PL117915B3 - Process for manufacturing aluminium oxide from slagso shlaka - Google Patents

Process for manufacturing aluminium oxide from slagso shlaka Download PDF

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Publication number
PL117915B3
PL117915B3 PL19889477A PL19889477A PL117915B3 PL 117915 B3 PL117915 B3 PL 117915B3 PL 19889477 A PL19889477 A PL 19889477A PL 19889477 A PL19889477 A PL 19889477A PL 117915 B3 PL117915 B3 PL 117915B3
Authority
PL
Poland
Prior art keywords
slagso
shlaka
aluminium oxide
leached
manufacturing aluminium
Prior art date
Application number
PL19889477A
Other languages
Polish (pl)
Other versions
PL198894A1 (en
Inventor
Jerzy Grzymek
Anna Derdacka
Zofia Konik
Bronislaw Werynski
Original Assignee
Akad Gorniczo Hutnicza
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Akad Gorniczo Hutnicza filed Critical Akad Gorniczo Hutnicza
Priority to PL19889477A priority Critical patent/PL117915B3/en
Priority to HU78GO1392A priority patent/HU179977B/en
Priority to FR7804580A priority patent/FR2381827A1/en
Priority to ES467129A priority patent/ES467129A1/en
Priority to GB6613/78A priority patent/GB1596603A/en
Priority to US05/880,004 priority patent/US4149898A/en
Priority to BR7801063A priority patent/BR7801063A/en
Priority to CA297,477A priority patent/CA1100284A/en
Priority to AR27118778A priority patent/AR218477A1/en
Priority to DE2807615A priority patent/DE2807615C3/en
Publication of PL198894A1 publication Critical patent/PL198894A1/en
Publication of PL117915B3 publication Critical patent/PL117915B3/en

