SU1507755A1 - Charge for producing hollow granules - Google Patents
Charge for producing hollow granules Download PDFInfo
- Publication number
- SU1507755A1 SU1507755A1 SU874305656A SU4305656A SU1507755A1 SU 1507755 A1 SU1507755 A1 SU 1507755A1 SU 874305656 A SU874305656 A SU 874305656A SU 4305656 A SU4305656 A SU 4305656A SU 1507755 A1 SU1507755 A1 SU 1507755A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- granules
- charge
- density
- cao
- thermal conductivity
- Prior art date
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Classifications
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/009—Porous or hollow ceramic granular materials, e.g. microballoons
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/48—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on zirconium or hafnium oxides, zirconates, zircon or hafnates
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Composite Materials (AREA)
- Manufacturing & Machinery (AREA)
- Compositions Of Oxide Ceramics (AREA)
Abstract
Изобретение относитс к керамическим материалам, примен емым дл изготовлени высокотемпературных футеровок тепловых агрегатов. С целью снижени их плотности и теплопроводности, а также повышени прочности гранул шихта дл получени полых гранул включает, мас.%:ZRO2 91,5-94,5The invention relates to ceramic materials used for the manufacture of high-temperature linings of thermal units. In order to reduce their density and thermal conductivity, as well as to increase the strength of granules, the mixture for obtaining hollow granules includes, in wt.%: ZRO 2 91.5-94.5
CAO 4,5-6,5CAO 4.5-6.5
MGO 0,5-1,0MGO 0.5-1.0
по крайней мере один окисел из группы SIO2, TIO2, AL2O3 0,5-1,0. Пустотелые гранулы, изготовленные из шихты указанного состава, имеют плотность 1,25-1,29 г/см3, прочность на раздавливание 10,2-10,8 Н, теплопроводность 0,61-0,62 Вт/(м.К). 1 табл.at least one oxide from the group SIO 2 , TIO 2 , AL 2 O 3 0.5-1.0. Hollow pellets made from the charge of said composition have a density of 1,25-1,29 g / cm 3 and a crush strength of 10,2-10,8 N, 0,61-0,62 thermal conductivity W / (m. K) . 1 tab.
Description
Изобретение относитс к составам пустотелых керамических гранул, примен емых дл изготовлени высокотемпературных футеровок тепловых агрегатов , например, дл теплоизол ции иридиевого тигл с расплавом гадолиний - галлиевого граната, нагреваемого индукционным током частотой от 8 до 450 кГц в атмосфере азота с добавкой кислорода шш углекислого газа.The invention relates to hollow ceramic granule compositions used to make high-temperature linings of thermal units, for example, to insulate an iridium crucible with a gadolinium-gallium garnet melt heated by an induction current with a frequency of 8 to 450 kHz in a nitrogen atmosphere with oxygen added carbon dioxide.
Цель изобретени - снижение плотности и теплопроводности, а также повышение прочности гранул.The purpose of the invention is to reduce the density and thermal conductivity, as well as increase the strength of the granules.
Получение полых циркониевых гранул осуществл ют следующим образом.The preparation of hollow zirconium granules is carried out as follows.
Исходную шихту, состо щую из ZrOj, СаО, модифицирующей добавки, например SiOj, TiO,, ,,или их смеси и MgO, плав т в дуговой электропечиThe initial mixture consisting of ZrOj, CaO, modifying additives, for example SiOj, TiO ,,, or their mixture and MgO, is melted in an electric arc furnace
при температуре выше 2600°С, Образующийс расплав выпускают струей посто нного дебита через калиброванное отверстие и распыл ют его энергоносителем 1 (сжатым воздухом или паром), -Образующиес при этом циркониевые гранулы вместе с потоком энергоносител попадают в осадительную камеру, оснащенную сетчатым накопителем. Готова продукци при необходимости рассеиваетс на фракции и затариваетс в мешки.at temperatures above 2,600 ° C, the resulting melt is jetsted at a constant flow rate through a calibrated orifice and sprayed with energy carrier 1 (compressed air or steam), the zirconium granules formed at the same time enter the precipitation chamber equipped with a mesh storage device. The finished product, if necessary, is dispersed into fractions and put into bags.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU874305656A SU1507755A1 (en) | 1987-09-11 | 1987-09-11 | Charge for producing hollow granules |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU874305656A SU1507755A1 (en) | 1987-09-11 | 1987-09-11 | Charge for producing hollow granules |
Publications (1)
Publication Number | Publication Date |
---|---|
SU1507755A1 true SU1507755A1 (en) | 1989-09-15 |
Family
ID=21327618
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SU874305656A SU1507755A1 (en) | 1987-09-11 | 1987-09-11 | Charge for producing hollow granules |
Country Status (1)
Country | Link |
---|---|
SU (1) | SU1507755A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
RU2698880C1 (en) * | 2018-04-09 | 2019-08-30 | федеральное государственное бюджетное образовательное учреждение высшего образования "Тамбовский государственный университет имени Г.Р. Державина" | Method of making ceramics based on zirconium dioxide |
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1987
- 1987-09-11 SU SU874305656A patent/SU1507755A1/en active
Non-Patent Citations (1)
Title |
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Гаоду А.Н. и др. Пустотелые гранулы и легковесные издели из них дл высокотемпературной- теплоизол ции. - Огнеупоры. 1976, № 9, с.47-50. * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
RU2698880C1 (en) * | 2018-04-09 | 2019-08-30 | федеральное государственное бюджетное образовательное учреждение высшего образования "Тамбовский государственный университет имени Г.Р. Державина" | Method of making ceramics based on zirconium dioxide |
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