PL77147B2 - - Google Patents

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Publication number
PL77147B2
PL77147B2 PL15397072A PL15397072A PL77147B2 PL 77147 B2 PL77147 B2 PL 77147B2 PL 15397072 A PL15397072 A PL 15397072A PL 15397072 A PL15397072 A PL 15397072A PL 77147 B2 PL77147 B2 PL 77147B2
Authority
PL
Poland
Prior art keywords
lime
milk
carbon
sulphates
quenched
Prior art date
Application number
PL15397072A
Other languages
Polish (pl)
Original Assignee
Instytut Przemyslu Wiazacychpo
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
Priority to BE795661D priority Critical patent/BE795661A/en
Application filed by Instytut Przemyslu Wiazacychpo filed Critical Instytut Przemyslu Wiazacychpo
Priority to PL15397072A priority patent/PL77147B2/pl
Priority to FR7307748A priority patent/FR2184591A1/en
Priority to NL7303200A priority patent/NL7303200A/xx
Priority to JP2791973A priority patent/JPS48102797A/ja
Priority to BR174073A priority patent/BR7301740D0/en
Priority to DE19732312213 priority patent/DE2312213A1/en
Publication of PL77147B2 publication Critical patent/PL77147B2/pl

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Classifications

    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01FCOMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
    • C01F11/00Compounds of calcium, strontium, or barium
    • C01F11/02Oxides or hydroxides
    • C01F11/04Oxides or hydroxides by thermal decomposition
    • C01F11/06Oxides or hydroxides by thermal decomposition of carbonates

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Inorganic Chemistry (AREA)
  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
  • Processing Of Solid Wastes (AREA)
  • Treatment Of Sludge (AREA)

