GB2238859A - Glass-melting pot - Google Patents
Glass-melting pot Download PDFInfo
- Publication number
- GB2238859A GB2238859A GB9010050A GB9010050A GB2238859A GB 2238859 A GB2238859 A GB 2238859A GB 9010050 A GB9010050 A GB 9010050A GB 9010050 A GB9010050 A GB 9010050A GB 2238859 A GB2238859 A GB 2238859A
- Authority
- GB
- United Kingdom
- Prior art keywords
- pot
- opening
- fire clay
- walls
- roof
- 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.)
- Granted
Links
- 238000002844 melting Methods 0.000 title description 3
- 239000004927 clay Substances 0.000 claims abstract description 15
- 239000000463 material Substances 0.000 claims abstract description 15
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 claims abstract description 6
- 229910052863 mullite Inorganic materials 0.000 claims abstract description 6
- 229910052845 zircon Inorganic materials 0.000 claims abstract description 6
- GFQYVLUOOAAOGM-UHFFFAOYSA-N zirconium(iv) silicate Chemical group [Zr+4].[O-][Si]([O-])([O-])[O-] GFQYVLUOOAAOGM-UHFFFAOYSA-N 0.000 claims abstract description 6
- 238000010276 construction Methods 0.000 claims abstract description 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 6
- 239000011521 glass Substances 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 230000006866 deterioration Effects 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 239000000446 fuel Substances 0.000 description 3
- 239000003345 natural gas Substances 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 229910052681 coesite Inorganic materials 0.000 description 2
- 238000011109 contamination Methods 0.000 description 2
- 229910052906 cristobalite Inorganic materials 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 235000012239 silicon dioxide Nutrition 0.000 description 2
- 229910052682 stishovite Inorganic materials 0.000 description 2
- 229910052905 tridymite Inorganic materials 0.000 description 2
- KKCBUQHMOMHUOY-UHFFFAOYSA-N Na2O Inorganic materials [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 239000012768 molten material Substances 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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
- C03B5/06—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture in pot furnaces
- C03B5/08—Glass-melting pots
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
Abstract
A pot primarily of fire clay construction and suitable for use at temperatures of between 1200 DEG C and 1800 DEG C which pot comprises a base (12), upstanding side walls (14), a rear wall, a front wall (13) and a roof (15) which together define a chamber (11). A closable opening in one of the walls for the movement of material therethrough is also provided. The opening has a base portion (17), upstanding walls (18, 19) and a roof portion (20). At least part of the opening comprises a material other than fire clay capable of withstanding temperatures of between 1200 DEG C and 1800 DEG C. In a preferred embodiment of the invention, the material other than fire clay is zircon mullite.
Description
IMPROVEMENTS IN OR RELATING TO A POT
This invention relates to improvements in or relating to a pot. In particular, it relates to a pot furnace of the type used for enabling the ingredients which are used in the manufacture of glass to be melted.
A pot is made from fire clay containing about 30% A1203, 60% SiO2 and 10% of other known constituents.
The pot essentially comprises a chamber having an opening for enabling raw material, for the manufacture of glass, to be inserted therethrough for melting at a temperature of about 14500C. After about 36 hours, the molten material is ready for use and is removed by suitable tools for enabling the formation of glass products.
The pot is in continuous use and following a period of about thirteen weeks is discarded due to wear and tear primarily from the high temperatures used in the production of the molten product. The wear and tear is particularly evident in the walls of the opening and more particularly in the region of the base of the opening and the top of the opening.
Recently, it has been found that when using natural gas rather than oil as the fuel source for maintaining the temperature of the pot at the working temperature of about 12200C, corrosion in the vicinity of the top of the opening has resulted in a deterioration in the pot to the extent that the normal thirteen week period of use is reduced to between nine and eleven weeks depending on the degree and nature of corrosion. Although the reason for the corrosion has not been fully determined, it is believed to be as-a result of improved and more stable temperature conditions associated with the use of the natural gas as the fuel source. This, it is believed, has resulted in the production of gases which can escape through the mouth of the pot and which result in a more rapid deterioration in the region of the top of the opening.
