JPS6244786Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a heat-resistant vibrating sieve for sieving out coarse lumps contained in the high-temperature output of a heating furnace or firing furnace such as a rotary kiln.

The high-temperature output discharged from a rotary kiln etc. often contains coarse lumps produced by fusion or the like in the furnace, in addition to powder particles or pellets having a particle size suitable for the purpose. This coarse mass needs to be sieved and treated separately, but in the past, only a rostre (grate) was installed on the outlet side of the furnace, so the coarse mass accumulated on the rostrum etc. was manually removed. Therefore, there was a problem that it was difficult to ensure the safety of this work and it was inefficient.

In addition, in order to eliminate such inconveniences, a removal device has been disclosed in which a pusher is provided that reciprocates along the upper surface of the rostol to intermittently remove the coarse lumps accumulated on the rostol.
56-30464), this is because a pusher with a complicated structure is provided separately from the rooster, making the entire equipment complex and expensive. In pushers, there is a risk that the fine grains that have accumulated on top of the large lumps will be discharged together with the large lumps, so it cannot be said that the sieving effect is sufficient.

Furthermore, Japanese Utility Model Application No. 56-122096 discloses a rotary kiln ore discharge device in which a large number of rolls are arranged in place of the rottle, and the rolls are rotated in the same direction to discharge the coarse lumps accumulated thereon. However, in this device, the mechanism is such that the coarse lumps are discharged by the rotation of the rolls, so large-sized coarse lumps are fed and discharged, but medium-sized coarse lumps that are not very large are transported between the rolls. It tends to accumulate in between. In order to prevent this, it may be possible to provide ribs or the like on the roll, but in that case, the problem arises that the ribs are easily damaged. Furthermore, rolls have the disadvantage that they tend to become unrotatable when bent due to the load or impact of a large mass.

The purpose of the present invention is to provide a heat-resistant vibrating sieve that has a completely different configuration from the conventional one and can effectively sieve coarse lumps contained in high-temperature products produced by rotary kilns, etc., without the above-mentioned drawbacks. .

An embodiment of the present invention will be described in detail below.

FIG. 1 is a longitudinal sectional view of the heat-resistant vibrating sieve of the present invention installed at the lower part of the discharge hood of a rotary kiln for reduction roasting, and FIG. 2 is a plan view thereof. FIG. 3 is an enlarged sectional view of the sieving rod. In the figure, 1 is a rotary kiln, and 2 is a discharge hood provided on the side of the rotary kiln 1 from which high-temperature products are discharged. Reference numeral 3 denotes a sieving rod provided across the lower part of the discharge hood 2. A plurality of sieving rods 3 are arranged in parallel at intervals suitable for the purpose of sieving. is inclined in the axial direction, and its upper end is connected to the annular member 4.
is fixed to. The annular member 4 is slidably and rotatably attached to the outer periphery of a disc 6 which is fixed eccentrically in alternate directions to a straight rotating shaft 5 provided horizontally outside the discharge hood 2. Further, the lower end of the sieving rod 3 is placed on the upper surface of a pedestal 7 formed integrally with the lower part of the discharge hood 2, and is slidably supported. As shown in FIG. 2, the rotary shaft 5 is provided with a pulley 8 at one end, and the motor 1
It is designed to be rotated by 1. In addition, a rod 3 is attached to the top of the pedestal 7 of the discharge hood 2.
A door 12 is hinged to the discharge hood 2 at its upper edge so that the door 12 can be opened and closed so that the coarse lumps sieved by the sieve can be discharged. The lower half of the door 12 constitutes a small door 12' whose upper edge is hinged so that the entire door 12 does not need to be opened when relatively small coarse pieces are discharged.

Further, as shown in FIG. 3, the sieving rod 3 is formed hollow, and inside thereof is a central partition plate 13 fixed to the upper end of the rod 3 and extending toward the lower end.
A water supply port 14 is provided on the lower side near the upper end of the rod 3, and the cooling water supplied from the water supply port 14 flows to the upper side near the upper end of the rod 3 so as to cool the entire hollow part. Drain port 15 provided
It is becoming more and more excreted. 16 is a flexible hose for water supply connected to the water supply port 14. (See Figure 1) In this example, the output of the rotary kiln is put into a water tank and cooled, so the cooling water of the rod 3 is made to flow directly onto the top surface of the rod 3. When using under conditions where water should not come into contact with objects, a flexible hose can also be connected to the drain port 15 of the rod 3 to guide the waste water to the outside of the hood or the like.

Next, as the rotating shaft 5 rotates, the sieving rod 3
The movement will be explained with reference to FIGS. 4a to 4d.
When the rotating shaft 5 rotates, the disk 6 fixed to the shaft performs an eccentric rotational movement. Since the annular member 4 to which the upper end of the rod 3 is fixed can slide and rotate independently of the disc 6, the rod 3 can move up and down as shown in FIGS. Performs movements that are a combination of forward and backward movement. At this time, since adjacent rods are connected to disks eccentric in opposite directions, their vertical and longitudinal movements are performed in opposite phases.

Next, the action of the heat-resistant vibrating sieve of the present invention will be explained. A high-temperature product containing a mixture of coarse lumps and powder particles is continuously discharged from the rotary kiln 1 and falls onto a sieving rod 3. The sieving rods 3 perform a combination of vertical and longitudinal movements as the rotary shaft 5 rotates, and the powder and granules in the high-temperature product fall from between the rods 3 to sieve out the coarse lumps. is moved toward the lower end of the slanted sieving rod and discharged from the hood 2 through the door 12. In that case, the sieving rods 3 are water-cooled so they can withstand high temperatures, and each rod moves in a combination of vertical and back-and-forth movements in opposite phases, making for effective sieving. This can prevent particulate matter from being discharged together with coarse lumps. In addition, as a mechanism for transmitting motion to the sieving rod 3, unlike conventional vibrating sieves, a crankshaft is not used, but a mechanism capable of withstanding heavy loads consisting of a straight rotating shaft and an eccentric disk is used. Therefore, there is no problem even if a large lump of heavy weight falls onto the sieving rod 3, such as when a rotary kiln wall deposit that has grown on the inner wall is peeled off and discharged.

As explained in detail above, the heat-resistant vibrating sieve of the present invention can withstand high temperatures and heavy loads, can effectively sieve coarse lumps in high-temperature products produced in heating furnaces and calcining furnaces, and has a simple structure. Since it is relatively simple, it is easy to maintain and is suitable for actual operation, which is a great effect.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view showing an embodiment of the heat-resistant vibrating sieve of the present invention, and FIG. 2 is a plan view thereof. FIG. 3 is an enlarged sectional view of the sieving rod, and FIG. 4 is a diagram showing the movement of the sieving rod. Explanation of symbols, 1...Rotary kiln, 3...
Sieving rod, 5... rotating shaft, 6... disc, 7...
...cradle, 11...motor.

Claims (1)

[Scope of utility model registration request] It has a plurality of sieving rods that are inclined in the axial direction and are hollow inside and have cooling water inlets and drains, and the upper ends of the rods are alternately eccentric in opposite directions and straight and identical. The rods are slidably and rotatably connected to the outer periphery of a disk fixed to a rotating shaft, and the lower end is slidably supported on a pedestal, and the rods alternately move up and down and back and forth in opposite directions. A heat-resistant vibrating sieve constructed as follows.