GB969218A - Process and rotary kiln for the production of a light-weight material from wet, plastic clay - Google Patents

Process and rotary kiln for the production of a light-weight material from wet, plastic clay

Info

Publication number
GB969218A
GB969218A GB169561A GB169561A GB969218A GB 969218 A GB969218 A GB 969218A GB 169561 A GB169561 A GB 169561A GB 169561 A GB169561 A GB 169561A GB 969218 A GB969218 A GB 969218A
Authority
GB
United Kingdom
Prior art keywords
kiln
clay
casing
drying zone
wet
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
GB169561A
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.)
LECA WORLD Ltd
Original Assignee
LECA WORLD Ltd
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 LECA WORLD Ltd filed Critical LECA WORLD Ltd
Publication of GB969218A publication Critical patent/GB969218A/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B11/00—Machines or apparatus for drying solid materials or objects with movement which is non-progressive
    • F26B11/02—Machines or apparatus for drying solid materials or objects with movement which is non-progressive in moving drums or other mainly-closed receptacles
    • F26B11/028—Arrangements for the supply or exhaust of gaseous drying medium for direct heat transfer, e.g. perforated tubes, annular passages, burner arrangements, dust separation, combined direct and indirect heating
    • 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
    • C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
    • C04B20/02—Treatment
    • C04B20/04—Heat treatment
    • C04B20/06—Expanding clay, perlite, vermiculite or like granular materials
    • C04B20/061—Expanding clay, perlite, vermiculite or like granular materials in rotary kilns
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
    • F27B7/20—Details, accessories, or equipment peculiar to rotary-drum furnaces
    • F27B7/36—Arrangements of air or gas supply devices

Abstract

<PICT:0969218/C1/1> Light-weight rounded grains of clay with honeycombed structure are produced by heating wet plastic clay to incipient melting in a rotary kiln, the drying zone of which is provided with screens or grates which delay the passage through the drying zone of undesirably large lumps of clay. The order of size of the grains is 0.5-3.0 cms. and their weight about 300 kg./cu.m. They are useful as aggregates for lightweight concrete. The first lot of screens, 1, divide the interior of the drying zone of the kiln into quadrants. They are followed by a cylindrical screen 2 built up from a circular or a longitudinal course of iron bars and then by a cone or taper section 3 built up from circular rings and with a central aperture facing towards the burning zone. To obtain regular feeding of the kiln and to prevent freshly introduced wet clay adhering to the kiln wall near the entrance, a heat-conductive cylindrical or conical casing 4 is arranged at the feeding end, spaced from the kiln-wall so that waste gases 5 from the kiln can pass inside and outside the casing. Clay 6 is fed into the casing, the walls of which are kept hot enough to prevent the clay adhering to them. If desired, chains may be hung inside the kiln to increase the surface available for heat transfer. Damming units of various kinds, e.g. inclined shovels, may also protrude inwards from the walls of the kiln.
GB169561A 1960-01-15 1961-01-16 Process and rotary kiln for the production of a light-weight material from wet, plastic clay Expired GB969218A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DK15560A DK98939C (en) 1960-01-15 1960-01-15 Rotary kiln for firing a granular lightweight clay aggregate.

Publications (1)

Publication Number Publication Date
GB969218A true GB969218A (en) 1964-09-09

Family

ID=8090379

Family Applications (1)

Application Number Title Priority Date Filing Date
GB169561A Expired GB969218A (en) 1960-01-15 1961-01-16 Process and rotary kiln for the production of a light-weight material from wet, plastic clay

Country Status (6)

Country Link
BE (1) BE599118A (en)
CH (1) CH389489A (en)
DK (1) DK98939C (en)
GB (1) GB969218A (en)
NL (1) NL6612076A (en)
SE (1) SE310469B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0879651A2 (en) * 1997-05-19 1998-11-25 Humuspehtoori Oy Method and assembly for preventing sticking of fine-graded, moist material in the handling equipment of such material

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0879651A2 (en) * 1997-05-19 1998-11-25 Humuspehtoori Oy Method and assembly for preventing sticking of fine-graded, moist material in the handling equipment of such material
EP0879651A3 (en) * 1997-05-19 2000-08-16 Humuspehtoori Oy Method and assembly for preventing sticking of fine-graded, moist material in the handling equipment of such material

Also Published As

Publication number Publication date
DK98939C (en) 1964-06-01
BE599118A (en) 1961-05-16
CH389489A (en) 1965-03-15
NL6612076A (en) 1966-11-25
SE310469B (en) 1969-04-28

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