DE961257C - Process for the production of sulfur dioxide or sulfuric acid and cement - Google Patents

Process for the production of sulfur dioxide or sulfuric acid and cement

Info

Publication number
DE961257C
DE961257C DEF15386A DEF0015386A DE961257C DE 961257 C DE961257 C DE 961257C DE F15386 A DEF15386 A DE F15386A DE F0015386 A DEF0015386 A DE F0015386A DE 961257 C DE961257 C DE 961257C
Authority
DE
Germany
Prior art keywords
cement
sulfuric acid
coke
sulfur dioxide
production
Prior art date
Legal status (The legal status 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 status listed.)
Expired
Application number
DEF15386A
Other languages
German (de)
Inventor
Dr Hans Kuehne
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bayer AG
Original Assignee
Bayer AG
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 Bayer AG filed Critical Bayer AG
Priority to DEF15386A priority Critical patent/DE961257C/en
Application granted granted Critical
Publication of DE961257C publication Critical patent/DE961257C/en
Expired legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01BNON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B17/00Sulfur; Compounds thereof
    • C01B17/48Sulfur dioxide; Sulfurous acid
    • C01B17/50Preparation of sulfur dioxide
    • C01B17/501Preparation of sulfur dioxide by reduction of sulfur compounds
    • C01B17/506Preparation of sulfur dioxide by reduction of sulfur compounds of calcium sulfates
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B7/00Hydraulic cements
    • C04B7/02Portland cement
    • C04B7/04Portland cement using raw materials containing gypsum, i.e. processes of the Mueller-Kuehne type

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)

Description

Verfahren zur Herstellung von Schwefeldioxyd bzw. Schwefelsäure und Zement Bei den als Gipsschwefelsäure-Zement-Verfahren bekannten Prozeß werden die verwendeten Rohstoffe Calciumsulfat, Koks und die tonerde-, etisenoxyd- und siliciumdioxydhaltigen Zuschläge aufs feinste gemahlen, wie es in der Zementindustrie allgemein üblüch und als notwendig erkannt ist. Diese Feinstmahlerei erfordert einen großen Kraftaufwand und diementsprechende Kosten. Hierbei bereitet der meist verwendete harte, schwer zur Feinheit zu mahlende Koks zusätzliche technische Schwierigkeiten und Kosten durch starken Materialverschleiß der Mahlvorrichtungen.Process for the production of sulfur dioxide or sulfuric acid and Cement In the process known as the gypsum sulfuric acid cement process, the The raw materials used are calcium sulphate, coke and those containing alumina, iron oxide and silicon dioxide Aggregates finely ground, as is common in the cement industry and is recognized as necessary. This fine grinding requires a lot of effort and the associated cost. The hard one that is most often used prepares it with difficulty coke to be ground to the fineness adds technical difficulties and costs due to heavy material wear and tear on the grinding devices.

Geigenstand der Erfindung ist ein Verfahren zur Herstellung von schwefliger Säure bzw. Schwefelsäure und Zement aus Caaciumsulfat, festen, kohlenstoffhaltigen Stoffen:, wie Koks, undi Zwschlägen von zur Zementbildung nötigen tone.rde-, eisenoxyd- und siliciumdioxydhaltigen Rohstoffen, welches dadurch gekennzeichnet ist, daß Calciu,msulf'at und Koks nur bis zur Grießform und die zur Ze mentbildung nötigen Zuschläge zweckmäßig fein gemahlen werden.The violin stand of the invention is a process for the production of sulphurous Acid or sulfuric acid and cement from calcium sulfate, solid, carbonaceous Substances: such as coke, and impacts of clay, earth, iron oxide and silicon dioxide-containing raw materials, which is characterized in that calcium sulfate and coke is only useful up to the form of semolina and the additives required for cement formation be finely ground.

