Патент USA US2129434код для вставки
Sept., 6, 1938. A. F. MlLLER ' 2,129,434 ROCK WOOL BLOW CHAMBER Filed Jan. 25, 1_93'7 N. tm WN. Vía/Wim» 2,129,434 Patented Sept. 6, 1938 Y UNITED STATES PATENT OFFICE 2.129.434 y noon woor. Brow CHAMBER. Arthur F. Miller, Jackson. Mich., assignor to Marquette Cement Manufacturing Company, a corporation of Illinois Application January 25, 1937, serial No. 122,326 6 Claims. 'I'his invention relates to rock wool manufacture and more particularly to a blow chamber into which the mass of -wool material and shot is blown. 5 . ' In making rock wool from fused rock wool material, a thin stream of the fused rock is vio lently disintegrated by a blast of steamer air forming fibers of rock wool and larger so-called “shot" particles. 'I‘he shot particles. being larger 10 and heavier, tend tosettle out more rapidly, and the present chamber is designed to remove as large a proportion of these as practicable, and at the same time to produce continuously a uniform mass or mat of fibrous material. l5 (ci. 154-27) - horizontal are approximately equal, although in opposite directions. ' The center section 2| of the roof is approxi mately horizontal and covers approximately three-sevenths of the conveyor belt 30, which will be hereinafter described. The third section 22 of the roof is downwardly inclined at an angle slightly less than that of section I 9, and covers about half ofthe remainder of the belt, while sec tion 23v continues downward at a greater angle 10 covering the remaining portion of the belt 30. y It will be noticed that this configuration of the roof directs the incoming gases downwardly to ward the belt 30 without the provision of any The invention is illustrated in the drawing. in _ dead air spaces within which eddies can be set which Fig. 1 represents a sectional elevation of the blow chamber; Fig. 2, a sectional plan view taken along the line 2-2 in Fig. l; and Fig. 3, a cross 20 section taken at the .point 3 in Fig. 1. In producing rock wool, rockv wool material is melted as desired, for example in the cupola (not up. With light material, such as rock wool, any substantial eddy will cause material to be heldin the air until it has reached considerable weight _after which it will fall regardless of the eddy. Such falls, however, will produce irregularities in the mat upon the belt. ' The belt I0, which is to receive the wool übers, is preferably of a foraminous texture and is mounted upon the rollers 3l, 32,' 33, 34 and 35, shown) and a thin stream of the molten material from the cupola is blasted by a jet of steam or air 25 forming fibers and shot which enter the chamber which are driven to rotate the belt in the direc-` at the entrance I 0, as shown in Fig. 1. An end v tion of the arrow and carry the wool ñbers out of less belt I I carried by the driven wheels I2 and I3, the chamber at the opposite end from the en-` is positioned below theventrance and is of such trance III. Beneath the belt are mounted a plu length as to catch a large portion of the shot rality- of suction chambers 3G, each of which is 30 material and any heavy unblown slag. The provided with an exhaust 3‘I.> The exhaust may wheels I2 and I3 are so driven as to rotate the feed into a manifold or may be individually con trolled. In the latter case, it is possible tol obtain belt in the direction shown by the arrow, carry ing the heavier material out of the chamber and greater uniformity in the ribbon of rock wool pro- f into the cinder pit I4. A flexible guard I 5 is posi ' 35 tioned above the belt to restrict the amount of gas which may leave the chamber around the belt. A similar guard may be provided below the belt, if desired. The belt II is upwardly inclined to provide a 40 baille and may extend into the chamber a con siderable distance, for example. as much as ten or twelve feet from the mouth. Beneath the mouth II) is a‘plate I 6, downwardly inclined, which extends- out over theïlower por 45 tion of the belt II and is provided with a down ward extension I‘I upon which the flap I5 is car ried. The roof I8 of the chamber is built in several sections to provide a stream-line eil'ect and to avoid, so far as possible, the setting up of 50 undesirable eddies or currents within the cham ber. The first section I9 of the roof extends from the entrance ID to a point 20 roughly above the end of the belt I I, the angle of the section I9 being substantially that of the belt. The deviation of 55 the plate I6 and of the roof section I9 from the duced, by progressively increasing the vacuum in the direction of movement of the wool material. The belt 30 is preferably below the baille belt I I. The area controlled by each chamber is pref erably small, for example not-substantially more than four or five feet. At the exit side of the blow chamber, means are 40 provided for compressing the mineral wool de posited on the belt 30. This means preferably comprises a belt 40 on rollers 