SU1470731A1 - Initial composition for making porous moulds - Google Patents
Initial composition for making porous moulds Download PDFInfo
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- SU1470731A1 SU1470731A1 SU874234696A SU4234696A SU1470731A1 SU 1470731 A1 SU1470731 A1 SU 1470731A1 SU 874234696 A SU874234696 A SU 874234696A SU 4234696 A SU4234696 A SU 4234696A SU 1470731 A1 SU1470731 A1 SU 1470731A1
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- USSR - Soviet Union
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- corrosion resistance
- mgo
- refractory
- alkaline gas
- resistance
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- Compositions Of Oxide Ceramics (AREA)
Abstract
Изобретение относитс к плавленолитым огнеупорным материалам, используемым дл футеровки стекловаренных печей. Цель изобретени - повышение коррозионной стойкости огнеупора к действию щелочной газовой среды. Материал содержит в мас.%: AL2O3 77-91, NA2O 3-5, ZRO2 0,5-5, SIO2 0,5-3 и MGO 5-10. Термостойкость материала /нагрев до 1300°С - 15 минут выдержки - охлаждение на воздухе при комнатной температуре/ 15-18 теплосмен, коррозионна стойкость полученного огнеупора превосходит на 12-32% коррозионную стойкость огнеупора без добавлени MGO. 1 табл.The invention relates to fused cast refractory materials used for lining glass furnaces. The purpose of the invention is to increase the corrosion resistance of refractories to the action of an alkaline gas environment. The material contains in wt.%: AL 2 O 3 77-91, NA 2 O 3-5, ZRO 2 0.5-5, SIO 2 0.5-3 and MGO 5-10. Heat resistance of the material / heating up to 1300 ° C - 15 minutes of exposure - air cooling at room temperature / 15-18 heat changes, the corrosion resistance of the resulting refractory material exceeds the corrosion resistance of the refractory material by 12-32% without the addition of MGO. 1 tab.
Description
.1.one
Изобретение относитс к огнеупорной промышленности и может быть использовано дл изготовлени плавле- нолитых высокоглиноземистых огнеупоров дл футеровки стекловаренных печей .The invention relates to the refractory industry and can be used for the manufacture of molten high-alumina refractories for lining glass melting furnaces.
Целью изобретени вл етс повышение коррозионной стойкости огне- упора к действию щелочной газовой среды.The aim of the invention is to increase the corrosion resistance of the refractory to the action of an alkaline gaseous medium.
Дл получени огнеупорного материала готов т шихты, состо щие из глинозема, окиси магни , соды, двуокиси циркони и кварцевого песка.To obtain a refractory material, charge materials are prepared consisting of alumina, magnesia, soda, zirconia and silica sand.
Шихты плав т в электродуговой печи при напр жении на электродах 140-150 В и токе 800-1200 А.The mixtures are melted in an electric arc furnace with a voltage across the electrodes of 140-150 V and a current of 800-1200 A.
Плавку.ведут в окислительных услови х (на открытой дуге, при подн тых над расплавом электродах). Расплав заливают в графитовые литейные формы, после чего полученные отливки отжигают в естественных услови хMelting will be carried out in oxidizing conditions (on an open arc, with electrodes raised above the melt). The melt is poured into graphite casting molds, after which the resulting castings are annealed in natural conditions.
в термо щиках с,диатомитовой засыпкой в течение 3-4 сутГin thermo boxes with diatomaceous backfill for 3-4 suts
Составы предлагаемого огнеупорного материла представлены в таблице.The compositions of the proposed refractory material are presented in the table.
Коррозионную стойкость огнеупоров к действию щелочной газовой среды оценивают по методике ГИС. Образ- ;:цы толщиной 4,5-5,5 мм, помещенные в электрическую нагревательную печь, подвергают коррозионному воздействию газопламенного потока, в который непрерывно подают смесь сульфата и карбоната натри (в соотношении 1:1) при расходе смеси 20 г/ч. Опыт провод т до образовани сквозного прогрева в образце. Скорость коррозии W испытуемого образца огнеупора вычисл ют, исход из толщины образца о мм и продолжительности опыта мин, по формуле W мм/ч.Corrosion resistance of refractories to the action of an alkaline gas environment is estimated by the method of GIS. Samples;;: tsi with a thickness of 4.5-5.5 mm, placed in an electric heating furnace, are subjected to corrosive effects of a gas-flame flow, in which a mixture of sulphate and sodium carbonate is continuously fed (in a ratio of 1: 1) at a flow rate of 20 g / h . The test was carried out until a warm-up was formed in the sample. The corrosion rate W of the refractory sample to be tested is calculated on the basis of the thickness of the sample about mm and the duration of the experiment min, using the formula W mm / h.
За 100% коррозионной стойкости к щелочной газовой среде принимают стойкость огнеупора состав а 7, %:For 100% corrosion resistance to alkaline gas environment take the resistance of the refractory composition and 7,%:
(Л(L
о about
соwith
, 88,9, Na,jO 4,4, ггОг 3,6, SiO 2,4, , 0,7 при ISOO c, характеризующегос средней (по 3 образцам ) W 6,5 мм/ч., 88.9, Na, jO 4.4, yrOg 3.6, SiO 2.4, 0.7, at ISOO c, characterized by an average (3 samples) W 6.5 mm / h.
. Термостойкость материала определ ют по максимальному количеству закалочных теплосмен (нагрев до. The heat resistance of the material is determined by the maximum number of quenching heat cycles (heating to
термостойкостью, по коррозионной стойкости к действию щелочной газовой среды огнеупорные материалы с добавлением 5-10% MgO (составы 1-6) превосход т огнеупоры без добавок MgO (составы 7, 8) на 12-32%.heat resistance, in terms of corrosion resistance to the action of alkaline gas environment, refractory materials with the addition of 5-10% MgO (compounds 1-6) are superior to refractories without the addition of MgO (compounds 7, 8) by 12-32%.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU874234696A SU1470731A1 (en) | 1987-04-23 | 1987-04-23 | Initial composition for making porous moulds |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU874234696A SU1470731A1 (en) | 1987-04-23 | 1987-04-23 | Initial composition for making porous moulds |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU1470731A1 true SU1470731A1 (en) | 1989-04-07 |
Family
ID=21300196
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU874234696A SU1470731A1 (en) | 1987-04-23 | 1987-04-23 | Initial composition for making porous moulds |
Country Status (1)
| Country | Link |
|---|---|
| SU (1) | SU1470731A1 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120260696A1 (en) * | 2011-03-30 | 2012-10-18 | Saint-Gobain Ceramics & Plastics, Inc. | Refractory object, glass overflow forming block, and process of forming and using the refractory object |
| US9073773B2 (en) | 2011-03-11 | 2015-07-07 | Saint-Gobain Ceramics & Plastics, Inc. | Refractory object, glass overflow forming block, and process for glass object manufacture |
| US20150353427A1 (en) * | 2012-12-19 | 2015-12-10 | Saint-Gobain Center De Recherches Et D'etudes Europeen | Alumina-magnesia product for gasifier or for metallurigical furnace |
| US9216928B2 (en) | 2011-04-13 | 2015-12-22 | Saint-Gobain Ceramics & Plastics, Inc. | Refractory object including beta alumina and processes of making and using the same |
| US9249043B2 (en) | 2012-01-11 | 2016-02-02 | Saint-Gobain Ceramics & Plastics, Inc. | Refractory object and process of forming a glass sheet using the refractory object |
| US11814317B2 (en) | 2015-02-24 | 2023-11-14 | Saint-Gobain Ceramics & Plastics, Inc. | Refractory article and method of making |
-
1987
- 1987-04-23 SU SU874234696A patent/SU1470731A1/en active
Non-Patent Citations (1)
| Title |
|---|
| Авторское свидетельство СССР № 814977, кл. С 04 В 35/62, 1981. * |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9073773B2 (en) | 2011-03-11 | 2015-07-07 | Saint-Gobain Ceramics & Plastics, Inc. | Refractory object, glass overflow forming block, and process for glass object manufacture |
| US9714185B2 (en) | 2011-03-11 | 2017-07-25 | Saint-Gobain Ceramics & Plastics, Inc. | Refractory object, glass overflow forming block, and process for glass object manufacture |
| US20120260696A1 (en) * | 2011-03-30 | 2012-10-18 | Saint-Gobain Ceramics & Plastics, Inc. | Refractory object, glass overflow forming block, and process of forming and using the refractory object |
| US9174874B2 (en) * | 2011-03-30 | 2015-11-03 | Saint-Gobain Ceramics & Plastics, Inc. | Refractory object, glass overflow forming block, and process of forming and using the refractory object |
| US9796630B2 (en) | 2011-03-30 | 2017-10-24 | Saint-Gobain Ceramics & Plastics, Inc. | Refractory object, glass overflow forming block, and process of forming and using the refractory object |
| US9216928B2 (en) | 2011-04-13 | 2015-12-22 | Saint-Gobain Ceramics & Plastics, Inc. | Refractory object including beta alumina and processes of making and using the same |
| US9249043B2 (en) | 2012-01-11 | 2016-02-02 | Saint-Gobain Ceramics & Plastics, Inc. | Refractory object and process of forming a glass sheet using the refractory object |
| US9902653B2 (en) | 2012-01-11 | 2018-02-27 | Saint-Gobain Ceramics & Plastics, Inc. | Refractory object and process of forming a glass sheet using the refractory object |
| US10590041B2 (en) | 2012-01-11 | 2020-03-17 | Saint-Gobain Ceramics & Plastics, Inc. | Refractory object and process of forming a glass sheet using the refractory object |
| US20150353427A1 (en) * | 2012-12-19 | 2015-12-10 | Saint-Gobain Center De Recherches Et D'etudes Europeen | Alumina-magnesia product for gasifier or for metallurigical furnace |
| US9593048B2 (en) * | 2012-12-19 | 2017-03-14 | Saint-Gobain Centre De Recherches Et D'etudes Europeen | Alumina-magnesia product for gasifier or for metallurgical furnace |
| US11814317B2 (en) | 2015-02-24 | 2023-11-14 | Saint-Gobain Ceramics & Plastics, Inc. | Refractory article and method of making |
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