US550619A - And harry j - Google Patents

Description

(No Model.) 3 Sheets-Sheet L.

E. H. HURRY 8: H. J. SEAMAN. PROCESS 01-" AND APPARATUS FOR MANUFACTURE OF CEMENT.

No. 550,619. Patented Dec. 3, 1895.

L ni Illllllllllllllllj mui tt uiifi WITNESSES:

b A ATTORNEYS AN DREW B.GRA HAM. PHOTO-UTHQWASNINGTDN D C.

(No'ModeL) r V I 3.S'heets8heet 2. E. H. HURRY 8; HQ J; SEAMAN.

PROCESS OF AND APPARATUS FOR MANUFACTURE OPCEMENT.

No. 550,619. PatentedDe'c. s, 1895 WITNESSES? 1 NV Tons M v (5. 71 4 A BY )1 v ATTO R N IEYC.

ANDREW BRGRANAM PHOTQ-UTNU.WASNINGTON D C.

(No Model.) A v 3 -SheetsSheet 3. E. H. HURRY 8: H; J.. SEAMAN. PROGESS 0E AND APPARATUS FOR MANUFACTURE OF CEMENT.

Patented Dec. 3, 1895.

Ma 3. A

ATTORNEYS AN DREW BGRAHAM. FHDTO-UTNQWASHIIVGTON. DC,

UNITED [STAT-Es PATENT? O FICE.

EDW ARD H. HURRY, OF NEWV BRIGHTON, NEW YORK, AND HARRY J.

' SEAMAN, QF OATASAUQUA, PENNSYLVANIA.

PROCESS OF AND APPARATUS FOR MANUFACTURE OF CEMENT.

SPECIFICATION forming part of Letters Patent No. 550,619, dated December 3, 1895. Application filed November 28, 1894. Serial No. 530,260. (No model.)

To aZZ whom it may concern.-

Be it known that We, EDWARD H. HURRY, a subject of the Queen of Great Britain, residing atNew Brighton, Richmond. county, New York, and HARRY J. SEAMAN, a citizen of the United States of America, residing at Catasauqua, Lehigh county, Pennsylvania, have invented certain new and useful Improvements in Processes of and Apparatus for the Manufacture of Cement, of which the following is a specification.

The present improvements relate generally to the manufacture of Portland or similar cement, and more particularly to a novel process of and apparatus for the cooling of the hot-cement clinker.

As most commonly practiced the hot-cement clinker from, say, a rotary furnace has been taken and heaped in piles or spread in a more or less thin layer upon a concrete floor and left to cool, taking many days in the process, depending upon the depth of the pile or the thickness of the layer, and in this Way a very large floor space was needed, requiring the employment of a great quantity of material in process of'manufacture before it could be advanced to the finished product.

The present invention has for its object to provide a process for roasting the cement material and cooling the hot clinker as a continuous process, whereby a considerable saving is made, a less extensive plant is needed, less material required to be in process of manufacture without reducing the output, and to generally overcome the objections inherent in the modes of manufacture hereto fore practiced; and to this end-the improvements consist in the continuous process and apparatus for roasting the cement material and cooling the hot clinker; in the process and apparatus for cooling hot clinker, irrespective of its mediate or immediate connection with a roasting process and apparatus, and in certain details of construction, all as will be hereinafter fully set forth.

In order to aid a more complete understanding of the nature and scope of the improvements, we have illustrated in the accompanying drawings an improved apparatus for roasting the cementmaterial and cooling the clinker, embodying also an apparatus adapted 1 parting from the essentials of the invention.

In said drawings, Figure 1 is a sectional elevation of a roasting and cooling plant em bodying the present improvements and adapted to the carrying out of the novel process.

Fig. 2 is a longitudinal sectional elevation of a portion of the cooling-cylinder and its immediate adjuncts. Fig. 3 is a cross-section of the cooling-cylinder on the line 3 of Fig. 2. Fig. 4 is an enlarged sectional detail of the connection between the rotatable cooling-cylinder and the stationary clinker guide-chute, showing the manner of providing a tight joint between the two; and Fig. 5 is a similar view, partly in elevation, of the same parts.

Before entering into a detailed description of the apparatus it may be premised that in the manufacture of cement, so far as. the apparat us as herein shown is concerned,the cement material is fed in a continuous stream into the roasting-furnace, preferably a rotary furnace, and inclined with the heat or roastingflame entering the furnace at its exit end and projected therethrough toward the entrance end of the material in a direction opposed to the onward travel of the material being roasted. In its passage through the furnace the material gets hotter and hotter until it gets within the zone of the flame, when the particles commence to adhere and finally assume a clinker form or mass irregular in shape and size, in which condition masses red or white hot pass, preferably into a conduit consisting of a rotary cylinder, through which air passes to be heated by the presence of the hot clinker, to be thence led to the furnace to aid the support of combustion therein. So far the mode of operation described is one heretofore practiced, the hot clinker, not materially cooled, hitherto being removed from the rotary-cylinder conduit and piled in heaps upon the cooling-floor, and there left for many days before adapted for the final grinding operation.