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Description

Przedmiotem wynalazku jest sposób otrzymywa¬ nia tlenku glinu z zuzli hutniczych, stanowiacy ulepszenie sposobu wedlug patentu nr 113496.Znany sposób otrzymywania tlenku glinu z zu¬ zli hutniczych wedlug patentu nr 113496 polega na tym, ze stopiony zuzel hutniczy poddaje sie wolnemu chlodzeniu w zakresie temperatur * po¬ nizej 700 °C do temperatury otoczenia, przy rów¬ noczesnym zastosowaniu ultradzwieków lub rezo¬ nansowej wibracji o wysokiej czestotliwosci. Na¬ stepnie z powstalej wysoko-temperaturowej od¬ miany 12CaO : 7AhOa luguje sie tlenek glinu wod¬ nym roztworem sody. W znanym sposobie otrzy¬ mywania tlenku glinu luguje sie wodnym roztwo¬ rem sodu w temperaturze 60 °C — 70 °C.Celem wynalazku jest zwiekszenie odzysku tlen¬ ku glinu z zuzli hutniczych.Istota wynalazku polega na tym, ze z powstalej w wyniku obróbki zuzla wysokotemperaturowej odmiany polimorficznej 12CaO: 7AI2O3 luguje sie tlenek glinu wodnym roztworem sody w tempera¬ turze od 55—20 °C.Zastosowanie nizszych temperatur podczas lugo¬ wania powoduje zmniejszenie strat tlenku glino¬ wego do ponizej 5l°/o, wynikajacych ze zmniejsze¬ nia zanieczyszczenia roztworu krzemianami, pod¬ czas gdy poprzednio straty wynosily okolo 9%.W wyniku zastosowania nizszych temperatur lu- 10 15 25 30 gowania zwieksza sie wydajnosc lugowania AhOa o 5%, to jest do 80—85% wagowych.Ponadto wyeliminowuje sie stosowane podgrze¬ wanie plynów przed I i II stopniem ekstrakcji.Ilosc ciepla potrzebna na podgrzewanie tych plynów stanowi w stosunku do ogólnego zuzycia ciepla okolo 25l°/o. W zwiazku z tym, przez zasto¬ sowanie tego sposobu obniza sie zuzycie ciepla o okolo 25%.Przyklad: Stopiony zuzel hutniczy o skladzie chemicznym: Si02 — 13,50%, Fe20s — 1,60%, AI2O3 — 29,50%, CaO — 52,30%, MgO — 1,10%, Ti02 — 1,60%, SO3 — 0,04%.Chlodzi sie wolno od temperatury 700 °C do tem¬ peratury otoczenia, przy czym w temperaturze 600 °C poddaje sie dzialaniu ultradzwieków o cze¬ stotliwosci 20 kHz, w wyniku czego zuzel w 1001% wagowych samorzutnie rozpada sie na drobny pyl o srednim wymiarze ziaren 30 nm, zawierajacy krystaliczna, wysokotemperaturowa, polimorficzna odmiane 12CaO : 7AI2O3.Tlenek-glinowy, zawarty w glinianie wapniowym 12CaO : AhOs luguje sie wodnym roztworem sody w temperaturze 30 °C, pfzy czym tlenek zostaje wylugowany w 85% wagowych. W czasie lugowa¬ nia tlenek glinowy przechodzi do roztworu, z któ¬ rego na drodze dalszej obróbki uzyskuje sie tlenek glinowy. 117 9153 117 915 4 Pozostalosc po lugowaniu uzupelnia sie piaskiem kwarcowym, wypalkami pirytowymi i wypala sie w piecu obrotowym na klinkier portlandzki, a na¬ stepnie miele sie z dodatkiem gipsu na cement.Zastrzezenie patentowe Sposób otrzymywania tlenku glinu z zuzli hut¬ niczych polegajacy na tym, ze stopiony zuzel hut¬ niczy poddaje sie wolnemu chlodzeniu od tempe¬ ratury 700 °C do temperatury otoczenia, poddajac go równoczesnie dzialaniu ultradzwieków lub re¬ zonansowym wibracjom o wysokiej czestotliwosci, a nastepnie luguje sie wodnym roztworem sody wedlug patentu nr 113496, znamienny tym, ze lu¬ guje sie wodnym roztworem sody w zakresie tem¬ peratur 55 °C do 20 °C. 5 DN-8 z. 1730/82 Cena 100 zl PLThe subject of the invention is a method of obtaining alumina from metallurgical slags, which is an improvement of the method according to the patent No. 113496. The known method of obtaining alumina from metallurgical slags, according to the patent No. 113496, consists in the fact that the molten metallurgical slag is slowly cooled in the temperature range. * below 700 ° C to ambient temperature, with simultaneous use of ultrasound or high frequency resonant vibration. The aluminum oxide is then leached from the resulting high-temperature 12CaO: 7AhOa form with an aqueous soda solution. In the known method of obtaining alumina, it is leached with an aqueous sodium solution at a temperature of 60 ° C - 70 ° C. The aim of the invention is to increase the recovery of alumina from metallurgical waste. The essence of the invention consists in the fact that The low temperature polymorph 12CaO: 7AI2O3 is leached with an aqueous solution of soda at a temperature of 55-20 ° C. The use of lower temperatures during ligation reduces the loss of alumina to less than 5%, resulting from the reduction of reduces the silicate contamination of the solution, whereas previously losses were around 9%. The use of lower leaching temperatures increases the AhOa leaching efficiency by 5%, that is, to 80-85% by weight. heating the liquids before the 1st and 2nd stage of extraction. The amount of heat needed for heating these liquids in relation to the total heat consumption is about 25%. Therefore, by using this method, the heat consumption is reduced by about 25%. Example: Molten metallurgical composition: SiO2 - 13.50%, Fe2Os - 1.60%, Al2O3 - 29.50%, CaO - 52.30%, MgO - 1.10%, TiO2 - 1.60%, SO3 - 0.04%. It is cooled slowly from 700 ° C to the ambient temperature, and is subjected to ultrasound with a frequency of 20 kHz, as a result of which 1001% of its weight spontaneously decomposes into fine dust with an average grain size of 30 nm, containing a crystalline, high-temperature, polymorphic modification of 12CaO: 7AI2O3. 12CaO: AhOs is leached with an aqueous soda solution at 30 ° C, whereupon the oxide is leached in 85% by weight. During the leaching process, the alumina goes into solution, from which alumina is obtained by further treatment. 117 9153 117 915 4 The residue after leaching is supplemented with quartz sand, pyrite burns and burned in a rotary kiln to form Portland clinker, and then grinded with the addition of gypsum for cement. Patent disclaimer The method of obtaining alumina from metallurgical slags. in that the molten metallurgical slag is subjected to slow cooling from 700 ° C to ambient temperature, subjecting it simultaneously to the action of ultrasounds or resonant vibrations of high frequency, and then leaching with an aqueous solution of soda according to patent No. 113496, characterized by it is loosened with an aqueous soda solution in the temperature range of 55 ° C to 20 ° C. 5 DN-8 z. 1730/82 Price PLN 100 PL

