FI118123B - Apparatus and apparatus for processing powdered material - Google Patents

Description

1,118,123

APPARATUS AND METHOD FOR POWDER MATERIAL

DEALING

This invention relates to an apparatus and method for treating powdered material 5. More particularly, the invention relates to an apparatus and method for treating powdered material contained in a silo or similar container and operating therewith, for treating powdered material in a silo or similar container.

10 Plate feeders are commonly used for feeding various powder or powder-like materials from a silo or similar container. The purpose of the plate feeders is to ensure a steady flow of material to the material retained in the silo during disassembly and transfer to the process. The plate feeder is mounted to rotate under the funnel-shaped discharge opening at the lower end of the silo, whereby a steady stream of material is discharged from the silo, where it is removed for further processing in the process. Such a prior art plate feeder is known e.g. from US 3,369,645.

US 3,369,645 discloses a plate feeder for: V: 20 for processing powdered material. In it, the plate feeder is rotated through a toothed ring * · * "on the circumference of the flat plate. The material is fed from the silo to the flat plate feeder through the discharge opening. The material coming to the plate feeder * · ·.

the amount is controlled by a vertically movable collar that adjusts the 25 slots between the plane surface of the plate feeder and the opening of the silo and thus the rate at which the material enters the plate ··: * ··. Adjustment is achieved by tightening or loosening the bolts placed outside the collar * * · • ·. Material: V is removed from the plate for the belt conveyor running below the plate by means of a guide. The joystick is moved by a push rod and an electric motor and is ··· 30 articulated at one end to the outside of the bowl.

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Prior art disc feeders have the problem of clogging them if the material to be processed is lumpy or for some reason contains larger pieces of otherwise homogeneous material. In addition, the material to be treated may be quite abrasive to the parts of the plate feeder 5 which come into direct contact with the material. In addition, adhesion of the material to the surface of the equipment will complicate the operation of the equipment and may cause the entire system to become clogged. The rotation mechanism disclosed in US 3,369,645 requires continuous maintenance. In prior art equipment, the starting torque is too low, especially in the after-start 10, when wet material is packed against the feeder.

The object of the invention is to provide a new, inventive, maintenance-free and reliable apparatus for handling powdered material. It is a further object of the invention to provide a new and inventive method for treating powdered material.

The above-described objects are achieved by the apparatus and method according to the independent claims. In addition, the sub-claims disclose other preferred embodiments of the invention.

·· * · 20 • ·: The invention is characterized by what is defined in the characterizing parts of the independent claims *: ··:.

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In the following, the invention will be described in more detail with reference to the accompanying drawings 25, in which Fig. 1 is a general view of the apparatus of the invention, Fig. 2 is a side view of a preferred embodiment of the inlet. 30, a side view of a preferred embodiment of the inlet mechanism, and 35 Figure 4 illustrates an adjustable collar of the inlet hopper.

3, 118123

Figure 1 is a top plan view of an apparatus for treating powdered material according to the invention. Particularly preferably, the apparatus is suitable for feeding heavy materials, such as fine chromite, from a silo or similar container. The apparatus consists of a feed hopper 1 which is located, for example, below the outlet of the silo hopper (not shown). The hopper 1 and the silo hopper are preferably connected to one another, for example by a flange connection. The hopper 1's flange 2 is shown in Figure 1. When the hopper is full, the material to be processed rests on a plate feeder 3 mounted directly underneath the hopper 1. ), which moves the material forward in the process. In Figure 1, the outlet 5 of the hopper 1 is located mainly behind the rim 6. Below the plate feeder 3 is its drive apparatus 7, which preferably comprises an electric motor 8 and a gearbox 9. The plate feeder 3 is preferably rotated from an axis connected to its center. This enables more reliable operation than in prior art equipment where the drive is carried out from the outer edge 10 of the feed disc 3 by means of a rack and pinion. In addition, the use of a v 20 axis connected to the midpoint ensures sufficient torque, especially after stopping, when wet material is packed against the feeder.