Description

Pierwszenstwo: Zgloszenie ogloszono: 30.05.1973 Opis patentowy opublikowano: 10.09.1975 77147 KI. 80b,2/03 MKP C04b 1/06 C^YTL- i Urzedu Póle ' vv^qo Twórcy wynalazku: Wieslaw Kurdowski, Edmund Nowak, Jerzy Schroe¬ der, Józef Strzelski Uprawniony z patentu tymczasowego: Instytut Przemyslu Wiazacych Materialów Budowlanych, Opole (Polska) Sposób wytwarzania mleka wapiennego Przedmiotem wynalazku jest sposób wytwarza¬ nia mleka wapiennego z materialów, zwlaszcza z surowców mineralnych i/lub z odpadów prze¬ myslowych, których glównym skladnikiem chemi¬ cznym jest weglan wapnia, na przyklad z kredy odpadowej przy produkcji siarczanu amonu, zanie¬ czyszczony siarczanami, zwlaszcza siarczanem wa¬ pnia oraz ewentualnie zwiazkami fluoru, zwla¬ szcza fluorokrzemianem sodu lub kwasem fluoro¬ krzemowym.Znane sa sposoby wytwarzania mleka wapien¬ nego z materialów, zwlaszcza z surowców mine¬ ralnych i/lub z odpadów przemyslowych, których glównym skladnikiem chemicznym jest weglan wapmia, na przyklad kredy, polegajace na tym, ze rozdrobniony material w formie granul, szlamu, pylu wzglednie material kawalkowy wprowadza sie do pieca przemyslowego, zwlaszcza do pieca obrotowego, wzglednie szybowego i wypala sie w temperaturze od 800 do 1300°C, skladuje sie w zamknietych zbiornikach wapna lub na zam¬ knietych skladowiskach, aby wapno wypalone nie pochlonelo nie kontrolowanej ilosci wody, a nastepnie gasi sie, doprowadzajac do wapna palonego odpowiednia ilosc wody, w gaszalnikach róznego typu, w których woda laczy sie chemi¬ cznie z aktywnym tlenkiem wapnia na wodoro¬ tlenek wiapnia d wówczas otrzymuje sie tak zwane wapno sucho gaszone, czyli hydrat, ialfoo jezeli ilosc dodanej wody jest wieksza od tej, która 30 moze zwiazac aktywny tlenek wapnia, wodorotle¬ nek wapnia rozszlamowuje sie na produkt zwany mlekiem wapiennym.W niektórych znanych rozwiazaniach, jezeli ilosc aktywnego tlenku wapnia jest niewielka, wapno palone zaraz po gaszalniku, w którym zostaje wymieszane z odpowiednia iloscia wody, jest transportowane do dojirzewalników róznego typu, z mieszadlami lub bez mieszadel, w których za¬ chodzi powoli proces gaszenia wapna. Po uplywie kilku dni mozna z takiego wapna wytwarzac mleko wapienne przez rozszlamowanie w dodatkowej ilosci wody.Niedostatkiem tego znanego sposobu jest fakt, ze w przypadku kiedy material zanieczyszczony jest siarczanami, zwlaszcza siarczanem wapnia w ilosci powyzej 2 procent, wapno wypalone zna¬ nym sposobem gasi sie bardzo powoli, ponadto po¬ wstaly wodorotlenek wapnia natychmiast krystali¬ zuje i sedymentuje na dnie zbiorników, wobec cze¬ go nie otrzymuje sie szlamu, a to wyklucza mozli¬ wosc stosowania tego znanego sposobu przy wy¬ twarzaniu mleka wapiennego, zwlaszcza z odpa¬ dów przemyslowych.'Niedostatek ten pogarsza jeszcze obecnosc na¬ wet nieznacznych ilosci innych zanieczyszczen, zwlaszcza zwiazków fluoru, zwiekszajacych za¬ wartosc substancji inertnej w materiale opuszcza¬ jacym pipc. 77 1473 Celem wynalazku jest unikniecie tego niedo¬ statku i umozliwienie wytwarzania mleka wapien¬ nego z materialów, zwlaszcza z surowców mine¬ ralnych i/lub z odpadów przemyslowych, których glównym skladnikiem chemicznym jest weglan wapnia, :na przyklad z kredy odpadowej przy pro¬ dukcji siarczanu amonu, zanieczyszonych siarcza¬ nami, zwlaszcza siarczanem wapnia oraz ewentu¬ alnie zwiazkami fluoru.Zadanie techniczne, wynikajace z postawionego celu wynalazku polega na tym, ze podczas wypalu intensyfikuje sie rozklad termiczny siarczanów, zwlaszcza siarczanu wapnia oraz ewentualnie zwiazków fluoru, zwlaszcza fluorokrzemianu sodu i/lub kwasu fluorokrzemowego, co zmniejsza w zasadniczy sposób ilosc siarczanów wapnia oraz siarczków wapnia ii/lub zelaza powstajacych ewen¬ tualnie w strefie - wypalu, umozliwia przejscie szkodliwych zwiazków fluoru w nieszkodliwy fluo¬ rek wapnia w materiale opuszczajacym piec, a takze na tym, ze gaszenie wapna palonego od¬ bywa sie w mlynie kulowym T zwlaszcza rurowym albo wibracyjnym, gdzie granule materialu w trakcie gaszenia sa rozdrabniane mielnikami.Sposób wedlug wynalazku wytwarzania mleka wapiennego z materialów, zwlaszcza z surowców mineralnych i/lub odpadów przemyslowych, któ¬ rych glównym skladnikiem chemicznym jest we¬ glan wapnia, na przyklad z kredy odpadowej przy produkcji siarczanu amonu, zanieczyszczonych siarczanami, zwlaszcza siarczanem wapnia oraz ewentualnie zwiazkami fluoru, zwlaszcza fluoro¬ krzemianem sodu lub kwasem fluorokrzemowym, polega na tym, ze przygotowujac wsad piecowy w formie granul, szlamu lub pylu, do materialu podstawowego dodaje sie J_jnoizprowadza w nim równomiernie material zawierajacy wegiel, zwla¬ szcza ^wegiel pierwiastkowy, na przyklad w po¬ staci koksu, korzystnie w ilosci 1 do 2,5 mola C na 1 mol siarczanów w przeliczeniu na CaSi04, ze te mieszanine wypala sie w piecu obrotowym w temperaturze od 800 do 1300°iC, a nastepnie gasi sie i rozszlamowuje na mleko wapienne, mielac material w mlynie kulowym, zwlaszcza rurowym lub wibracyjnym.Jalk wykaizaly próby, dobre wyniki daje dodat¬ kowo gwaltowne chlodzenie materialu opuszcza¬ jacego strefe wypalu do temperatury olkolo 700°C, na przyklad przy pomocy strumienia wody.Sposób wedlug wynalazku jest przedstawiony w przykladzie wykonania.Przyklad. Uzyto kredy o skladzie chemicznym: Cena 147 4 I II CaO03 CaS04-2HzO SiC2 (NH,)2S04 PsA F R2O3 82 % 10 °/o 3 % 3 0,5°/o 1 % 0,5% 100,0% 83 % 3 % 4 % 6 % 0,<8% 1,2% 2 % 100,0% która zmieszano 75% C w ilosci 2 do 3% ii wypalono w piecu obrotowym w temperaturze 1150°C. Jako material opuszczajacy piec otrzymano wapno palone, za- 15 wierajaoe 68 do 75% aktywnego tlenku wapnia, z czego wynika, ze stopien rozkladu siarczanów przekroczyl 90%. Otrzymane wapno palone ga¬ silo sie w czasie nie dluzszym niz 15 minut, a za¬ wartosc tlenku wapnia w otrzymanym mleku 20 wapiennym wynosila 190 do 230 g na 1 litr.Zaleta sposobu wedlug wynalazku wytwarzania mleka wapiennego z materialów zanieczyszczonych siarczanami, a takze ewentualnie zwiazkami flu¬ oru, jest fakt, ze calosc wypalonego materialu 25 staje sie w trakcie mielenia aktywna i gasi sie, a nastepnie rozszlamowuje sie mleko wapienne w jednym urzadzeniu. 30 PL PLPriority: Application announced: May 30, 1973 Patent description was published: September 10, 1975 77147 KI. 80b, 2/03 MKP C04b 1/06 C ^ YTL- i Urzedu Pól 'vv ^ qo Inventors: Wieslaw Kurdowski, Edmund Nowak, Jerzy Schroeder, Józef Strzelski Authorized by a temporary patent: Institute of Binding Building Materials Industry, Opole ( Poland) The method of producing milk of lime. The subject of the invention is a method of producing milk of lime from materials, in particular from mineral raw materials and / or from industrial waste, the main chemical component of which is calcium carbonate, for example from waste chalk in the production of ammonium sulphate. contaminated with sulphates, especially limestone sulphate and possibly with fluorine compounds, especially sodium fluorosilicate or fluoro-silicic acid. There are known methods of producing lime milk from materials, especially from mineral raw materials and / or from industrial waste. whose main chemical constituent is calcium carbonate, for example chalk, consisting in the fact that a particulate material in the form of granules, sludge, dust or The piece of algae is introduced into an industrial kiln, especially a rotary kiln, or a shaft kiln, and is burnt at a temperature of 800 to 1300 ° C, it is stored in closed lime tanks or in closed landfills so that the calcined lime does not absorb an uncontrolled amount of water, and then it is quenched, giving the quicklime an appropriate amount of water, in fire extinguishers of various types, in which the water chemically combines with the active calcium oxide to calcium hydroxide, then the so-called dry slaked lime is obtained, i.e. hydrate, andalphoo if the amount of water added is greater than that which can bind the active calcium oxide, the calcium hydroxide breaks down into a product called milk of lime. In some known solutions, if the amount of active calcium oxide is low, the lime is burned immediately after the fire extinguisher in which it remains mixed with an appropriate amount of water, it is transported