
    Autorzy:
    Dańko, R.
    Pietrzak, A.
    Gruszka, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/2161212.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    mechanical reclamation
    reclamation process
    regeneration
    foundry engineering
    fenol resin
    moulding sand
    regeneracja mechaniczna
    proces rekultywacji
    regeneracja
    inżynieria odlewnicza
    żywica fenolowa
    Opis:
    The method of the ongoing assessment of the reclaim quality originating from the mechanical reclamation is described in this paper. In the process, the triboelectric system of measuring amounts of dust in the dedusting part of a reclamation device was applied. Based on the online measurements of the amounts of dust generated in the spent sand-reclamation process and the post-process determinations of the ignition losses and granular structures of the removed dust, the proper work parameters of the experimental reclaimer were selected. The allowable value of the ignition losses as well as the main fraction of the reclaimed matrix being similar to fresh sand was assumed as the main criteria of the positive assessment of the process. Within the presented investigations, a periodically operating device for rotor-mechanical reclamation was developed. The possibility of changing the intensity and time of the reclamation treatment as well as the triboelectric system of the dust-amount measuring were applied in this device. Tests were performed for the spent moulding sand with phenol-resol resin Carbophen 5692 hardened by CO2. This sand represents the moulding sand group with a less harmful influence on the surroundings for which the recovery of the quartz matrix utilising the reclamation requires stricter control of the parameters of the reclamation process and reclaim quality.
    Źródło:
    Archives of Foundry Engineering; 2022, 22, 2; 63--70
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wpływ dodatku regeneratu na właściwości mas z żywicą furanową stosowanych na formy do odlewów ze staliwa manganowego
    Influence of the reclaim on the properties of moulding sands with furfuryl resin applied for moulds for manganese steel castings
    Autorzy:
    Holtzer, M.
    Bobrowski, A.
    Drożyński, D.
    Isendorf, B.
    Mazur, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/381676.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    staliwo manganowe
    masa furanowa
    regeneracja mechaniczna
    spoiwo furanowe
    manganese cast steel
    furan moulding sand
    mechanical reclamation
    furan binder
    Opis:
    W artykule omówiono wpływ dodatku regeneratu uzyskiwanego w procesie regeneracji mechanicznej do masy z żywicą furfurylową na osnowie piasku kwarcowego. Określono wpływ udziału regeneratu na takie parametry masy jak: wytrzymałość na rozciąganie, ścieralność, przepuszczalność i żywotność masy. Badania prowadzono przy udziale regeneratu w osnowie w ilości od 20 do 100%. Uzyskane wyniki wykazały, że optymalne właściwości, uzyskuje masa o składzie 60% regeneratu, 1 cz. mas. żywicy i 0,5 cz. mas. utwardzacza.
    The influence of an addition of the reclaim, obtained in the mechanical reclamation process, to the moulding sand prepared on the basis of the high-silica sand with furfuryl resin, was discussed in the paper. The influence of the reclaim fraction on such moulding sand parameters as: tensile strength, wear resistance, permeability and bench life, was determined. Tests were performed at the reclaim fraction in the matrix being from 20 to 100%. The obtained results indicated that the optimal properties were exhibited by the moulding sand containing 60% of the reclaim, 40% new sand and 1 part by weigh of a resin and 0.5 part by weight of a hardener.
    Źródło:
    Archives of Foundry Engineering; 2012, 12, 1s; 57-62
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    State of Spent Molding Sands in the Mold Large-Size Cast
    Autorzy:
    Łucarz, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/380064.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    spent moulding sand
    organic binder
    thermal destruction
    ignition loss
    mechanical reclamation
    thermal reclamation
    masa formierska
    spoiwo organiczne
    deformacja cieplna
    strata prażenia
    regeneracja mechaniczna
    regeneracja termiczna
    Opis:
    The results of investigations of spent moulding sands taken from the mould at various distances from the surface of the produced casting, are presented in the paper. The casting mould was made with an application of the cooling system of the metal core in order to increase the cooling rate of the ladle casting. As temperature measurements in the mould indicated the heat flow from the metal did not create conditions for the complete burning of a moulding sand. The analysis was performed to find out changes of spent moulding sands caused by degradation and destruction processes of organic binders. Conditions occurring in the casting mould were discussed on the bases of testing: ignition losses, dusts contents, pH reactions and the surface morphology of the moulding sand samples. Factors limiting the effective mould degassing were pointed out. Operations, possible for realisation, which can limit the reasons of a periodical occurrence of increased amounts of casting defects due to changing gas evolution rates being the result of the technological process, were also indicated.
