PL128700B1 - Method of manufacturing refractories for steelmaking ladle lining - Google Patents

Method of manufacturing refractories for steelmaking ladle lining Download PDF

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Publication number
PL128700B1
PL128700B1 PL22339880A PL22339880A PL128700B1 PL 128700 B1 PL128700 B1 PL 128700B1 PL 22339880 A PL22339880 A PL 22339880A PL 22339880 A PL22339880 A PL 22339880A PL 128700 B1 PL128700 B1 PL 128700B1
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PL
Poland
Prior art keywords
granulation
products
mass
bauxite
less
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Application number
PL22339880A
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Polish (pl)
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PL223398A1 (en
Inventor
Justyn Stachurski
Jurand Bocian
Stanislaw Bednarczyk
Otto Przegendza
Zbigniew Kopczynski
Zbigniew Owczarski
Bohdan Kolomyjski
Roman Ryba
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Zarowskie Zaklady Materialow O
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Priority to PL22339880A priority Critical patent/PL128700B1/en
Publication of PL223398A1 publication Critical patent/PL223398A1/xx
Publication of PL128700B1 publication Critical patent/PL128700B1/en

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  • Treatment Of Steel In Its Molten State (AREA)
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Description

Przedmiotem wynalazku jest wytwarzanie ogniotrwalych wyrobów do wylozenia kadzi stalowniczych, zwlaszcza o duzej pojemnosci oraz kadzi stalowniczych przeznaczonych do pracy w bardzo trudnych warunkach termicznych i chemicznych.Znany jest sposób wytwarzania ogniotrwalych wyrobów do wylozenia obmurza kadzi stalowniozyoh, w którym wyroby wytwarzane sa z mas sypkich, w sklad których wchodzi od 60 do 90$ wagowych boksytu prazonego lub palonki wysokoglinowej od 10 do 30$ wagowych ogniotrwalej gliny surowej oraz od 1 do yfo wagowyoh lugu posiarczynowego, przy ozyu wyroby boksyt owe zawieraja 70 do 80# tlenku glinu, a wysokoglinowe 50 do 90# tlenku glinu* Z masy tej formuje sie wyrobyj nastepnie suszy sie je i wypala* Wada wyrobów wytwarzanych sposobem wedlug wynalazku jest zywotnosc ograniczona od 15 do 30 spustów* Istota sposobu wedlug wynalazku jest dodanie do masy na wyroby boksyt owe lub wysokogli¬ nowe tworzywa mulit owo-cyrkonów o-korundówego topionego elektrycznie, stanowiacego mie¬ szanine technicznego tlenku glinu i krzemianu cyrkonu z dodatkiem materialów o niskiej topliwosci* Tworzywa te o porowatosci ponizej 5$ rozdrabnia sie, a nastepnie przemiela do granulacji ponizej 5 mm korzystnie ponizej 3 mm* Nastepnie przygotowuje sie masy sypkie o wilgotnosci 2 do 6£f w sklad których wchodzi: kO do 80£ boksytu prazonego lub palonki wysokoglinowej wzglednie zlomu z wyrobów wysokoglinowych lub boksyt owych o granulacji od 0 do 3 mm lub 0 do 2 mm, w tym co najmniej 30# ziarn o granulacji ponizej 0f 1 mm, 5 do 5<# tworzywa mulit owo-cyrkonówo-korundowego, topionego elektrycznie, o granulacji ponizej 5 mm, korzystnie 3 mm, z tym, ze co najmniej 205* ziarn posiada granulacje ponizej 0, 1 mm, a co najmniej 305* ziarn granulacje powyzej 1 mmf 5 do 30# ogniotrwalej gliny surowej o granulacji 0 do 2 mm, korzystnie w postaci gestwy, 1 do k% lepiszcza, korzystnie lugu posiarczynowego*2 128 700 Z tak przygotowanej masy formuje sie wyroby pod olsnieniom minimum 50 MPa 1 po wysuszeniu do wllgotnosoi ponizej 1% wypala sie w temperaturze pomyleJ 1720 K, korzyst- nie w temperaturze 1870 K* Zaleta sposobu wedlug wynalazku jest zwiekszenie odpornosol