JPH0221759Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a charging device that prevents the adhesion of charging raw materials to the classification sieve and wear of the sieve in a sintering machine used in the steel industry. .

[Conventional technology]

Conventionally, in the steel industry, when producing sintered ore to be charged into blast furnaces, iron ore powder of approximately 10 mm or less is mixed with coke of an appropriate particle size and limestone powder as necessary, and then loaded into sintered pallets. A sintering machine is used that ignites the coke on the surface after entering the coke, burns the coke while sucking air downward, and uses the combustion heat to sinter the fine ore. In such a sintering machine, sintering progresses through the combustion of coke, so the supply of air to the sintered layer, that is, the quality of the ventilation of the sintered layer, is a major factor that influences the operation.

Normally, in downward draft sintering, when raw materials and coke are distributed with uniform particle size in the height direction of the sintered layer, the temperature increases toward the lower layer due to the characteristics of heat movement within the sintered layer, and the ventilation resistance increases. increase

As a means to prevent such drawbacks, there is, for example, a method for charging sintering raw materials disclosed in Japanese Patent Application Laid-Open No. 61-223136. In this method, as shown in FIG. 6, a large number of bars 51 are provided above a sintered pallet 50 extending in the pallet advancing direction, and at least one end of these bars 51 is provided at different levels.
A sintering raw material layer is formed by charging the sintering raw material through 1.

To explain this charging method in more detail, hopper 5
The sintering raw material 53 stored in the drum feeder 54 is cut out from the drum feeder 54, passes through the sloping plate 55, and falls onto the bar 51. In this case, the bars 51 are inclined so that the entrance side of the pallet 50 is at a lower level, and the tips of the bars 51 are uneven, so that the distance between the bars increases toward the tips. Therefore, among the sintering raw materials 53 that have fallen onto the bar 51, fine particles fall onto the pallet 50 from the base end of the bar 51, and coarse particles are charged into the pallet 50 from the tip. On the entering pallet 50, classified charging is performed with coarse grains in the lower layer and fine grains in the upper layer, and the falling energy of the raw material 53 is alleviated by the bar material 51, so that low-density charging is performed. An ideal filled layer 56 with low ventilation resistance is obtained.

[Problem that the invention attempts to solve]

By the way, the blended raw materials for sintering charged into these sintering machines usually contain quicklime and water, so that they tend to adhere to the bar material 51. In addition, since the distance between the bars 51 is small, 20 to 30 mm, if the raw material adheres to this, the distance between the bars will narrow, which will impede the classification performance of the raw material, and if this adhesion layer grows, the bar 51 will become a screen. It ceases to function as a. Furthermore, the raw material falling from the sloping plate always falls and collides with the bar 51 in a concentrated manner at a certain location, so that local wear occurs on the bar 51.

Therefore, in the past, in order to remove such deposits and replace the locally worn bar material 51, the sintering machine was periodically stopped to remove the deposits and replace the bar material. There were problems in that it was time-consuming to carry out the work in a different location, a lot of material was wasted, and production efficiency was reduced.

The present invention has been devised in view of the above-mentioned problems, and provides a raw material charging device that prevents the charged raw material from adhering to the bar material and effectively utilizes the bar material.

[Means for solving problems]

In order to solve the above problems, the present invention consists of a sieve in which a large number of bars are arranged above the pallet in the direction in which the pallet enters the pallet, and the tip sides thereof are stepped. In a raw material charging device for a sintering machine that performs classified charging, the proximal end of the bar is held by a chuck, and the proximal extension of the chuck is rotatable to a gear box via a bearing. A flexible rotary joint is provided on the proximal end of the chuck between the bearing and the gear box, and the gear box is provided with a rack that engages with a pinion gear provided on the proximal end of the chuck; A raw material charging device for a sintering machine is characterized in that this rack is connected to a reciprocating drive device.

[Effect]

The sieve is arranged so that the tips of the bars are serrated, narrow at the base end, and wide at the tip end, so that when the sintered raw material is dropped onto the base end of the sieve, the sintered material will fall. Among the raw materials, fine particles fall onto the pallet from the base end side, and coarse particles are charged into the pallet from the tip side, so that on the entering pallet, coarse particles are in the lower layer and fine particles are in the upper layer. Classified charging is performed.

During this operation, when the drive device is actuated to impart a swinging motion to the arm, this swinging motion is transmitted to the bar through the chuck as a reciprocating rotational motion. In this way, the bar repeats rotational motion even when the raw material is falling, so the falling raw material does not collide with just a part of the bar, but is dispersed over the circumference, preventing local wear of the bar. . Furthermore, since the rods are constantly rotating, raw materials do not adhere to the rods, and the sieves are kept clean.

〔Example〕

An embodiment of the present invention will be described in detail based on the drawings.

Fig. 1 is a side view of the main parts of the raw material charging device of the sintering machine, Fig. 2 is a side sectional view of the gear box of the bar rotation mechanism, and Fig. 3 shows the inside of the drive device and the bar rotation mechanism. FIG.