Claims (1)

1. Zastrzezenie patentowe Sposób otrzymywania tlenku glinu z zuzli hut¬ niczych polegajacy na tym, ze stopiony zuzel hut¬ niczy poddaje sie wolnemu chlodzeniu od tempe¬ ratury 700 °C do temperatury otoczenia, poddajac go równoczesnie dzialaniu ultradzwieków lub re¬ zonansowym wibracjom o wysokiej czestotliwosci, a nastepnie luguje sie wodnym roztworem sody wedlug patentu nr 113496, znamienny tym, ze lu¬ guje sie wodnym roztworem sody w zakresie tem¬ peratur 55 °C do 20 °C. 5 DN-8 z. 1730/82 Cena 100 zl PL1. Patent claim A method of obtaining alumina from metallurgical waste whereby molten metallurgical slurry is slowly cooled from 700 ° C to ambient temperature, simultaneously subjecting it to ultrasound or high resonant vibrations. frequency, and then leached with an aqueous soda solution according to Patent No. 113496, characterized in that it is leached with an aqueous soda solution in the temperature range of 55 ° C to 20 ° C. 5 DN-8 z. 1730/82 Price PLN 100 PL
PL19889477A 1977-02-23 1977-06-14 Process for manufacturing aluminium oxide from slagso shlaka PL117915B3 (en)

Priority Applications (10)

Application Number Priority Date Filing Date Title
PL19889477A PL117915B3 (en) 1977-06-14 1977-06-14 Process for manufacturing aluminium oxide from slagso shlaka
HU78GO1392A HU179977B (en) 1977-02-23 1978-02-16 Process for preparing aluminium oxide
FR7804580A FR2381827A1 (en) 1977-02-23 1978-02-17 ALUMINUM OXIDE PRODUCTION PROCESS
ES467129A ES467129A1 (en) 1977-02-23 1978-02-20 Method for obtaining aluminum oxide
GB6613/78A GB1596603A (en) 1977-02-23 1978-02-20 Method for obtaining aluminium oxide
US05/880,004 US4149898A (en) 1977-02-23 1978-02-21 Method for obtaining aluminum oxide
BR7801063A BR7801063A (en) 1977-02-23 1978-02-22 PROCESS TO OBTAIN ALUMINUM OXIDE
CA297,477A CA1100284A (en) 1977-02-23 1978-02-22 Method for obtaining aluminium oxide
AR27118778A AR218477A1 (en) 1977-02-23 1978-02-22 METHOD TO PRODUCE ALUMINUM OXIDE FROM METALURGIC SLAG RICH IN ALUMINA
DE2807615A DE2807615C3 (en) 1977-02-23 1978-02-22 Process for the production of alumina

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PL19889477A PL117915B3 (en) 1977-06-14 1977-06-14 Process for manufacturing aluminium oxide from slagso shlaka

Publications (2)

Publication Number Publication Date
PL198894A1 PL198894A1 (en) 1979-01-15
PL117915B3 true PL117915B3 (en) 1981-09-30

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PL19889477A PL117915B3 (en) 1977-02-23 1977-06-14 Process for manufacturing aluminium oxide from slagso shlaka

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PL198894A1 (en) 1979-01-15

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Effective date: 20090222