In the present improvements the hot clinker from the rotary or other conduit is allowed to pass through a breaker, by which the hot clinker masses are reduced or broken into a small and more or less uniform size, (but not finely pulverized, as in its finished c'o'ndition,) and, as an additional step in the process, is also wetted by a stream or streams of water, which is applied to the hot material either be fore or after the reducing operation or simultaneously therewith, whereupon the reduced and Wetted material is conducted or passed through a conduit, preferably a rotary one, and while being so conducted is subjected to a draft or strong current of air, produced naturally or artificially, which causes a rapid evaporation of the water or moisture from the re duced material and cools it down suffi ciently, so that at the time it reaches the point of exit of the conduit it is in condition for immediate handling. The speed at which the material is allowed to pass through the conduit will depend largely upon the degree of fineness to which the hot clinker is reduced by the break ing operation, the quantity of water supplied to and allowed to mix therewith, and the volume of air to which the material or wet material is subjected.

The apparatus in the preferred but not necessary embodiment of the invention consists of a rotary cylindrical furnace A, comprising an exterior metallic shell or casin g lined with fire-brick and mounted in a horizontally-inclined position having tracks ct, which bear upon roller-bearings b, rotary motion being imparted to the furnace by a pinion c, meshing with a toothed wheel (1 on the furnaceshell, the pinion being driven in any proper manner, as from a driven worm-shaft e and worm f.

The upper or entrance end of the furnace A projects into the upper end of a vertical chamber B, having connection with a stack 0 for the escape of the waste heat and products of combustion, while the opposite or exit end of the furnace projects into an exit or fuel chamber D, having an inclined floor or chute g for leading off the hot clinker falling from the furnace. The two chambers B and D are formed by masonry lined with fire-brick to withstand the great heat. The chamber B has an opening h closed by a door directly opposite the entrance end of the furnace, to view, if need be, the interior of the furnace, and the lower portion of the chamber below the entrance of the furnace forms a pit, tc which access may be had through a lower opening 2', closed by a door, the communica tion of the chamber with the stack being had through an openingrj, preferably at the side of the chamber. This chamber B also has a conduit m, water-jacketed, if need be, leadingfrom top of the chamber to the entrance end of the furnace for the feed thereto of the material from any suitable source of supply;

The chamber D has means for supporting a fuel-burner E say an injector-burner, for supplying crude petroleum, and air introduced into the exit end of the furnace and ignited, producing a long intensely-hot flame through the furnace, heating the interior thereof tothe degree required to produce the freshly-made clinker directly into the entrance end of a conduit F, consisting of a horizontally-inclined rotatable cylinder, through which the hot clinker is more or less slowly conducted to its exit end against a natural draft of air,which is thereby intensely heated to pass upward into the exit-chamber and thence into the furnace to aid and support the combustion of the hydrocarbon injected bytheburner'E; V w

The cylinder conduit F is mounted like the furnace A to revolve on roller-bearings n and rotated by a pinion o, meshing with a toothed wheel 19 on the cylinder, the pinion being driven in any proper inanner not necessary to describe:

The hot clinker from the exit end of the cylindenconduit F is preferably allowed to fall directly into a reducing or breaking apparatus G, (represented by a pair of crushingrrolls 8 9,) rotated in any proper manner within a housing 10 and immediately, above and connecting with a closed inclined chute 11. lVhil'e the hot clinker is being reduced or broken, it is preferably wetted by, for instance-,- a supply of water from a nozzle or nozzles 2, which direct streams of water onto the surface or surfaces of the crushing-rolls as they rotate in crushing the hot clinker.

The reduced clinker wetted and the surplus water, if there be any, is caught by the closed chute 11 and directed into the entrance end of a cooling-conduit H, preferably of considerable length, and through which the material is slowly conducted to the point of ultimate discharge, ready for immediate and further treatment, such as pulverizing to the desired fineness necessary to' the making of ahydraulic cement, s