A sintering raw material charging device 1 is provided with a sieve 5 in which a bar 4 is arranged at an angle in a pallet advancing direction 3 above a pallet 2, and a sloping chute 6 is attached to the upper part of the base end side of the sieve 5. The sintering raw material 20 supplied from the drum feeder 11 falls onto the sieve 5 via the sloping chute 6.

A chuck 7 that holds the bar 4 is attached to a rotatable pedestal 9 via a pedestal 12.
The mounting angle of the bearing 10 is adjusted so that the tips of the plurality of bars 4 are serrated as shown in FIG. It is arranged so that it can be carried out.

A gear box 14 for rotating a rotating shaft 15 is fixed to the base 9 on the proximal extension of the bar 4, and the upper end of the bar 4 and the lower end of the rotating shaft 15 are flexible for transmitting rotational force. They are connected by a rotary joint 16, and the inclination angles of the rotary shafts 15 are all the same.

The rotating shaft 15 is rotatably held within a rotating bearing 19 of the gear box 14, and a pinion gear 17 is fixed coaxially with the rotating shaft 15, and this pinion gear 17 is slidable in a lower guide 22 with a driven rack 18.
and a drive rack 20 slidable within the guide 21.
The end of the drive rack 20 is further connected to a cylinder 24 via an end lever 23.

The sieve 5 is configured as described above, and the distal end side of the sieve 5 is serrated, and the proximal end side is narrow and the distal end side is wide. The grains fall onto the pallet 2 from the base end side, and the coarse grains are charged into the pallet 2 from the tip side, so on the pallet 2 as it enters,
Classified charging is performed with coarse particles in the lower layer and fine particles in the upper layer.

In order to rotate the bar 4 during this operation, the cylinder 24 is first driven, and this reciprocating motion becomes the rotation axis of the pinion gear 17, and then the bar 4 is rotated via the rotation shaft 15 and the flexible rotary joint 16. It becomes a rotational motion.

In this way, the raw material is charged while rotating the bar 4, thereby preventing local wear of the bar 4, and
It prevents raw materials from adhering to the rods 4 and keeps the sieve 5 clean.

As a method of imparting rotational motion to the bars 4, in addition to the above-mentioned mechanism in which the pinion gear 17 and the movable rack 20 are engaged, the rotation of the rotary drive shaft 25 is controlled by the pinion of each bar 4 as shown in FIG. A method of sequentially transmitting the signal to the gear 17 is also effective.

Next, a specific example of the present invention will be explained.

A sieve is constructed by arranging bars 4 with a diameter of 13 mm and a total length of 1000 mm, with a pitch of 18 mm in the width direction and a pitch of 63 mm in the height direction, with the tips arranged in a sawtooth shape as shown in Figure 4. As a result of dropping and charging the sintering raw material while rotating at a rotation/minute rate, almost no raw material adhered to the bar, and the bar 4 could always be kept clean.

[Effect of idea]

As explained above, according to the device according to the present invention, the bar is rotatable and the sintering raw material is dropped and charged while the bar is rotated by the drive mechanism, so that the fallen raw material is Instead of concentrating on a single part of the body and colliding, it is dispersed over the circumference,
Local wear of the bar is prevented, and the bar is also easy to remove, so the dropping point of the raw material can be moved as appropriate depending on the state of wear, allowing the bar to be used effectively and reducing material waste. be able to. In addition, since the rods are constantly rotating, raw materials do not stick to the rods, the sieves are kept clean, and normal classification and charging can be performed at all times, and the operating rate of the sintering machine is also high. Production efficiency will also improve over time.

[Brief explanation of drawings]

Figures 1 to 5 show an embodiment of the present invention, with Figure 1 being a side view of the main parts of the raw material charging device of the sintering machine, and Figure 2 being a side cross section of the gear box of the bar rotation mechanism. Figure, 3rd
The figure is a front view showing the inside of the drive device and the bar rotation mechanism, Figure 4 is a diagram showing the bars arranged in a sawtooth pattern, Figure 5 is a diagram showing an example of application of the present invention, and Figure 6 is a diagram showing an example of application of the present invention.
The figure is a side view of a conventional raw material charging device. 1...Raw material charging device, 2...Pallet, 4...
Bar material, 5... sieve, 6... sloping chute,
7...Chuck, 10...Bearing, 14...Gear box, 16...Flexible rotary joint, 17...Pinion gear, 18, 20...Rack, 24...Rack drive cylinder.

Claims (1)

[Scope of utility model registration request] A sintering machine in which a sieve is constructed by forming a sieve with the tips of a large number of rods arranged above the pallet in the direction of pallet entry, and the sintering raw material is dropped onto the sieve to be classified and charged onto the pallet. In this raw material charging device, the proximal end of the bar is held by a chuck, and the proximal end extension of the chuck is rotatably supported on a gear box via a bearing, and there is a gap between the bearing and the gear box. A flexible rotary joint is provided on the proximal extension of the chuck,
A raw material charging device for a sintering machine, characterized in that the gear box is provided with a rack that meshes with a pinion gear provided on the proximal extension of the chuck, and the rack is connected to a reciprocating drive device.