* • ·

Preferably, the entire installation is mounted on the foundation 11, which makes it easier to carry out any maintenance work. In addition, the feed plate 25 3 has lifting lugs 12. The lifting lugs 12 can be suspended from the bottom of the silo by means of • · slings to provide • · * ·; · * easy and quick change gear 9 simply by pulling it out ···: V when the gearbox breaks down or requires maintenance. This allows * * · to reduce downtime. There are 2 to 8 lifting lugs 12, but 30 preferably 4. The existence of the lifting lugs 12 ·: **: allows the transmission 7 to be changed without emptying the silo, which is particularly advantageous.

4, 118123

Circular rods 13 are provided on the feed plate 3 which provide an autogenous lining on the surface of the feed plate 3 as the feed plate rotates. The amount of material fed by the feeding plate 3 is controlled not only by the speed of rotation of the feeding plate 3, but also by the operation of the discharge opening 5 of the feeding hopper 1. A shut-off plate 14 is hingedly mounted at its upper edge to the discharge opening 5. A counterweight 15 is attached to the shut-off plate 14, which tends to close the shut-off flap by gravity. The counterweight 15 provides an adjustable amount of material coming from the discharge opening 5. The mechanism is described in more detail below with reference to Figure 2.

Another advantageous embodiment is to use a spring which similarly controls the opening of the shutter plate 14. The spring is then mounted, for example, midway between the closing plate 14 and connected at a corresponding position 4 15 to the edge of the outlet opening 5 of the hopper. This embodiment is illustrated in more detail in Figure 3. Furthermore, the discharge opening 5, which operates in both ways described above, does not become clogged if lumps or other larger particles are present in the material to be treated. When such a problem arrives at the discharge port 5 ·: ·, the discharge port can adapt to it and pass it through automatically · · * ·: V: 20 so that the discharge port does not become blocked and interferes with the smooth flow of material.

• * · • · · φ · • *

The amount of material flow is also adjustable by an adjustable lower bead 16, which is fixed to the lower part of the fixed hopper, i.e. · · «, by adjusting up or down position of lower lip 25 16 to provide a controlled gap between the rotating feeder 3 and lower hopper 16 of hopper 1; · 'The material rests directly on the surface of the tray 3.

* · · • · <* • · ·

In order to achieve better material migration and reduced non-stickiness ··· 30 and to reduce wear and corrosion, the inner surface 17 of the hopper 1, the doctor knife 4 and the stop plate 14 of the outlet 5 are preferably coated at least insofar as they are in contact with 118123 5. This increases the reliability of the equipment and improves the flow of material and reduces the need for maintenance. Depending on the material being treated, various known coating materials may be used, such as Chemflake special paint, 5 Polyglass VEF coatings or ceramic plates or Hardox wear plates, for example.

Figure 2 illustrates in more detail the operation of the mechanism of the inlet 5. At the mouth of the discharge opening 5 there is a hinged closing plate 14 at its upper edge, which opens 10 as the material 18 is pressed against it as the feed plate 3 rotates. The amount of material 18 coming out of the discharge opening 5 is controlled by the speed of rotation of the feed plate 3 and the opening of the closing plate 14 and the adjustable lower bead (not shown in Fig. 2). The opening of the shutter plate 14 is controlled by the interchangeable counterweights 15 attached thereto which tend to close the discharge opening 5. The minimum opening of the discharge opening 5 is controlled by the length of the wire 20 or the like connected to the support rod 19 of the counterweight 15. The cable 20 may also be directly connected to the counterweight 15.

Figure 3 shows another preferred embodiment. Therein, the amount of material 18 is controlled by a closing plate 14 similar to that of the mechanism of Figure 2. The opening of the shutter plate 14 is controlled by the spring 21 and the minimum opening ••• i 'is adjusted by means of the adjusting screw · * · * ··· * mounted on the edge of the discharge opening 5 and the adjusting screw 23. The counter piece 24 of the adjusting screw 23 is mounted on the side of the closing plate 14. The adjusting screw 23 may also be mounted so that it · leans directly against the closing plate 14 without a separate counter piece.

• · *: ** Here, the spring 21 is mounted between the shutter plate 14 and the edge of the discharge opening 5, • * ·: but it is to be understood that it may be located elsewhere, such as ··· * ···: with the shutter plate hinge 25.

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The mechanisms of Figures 2 and 3 can be combined and end up with similar types of solutions. It is essential that the mechanism allows the equipment to operate without clogging and is adjustable for minimum material yield.

