GB984825A - Improvements in or relating to the refining of glass and like molten thermoplastic materials - Google Patents

Improvements in or relating to the refining of glass and like molten thermoplastic materials

Info

Publication number
GB984825A
GB984825A GB2317861A GB2317861A GB984825A GB 984825 A GB984825 A GB 984825A GB 2317861 A GB2317861 A GB 2317861A GB 2317861 A GB2317861 A GB 2317861A GB 984825 A GB984825 A GB 984825A
Authority
GB
United Kingdom
Prior art keywords
dam
glass
impurities
drains
forehearth
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB2317861A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
OI Glass Inc
Original Assignee
Owens Illinois Glass Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Owens Illinois Glass Co filed Critical Owens Illinois Glass Co
Publication of GB984825A publication Critical patent/GB984825A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B5/00—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture
    • C03B5/16—Special features of the melting process; Auxiliary means specially adapted for glass-melting furnaces
    • C03B5/20—Bridges, shoes, throats, or other devices for withholding dirt, foam, or batch
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B5/00—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture
    • C03B5/16—Special features of the melting process; Auxiliary means specially adapted for glass-melting furnaces
    • C03B5/26—Outlets, e.g. drains, siphons; Overflows, e.g. for supplying the float tank, tweels
    • C03B5/262—Drains, i.e. means to dump glass melt or remove unwanted materials
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B7/00—Distributors for the molten glass; Means for taking-off charges of molten glass; Producing the gob, e.g. controlling the gob shape, weight or delivery tact
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B7/00—Distributors for the molten glass; Means for taking-off charges of molten glass; Producing the gob, e.g. controlling the gob shape, weight or delivery tact
    • C03B7/005—Controlling, regulating or measuring

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Glass Melting And Manufacturing (AREA)

Abstract

<PICT:0984825/C1/1> <PICT:0984825/C1/2> A method of refining molten thermoplastic materials (e.g. glass) by concentrating and separating impurities which collect in the lower layers in the forehearth, comprises maintaining the glass at a suitable temperature by a series of burners placed adjacent the glass surface, and/or by submerged electrodes, and causing the molten glass to flow over a dam submerged to a depth of at least one half of the liquid level, and extending the width of the forehearth, thus accelerating the liquid flow, and causing the impure layers to be directed towards side drains of the dam, through which the impurities may be directed to a waste container. The drains, preferably constructed in platinum or platinum alloy may be electrically heated, and extend through the side walls on the down stream end of the dam at the same level as the dam crest and may slope downwardly for easy drainage. The dam constructed of refractory blocks 25 (Fig. 2), may be situated near the feeding orifice or further upstream. The glass flows upwardly and outwardly as indicated at 30, the impurities collect near drain-pipes 26 and pass into waste tank 27 and may be re-used in further batches. The side drains 32 of the dam may alternatively be disposed vertically through the interior of the dam, Fig. 5.
GB2317861A 1960-06-28 1961-06-27 Improvements in or relating to the refining of glass and like molten thermoplastic materials Expired GB984825A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US3939460A 1960-06-28 1960-06-28

Publications (1)

Publication Number Publication Date
GB984825A true GB984825A (en) 1965-03-03

Family

ID=21905209

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2317861A Expired GB984825A (en) 1960-06-28 1961-06-27 Improvements in or relating to the refining of glass and like molten thermoplastic materials

Country Status (1)

Country Link
GB (1) GB984825A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008116975A1 (en) * 2007-03-28 2008-10-02 Paroc Oy Ab Apparatus and method for feeding melt, use of the apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008116975A1 (en) * 2007-03-28 2008-10-02 Paroc Oy Ab Apparatus and method for feeding melt, use of the apparatus

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