wyrobów na dzialanie ozynnlków fizyoznyoh 1 ohenloznyoh nystopujaoyoh podesas eksploataojl kadzi stalownia ozyoh od 30 do 80%# Uzyskano Jednoozesnie wytrzymalosc na 6ciskanie wynoszaca ponad 35 MPa, porowatosc otwarta - ponizej 20% oraz wysoka ogniotrwalosó pod obolazenlem - przekraozajaoa 1820 K* Przyklad I«¥ mieszadle biegunowym przygotowuje sle eypka mase o wllgot¬ nosoi 4% w sklad której wchodzi: 40% prazonego boksytu o zawartosol 75% tlenku glinu 0 granulaoji 0 do 3 mm* * tym 40% ponizej 0,1 mm? 40% tworzywamalitowo-cyrkonowo-ko- rundowego, topionego elektrycznie, o granulaoji 0-3 mm, w tym 30% o granulaoji poni~ zej 0-1 mm? 20% ogniotrwalej gliny surowej o granulacji 0-2 mm 1 o ogniotrwalosoi zwyklej 1980 K, w tym 6% w postaci gestwy* Z masy tej formuje sle ksztaltki dla obmurza kadzi stalowniczych za pomoca prasy meohanloznej pod olsnieniem 60 MPa, a nastepnie suszy sie je do wllgotnosoi 0,5% 1 wypala w pleou tunelowym w temperaturze 1870 K* Przyklad II. V mieszadle kraznikowym miesza sie przy nawilzeniu do 5% nastepujaoe skladniki: 70% palonki wysokoglinowej o zawartosol 70% tlenku glinu o granulaoji 0-2 mm, w tym 45% ponizej 0,1 mm i 40% powyzej 1 maj 20% tworzywa muli- towo-oyrkonowo-korundowego o granulaoji 0-3 mm, w tym 40% o granulaoji ponizej 0,1 mm, 10% ogniotrwalej gliny surowej o granulacji 0,2 mm, w tym 4% w postaci gestwy* Z powyzszej masy formuje sie ksztaltki dla kadzi stalowniczych pod cisnieniem 70 MPa, a nastepnie suszy sie je do wllgotnosoi ponizej 0,5% i wypala sie w pleou tunelowym w temperaturze 1870 K« Zastrzezenie patentowe Sposób wytwarzania ogniotrwalych wyrobów do wylozenia obmurza kadzi stalowniozyoh z mas sypkich skladajacych sie z boksytu prazonego lub palonki wysokoglinowej, ognio¬ trwalej gliny surowej, w którym z masy formuje sie wyroby na prasach, nastepnie suszy i wypala, znamienny tym, ze w mieszadle przygotowuje sie mase sypka o wllgotnosoi 2 do 6% skladajaoa sie od 5 do 50% z tworzywa mulitowo—cyrkonówo-korundo- wego, topionego clektryoznie, o granulaoji ponizej 5 mm, korzystnie 3 mm z tym, ze oo najmniej 20% ziarn posiada granulacje ponizej 0,1 mm, a oo najmniej 30% zlarn granu¬ lacje powyzej 1 mm, 40 do 80% boksytu pralonego lub palonki wysokoglinowej, wzglednie zlomu z wyrobów wyeokoglinowych lub boksytowyoh, o granulaoji 0 do 3 mm lub 0 do 2 mm, w tym co najmniej 30% zlarn o granulacji ponizej 0,1 mm, 5 do 30% ogniotrwalej gliny surowej o granulaoji 0 do 2 mm, korzystnie w postaoi gestwy, 1 do 4% leplszoza korzystnie lugu posiarczynowego, nastepnie z masy formuje sie wyroby pod olsnieniem minimum 50 MPa, które po wysuszeniu do wllgotnosoi ponizej 1% wypala w .temperaturze powyzej 1720 K, korzystnie 1870 K* Pracownia Poligraficzna UP PRL. Naklad 100 egz.Cena 100zl PLThe subject of the invention is the production of refractory products for lining steel ladles, especially with large capacity, and steel ladles intended for operation in very difficult thermal and chemical conditions. consisting of 60 to 90% by weight of roasted bauxite or high-alumina, 10 to 30% by weight of refractory crude clay and 1 to 100% by weight of sulfite slurry, while bauxite products contain 70 to 80% of alumina, and high-aluminum 50 to 30% 90 # of alumina * This mass is formed, then dried and fired * The disadvantage of the products manufactured according to the invention is the service life limited to 15 to 30 tapping points * The essence of the method according to the invention is to add bauxite or high-carbon materials to the mass mullite of electrically fused zirconium-zirconium, constituting a mixture anine of technical