to various types of milkers, with or without agitators, in which the lime slaking process takes place slowly. After a few days, it is possible to make milk of lime from such lime by deburring in an additional amount of water. The disadvantage of this known method is the fact that when the material is contaminated with sulphates, especially calcium sulphate in an amount above 2%, the lime burned out by a known method extinguishes very slowly, moreover, the formed calcium hydroxide immediately crystallizes and sedimented at the bottom of the tanks, so that no sludge is obtained, and this excludes the possibility of using this known method in the production of milk of lime, especially from This deficiency is aggravated by the presence of even slight amounts of other impurities, especially fluorine compounds, increasing the content of inert matter in the material leaving the pipeline. 77 1473 The object of the invention is to avoid this shortage and to enable the production of milk of lime from materials, in particular from mineral raw materials and / or from industrial waste, the main chemical component of which is calcium carbonate, e.g. the production of ammonium sulphate, contaminated with sulphates, especially calcium sulphate and possibly with fluorine compounds. The technical task resulting from the aim of the invention is that during firing the thermal decomposition of sulphates, especially calcium sulphate and possibly fluorine compounds, especially fluorosilicate is intensified. sodium and / or fluosilicic acid, which significantly reduces the amount of calcium sulphates and calcium sulphides and / or iron possibly formed in the firing zone, allows the conversion of harmful fluorine compounds into harmless calcium fluoride in the material leaving the furnace, as well as on the fact that the slaking of the quicklime takes place in a ball mill T. A tubular or vibratory joint, where the granules of the material are crushed with grinding media during the extinguishing process. A method according to the invention of producing milk of lime from materials, especially mineral raw materials and / or industrial waste, the main chemical component of which is calcium carbonate, for example chalk. waste in the production of ammonium sulphate, contaminated with sulphates, in particular with calcium sulphate and possibly with fluorine compounds, especially sodium fluosilicate or fluosilicic acid, consists in the fact that when preparing the furnace charge in the form of granules, sludge or dust, Jn is added to the base material and introduced in it uniformly carbonaceous material, in particular elemental carbon, for example in the form of coke, preferably in the amount of 1 to 2.5 moles C per mole of sulfate, based on CaSO 4, that this mixture burns off in a rotary kiln at a temperature of 800 to 1300 ° iC, then quenching and breaking into milk of lime, grinding the material in a mill Jalk has been shown by tests, good results are additionally given by the rapid cooling of the material leaving the firing zone to a temperature of approximately 700 ° C, for example with a jet of water. The method according to the invention is shown in the example of embodiment. Chemical composition of chalk was used: Price 147 4 I II CaO03 CaS04-2HzO SiC2 (NH,) 2SO4 PsA F R2O3 82% 10 ° / 3% 3 0.5 ° / 1% 0.5% 100.0% 83 % 3% 4% 6% 0, <8% 1.2% 2% 100.0% which was mixed with 75% C in an amount of 2 to 3% and fired in a rotary kiln at 1150 ° C. Quicklime was obtained as the material exiting the kiln, containing 68 to 75% of active calcium oxide, resulting in a degree of sulfate decomposition in excess of 90%. The quicklime obtained was throttled for no more than 15 minutes, and the calcium oxide content of the milk of lime obtained was 190 to 230 g per liter. The advantage of the method according to the invention of producing milk of lime from materials contaminated with sulphates, and possibly also fluoride compounds is the fact that all of the fired material 25 becomes active during grinding and extinguishes, and then the milk of lime is broken down in one machine. 30 PL PL