Zur Ausführung des neuen Verfahrens wurden z. B. Calciumsulfat und Koks nur bis auf etwa z m;m Größe zerkleinert, mit den f'einstgemahlenen Zuschlägen gemirscht und im Drehofen auf etwa 1q.00° erhitzt. Es ergab sich überraschenderweise ein normaler, den Normen entsprechender Zementklinker und die der Reaktion entsprechende Menge Schweie.ldioxyd.To carry out the new process, for. B. calcium sulfate and Coke is only crushed to a size of about 2 m, with the finest ground aggregates minced and heated in a rotary kiln to about 1q.00 °. It turned out surprisingly a normal cement clinker that complies with the standards and the the Reaction corresponding amount of sulfur dioxide.

Die Reaktionen verlaufen beim Gipsschwefelsäureprozeß so, daß sich bei etwa goo° entsprechend der zugesetzten Koksmenge (1/z Mol C auf i Mol Ca s 04) aus dem vierten Teil des vorhandenen Calciumsulfats Calciumsulfid bildet. Dieses setzt sich bei Temperaturen von iioo bis i2oo° nach der Gleichung 3 C&S04+CaS=q. CaO+S02 mit dem restlichen Ca,lciumsulfat zu Kalk -und Schwefeldioxyd um. Bei kurz über iaoo° durchläuft das Gemenge einen teigigen Zustand, in dem auch grobkörniges Calciumsulfat und Calciumsulfid miteinander reagieren und das gebildete Calciumoxyd sich mit den Zuschlägen umsetzt, wie das im normalen Zemenaprozeß aus dem im Ofen aus Calciumcarbonat durch Kohlensäureabspaltung gebildete Calciu.moxyd. Da bei dem normalen. Zementprozeß der geschilderte teigige Zustand nicht durchlaufen wird, ist dort Feinstmahlung der gesamten, Rohstoffe nötig. Es ist klar, daß die Erkenntnis, daß man Gips und Kohle nicht feinsit zu mahlen braucht; einen großen technischen und wirtschaftlichen Vorteil bringt, denn, wie erwähnt, ist die Feinstmahlung langwierig und teuer, beim Koks auch noch durch starke Abnutzung der Mahlaggregate erschwert. Da Gips und Koks zusammen ungefähr go% dar Mischung bilden, spielt demgegenüber die Feinstmah.lung der Zuschläge keine große Rolle. Man kann nach dieser Erkenntnis z. B. sogar den billigen-, bei der Koksbereitung abfallenden Koksgrus verwenden, ohne ihn mahlen zu müssen. Die Erkenntnis erlaubt in Zukunft auch eine Verbilligung und Vereinfachung der Anlageaggregate für das Gipsschwefelsäure-Zement-Verfahren.The reactions take place in the gypsum-sulfuric acid process in such a way that at about goo ° corresponding to the amount of coke added (1 / z mole C to 1 mole Ca s 04) forms calcium sulfide from the fourth part of the calcium sulfate present. This settles at temperatures from 100 to 1200 ° according to the equation 3 C & S04 + CaS = q. CaO + S02 with the remaining calcium sulfate to calcium and sulfur dioxide. With short Over iaoo ° the mixture goes through a doughy state in which also coarse-grained Calcium sulfate and calcium sulfide react with each other and the calcium oxide formed is implemented with the surcharges, like that in the normal Zemena process from the oven Calcium oxide formed from calcium carbonate by splitting off carbonic acid. Since with that normal. Cement process the doughy state described is not passed through, fine grinding of all raw materials is necessary there. It is clear that the realization that there is no need to grind plaster of paris and charcoal; a great technical and brings economic advantage, because, as mentioned, fine grinding is tedious and expensive, in the case of coke also made more difficult by heavy wear and tear on the grinding units. Since plaster of paris and coke together make up about 100% of the mixture, this is a contradiction in terms the fine grinding of the aggregates does not play a major role. One can after this knowledge z. B. even use the cheap coke that falls off during coke preparation, without having to grind it. The knowledge also allows a cheaper price in the future and simplification of the plant units for the gypsum-sulfuric acid-cement process.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung von. Schwefeldioxyd bzw. Schwefelsäure und Zement aus Calciumsulfat, festen, kohlenstoffhaltigen Stoffen, wie Koks, und Zuschlägen von zur Zementbildung nötigen tonerde-, eisenoxyd- und siliciumdioxydhaltigen Rohstoffen, dadurch gekennzeichnet, daß Calciumsulfat und Koks nur bis zur Grießform und die zur Zementbildung nötigen Zuschläge zweckmäßig fein gemahlen werden. In Betracht gezogene Druckschriften: Österreichische Patentschrift Nr. 92 887. PATENT CLAIM: Process for the production of. Sulfur dioxide or sulfuric acid and cement from calcium sulphate, solid, carbonaceous substances such as coke, and additives of alumina, iron oxide and silicon dioxide-containing raw materials necessary for cement formation, characterized in that calcium sulfate and coke are only useful up to the form of grit and the additives necessary for cement formation be finely ground. Considered publications: Austrian patent specification No. 92 887.
DEF15386A 1954-08-05 1954-08-05 Process for the production of sulfur dioxide or sulfuric acid and cement Expired DE961257C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEF15386A DE961257C (en) 1954-08-05 1954-08-05 Process for the production of sulfur dioxide or sulfuric acid and cement

