GB1025581A - Improvements in or relating to the manufacture of flat glass - Google Patents
Improvements in or relating to the manufacture of flat glassInfo
- Publication number
- GB1025581A GB1025581A GB3275863A GB3275863A GB1025581A GB 1025581 A GB1025581 A GB 1025581A GB 3275863 A GB3275863 A GB 3275863A GB 3275863 A GB3275863 A GB 3275863A GB 1025581 A GB1025581 A GB 1025581A
- Authority
- GB
- United Kingdom
- Prior art keywords
- layer
- molten metal
- molten
- compound
- 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
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B18/00—Shaping glass in contact with the surface of a liquid
- C03B18/02—Forming sheets
- C03B18/18—Controlling or regulating the temperature of the float bath; Composition or purification of the float bath
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Electrolytic Production Of Metals (AREA)
Abstract
<PICT:1025581/C1/1> In the manufacture of flat glass by the floatation technique such as described in Specification 893,663 there is maintained in the molten metal a trace of an additive metal with which an impurity in the molten metal preferentially reacts, this product of reaction then being removed from the molten metal by a molten layer of a compound maintained in contact with a zone of the molten metal, which takes up the reaction product. A fresh surface of the compound is continually presented at the interface between the compound and the molten metal. This is preferably done by making the molten layer a fluoride compound which when an electric current is applied to it causes the electrolytic release of the impurity which is then removed from the molten layer. Pockets 31 of the molten metal bath are formed in the side walls of the tank. The wall 6 forms a partition extending down into the molten metal to define a channel 34 connecting the pocket 31 to the bath. The pocket 31 is enclosed and a protective atmosphere is maintained therein through duct 38. A layer 39 of a fluoride of an additive element is confined in the pocket on the surface of the molten metal. Any dross formed rises to the surface and into the layer 39. By passing a direct current through an electrode 40 in the layer 39 and an electrode 42 in the molten metal such that the molten metal becomes the negative electrode, electrolysis is set up which releases the impurity from the additive element in the layer 39 and allows the additive element to be returned to the molten metal bath. To maintain the layer 39 molten at the cold end of the tank auxiliary electrodes may be inserted in the layer 39 and connected to an A.C. supply. The current passing between the electrodes 40, 41 is controlled at 100 amps and 5 volts. In an alternative embodiment, Fig. 4 (not shown), the molten layer 67 is confined within a carbon frame 68 having a thin inner lining 69 of a non-porous refractory. A graphite electrode 70 passes through the pocket roof into the layer 67 and a connector bar 71, Fig. 5 (not shown), is mounted in an exit channel 80 of the pocket. These are connected to a D.C. source. Auxiliary electrodes 72, 73 are provided to maintain the layer 67 molten. The molten metal containing dross is caused to enter the pocket through a channel 79. To aid in the removal of dross an upward circulation of the molten metal to the interface is caused by an induction heater 76 having two legs 77, 78, through which the molten metal flows, mounted in the floor of the pocket. To help the circulation through the pocket a paddle-wheel 81 is mounted in the exit channel 80. If a non-electrolytic method is used such as with a molten layer of lithium potassium chloride or sodium potassium chloride or calcium barium chloride, the molten layer having taken up the dross may be decanted off, the impurity removed and the compound returned to the molten layer. The additive element is preferably selected from the group lithium, sodium, potassium, calcium, magnesium, strontium, barium, cerium, manganese, iron, zinc, boron, aluminium, silicon, titanium, zirconium, niobium and tantalum. Most preferably it is a fluoride compound of one or a mixture of these.
