Glass manufacturing – Processes – Fining or homogenizing molten glass
Reexamination Certificate
1999-08-02
2001-08-28
Colaianni, Michael P. (Department: 1731)
Glass manufacturing
Processes
Fining or homogenizing molten glass
C065S136100, C065S136300, C065S017200, C065S021100, C065S021500, C065S335000, C065S347000, C451S033000, C451S035000
Reexamination Certificate
active
06279351
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to a method and an apparatus for making glass and particularly ceramic frits.
Conventional methods for producing glass-like materials, such as sheet glass, bottle glass and ceramic frits, entail feeding the melting furnaces with mixtures of various materials in powder form with controlled particle size and humidity. The raw materials that compose the mixture must be first dry-ground, transferred to the glass-making site, stored and then metered with the aid of machines such as vibrating hoppers or fluids for extraction from the storage silos, screw feeders or belts, dosage chambers mounted on load cells, mixers, and finally conveyed with the aid of a pneumatic conveyance systems. The various steps of this production process have several financial and production-related drawbacks, linked to the dry grinding of the individual raw materials, to the steps for transferring and storing the powders, and to their mixing; theses production plants are further burdened by a high level of management complexity.
SUMMARY OF THE INVENTION
The aim of the present invention is to obviate the above-described drawbacks of the known methods, i.e., to provide a method for making glass which allows reduced costs, higher effectiveness and flexibility in the management of the treatment system.
Within the scope of this aim, an object of the present invention is to carry out the above method with an apparatus which has a simple structure, is relatively easy to provide in practice, safe in use, effective in operation and relatively modest in cost.
This aim, this object and others which will become more apparent hereinafter, are achieved by a method for making glass and particularly ceramic frits, characterized in that it comprises the steps of:
introducing in a wet grinding unit, after a metering step according to chosen proportions, materials which constitute a mixture to be melted, to produce a slurry;
screening and collecting said slurry in a storage tank;
introducing the collected slurry in a melting furnace to make a liquid component of the slurry evaporate; and
forming a melted paste of vitreous material, adapted to be converted into a ceramic frit.
The characteristics of the apparatus for performing the glass-making method are defined in the claims.
REFERENCES:
patent: 2271845 (1942-02-01), Parsons
patent: 2634555 (1953-04-01), Henry et al.
patent: 3065090 (1962-11-01), Hopkins
patent: 3542534 (1970-11-01), Yamamoto
patent: 3788832 (1974-01-01), Nesbitt et al.
patent: 3798018 (1974-03-01), Paridon et al.
patent: 4184861 (1980-01-01), Erickson et al.
patent: 4225332 (1980-09-01), Tsay
patent: 4826521 (1989-05-01), Wiechmann et al.
patent: 94237 (1972-12-01), None
patent: 112638 (1975-04-01), None
patent: 122620 (1976-10-01), None
patent: 3726832 (1989-02-01), None
Perry et al., Perry's Chemical Engineers' Handbook, 6th Ed., pp. 6-6 to 6-7, 6-10 to 6-13, 1984.
Acerbi Pierugo
Bresciani Andrea
Colaianni Michael P.
Josif Albert
Modiano Guido
O'Byrne Daniel
Sacmi Cooperativa Meccanici Imola S.c.r.l.
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