With the deterioration in the top of the opening, the fire clay material falls into the chamber thus leading to an unacceptable level of contamination of the contents therein.
It is an object of the present invention to overcome these problems.
The invention, therefore, provides a pot primarily of fire clay construction and suitable for use at temperatures of between 12000C and 18000C which pot comprises a base, upstanding side walls, a rear wall, a front wall and a roof which together define a chamber; a closable opening in one of the walls for the movement of material therethrough; the opening having a base portion, upstanding walls and a roof portion; and wherein at least part of the opening comprises a material other than fire clay capable of withstanding temperatures of between 12000C and 18000C.
Preferably, the opening is located in the front wall.
Preferably, the material is located in the roof portion of the opening.
Preferably, the material is zircon mullite.
The invention will be understood in greater detail from the following description of a preferred embodiment thereof given by way of example only and with reference to the accompanying drawings in which:
Figure 1 is a perspective view of a pot according to the invention;
Figure 2 is a perspective view of an insert for use in the pot of Figure 1 of the drawings;
Figure 3 is a front elevation of the insert of Figure 2 of the drawings;
Figure 4 is a side elevation of the insert of Figure 2 of the drawings; and
Figure 5 is a cross-sectional view of part of the pot of Figure 1 of the drawings.
Referring now to the drawings, there is shown a pot 10 in accordance with the invention which comprises a chamber 11 defined by a base 12, a front wall 13, a rear wall (not shown) and side walls 14 which lead into a dome-shaped roof 15. The front wall 13 has an opening 16 defined by a base 17, side walls 18, 19 and top 20. The base 12, front wall 13, the rear wall, the side walls 14 the base 17 and side walls 18, 19 are made from a fire clay capable of withstanding temperatures of between 12000C and 18000C. The top 20 comprises a material other than fire clay capable of withstanding temperatures between 12000C and 18000C.
In the present embodiment the material is zircon mullite.
Referring now to Figures 2-4 of the drawings, there is shown the insert or top 20 which has a shape and configuration so as to provide a curved shaped upper section to the opening 16. The insert 20 has an upper part 21 and a curved shaped lower part 22 including a front wall 23 and a rear wall (not shown).
The upper part 21, lower part 22, front wall 23 and the rear wall lead into legs 24, 25 integral therewith.
The top 20 is manufactured separately from a pot. Essentially, the pot is manufactured entirely of fire clay. Following curing, an opening or slot of suitable dimensions is cut into the roof 15 and a section of the fire clay is removed. Through the slot is inserted the insert 20 with the legs 24, 25 being first inserted. The insert 20 is located so that the legs 24, 25 rest on side walls 18, 19. Following insertion, the insert 20 is sealed in position by zircon mullite and the recess, if present, over the upper part 21 is filled with a high temperature grade cement. The resulting combination constitutes the pot 10 according to the invention.
Following curing of the cement, the pot 10 according to the invention is ready for use. The pot 10 may be used in a conventional manner. In other words, raw material for use in the production of glass may be inserted into the chamber 11 via the opening 16 with the pot at a temperature of about 13500C. Following the required period for the melting of the raw material, the melted material is withdrawn using suitable tools and glass products made therefrom. The pot 10 according to the invention is designed for use continuously over a thirteen week period. This is achieved particularly when using natural gas as the fuel source for heating the furnace where the deterioration in the top 20 is significantly less when compared with a conventional pot made entirely of fire clay. In addition, the level of contamination of the contents of the pot 10 by pieces of fire clay falling into the chamber 16 is significantly reduced.
Having regard to the fact that the pot 10 can now be used for virtually the thirteen week period, significant capital expenditure savings may be achieved.
A typical chemical analysis in respect of the zircon mullite is given below
SiO2 15 %
Al203 73 %
ZrO2 11.1 % Foe203 0.2 %
TiO2 0.15%
CaO 0.10%
MgO 0.10%
Na2O < 0.30%
K20 0.10%
Apparent Porosity 22 %
Bulk Density 2.851 g.cm-3
Refractoriness Cone 36+
(18700C)
Cold Crushing Strength 90 MN,m-2 Reversible Thermal
Expansion 200C-10000C 0.63%
The invention is not limited by or to the specific embodiment described which can undergo considerable variation without departing from the scope of the invention.
Claims (5)
1. A pot primarily of fire clay construction and suitable for use at temperatures of between 12000C and 18000C which pot comprises a base, upstanding side walls, a rear wall, a front wall and a roof which together define a chamber; a closable opening in one of the walls for the movement of material therethrough; the opening having a base portion, upstanding walls and a roof portion; and wherein at least part of the opening comprises a material other than fire clay capable of withstanding temperatures of between 12000C and 18000C.
2. A pot as claimed in Claim 1 wherein the opening is located in the front wall.
3. A pot as claimed in Claim 1 or Claim 2 wherein the material is located in the roof portion of the opening.
4. A pot as claimed in any of Claims 1-3 wherein the material is zircon mullite.
5. A pot substantially as hereinbefore described with reference to and as illustrated in the accompanying drawings.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IE390989A IE62141B1 (en) | 1989-12-06 | 1989-12-06 | Improvements in or relating to a pot |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB9010050D0 GB9010050D0 (en) | 1990-06-27 |
| GB2238859A true GB2238859A (en) | 1991-06-12 |
| GB2238859B GB2238859B (en) | 1993-11-03 |
Family
ID=11039209
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB9010050A Expired - Fee Related GB2238859B (en) | 1989-12-06 | 1990-05-03 | Improvements in or relating to a pot |
Country Status (3)
| Country | Link |
|---|---|
| GB (1) | GB2238859B (en) |
| IE (1) | IE62141B1 (en) |
| ZA (1) | ZA903562B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10378823B2 (en) | 2012-08-01 | 2019-08-13 | Allied Mineral Products, Inc. | Reinforced refractory containers |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB384295A (en) * | 1930-03-01 | 1932-12-01 | Jenaer Glaswerk Schott & Gen | Improvements in tank furnaces for melting glass and similar fusible substances |
| GB450583A (en) * | 1935-05-15 | 1936-07-21 | Gen Electric Co Ltd | Improvements in receptacles for containing glass during manufacture |
| GB2002098A (en) * | 1977-08-05 | 1979-02-14 | Ariens J | Sealing furnace doors |
-
1989
- 1989-12-06 IE IE390989A patent/IE62141B1/en not_active IP Right Cessation
-
1990
- 1990-05-03 GB GB9010050A patent/GB2238859B/en not_active Expired - Fee Related
- 1990-05-10 ZA ZA903562A patent/ZA903562B/en unknown
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB384295A (en) * | 1930-03-01 | 1932-12-01 | Jenaer Glaswerk Schott & Gen | Improvements in tank furnaces for melting glass and similar fusible substances |
| GB450583A (en) * | 1935-05-15 | 1936-07-21 | Gen Electric Co Ltd | Improvements in receptacles for containing glass during manufacture |
| GB2002098A (en) * | 1977-08-05 | 1979-02-14 | Ariens J | Sealing furnace doors |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10378823B2 (en) | 2012-08-01 | 2019-08-13 | Allied Mineral Products, Inc. | Reinforced refractory containers |
Also Published As
| Publication number | Publication date |
|---|---|
| IE62141B1 (en) | 1994-12-14 |
| ZA903562B (en) | 1991-02-27 |
| GB9010050D0 (en) | 1990-06-27 |
| GB2238859B (en) | 1993-11-03 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 19990503 |