aluminum oxide and zirconium silicate with the addition of low melting materials * These materials with porosity below 5 $ are crushed and then ground to granulation below 5 mm, preferably below 3 mm * Then, loose masses with a moisture content of 2 to 6 £ are prepared. which includes: kO up to £ 80 of roasted bauxite or high-alumina scrap or scrap from high-aluminum or bauxite products with granulation from 0 to 3 mm or 0 to 2 mm, including at least 30 # grains with granulation below 0f 1 mm, 5 to 5 <# mullite-zirconium-corundum material, electrically fused, granulation less than 5 mm, preferably 3 mm, with at least 205 * grains having a grain size of less than 0.1 mm, and at least 305 * grains of grain size greater than 1 mmf 5 to 30% of refractory raw clay with a granulation of 0 to 2 mm, preferably in the form of a dense, 1 to k% of binder, preferably of sulfite slurry * 2 128 700 The mass prepared in this way is formed into products under a glare of at least 50 MPa 1 after drying up to a moisture content below 1%, it burns out at a temperature of 1720 K, preferably at a temperature of 1870 K compressive strength over 35 MPa, open porosity - below 20% and high refractoriness under the oblazen - exceeded 1820 K * content of 75% alumina 0 granulaoji 0 to 3 mm * * including 40% below 0.1 mm? 40% of a metal-zirconium-corundum material, electrically fused, with a granule of 0-3 mm, including 30% of a granule of less than 0-1 mm? 20% of refractory raw clay of granulation 0-2 mm 1 with a normal refractoriness of 1980 K, including 6% in the form of dense * This mass is formed into a slew of shapes for the brickwork of steel ladles with the use of a metallurgical press under 60 MPa glare, and then dried to wllgotnosoi 0.5% 1 fired in a tunnel pleou at the temperature of 1870 K * Example II. In the rotor mixer, the following components are mixed at 5% humidification: 70% high alumina cuttings with 70% alumina content of 0-2 mm granules, including 45% below 0.1 mm and 40% above May 1, 20% mulch material towo-oirconium-corundum with granulaoji 0-3 mm, including 40% with granulaoji below 0.1 mm, 10% refractory raw clay with granulation 0.2 mm, including 4% in the form of gesture * The above mass is formed into shapes for steel ladles under a pressure of 70 MPa, then they are dried to a moisture content below 0.5% and burned in a tunnel pleou at a temperature of 1870 K «Patent claim A method of manufacturing refractory products for lining steel ladles from loose masses consisting of roasted bauxite or burner of high-aluminum, refractory raw clay, in which the mass is formed into products on presses, then dried and fired, characterized in that the agitator prepares a loose mass with a moisture content of 2 to 6% consisting of 5 to 50% of plastic mullite-circus new-alumina, fused clektroznie, with a grain size of less than 5 mm, preferably 3 mm, but at least 20% of the grains have a grain size of less than 0.1 mm, and at least 30% of granules above 1 mm, 40 to 80% of roasted bauxite or high-alumina, or scrap from high-aluminum or bauxite products, with a granule size of 0 to 3 mm or 0 to 2 mm, including at least 30% of limes with a granulation of less than 0.1 mm, 5 to 30% of refractory raw clay with granules of 0 to 2 mm, preferably in the form of dense, 1 to 4% of better viscosity, preferably of sulfite slurry, then the mass is formed into products under a glare of at least 50 MPa, which, after drying to a moisture content of less than 1%, burns at a temperature above 1720 K, preferably 1870 K * Printing studio of the PRL. Mintage 100 copies Price PLN 100 PL