Claims (3)

1. Zastrzezenia patentowe 1. Sposób wytwarzania mleka wapiennego z ma¬ terialów, zawierajacych weglan wapnia, zanieczy¬ szczonych siarczanami, a takze ewentualnie zwiaz¬ kami fluoru, polegajacych na tym, ze material 35 w formie granul, szlamu lub pylu wprowadza sie do pieca przemyslowego, zwlaszcza pieca obroto¬ wego i wypala sie w temperaturze 800 do 1300°C, a nastepnie gasi i rozszlamowuje na mleko wa¬ pienne, znamienny tym, ze przygotowujac wsad 40 piecowy, do materialu podstawowego dodaje sie i rozprowadza w _nirn__jptoMnqn^ zawierajacy wegiel, zwlaszcza wegiel pierwiastko¬ wy, na przyklad w postaci koksu, a nastepnie ca¬ losc wypalonego materialu gasi sie i rozszlamo- 45 wuje na mleko wapienne, mielac material w trak¬ cie gaszenia w znanym mlynie.1. Claims 1. Method for the production of milk of lime from materials containing calcium carbonate, contaminated with sulphates and possibly also with fluorine compounds, in which the material in the form of granules, sludge or dust is introduced into a furnace industrial, especially rotary kiln, and is fired at a temperature of 800 to 1300 ° C, then quenched and smeared into milk, characterized in that when preparing a 40-kiln batch, the base material is added to the base material and spread in a molten carbon containing carbon , in particular elemental carbon, for example in the form of coke, and then all of the burnt material is quenched and broken into milk of lime by grinding the material while slaking in a conventional mill. 2. Sposób wedlug zastrz. 1, znamienny tym, ze dodatek wegla wynosi 1 do 2,5 mola C na 1 mol siarczanów w przeliczeniu na CaS04. 502. The method according to claim The process of claim 1, wherein the carbon additive is 1 to 2.5 moles of C per mole of sulfate, expressed as CaSO4. 50 3. Sposób wedlug zastrz. 1 albo 2, znamienny tym, ze material opuszczajacy strefe wypalu do¬ datkowo chlodzi sie gwaltownie do temperatury okolo '700oC, na przyklad strumieniem wody. 10 zl RZG — 832/75 125 egz. A4 PL PL3. The method according to p. The method of claim 1 or 2, characterized in that the material leaving the firing zone is additionally cooled rapidly to a temperature of about 700 ° C, for example by a jet of water. 10 zl RZG - 832/75 125 copies A4 PL PL
PL15397072A 1972-03-10 1972-03-10 PL77147B2 (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
BE795661D BE795661A (en) 1972-03-10 PROCESS FOR PREPARING MILK OF LIME, AND PRODUCT OBTAINED
PL15397072A PL77147B2 (en) 1972-03-10 1972-03-10
FR7307748A FR2184591A1 (en) 1972-03-10 1973-03-05 Calcium hydroxide prepn - by calcining raw materials /industrial waste with carbon before slaking
NL7303200A NL7303200A (en) 1972-03-10 1973-03-07
JP2791973A JPS48102797A (en) 1972-03-10 1973-03-09
BR174073A BR7301740D0 (en) 1972-03-10 1973-03-09 A METHOD OF PRODUCTION OF LIME MILK
DE19732312213 DE2312213A1 (en) 1972-03-10 1973-03-12 METHOD FOR MANUFACTURING LIME MILK

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PL15397072A PL77147B2 (en) 1972-03-10 1972-03-10

Publications (1)

Publication Number Publication Date
PL77147B2 true PL77147B2 (en) 1975-04-30

Family

ID=19957718

Family Applications (1)

Application Number Title Priority Date Filing Date
PL15397072A PL77147B2 (en) 1972-03-10 1972-03-10

Country Status (7)

Country Link
JP (1) JPS48102797A (en)
BE (1) BE795661A (en)
BR (1) BR7301740D0 (en)
DE (1) DE2312213A1 (en)
FR (1) FR2184591A1 (en)
NL (1) NL7303200A (en)
PL (1) PL77147B2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19603449C2 (en) * 1996-01-31 1998-03-19 Papiertechnische Stiftung Process for the production of calcium carbonate from calcium-containing combustion residues of residues from paper production

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB764537A (en) * 1953-03-28 1956-12-28 Smidth & Co As F L Improvements relating to the burning of materials containing sulphates
DE1108603B (en) * 1960-04-22 1961-06-08 Alsen Sche Portland Cement Fab Process for the production of a low-sulfur quicklime in the wet rotary kiln

Also Published As

Publication number Publication date
JPS48102797A (en) 1973-12-24
DE2312213A1 (en) 1973-09-20
BE795661A (en) 1973-06-18
NL7303200A (en) 1973-09-12
BR7301740D0 (en) 1974-07-25
FR2184591A1 (en) 1973-12-28
FR2184591B1 (en) 1976-04-09

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