Plastic and nonmetallic article shaping or treating: processes – Formation of solid particulate material directly from molten... – By extrusion spraying or gravity fall through orifice
Patent
1978-11-14
1980-12-09
Czaja, Donald E.
Plastic and nonmetallic article shaping or treating: processes
Formation of solid particulate material directly from molten...
By extrusion spraying or gravity fall through orifice
264 39, B01J 204
Patent
active
042384281
ABSTRACT:
In a process for making a prilled product from a molten substance therefor steam or heated gas is intermittently introduced into the prilling apparatus to clean the apparatus. In one embodiment the molten substance is passed through a filter zone prior to introduction to a nozzle provided with orifices to produce the prilled product and the flow of molten substance through the filter zone is periodically interrupted and steam or heated gas is passed through the filter zone in the direction opposite to the flow of molten substance to clean the filter zone. More than one filter zone can be operated in parallel so that while one filter zone is being cleaned, molten substance is passed through another filter zone to provide for continuous operation of the process.
REFERENCES:
patent: 2898625 (1959-08-01), Chao
patent: 3642393 (1972-02-01), Ross et al.
Sasaki Susumu
Takemota Tamikazu
Tomita Shoji
Casella Peter F.
Czaja Donald E.
Hall James R.
Mudd James F.
Sumitomo Durez Company Ltd.
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