GB375950A - Process for performing endothermic reactions in blast apparatus - Google Patents

Process for performing endothermic reactions in blast apparatus

Info

Publication number
GB375950A
GB375950A GB14710/31A GB1471031A GB375950A GB 375950 A GB375950 A GB 375950A GB 14710/31 A GB14710/31 A GB 14710/31A GB 1471031 A GB1471031 A GB 1471031A GB 375950 A GB375950 A GB 375950A
Authority
GB
United Kingdom
Prior art keywords
charge
fuel
sulphate
substances
given
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
GB14710/31A
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.)
GEA Group AG
Original Assignee
Metallgesellschaft 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 Metallgesellschaft AG filed Critical Metallgesellschaft AG
Publication of GB375950A publication Critical patent/GB375950A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L3/00—Measuring torque, work, mechanical power, or mechanical efficiency, in general
    • G01L3/02—Rotary-transmission dynamometers
    • G01L3/04—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft
    • G01L3/08—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft involving optical means for indicating
    • 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
    • C04B11/00—Calcium sulfate cements
    • C04B11/02—Methods and apparatus for dehydrating gypsum
    • C04B11/028—Devices therefor characterised by the type of calcining devices used therefor or by the type of hemihydrate obtained
    • 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
    • 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
    • C04B7/00—Hydraulic cements
    • C04B7/36—Manufacture of hydraulic cements in general
    • C04B7/43—Heat treatment, e.g. precalcining, burning, melting; Cooling

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Thermal Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Solid Fuels And Fuel-Associated Substances (AREA)

Abstract

Relates to processes for the performance of endothermic reactions in blast-roasting apparatus, e.g. of the Dwight-Lloyd type, and consists in lowering the proportion in the charge of substances which absorb heat during decomposition, but which do not react with the fuel of the charge, by the addition of inert substances, such as sinter returns, to such a degree that the endothermic reaction, and, if desired, complete sintering can be carried to completion by a given fuel content in the charge. The process is applicable for cement making, the burning of limestone, dolomite, magnesite, gypsum, &c., for the decomposition of chlorides and sulphates, e.g. ferric sulphate, zinc sulphate, lead sulphate, for reduction purposes &c. An example of a charge for Portland cement comprises 25 kg. of clay, 75 kg. of calcium carbonate, 100-120 kg. of sinter returns and sufficient coke breeze or like fuel to give 60-70 thousand calories. An example of a charge for decomposing a sulphate comprises 25 kg. of lead sulphate, 75 kg. of inert material (purple ore, sinter returns or the like) and fuel (e.g. coke breeze or pyrites) to yield 35000 calories. Other examples are given.ALSO:Relates to processes for the performance of endothermic reactions in blast-roasting apparatus, e.g. of the Dwight-Lloyd type, and consists in lowering the proportion in the charge of substances which absorb heat during decomposition, but which do not react with the fuel of the charge, by the addition of inert substances, such as sinter returns, to such a degree that the endothermic reaction, and, if desired, complete sintering can be carried to completion by a given fuel content in the charge.ALSO:Relates to processes for the performance of endothermic reactions in blast-roasting apparatus, e.g. of the Dwight-Lloyd type, and consists in lowering the proportion in the charge of substances which absorb heat during decomposition, but which do not react with the fuel of the charge, by the addition of inert substances, such as sinter returns, to such a degree that the endothermic reaction, and, if desired, complete sintering can be carried to completion by a given fuel content in the charge. The process is applicable for cement making, the burning of limestone, dolomite, magnesite, gypsum, &c., for the decomposition of chlorides and sulphates, e.g. ferric sulphate, zinc sulphate, lead sulphate, for reduction purposes, &c. An example of a charge for Portland cement comprises 25 kg. of clay, 75 kg. of calcium carbonate, 100-120 kg. of sinter returns and sufficient coke breeze or like fuel to give 60-70 thousand calories. An example of a charge for decomposing a sulphate comprises 25 kg. of lead sulphate, 75 kg. of inert material (purple ore, sinter returns or the like) and fuel (e.g. coke breeze or pyrites) to yield 35000 calories. Other examples are given.
GB14710/31A 1930-05-19 1931-05-19 Process for performing endothermic reactions in blast apparatus Expired GB375950A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE375950X 1906-11-20

Publications (1)

Publication Number Publication Date
GB375950A true GB375950A (en) 1932-07-07

Family

ID=6344159

Family Applications (1)

Application Number Title Priority Date Filing Date
GB14710/31A Expired GB375950A (en) 1930-05-19 1931-05-19 Process for performing endothermic reactions in blast apparatus

Country Status (2)

Country Link
FR (1) FR375950A (en)
GB (1) GB375950A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2923539A (en) * 1956-05-02 1960-02-02 Dravo Corp Calcining or like process
CN113340105A (en) * 2021-07-05 2021-09-03 昆明理工大学 Method for decomposing and disposing phosphogypsum by using sintering machine and recycling phosphogypsum

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2923539A (en) * 1956-05-02 1960-02-02 Dravo Corp Calcining or like process
CN113340105A (en) * 2021-07-05 2021-09-03 昆明理工大学 Method for decomposing and disposing phosphogypsum by using sintering machine and recycling phosphogypsum

Also Published As

Publication number Publication date
FR375950A (en) 1907-07-26

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