JPH0410559Y2 - - Google Patents

Description

[Detailed explanation of the idea]

Industrial application field This invention relates to a raw material supply device for a sintering machine, which supplies sintering raw materials to improve the air permeability of the raw material layer on the pallet by segregating coarse grain raw materials in the lower layer and fine grain raw materials in the upper layer. Regarding equipment. Technical background A sintering machine is a device that ignites the surface of a raw material layer charged on a pallet in an ignition furnace and progresses sintering while suctioning from below with an exhaust fan.
Focusing on the height of the raw material layer, the upper layer lacks heat and the lower layer has too much heat. This is because the upper layer is rapidly cooled by the cold air sucked in from above as the coke in the raw material burns.
This is because the temperature of the lower layer is gradually raised as the firing of the upper layer progresses, the coke is burned after sufficient preheating, and even after the combustion is completed, it is gradually cooled by the residual heat of the upper layer. Therefore, when charging raw materials into the sintering machine pallet, it is necessary to segregate fine grain raw materials in the upper layer and coarse grain raw materials in the lower layer. Prior Art A conventional sintering raw material supply device basically includes a surge hopper, a roll feeder provided at the bottom of the surge hopper, and a roll feeder that transfers the sintering raw material cut out from the roll feeder onto a sintering machine pallet. A common method is to segregate the sintering raw material according to particle size by utilizing the slope classification effect of the raw material. As the ore feeding chute, there are a deflector chute in which a liner made of cast steel, stainless steel, ceramics, etc. is pasted on the top surface of an iron plate, and the one described in FIGS. 1 and 2 of Japanese Patent Application Laid-Open No. 149880/1980. Further, as means for obtaining a better segregation effect, there are a two-stage charging system and a slit bar type charging device. 2
The stage charging system consists of two systems: raw material blending and charging. Two types of raw materials with different coke blending ratios, raw material particle sizes, etc. are prepared and charged in two stages on the sintering machine pallet. This is a method to do so. The slit bar charging device uses the ore feed chute as a slit bar to classify the raw material into coarse particles and fine particles before charging. Problems to be solved by the invention In the conventional sintering raw material supply device that simply rolls and falls on the feed chute, the blended raw materials adhere and grow on the surface of the deflector chute in 30 to 40 minutes, resulting in an unstable supply state. It becomes stable. Therefore, variations in air permeability within the raw material layer on the pallet become large, and temperature disturbances occur within the sintered raw material layer on the pallet, making the operation unstable. In addition, in the case of ceramic liners, adhesion of compounded raw materials can be prevented, but since there is very little rolling of the raw materials and they slide down, the permeability within the raw material layer on the pallet deteriorates due to the destruction of pseudo particles or a reduction in classification. , there is a problem of a significant decrease in productivity. In addition, the two-stage charging method requires two systems each for blending and granulating raw materials and two raw material charging devices, which poses a problem of high equipment costs. Also,
Slit bar type charging equipment requires an attached ore removal device to prevent material from accumulating on the run-up plate, slit bar, and deflector chute, and when a deflector chute is also used, the material surface and raw material cutting roll flow are This method requires a large amount of space between the feeder and the feeder, and a means for creating the space must be provided, and as with the two-stage charging method, the equipment cost is high. Means for Solving the Problems This invention is a means for solving the above-mentioned problems of the prior art, in which the ore feed chute of a raw material supply device consisting of a surge hopper, a roll feeder, and an ore feed chute is connected to a substrate and the upper surface of the substrate. The proposed device consists of an expanded metal polymerized to
One of the features is that it uses a 500mm extension. Here, the Uras motor refers to a motor having a vibration function, and the expanded metal refers to a woven mesh-like perforated plate. Also, place the expanded metal 100 to 500
The reason for increasing the length by mm is to further enhance the classification effect between coarse and fine raw materials. Function Next, the function of this device will be explained based on FIGS. 1 to 3. Fig. 1 is a schematic diagram showing a sintering raw material supplying device according to this invention, Fig. 2 is a schematic diagram showing a case in which an expanded metal longer than the end of the inclined surface of the substrate is used in the same device, and Fig. 3 is a schematic diagram showing a case in which expanded metal is used in the same device as above. It is a partially enlarged view of metal. In FIG. 1, 1 is a surge hopper, 2 is a roll feeder, 3 is a substrate, a deflector chute consisting of 3-1 and expanded metal 3-2, 4 is a Uras motor, and 5 is a support for supporting the Uras motor. The stand, 6 is a holder for holding the upper part of the deflector chute 3 on the support stand 5, and 7 is a sintering machine pallet. The deflector chute 3 has a mechanism in which vibration is applied by a Uras motor 4. As shown in FIG. 3, the expanded metal 3-2 consists of a perforated plate having a large number of holes 3-3. In the above apparatus, the sintering raw material 8 stored in the surge hopper 1 is cut out by the roll feeder 2, and the substrate 3-1 and expanded metal 3-1 are cut out by the roll feeder 2.
It rolls down the upper surface of a deflector chute 3 consisting of 2 and is charged onto a pallet 7 while being classified. The sintering raw material 8 that has fallen onto the deflector chute 3 is transferred to the expanded metal 3- on the upper surface of the substrate 3-1.
The hole 3-3 of No. 2 is filled to form a raw material. Thereafter, the blended raw materials roll and fall on this raw material layer, so the rolling action is increased by the frictional resistance on the raw material surface, and the classification effect is increased. Therefore, on the pallet 7, the fine-grained raw material 8-1 is segregated in the upper layer and the fine-grained raw material 8-2 is segregated in the lower layer, and as a result of improving the air permeability in the layer, productivity is significantly improved. However, if left as is, the adhering raw material will grow in about 40 to 50 minutes and the rolling and falling state of the raw material will become unstable.
Vibration is applied to the deflector chute 3 by the Uras motor 4 for 40 seconds at minute intervals. Due to this vibration, the adhering material that has begun to grow falls and returns to a state where the holes 3-3 of the expanded metal 3-2 are simply filled, so that a stable rolling and falling state can be maintained at all times. The vibration time and vibration interval of the deflector chute 3 may be appropriately set depending on the blending situation of the sintering raw materials. In addition, as shown in Fig. 2, when an expanded metal 3-4 that protrudes 100 to 500 mm from the end of the inclined surface of the substrate 3-1 is used, the top of the raw material layer formed by being filled with the sintered raw material is used. As it rolls and falls,
Further, the extended part of the expanded metal 3-4 classifies the fine raw material 8-1, which falls through the holes 3-3 of the expanded metal, and the coarse raw material 8-2, which falls through the expanded surface and becomes fine. Granular raw materials are segregated and charged into the upper layer, and coarse grain raw materials are charged into the lower layer. Example 1 In the sintering raw material supply device shown in Fig. 1, a deflector was prepared by pasting expanded metal with a thickness of 6 mm and a mesh size of 80 x 30 mm on a substrate made of a 25 mm thick cast steel liner pasted on an iron plate. Shoot and
Using 0.4KwH x 2 Uras motors, Table 1
The results of charging the sintering raw materials shown in the figure for one month are as follows.
Table 2 shows a comparison with the case using a conventional deflector chute. As is clear from Table 2, this invention reduced the variation in air permeability of the sintered raw materials and significantly improved productivity. Regarding quality, variations in rotational strength and basicity were greatly reduced. Furthermore, the number of cleaning times for the deflector chute has also been reduced to zero.

[Table] * Outside numbers

[Table] Example 2 Table 3 shows the results of the same operation as in Example 1 using the expanded metal that was 150 mm longer than the end of the inclined surface of the substrate in the apparatus of Example 1.
Shown below. As is clear from Table 3, by using expanded metal with an extended lower end, air permeability, productivity, and quality were all improved.

[Table] Effects of the invention As explained above, according to this invention, the classification effect of the sintering raw material can be further enhanced.
It is possible to reduce variations in air permeability of sintered raw materials, and improve both productivity and quality. Furthermore, since the device is simple in structure, it has the effect of reducing equipment costs.

[Brief explanation of the drawing]

Fig. 1 is a schematic diagram showing a sintering raw material supply device according to the invention, Fig. 2 is a schematic diagram showing another embodiment of the same device, and Fig. 3 is a partially enlarged view showing expanded metal in the same device. . 1... Surge hopper, 2... Roll feeder, 3... Deflector chute, 3-1... Board, 3-2, 3-4... Expanded metal, 3
-3... Hole, 4... Eurus motor, 7... Sintering machine pallet, 8... Sintering raw material, 8-1... Fine grain raw material, 8-2... Coarse grain raw material.

Claims (1)

[Scope of claim for utility model registration] (1) Consisting of a surge hopper, a roll feeder provided at the bottom of the surge hopper, and an ore feed chute that rolls and drops the sintering raw material from the roll feeder onto the sintering machine pallet. The raw material supply device is characterized in that the ore feed chute is composed of a substrate and an expanded metal polymerized on the upper surface of the substrate, and the upper part of the ore feed chute is attached to the Uras motor via a holder and a support base. A supply device for sintering raw materials. (2) The sintering raw material supply device according to claim 1, wherein the expanded metal has a length extending 100 to 500 mm from the end of the inclined surface of the substrate.