    Źródło:
    Archives of Foundry Engineering; 2016, 16, 4; 69-74
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Conditions of Thermal Reclamation Process Realization on a Sample of Spent Moulding Sand from an Aluminum Alloy Foundry Plant
    Autorzy:
    Łucarz, M.
    Dereń, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/382337.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    spent moulding sand
    organic binders
    thermal destruction
    ignition loss
    mechanical reclamation
    thermal reclamation
    zużyte masy formierskie
    spoiwa organiczne
    zniszczenie termiczne
    straty prażenia
    regeneracja mechaniczna
    regeneracja termiczna
    Opis:
    The results of investigations of thermal reclamation of spent moulding sands originating from an aluminum alloy foundry plant are presented in this paper. Spent sands were crushed by using two methods. Mechanical fragmentation of spent sand chunks was realized in the vibratory reclaimer REGMAS. The crushing process in the mechanical device was performed either with or without additional crushing-grinding elements. The reclaimed material obtained in this way was subjected to thermal reclamations at two different temperatures. It was found that a significant binder gathering on grain surfaces favors its spontaneous burning, even in the case when a temperature lower than required for the efficient thermal reclamation of furan binders is applied in the thermal reclaimer. The burning process, initiated by gas burners in the reclaimer chamber, generates favorable conditions for self-burning (at a determined amount of organic binders on grain surfaces). This process is spontaneously sustained and decreases the demand for gas. However, due to the significant amount of binder, this process is longer than in the case of reclaiming moulding sand prepared with fresh components.
    Źródło:
    Archives of Foundry Engineering; 2017, 17, 2; 197-201
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Synergy of practical knowledge of molding sands reclamation in heavy casting foundry of iron alloys
    Autorzy:
    Ignaszak, Z.
    Prunier, J. B.
    Powiązania:
    https://bibliotekanauki.pl/articles/379704.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    furan molding sand
    dry mechanical reclamation
    iron alloy foundry
    heavy casting
    lifetime
    furan sand
    thermo mechanical database
    masa formierska furanowa
    sucha regeneracja mechaniczna
    stop żelaza
    odlew ciężki
    trwałość
    baza danych termomechaniczna
    Opis:
    The paper summarizes research realized by the author in laboratory and industrial conditions (foundries of cast steel and cast iron, castings up to 50 tons) on the effects of the chemically hardened molding sands regeneration using hard/soft rubbing in the dry reclamation. A reference was simultaneously made to advisability of application of the thermal regeneration in conditions, where chromite amount in the circulating (reclaimed) molding sand goes as high as above ten percent. An advisability of connecting standard and specialized methods of examination of the reclaimed sands and molding sands made using it was pointed out. A way of application of studies with the Hot Distortion Plus® method modified by the author for validation of modeling of the thermo-dynamic phenomena in the mold was shown.
    Źródło:
    Archives of Foundry Engineering; 2013, 13, 3; 30-36
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Reclamation of self-setting mixtures with olivine bound with alkaline resols
    Autorzy:
    Jelínek, P.
    Duda, J.
    Mikšovský, F.
    Beňo, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/382404.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    innowacyjne technologie odlewnicze
    innowacyjne materiały odlewnicze
    właściwości mechaniczne
    regeneracja
    innovative foundry technologies
    innovative foundry material
    mechanical properties
    self setting mixtures
    alkaline resols
    reclamation
    Opis:
    For the reasons of environmental problems connected with the use of furan binders the attention is increasingly paid to self-setting mixtures with alkali resols. A resol binder stabilized with KOH, NaOH is hardened by liquid esters with the formation of alkaline salts. The increase of their concentration affects the shortening of the mixture bench life, it decreases strength, abrasive wear of moulds and cores is growing, and it results in uneconomical dilution of the reclaim with expensive new base sand. Length of life (bench life) of mixtures plays an important role just in manufacture of huge and voluminous moulds and cores in self-setting mixtures. This contribution aims at analyzing the function of reactive alkaline salts in the reclaim, it monitors consequences of its thermal exposure on properties of self-setting mixtures, and it deals with development of methods evaluating its qualities.
    Źródło:
    Archives of Foundry Engineering; 2012, 12, 1; 47-52
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-10 z 10

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