Figure 4 illustrates in more detail the adjustment of the lower skirt 16 of the hopper 1. In the lower part of the hopper 1, a simple adjustment mechanism is constructed by means of threaded rods 25 and bolts 26, which can adjust the position of the lower skirt 16 in relation to the surface of the hopper 3. Also shown on the surface of the feed plate 3 is a rotary bar 13 and on the outside of the feed plate a lifting lug 12.

10

The invention has been described above by way of example only and the solutions presented therein are not limiting in any way. The actual scope of protection is defined by the appended claims.

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Claims (13)

An apparatus for processing powdered material (18), comprising an inlet funnel (1) provided with a challenge opening (5) for the material (18), a plate feeder (3) rotatable about its center, a drive for rotating the plate feeder (3), a razor blade (4) for guiding the material (18) from the plate feeder (3) and furthermore the apparatus comprises a v. shut-off plate (14) for the discharge opening (5) and a shut-off mechanism connected to the shut-off plate (14) , characterized in φ * "" that the shutdown mechanism comprises a counterweight (15) and a shaft (19) for the ··· * counterweight or a spring (21) and a regulating mechanism for the M1 · · * ··· * shutdown mechanism. 25 ·· • · 2. Apparatus according to claim 1, characterized in that the control mechanism is made up of a wire (20) or the like, a control screw (23) with bracket (22) or * 1 I: * · like. . ···. 1 • · • · * Apparatus according to any of the preceding claims 1 or 2, characterized in that round bars (13) are provided on the surface of the plate feeder (3). 10 118123 Apparatus according to any of the preceding claims 1-3, characterized in that the inner surface (17) of the feed hopper (1) and / or the feed hopper shut-off plate (14) is coated with ceramic or corresponding wear discs or a ceramic coating, paint or other similar coating. . Apparatus according to any of the preceding claims 1-4, characterized in that the scraper knife (4) is coated with ceramic or equivalent wear discs or a ceramic coating, paint or other similar coating. Apparatus according to any of the preceding claims 1-5, characterized in that the plate feeder (3) is connected to the drive device through its center. Apparatus according to any of the preceding claims 1-6; characterized in that on the outer periphery of the plate feeder (3) there are means, such as supporting ears (12) or the like, for hanging the plate feeder (3) in the * V: constructions in the lower part of a silo. • · m • · · · · · * Apparatus according to any of the preceding claims 1-7, * characterized in that there is an adjustable * · · lower skirt (16) at the lower part of the feed hopper (1). 25 '' • e * * A method for treating powdered material (18) a silo or similar container, the method comprising the steps of: · · *: - an inlet funnel (1) is arranged below a silos or corresponding IM inlet port, t > 30: Powdered material (18) is transferred by gravity from Siion to the feed hopper (1) and from there to the feed hopper (1) discharge port (5), 118123. 11; - a plate feeder (3) is arranged below the discharge opening (5), - the plate feeder (3) is rotated about its center point by means of a drive device, - a blade knife (4) is arranged on the plate feeder (3) for transferring the material (18) to the feed meter from the plate feeder (3). a shut-off plate (14) provided at its upper edge with a threaded rod is pivotally arranged at the discharge opening (5) of the feed hopper (1), characterized in that the method comprises further steps: the ridge (18) through the discharge opening (5) to the plate feeder (3) is controlled by the closing mechanism of the closing plate (14), - the closing plate (14) is adjusted to open sufficiently by means of a spring, counterweight etc., when a lump or the like ports in the output port, so that the device is not plugged in again. 15 Method according to claim 9, characterized in that the plate feeder (3) is rotated with a shaft arranged at its center. Method according to any of the preceding claims 9 or 10, M ··: V: 20 characterized in that the feed of the material (18) is controlled by the rotational speed of the X / · plate feeder (3) and / or the shut-off mechanism of the discharge opening ( 5) shut-off plate (14). * ·· ♦; ··· ♦ Method according to claim 11, characterized in that the shut-off mechanism is controlled by a control mechanism. • t A method according to any one of the preceding claims 9-12, ·· ·: V characterized in that the inner surface (17) of the feed hopper (1) and / or the ··· blades knife (4) surface and / or feed hopper (1) shut-off plate (14) is coated to reduce wear, corrosion and friction. ·····,