US743538A - Rotary kiln. - Google Patents

Rotary kiln. Download PDF

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Publication number
US743538A
US743538A US15247403A US1903152474A US743538A US 743538 A US743538 A US 743538A US 15247403 A US15247403 A US 15247403A US 1903152474 A US1903152474 A US 1903152474A US 743538 A US743538 A US 743538A
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Prior art keywords
cylinder
brackets
kiln
rotary kiln
shelves
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US15247403A
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Wilhelm Michaelis Jr
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Individual
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    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
    • E01C19/02—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for preparing the materials
    • E01C19/05—Crushing, pulverising or disintegrating apparatus; Aggregate screening, cleaning, drying or heating apparatus; Dust-collecting arrangements specially adapted therefor
    • 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
    • F27B7/34—Arrangements of heating devices

Definitions

  • the kiln in present use is simply a long cylinder in two sections set to have niore or less pitch toward the discharge end, at which is also introduced the heat. At the end of the cylinder at the point of highest temperature the walls are protected with fire-brick. Beyond this point the ordinary kiln is free and clear, permitting the slurry an uninterrupted flow.
  • the objects of my invention are to retard the movement of the slurry through the kiln and increase the surface area of the liquid in contact with the heat current, thereby increasing the evaporation, economizing in the application of heat or rather to increase the output of the kiln with the same amount of fuel.
  • Figure l is a side elevation of a rotary kiln.
  • Fig. 2 is a longitudinal section of a portion of the cylinder.
  • Fig. 3 is a transverse section of the same.
  • Fig. 4 and Fig. 5 are plan views of inner portions of the cylinder.
  • a is the rotary kiln, which consists of a long cylinder mounted with a decided pitch toward the discharge end.
  • brackets 12 b are brackets rectangular in form radially mounted on the inner shell of the cylinder longitudinally, divided bypartitions c c, as shown in the drawings.
  • the partitions c c divide the brackets in series in such a manner that radially the line ofpartitions takes the form of a spiral.
  • the liquid being lifted up on the shelves by the rotary motion of the cylinder it follows that it will run toward the discharge end of the drum and when the partition is reached will o'verfiow'iuto the shelf in the next adjoining series.
  • the brackets 12 b partake of the nature of troughs having a side d, which holds the liquid and carries it up. Any solid matter in the troughs will drop out as the brackets reach a vertical position in the'moving cylinder.
  • a rotatable cylinder having a section lined with fireproof material, fireproof shelves projecting ⁇ from the inner surface of said section and arranged spirally, rectangular lifting and agitating brackets radially mounted on the inner shell of the unlined portion of said cylinder, partitions arranged spirally with reference to each other dividing said brackof the contents of said cylinder, substan- IO tially as specified.

Description

PATENTED NOV. 10, 1903.
\ UNITED S'r-rrrss Patented November 10, 1903.
WILHELM MICHAELIS, JR, OF CHICAGO, ILLINOIS.
ROTARY'KILN.
SPEGIFIGATION forming part of Letters Patent No. 743,538, dated November 10, 1903. Application filed April 13, 1903. $erial ll'o.l52,474. (N0 model.)
I To aZZ whom it may concern:
tion, producing the calcined clinker-,which is afterward ground or pulverized. The kiln in present use is simply a long cylinder in two sections set to have niore or less pitch toward the discharge end, at which is also introduced the heat. At the end of the cylinder at the point of highest temperature the walls are protected with fire-brick. Beyond this point the ordinary kiln is free and clear, permitting the slurry an uninterrupted flow.
Now the objects of my invention are to retard the movement of the slurry through the kiln and increase the surface area of the liquid in contact with the heat current, thereby increasing the evaporation, economizing in the application of heat or rather to increase the output of the kiln with the same amount of fuel.
I attain the objects of my invention by means of shelves or brackets set radially against the inner shell of the cylinder,and by means of partitions arranged spirally with reference to each other divide the brackets into parts or series adapted to discharge the contents of one series of brackets into the next adjoining series. It is obvious that as the rotating cylinder constantly agitates and lifts upon the shallow brackets the liquid slurry and discharges it into the next series a considerably larger surface area of the liquid is exposed to the current of heat than in the ordinary kiln now in use, by which the evaporation is increased in the same relative proportion as the surface area of the liquid has been expanded. As these shelves or brackets are impracticable in that portion of the kiln or cylinder which is lined with firebrick, I provide a means for the application of the same principle in a modified form in that portion of the him which serves the purpose, first, of facilitating the evaporation, and, secondly, facilitating the discharge of the dry calcined clinker.
In the drawings, Figure l is a side elevation of a rotary kiln. Fig. 2 is a longitudinal section of a portion of the cylinder. Fig. 3 is a transverse section of the same. Fig. 4 and Fig. 5 are plan views of inner portions of the cylinder.
a is the rotary kiln, which consists of a long cylinder mounted with a decided pitch toward the discharge end.
1) b are brackets rectangular in form radially mounted on the inner shell of the cylinder longitudinally, divided bypartitions c c, as shown in the drawings. The partitions c c divide the brackets in series in such a manner that radially the line ofpartitions takes the form of a spiral. The liquid being lifted up on the shelves by the rotary motion of the cylinder, it follows that it will run toward the discharge end of the drum and when the partition is reached will o'verfiow'iuto the shelf in the next adjoining series. The brackets 12 b partake of the nature of troughs having a side d, which holds the liquid and carries it up. Any solid matter in the troughs will drop out as the brackets reach a vertical position in the'moving cylinder.
;In that portion of the cylinder which is lined with fire-brick I arrange the lining so that .the alternate spaces are composed of brick 6, having a wedge shape projecting sufficient to form short shelves and set radially against the inner shell of the cylinder, also arranged spirally. These projecting shelves carry up the clinker and permit it to slide ofi, thus loosening it up and letting it fall through the heat-current and gradually advancing it through the cylinder.
Having thus described my invention, what I claim as new, and desire to protect by Letters Patent, is v 1. In a rotary kiln, in combination, a rotatable cylinder having a section lined with fireproof material, fireproof shelves projecting {from the inner surface of said section and arranged spirally, rectangular lifting and agitating brackets radially mounted on the inner shell of the unlined portion of said cylinder, partitions arranged spirally with reference to each other dividing said brackof the contents of said cylinder, substan- IO tially as specified.
In testimony whereof I affix my signature in presence of two witnesses.
WILHELM MIoHAELIs, JR.
Witnesses:
H. HUNSBERGER, S. P. MCKELVEY.
US15247403A 1903-04-13 1903-04-13 Rotary kiln. Expired - Lifetime US743538A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2503686A (en) * 1946-06-05 1950-04-11 Overmander Machine Inc Aggregate drier
US2829877A (en) * 1955-09-09 1958-04-08 Kaiser Aluminium Chem Corp Refractory
DE1114971B (en) * 1955-08-10 1961-10-12 Ivar Thomsen Refractory wedge for building the refractory lining of a rotary kiln

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2503686A (en) * 1946-06-05 1950-04-11 Overmander Machine Inc Aggregate drier
DE1114971B (en) * 1955-08-10 1961-10-12 Ivar Thomsen Refractory wedge for building the refractory lining of a rotary kiln
US2829877A (en) * 1955-09-09 1958-04-08 Kaiser Aluminium Chem Corp Refractory

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