4I, 42 and 43, the roller 42 having its axis below a line connecting the axes of rollers 4I and 43 to provide an out-~ wardly curved portion on the lower side of the belt, or, if desirable, a fourth roller may be in serted for this purpose. Inasmuch as the thickness of material on the belt increases toward the exit side of the cham ber, it is preferable to progressively increase the ' vacuum on the suction chambers in the same di rection, in order to utilize the depositing surface of the belt to the maximum extent. Likewise, the shape of the chamber already de 2 2,129,434 scribed is such as to tend to equalize the velocity at the front and rear of the belt 30, thereby de livering substantially uniform amounts of mate rial to the various portions of the belt, and in creasing the effectiveness of the depositing area. In blow chambers now in general use, escape vents are provided for steam and air entering the chamber at the low point. The escaping air or steam carries with it light and ñne parts of rock 10 wool ñbers in amounts suiiicient to cause con-> siderable loss over a long period, and at the same time the subsequent settling of the material out side constitutes a nuisance. In the present de sign this problem is completely solved because the 15 ribbon of material acts as a ñlter body'for such fine material through which all of the outgoing gas must pass. The side walls I8 of the blow chamber are pref erably substantially vertical or converge slightly -20 toward the belt, thereby insuring proper settling conditions. The foregoing detailed description has been given for clearness of understanding only and no unnecessary limitations should be understood therefrom, but the appended claims should be construed as broadly as permissible in view of the prior art. f I claim: 1. In a rock wool blow chamber; the combina 30 tion of means for blowing molten wool rock into a chamber, a foraminous conveyor within the chamber, and a plurality oi' suction means ar ranged progressively along the conveyor and op erating therethrough, the suction means being 35 adapted to produce a progressively higher vacuum in the direction of movement of the conveyor. 2. In a rock wool blow chamber; the combina tion of means for blowing molten wool rock into the chamber, a foraminous conveyor within the 40 chamber, and means for subjecting the conveyor to progressively higher vacuum in the direction of its movement. 45 ` 3. The method of blowing rock wool, which comprises melting wool rock material, disinte grating a stream of the molten material to pro duce rock wool ñbers, directing. the formed fibers into a settling chamber wherein they are per mitted to settle upon a conveyor, and subjecting the conveyor to a progressively increasing vac uum in the direction of its movement. 4. In combination with means for producing and blowing molten rock wool material, a cham ber having‘an opening at one end associated with the means for blowing the rock wool material, said chamber having substantially vertical side walls, a foraminous conveyor substantially of the same width as the chamber longitudinally ar ranged therein, means for exhausting gas through 10 the conveyor, said chamber having a roof, the conveyor and the roof of the chamber being posi tioned to approach each other in the direction of movement of the conveyor, said conveyor being adapted to move in a direction away from the in-_ 15 troduced rock wool material. 5. In combination with means for producing and blowing molten wool rock material to pro duce rock wool ñbres and shot; a blow chamber having an entrance and exit, an upwardlyv in» 20 clined conveyor near the entrance of the chamber adapted to receive shot and move it downwardly from the chamber, asecond conveyor nearer the exit of the chamber than the iirst and positioned below the upper end of the ñrst conveyor, said 25 chamber having substantially vertical side walls, said second conveyor lhaving substantially the width of the chamber, and the roof of the con yveyor being substantially parallel to the first con veyor throughout its length and approaching the 30 second conveyor substantially throughout its length, and means beneath said second conveyor for removing gases from the chamber, said cham ber being sealed to prevent escape of gases except through said second conveyor. y 6. In combination with means for producing and blowing molten rock wool material, a cham ber having an opening at one end associated with the means for blowing the rock wool material, a conveyor longitudinally arranged within the chamber, means for exhausting gas through the 40 conveyor, said exhausting means being substan tially the only escape for gases from the chamber, and the chamber have substantially vertical walls and a roof gradually approaching the conveyor in the direction of its movement, and said con~ veyor being adapted to move in a direction away from the introduced rock material. ARTHUR F. MILLER.