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEF15386A DE961257C (en) 1954-08-05 1954-08-05 Process for the production of sulfur dioxide or sulfuric acid and cement

Publications (1)

Publication Number Publication Date
DE961257C true DE961257C (en) 1957-04-04

Family

ID=7087873

Family Applications (1)

Application Number Title Priority Date Filing Date
DEF15386A Expired DE961257C (en) 1954-08-05 1954-08-05 Process for the production of sulfur dioxide or sulfuric acid and cement

Country Status (1)

Country Link
DE (1) DE961257C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4243763A1 (en) * 1992-12-23 1994-06-30 Kluger Karl Heinz Dr Raw powder mixt

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT92887B (en) * 1918-05-21 1923-05-25 Farbenfabriken Vorm Friedrich Process for the extraction of sulphurous acid and cement from gypsum.

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT92887B (en) * 1918-05-21 1923-05-25 Farbenfabriken Vorm Friedrich Process for the extraction of sulphurous acid and cement from gypsum.

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4243763A1 (en) * 1992-12-23 1994-06-30 Kluger Karl Heinz Dr Raw powder mixt

Similar Documents

Publication Publication Date Title
DE961257C (en) Process for the production of sulfur dioxide or sulfuric acid and cement
DE2461133B2 (en) Process for the production of a raw meal for the gypsum-sulfuric acid process
DEF0015386MA (en)
DE1671201A1 (en) Hydraulic binder compositions that expand as they harden
DE585625C (en) Process for preparing fine-grained zinc blende for the roasting process
US1688882A (en) Art of cement manufacture
DE694435C (en) Process for the simultaneous extraction of clay, sulfur dioxide and cement
CH98789A (en) Process for the preparation of sulphurous acid and hydraulic binders from gypsum.
DE810395C (en) Process for the production of lime fertilizers from moist or water-containing blast furnace slag or similar starting materials
DE432419C (en) Process for the production of white table salt from raw rock salt u. like
DE697221C (en) Process for the production of sulfur dioxide and Portland cement
DE1141575B (en) Process for the production of a sulphate-resistant cement using glassy slag
EP0454817B1 (en) Process for the production of cement clinker and sulphur dioxide recovery
DE849671C (en) Process for mixing fine-grained rock with bituminous binders with the addition of water
DE349346C (en) Process for the production of sulphurous acid from calcium sulphide
DE559926C (en) Process for the digestion of calcium carbonate-rich rock phosphates with simultaneous production of dicalcium phosphate
DE908183C (en) Dry steel molding compound
DE496958C (en) Process for the excitation of latent hydraulic binders
DE491350C (en) Process for the production of pure, white and finely divided barium or calcium sulfate
DE480214C (en) Extraction of sulfur from alkaline earth sulfates
DE414122C (en) Process for the production of a hydraulic binder from oil slate slag
DE448099C (en) Process for the simultaneous production of iron phosphide and molten cement
DE410233C (en) Process for the production of artificial building materials
DE700498C (en) Production of calcium sulphide containing calcium cyanamide suitable for thiourea production
DE1913244A1 (en) Portland cement production with sulphuric - acid recovery