GB731923A - Process for the thermal treatment of finely divided solids - Google Patents

Process for the thermal treatment of finely divided solids

Info

Publication number
GB731923A
GB731923A GB2216651A GB2216651A GB731923A GB 731923 A GB731923 A GB 731923A GB 2216651 A GB2216651 A GB 2216651A GB 2216651 A GB2216651 A GB 2216651A GB 731923 A GB731923 A GB 731923A
Authority
GB
United Kingdom
Prior art keywords
conduit
solids
bed
finely divided
thermally
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
GB2216651A
Inventor
Frank Stevenson White
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.)
Dorr Co
Original Assignee
Dorr Co
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 Dorr Co filed Critical Dorr Co
Priority to GB2216651A priority Critical patent/GB731923A/en
Publication of GB731923A publication Critical patent/GB731923A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B1/00—Preliminary treatment of ores or scrap
    • C22B1/02—Roasting processes
    • C22B1/10—Roasting processes in fluidised form
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J8/00—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
    • B01J8/18—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles
    • B01J8/24—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles according to "fluidised-bed" technique
    • B01J8/32—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles according to "fluidised-bed" technique with introduction into the fluidised bed of more than one kind of moving particles

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Environmental & Geological Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)

Abstract

A process for heat treating finely divided solids by up-flow of hot gas, which comprises feeding them, as in the apparatus shown, through conduit 38 to a bed 22 of thermally-stable coarser solids resistant to gas entrainment, controlling the velocity of the gas through the bed so as to maintain the thermally-stable solids as a fluidized bed whilst propelling the fine solids upwardly into a freeboard space 23 for discharge to a separator 40, and maintaining the bed at an elevated temperature, is characterized in that the thermally stable solids are of the same chemical composition as the reacted finely divided solids whereby contamination of the latter is avoided. The heat required in the process may be produced by fuel supplied through conduit 44, or by preheating the fluidizing gas supplied through conduit 29. If necessary, water for cooling may alternatively be supplied through conduit 44. Conduit 25 <PICT:0731923/III/1> serves for the supply of the coarser solids, and conduit 27 for fuel for starting up the process. The level of the bed is controlled by the operation of valves in overflow conduits 32, 34, 36. The process is applicable to the calcination of calcium carbonate sludges, to the roasting of sulphide ores such as pyrite, to the reduction to magnetite of hematite, and to the treatment of red mud from the Bayer process. Specification 593,180 is referred to.
GB2216651A 1951-09-21 1951-09-21 Process for the thermal treatment of finely divided solids Expired GB731923A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2216651A GB731923A (en) 1951-09-21 1951-09-21 Process for the thermal treatment of finely divided solids

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2216651A GB731923A (en) 1951-09-21 1951-09-21 Process for the thermal treatment of finely divided solids

Publications (1)

Publication Number Publication Date
GB731923A true GB731923A (en) 1955-06-15

Family

ID=10175021

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2216651A Expired GB731923A (en) 1951-09-21 1951-09-21 Process for the thermal treatment of finely divided solids

Country Status (1)

Country Link
GB (1) GB731923A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0076457A2 (en) * 1981-10-01 1983-04-13 Bergwerksverband GmbH Process and apparatus for the regeneration of moist, powdery adsorbents
GB2173124A (en) * 1985-03-29 1986-10-08 Scient Design Plant And Proces Removing particles from gas
GB2244939A (en) * 1990-05-11 1991-12-18 Richards Eng Ltd Thermal reclamation method and apparatus
US5271450A (en) * 1990-05-11 1993-12-21 Richards Engineering Limited Thermal reclamation method

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0076457A2 (en) * 1981-10-01 1983-04-13 Bergwerksverband GmbH Process and apparatus for the regeneration of moist, powdery adsorbents
EP0076457A3 (en) * 1981-10-01 1984-01-11 Bergwerksverband Gmbh Process and apparatus for the regeneration of moist, powdery adsorbents
GB2173124A (en) * 1985-03-29 1986-10-08 Scient Design Plant And Proces Removing particles from gas
GB2244939A (en) * 1990-05-11 1991-12-18 Richards Eng Ltd Thermal reclamation method and apparatus
GB2244939B (en) * 1990-05-11 1993-12-08 Richards Eng Ltd Thermal reclamation method and apparatus
US5271450A (en) * 1990-05-11 1993-12-21 Richards Engineering Limited Thermal reclamation method

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