Claims (1)

1. Zastrzezenie patentowe Sposób wytwarzania ogniotrwalych wyrobów do wylozenia obmurza kadzi stalowniozyoh z mas sypkich skladajacych sie z boksytu prazonego lub palonki wysokoglinowej, ognio¬ trwalej gliny surowej, w którym z masy formuje sie wyroby na prasach, nastepnie suszy i wypala, znamienny tym, ze w mieszadle przygotowuje sie mase sypka o wllgotnosoi 2 do 6% skladajaoa sie od 5 do 50% z tworzywa mulitowo—cyrkonówo-korundo- wego, topionego clektryoznie, o granulaoji ponizej 5 mm, korzystnie 3 mm z tym, ze oo najmniej 20% ziarn posiada granulacje ponizej 0,1 mm, a oo najmniej 30% zlarn granu¬ lacje powyzej 1 mm, 40 do 80% boksytu pralonego lub palonki wysokoglinowej, wzglednie zlomu z wyrobów wyeokoglinowych lub boksytowyoh, o granulaoji 0 do 3 mm lub 0 do 2 mm, w tym co najmniej 30% zlarn o granulacji ponizej 0,1 mm, 5 do 30% ogniotrwalej gliny surowej o granulaoji 0 do 2 mm, korzystnie w postaoi gestwy, 1 do 4% leplszoza korzystnie lugu posiarczynowego, nastepnie z masy formuje sie wyroby pod olsnieniem minimum 50 MPa, które po wysuszeniu do wllgotnosoi ponizej 1% wypala w .temperaturze powyzej 1720 K, korzystnie 1870 K* Pracownia Poligraficzna UP PRL. Naklad 100 egz. Cena 100zl PL1. Patent claim A method of manufacturing refractory products for lining steel-steel ladles from loose masses consisting of calcined bauxite or high-aluminum burner, fire-resistant raw clay, in which the mass is formed into products on presses, then dried and fired, characterized by that the agitator prepares a loose mass with a moisture content of 2 to 6%, it consists of 5 to 50% of a mullite-zirconium-corundum material, fused with clektryoznie, with a granule thickness below 5 mm, preferably 3 mm, with at least 20% of grains has a granulation of less than 0.1 mm, and at least 30% of coarse granulation of more than 1 mm, 40 to 80% of roasted bauxite or high-alumina, or of scrap from high-aluminum or bauxite products, with a granule size of 0 to 3 mm or 0 to 2 mm , including at least 30% of silt with a granulation of less than 0.1 mm, 5 to 30% of refractory crude clay with a granulation of 0 to 2 mm, preferably in the form of dense, 1 to 4% better more preferably of sulphite slurry, then form the mass that the products are glare at a minimum of 50 MPa, which after drying to a moisture content below 1%, fired at a temperature above 1720 K, preferably 1870 K * Pracownia Poligraficzna UP PRL. Mintage 100 copies. Price PLN 100
PL22339880A 1980-04-10 1980-04-10 Method of manufacturing refractories for steelmaking ladle lining PL128700B1 (en)

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PL128700B1 true PL128700B1 (en) 1984-02-29

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