The cooling-conduit H, preferably, itself receives and conducts the wetted material to the point of discharge-that is to say, there need be no conveyer moving through it to carry or convey the material therethrough and for this purpose this conduit H is also in the form of a rotatable cylinder similar to the conduit F. It is mounted in an inclined horizontal position to rotate on roller-bearings 7 and revolved at the desired speed by apin'ion 6, gearing with a' toothed wheel 5 on the c t ind'er, the pinion being driven in any suitable manner. 7 The cylinder is made up of short connected sections and its interior is provided with a multiplicity of short radial blades 12, straight blades alternated with curved or bent ones, the blades of one section alternating with those in the adjoining sections, so that the material in its passage through the cylinder is subjected to a constant tumbling or tossing action and made to IIO simultaneously with its being reduced or broken or in addition thereto a supply of water may be sprayed upon the material after it has been reduced, and for this purpose the perforated end of a water-pipe 14 may be led I through a boss 13 into the chute and, if desired, projected into the entrance end of the conduit H, as in Fig. 2, to direct water onto the material therein and into intimate mixture therewith. The mixing of water, even with the reduced material, in the manufacture of Portland cement we have found, so long as it is not pulverized to the finished condition, has absolutely no deleterious eifect-that is to say, there is no danger of the material setting by the addition of water, for the reason that to effect its setting the material must be reduced to an exceedingly-fine state of subdivision.

The current of air referred to is drawn from the outside atmosphere through the cooling-conduit H, entering at its discharge end, passing thence in contact with the reduced and wetted material in the conduit in a direction opposed to the onward movement of such material and out at its entrance end and preferably through the closed guidechute 11 to a place of discharge. The continuous supply of cool air from the atmosphere aids in materially reducing the temperature of the material, as well as causing a rapid evaporation of the moisture contained with the material and by such evaporation also effecting a cooling action, the heat and moisture therefrom being absorbed by the air as it passes onward and is carried off from the conduit. This cooling and evaporating current of air may be produced in any proper manner, as by an exhaust or suction apparatus 1, (indicated by dotted lines, Fig. 2,) connected with the interior of the conduit and guide-chute by a pipe 15, leading from a nozzle 16, projecting from the guide-chute, the opening leading to the nozzle being covered by a fine-wire screen 42 to prevent the carrying off of particles of the material.

To compel the draft of air through the revolving conduit H to start from its discharge end and thus obtain its maximum effect on the material, the joint between it and the stationary guide-chute 11 is preferably constructed air-tight, and to this end the guidechute terminates in tubular extension 18, projecting into the central opening of the head 19 of the conduit. Around the extension is mounted a longitudinallymovable annulus 20, having a vertical face bearing tightly against the head 19, thus closing the joint between the conduit and chute. The annulus is prevented from turning by lugs 21, which project into slots 22, formed, it may be,

1 by 'earsprojecting from the chute or the securing-flange of the extension 18, and it is held yielding in surface contact with the conduit-head by a number of suitable springs 23, interposed between the annulus and the chute or the flange of the extension.

It is to be understood that the apparatus herein described is simply one we prefer to use, not intending thereby to limit our invention to the precise apparatus, nor is our improved process in its practical application necessarily limited to the use of such apparatus.

\Vhat is claimed is 1. The herein described process for cooling hot cement clinker, which consists in wetting the hot clinker and then subjecting it to a tumbling or tossing action in the presence. of air.

2. The herein described process for cooling hot cement clinker, which consists in wetting the hot clinker and then rapidly evaporating the moisture therefrom.

3. The herein described process for cooling hot cement clinker, which consists in reducing the hot clinker to a broken condition,

wetting the hot clinker and subjecting the wet and broken material to a cooling atmosphere.

4. The herein described process for cooling hot cement clinker which consists in break ing and wetting the hot clinker and then rapidly evaporating the moisture from the broken material. a

5. The herein described process for cooling hot cement clinker, which consists in breaking and wetting the hot clinker, tossing the broken material and rapidly evaporating the moisture therefrom.

6. The herein described process for cooling hot cement clinker, which consists in simultaneously Wetting and breaking the hot clinker, supplying additional water to the broken material and subjecting it to the ac tion of the atmosphere.

7. The herein described continuous process in the manufacture of cement, which consists in roasting the cement material, partially co0ling the hot clinker, then breaking andwetting it and then evaporating the moisture from the broken material.

8. The combination with a conduit for the hot clinker, a reducing or breaking apparatus therefor, a pipe for supplying water to the hot material and a leading ofi conduit for the broken and wetted material, as set forth.

9. The combination with the breaking rolls, the housing therefor and the inclined chute leading from the rolls, of a conduit leading from said chute and a water pipe extending into the chute, as set forth.

1.0. The combination with the breaking rolls, and the water supply for directing water onto said rolls, of a conduit taking the material from the rolls, and an exhausting apparatus for drawing air through the conduit, as set forth.

11. The combination with the breaking rolls, the Water supply feeding Water to the rolls and a chute leading from the rolls, of a conduit extending from the chute, a Water 5 supply leading into said conduit, and an exhausting apparatus for drawing air through the conduit, as set forth.

In Witness whereof We have hereunto signed our names in the presence of two Witnesses.

EDWARD H. HURRY.

HARRY J. SEAMAN. Witnesses:

GEO. H. GRAHAM, E. L. TODD.

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