Priority Applications (28)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB32759/63A GB1025582A (en) | 1963-08-19 | 1963-08-19 | Improvements in or relating to the manufacture of flat glass |
GB3275863A GB1025581A (en) | 1963-08-19 | 1963-08-19 | Improvements in or relating to the manufacture of flat glass |
DE19641471978 DE1471978B2 (en) | 1963-08-19 | 1964-08-14 | Process for the production of flat glass |
DE19641471979 DE1471979B2 (en) | 1963-08-19 | 1964-08-14 | Method and device for the production of flat glass |
IL21912A IL21912A (en) | 1963-08-19 | 1964-08-14 | Manufacture of flat glass |
US390015A US3330635A (en) | 1963-08-19 | 1964-08-17 | Method and apparatus for decontaminating a glass sheet making molten metal bath |
US390014A US3330637A (en) | 1963-08-19 | 1964-08-17 | Method of removing impurities in a molten metal bath for glass sheet making |
FI1758/64A FI43458B (en) | 1963-08-19 | 1964-08-18 | |
YU1184/64A YU32776B (en) | 1963-08-19 | 1964-08-18 | Uredaj za proizvodnju stakla |
FR985500A FR1407385A (en) | 1963-08-19 | 1964-08-18 | Improvements to processes and devices for manufacturing flat glass in contact with molten metal |
YU1834/64A YU32777B (en) | 1963-08-19 | 1964-08-18 | Uredai za proizvodnju ravnog stakla |
NL6409495A NL6409495A (en) | 1963-08-19 | 1964-08-18 | |
FR985501A FR1407386A (en) | 1963-08-19 | 1964-08-18 | Improvements to processes and devices for the manufacture of flat glass |
FI1759/64A FI43912B (en) | 1963-08-19 | 1964-08-18 | |
NL646409492A NL139725B (en) | 1963-08-19 | 1964-08-18 | METHOD AND EQUIPMENT FOR THE MANUFACTURE OF FLAT GLASS AND FLAT GLASS, OBTAINED BY APPLYING THIS METHOD. |
AT718364A AT255044B (en) | 1963-08-19 | 1964-08-19 | Method and device for the production of flat glass |
CS4660A CS174101B2 (en) | 1963-08-19 | 1964-08-19 | |
LU46797D LU46797A1 (en) | 1963-08-19 | 1964-08-19 | |
BE652010A BE652010A (en) | 1963-08-19 | 1964-08-19 | |
BE652011A BE652011A (en) | 1963-08-19 | 1964-08-19 | |
CH1082264A CH429046A (en) | 1963-08-19 | 1964-08-19 | Process for the production of flat glass and device for carrying out the process |
LU46794D LU46794A1 (en) | 1963-08-19 | 1964-08-19 | |
BR161898/64A BR6461898D0 (en) | 1963-08-19 | 1964-08-19 | PROCESS AND APPLIANCE FOR FLAT GLASS MANUFACTURING |
CH1082364A CH431832A (en) | 1963-08-19 | 1964-08-19 | Process for the production of flat glass and device for carrying out the process |
BR161899/64A BR6461899D0 (en) | 1963-08-19 | 1964-08-19 | IMPROVEMENTS IN OR RELATING TO FLAT GLASS MANUFACTURING |
CS4661A CS168487B2 (en) | 1963-08-19 | 1964-08-19 | |
DK410064A DK109106C (en) | 1963-08-19 | 1964-08-19 | Method of manufacturing flat glass and apparatus for making the same. |
ES0307683A ES307683A1 (en) | 1963-08-19 | 1964-12-29 | An apparatus for its use in the manufacture of flat glass. (Machine-translation by Google Translate, not legally binding) |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3275863A GB1025581A (en) | 1963-08-19 | 1963-08-19 | Improvements in or relating to the manufacture of flat glass |
GB32759/63A GB1025582A (en) | 1963-08-19 | 1963-08-19 | Improvements in or relating to the manufacture of flat glass |
GB3424464 | 1964-02-27 | ||
GB826064 | 1964-02-27 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1025581A true GB1025581A (en) | 1966-04-14 |
Family
ID=27447641
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3275863A Expired GB1025581A (en) | 1963-08-19 | 1963-08-19 | Improvements in or relating to the manufacture of flat glass |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB1025581A (en) |
-
1963
- 1963-08-19 GB GB3275863A patent/GB1025581A/en not_active Expired
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