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Application of the Triboelectric Method for the Ongoing Assessment of the Quality of Reclaim in Mechanical Reclaimers

Dańko R., Pietrzak A., Gruszka D.

Archives of Foundry Engineering

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2022

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Vol. 22, iss. 2

63--70

EN

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.

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Research of Emission of Commercial Binders Used in ALPHASET Technology - Estimated Quantitative Analysis

Roczniak A., Holtzer M., Kmita A.

Archives of Foundry Engineering

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2018

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Vol. 18, iss. 1

109--114

EN

The results of investigations of three commercial binders applied in the Alphaset technology marked as: Sample E , Sample T and Sample S are presented in the hereby paper. These samples were subjected to the pyrolysis process at a temperature of 900°C (inert atmosphere, He 99.9999). The gas chromatograph coupled with the mass spectrometer and pyrolizer (Py-GC/MS) were used in the study. The identification of gases emitted during the thermal decomposition was performed on the basis of the mass spectral library. The obtained results indicate a certain diversification of emitted gases. Among the pyrolysis products the following harmful substances were identified: furfuryl alcohol, formaldehyde, phenol and also substances from the BTEX (benzene, toluene and ethylobezneze and xylenes) PAHs (Polycyclic Aromatic Hydrocarbons) and VOC groups (Volatile Organic Compounds). Therefore, from the environment protection point of view performing systematic investigations concerning the harmfulness of binders applied in the moulding and core sands technology, is essential.

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Wyroby wysokoglinowe modyfikowane SiC dla urządzeń metalurgicznych

Barański J., Witek J., Majchrowicz I.

Prace Instytutu Ceramiki i Materiałów Budowlanych

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2010

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R. 3, nr 6

67-72

PL

Przedstawiono charakterystykę fizykochemiczną nowego gatunku wyrobów wysokoglinowych, zmodyfikowanych poprzez wprowadzenie do ich składu chemicznego węglika krzemu (SiC). Podano wyniki badań aplikacyjnych wymienionych wyrobów w kadziach żeliwiakowych. Przeprowadzone próby wykazały blisko dwukrotny wzrost trwałości wymurówki kadzi w porównaniu z wyrobami standardowymi.

EN

The physicochemical characteristics of the new type of highalumina SiC-addition modified products was described. Results of application tests in cupola ladles were presented. Carried out tests showed almost double increase of ladle lining durability in comparison with conventional products.