GB1476963A - Production of calcined lime - Google Patents

Production of calcined lime

Info

Publication number
GB1476963A
GB1476963A GB2431374A GB2431374A GB1476963A GB 1476963 A GB1476963 A GB 1476963A GB 2431374 A GB2431374 A GB 2431374A GB 2431374 A GB2431374 A GB 2431374A GB 1476963 A GB1476963 A GB 1476963A
Authority
GB
United Kingdom
Prior art keywords
chamber
starting material
calcium oxide
production
stoichiometric
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
GB2431374A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB2431374A priority Critical patent/GB1476963A/en
Publication of GB1476963A publication Critical patent/GB1476963A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
    • C01F11/00—Compounds of calcium, strontium, or barium
    • C01F11/02—Oxides or hydroxides
    • C01F11/04—Oxides or hydroxides by thermal decomposition
    • C01F11/06—Oxides or hydroxides by thermal decomposition of carbonates
    • 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
    • C04B2/00—Lime, magnesia or dolomite
    • C04B2/10—Preheating, burning calcining or cooling
    • C04B2/12—Preheating, burning calcining or cooling in shaft or vertical furnaces
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00—Technologies relating to chemical industry
    • Y02P20/10—Process efficiency
    • Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines

Landscapes

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

Abstract

1476963 Calcium oxide production F SCHOPPE 31 May 1974 24313/74 Heading ClA A process for the continuous production of particulate surface-active, calcium oxide from starting material which comprises calcium carbonate and which is in finely ground form or in the form of a sludge or other fluid-like state, comprises calcination of said calcium carbonate in the presence of preheated air and fuel, wherein the material is dispersed in a state of suspension in a chamber in an upwardly directed gas flow, the ratio of free oxygen to fuel being between 1À2 and 2À5 with respect to the stoichiometric, at least a substantial proportion of the particles of starting material being heated to calcining temperature at a rate of more than 400‹ C. per second and the calcium oxide produced thereby being drawn off from the upper end of the chamber together with the hot gas flow after a residence time in the chamber of less than one second. The starting material is preferably preheated, at a temperature at which it will react, to obtain a heated, particulate conveyable dry material. The starting material may be blown into the chamber using process waste. Air is introduced into the calcining chamber preferably at 1000- 1400‹ C. and the ratio of free O 2 present is preferably between 1À6 to 2À0 with respect to the stoichiometric.
GB2431374A 1974-05-31 1974-05-31 Production of calcined lime Expired GB1476963A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2431374A GB1476963A (en) 1974-05-31 1974-05-31 Production of calcined lime

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2431374A GB1476963A (en) 1974-05-31 1974-05-31 Production of calcined lime

Publications (1)

Publication Number Publication Date
GB1476963A true GB1476963A (en) 1977-06-16

Family

ID=10209736

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2431374A Expired GB1476963A (en) 1974-05-31 1974-05-31 Production of calcined lime

Country Status (1)

Country Link
GB (1) GB1476963A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19739806A1 (en) * 1997-09-10 1999-03-11 Siemens Ag Input circuit with controllable switching threshold
NL1005746C2 (en) * 1996-04-12 1999-12-03 Pfeifer & Langen Process for the preparation of calcium oxide from precipitated calcium carbonate and applications.
GB2358394A (en) * 2001-01-12 2001-07-25 David Linsay Dodd Treatment of sugar lime; growing mushrooms
CN102730731A (en) * 2012-07-24 2012-10-17 广西大学 Lime powder production equipment taking bagasse as fuel

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1005746C2 (en) * 1996-04-12 1999-12-03 Pfeifer & Langen Process for the preparation of calcium oxide from precipitated calcium carbonate and applications.
DE19739806A1 (en) * 1997-09-10 1999-03-11 Siemens Ag Input circuit with controllable switching threshold
GB2358394A (en) * 2001-01-12 2001-07-25 David Linsay Dodd Treatment of sugar lime; growing mushrooms
GB2358394B (en) * 2001-01-12 2002-01-30 David Lindsay Dodd Method of growing mushrooms
CN102730731A (en) * 2012-07-24 2012-10-17 广西大学 Lime powder production equipment taking bagasse as fuel

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee