JPH0277530A - Method for charging raw material into sintering machine - Google Patents

Abstract

PURPOSE:To strengthen the grain segregation of raw material by dropping the raw material discharged from the tip of a movable sloping chute onto the tip of a fixed sloping chute to impart horizontal component of force to the raw material. CONSTITUTION:The movable sloping chute 20 capable of being freely lifted up and down is provided above the fixed sloping chute 15, the inclination of a tilting frame 12 is adjusted by a jack 11, and the position of the tip of the fixed chute 15 is adjusted. The raw material 28 to be sintered in a feed hopper 1 is discharged by a gate 2 and a drum feeder 3, transiently received by the movable chute 20, then parabolically dropped in the opposite direction, dropped onto the tip of the fixed chute 15 by gravity, and charged into a sintering machine pallet4 to form an ore bed. At this time, the component of force is generated in the raw material at the dropping point, the horizontal velocity VX is increased, hence coarse grains are sent far away, fine grains are positioned in the vicinity, and grain size segregation is promoted. The horizontal velocity VX is increased by increasing the inclination of the fixed chute 15 or by increasing the distance between the tips of the chutes 15 and 20.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention provides a raw material charging method for a sintering machine in which mixed raw materials for sintering are supplied from an ore feed hopper to a sintering pallet via a drum feeder and a sloping chute. It is related to.

<Conventional technology> Conventionally, in a sintering machine, various sintering raw materials are mixed in a predetermined ratio, charged into a feeding hopper and stored, cut out by a drum feeder from a lower discharge port, and delivered to a sintering machine pallet by an inclined chute. It is charged in layers on top.

The sintering raw material onto the sintering machine is transported to the lower layer by granulation and segregation between the particles of the sintering raw material by the inclined chute under the drum feeder for the purpose of improving the surface yield of the sintered ore and improving the air permeability during sintering. The coarse grains are charged in a segregated manner with the fine grains on top.

It has been proposed that an endless belt type charging device is used as the above-mentioned inclined chute, and the belt is moved in the direction opposite to the flow direction of the sintering raw material to promote the granulation effect (for example, see Utility Model Publication No. 47-9533). . Furthermore, an auto-cleaner type inclined chute has been proposed in order to prevent wet sintering raw materials from adhering to the inclined chute (see Japanese Patent Laid-Open No. 47707/1983).

<Problems to be Solved by the Invention> The endless belt type charging device described above has a large head difference between the lower end of the chute and the surface of the raw material layer on the barrellet, and therefore the length of the slope is short, resulting in segregation on the chute and the raw material slope. Not only is the effectiveness low, but the life of the belt is shortened due to belt surface abrasion and bending fatigue, and the unevenness of the belt disturbs material charging in the width direction of the pallet, which adversely affects operations.

For this reason, inclined chute systems have begun to be used again, but when charging sintering raw materials using this type of inclined chute, segregation on the pallet (more coke in the upper layer and fine grained raw material, less coke in the lower layer, In order to strengthen the raw material (with coarse particle size distribution), it is necessary to increase the horizontal velocity vector of the raw material discharge velocity at the exit tip of the sloping chute.However, in the conventional sloping chute method, sloping is used as a control factor for segregation. There is a problem that only the angle of the chute and the rotation speed of the drum feeder are controlled, and the control range is also small, and the horizontal velocity vector cannot be made too large, making it impossible to sufficiently strengthen segregation.

SUMMARY OF THE INVENTION An object of the present invention is to provide a raw material charging method for a sintering machine that can solve the problems of the prior art described above and increase the horizontal velocity vector of raw materials charged from a sloping chute. It is.

<Means for Solving the Problems> To achieve the above object, the present invention provides a raw material charging method for a sintering machine, which is arranged between a drum feeder and a sintering machine pallet in an ore feeding section of a sintering machine. By providing a movable sloping chute that can be freely elevated along the fixed sloping chute, and controlling the position of the movable sloping chute with respect to the above-mentioned fixed sloping chute up and down when loading raw materials into the sintering machine pallet, The method is characterized in that the raw material discharged from the tip of the movable sloping chute falls and collides with the tip of the fixed sloping chute.

Furthermore, in the raw material charging method for a sintering machine of the present invention, in addition to controlling the position of the movable sloping chute up and down with respect to the fixed chute, a tiltable armour plate is provided at the tip of the fixed sloping chute, and the angle of the armour plate is tilted and controlled. By doing so, it is preferable that the raw material discharged from the tip of the movable sloping chute fall and collide with an armor plate provided at the tip of the fixed sloping chute to control the charging angle of the raw material.

<Function> The raw material cut out from the drum feeder is once received by a movable throbbing chute and then dropped parabolically in the opposite direction, and an angle-adjustable armature is provided at the lower end of the fixed sloping chute, preferably at the lower end of the fixed sloping chute. After colliding with a plate, it is loaded onto a sintering machine pallet. Therefore, the horizontal velocity of the raw material charged into the sintering machine pallet increases due to the parabolic fall of the raw material using gravity, and the segregation of the raw material is strengthened.

<Example> Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a side view of a case where a raw material charging device 5 according to the raw material charging method for a sintering machine of the present invention is disposed between a drum feeder 3 and a pallet 4.

The raw material charging device 5 includes a cart 9 that can freely run on rails 8 fixed to a sintering machine frame 7, and a pin 10 attached to the bottom end of the cart 9.
A tilting frame 12 is rotatably supported by a tilting frame 12 and its upper part is tiltably connected by a tilting jack 11. The tilting frame 12 is guided by a roller 13 and a lifting jack 14 adjusts the tip position. A fixed sloping chute 15 is adjustable, and a cheno 17, which is guided by rollers 16 on the fixed sloping chute I5 and which resembles a rack, is linearly attached to the lower surface of the chute, and is driven by a drive motor 19 through a block 8 which is similar to a pinion gear. It consists of a movable sloping chute 20 that can be raised and lowered at will. 6
indicates the layer thickness adjustment device for the ore layer.

As shown in FIG. 1, the fixed sloping chute 15 and the movable sloping chute 20 are fixed together with the tilting frame 12 with the tilt angle adjusted by the jack 11 and the tip position of the chute 15 adjusted by the jack 14. be. Also movable sloping chute 20
is controlled so that the raw material 28 cut out from the drum feeder 3 falls onto the tip of the chute 20 and then falls and collides with the tip of the chute 15.

In this way, the sintering raw material 2 stocked in the ore feed hopper 1
8 is cut out by gate 2 and drum feeder 3,
- First, the raw material 28 is received by the movable sloping chute 20 and dropped parabolically in the opposite direction, and the fixed sloping chute 1
After colliding with the tip of the sintering machine pallet 4 using gravity, the ore layer is formed.

FIG. 2 is a side view showing another embodiment of the method of the present invention, in which a pin 2 is attached to the tip of the fixed sloping chute 15.
The figure shows an example in which an armour-brake (armor brake) 21 is installed through the armour. 22 is a cylinder for angle adjustment provided on the back side of the fixed sloping chute 15, and the armour plate 21
By expanding and contracting the cylinder 22, the angle is adjusted using the bin 23 as a fulcrum.

In FIG. 2, the raw material 28 cut out from the drum feeder 3 is once received by the movable sloving chute 20 and then dropped parabolically in the opposite direction.
After falling and colliding with an armor plate disposed at the tip thereof, it is loaded into the sintering machine pallet 4.

At this time, if the armor plate 21 is adjusted to the feeding position as shown by the dotted line, the horizontal component force due to the falling collision at the falling point will increase, the horizontal velocity Vx can be increased, and the particle size segregation of the raw material will be further promoted. It becomes possible to do so.

As mentioned above, in the present invention, the movable sloping chute 20
The point at which the raw material falls from the fixed sloping chute 15 to the fixed sloping chute 15 is the tip of the fixed sloping chute 15 or the armor plate 21. Therefore, a component force in the horizontal direction is generated on the material at the material falling point, and the horizontal velocity Vx increases. Among the raw materials, coarse particles have a large kinetic energy, so they are transported far away.
Fine grains are located close together, promoting grain size segregation.

FIG. 3 is a graph showing the relationship between the component force in the horizontal direction and the particle size segregation of the raw material expressed by the horizontal velocity Vx. It can be seen that increasing the horizontal velocity VX promotes the particle size segregation of the raw material.

In order to increase the horizontal velocity Vx, either the inclination angle of the fixed sloping chute 15 is increased or the movable sloping chute 20 and the fixed sloping chute 15 are combined.
It is controlled by increasing the distance between the leading edge of the image and the armor plate 2, either alone or in combination.
It can also be controlled by adjusting the angle of 1.

As shown in FIG. 4, the raw material that has been segregated on the fixed sloping shade 15 as described above rushes into the slope of the raw material layer inside the pallet 4, and stops on the slope starting from the finer raw materials that are in contact with the slope AB. There is a phenomenon in which coarse grains roll on slopes and segregate downward.

Furthermore, the investigation results shown in Fig. 5 show that the finer the particle size of the blended raw materials, the higher the carbon content, while the coarser particles have a lower carbon content. Fine grain.

If a lower layer (coarse particles) is formed, coke segregation (upper layer: high coke content, lower layer: low coke content) will also be naturally obtained.

When changing the inclination angle of the movable sloping chute 20 and the fixed sloping shade 15, the entire fixed frame 12 is tilted by raising and lowering the jack 11, and the gap between the lower end of the fixed sloping chute 15 and the ore surface is kept constant. In order to do this, the position of the fixed sloping chute 15 is adjusted using the lifting jack 14.

<Effects of the Invention> As explained above, according to the raw material charging method for a sintering machine of the present invention, the horizontal velocity of the raw material charged into the pallet increases due to the parabolic fall of the raw material using gravity, and the raw material Segregation is further strengthened. In addition, by controlling the angle of the armor plate to an appropriate position, segregation can be controlled arbitrarily, so stable operation of the sintering machine is maintained, and productivity is improved.

[Brief explanation of the drawing]

Fig. 1 is a side view showing an embodiment of the present invention, Fig. 2 is a partial side view showing another embodiment of the invention, and Fig. 3 is the horizontal velocity Vx of the raw material at the chute outlet end and the particle size segregation coefficient of the raw material. FIG. 4 is an explanatory diagram showing the particle size segregation situation, and FIG. 5 is a graph showing the relationship between the particle size and carbon content of the blended raw materials. l...Feeding hopper, 2...gate, 3...
Drum feeder, 4...Pallet, 5...Raw material charging device, 9...Dolly, 10...Bin,
1 work... tilting jack, 12... tilting frame,
14... Lifting jack, 15... Fixed sloping chute, 17... Rack lowering chain, 1B... Binion sprocket, 20... Movable sloping chute, 21... Armor plate, 22... Cylinder for armor plate. Patent applicant: Kawasaki Steel Co., Ltd. Figure 2 Figure 3 Figure 4

Claims (2)

[Claims] (1) A movable sloping chute that freely moves up and down along the fixed sloping chute installed between the drum feeder and the sintering machine pallet in the ore feeding section of the sintering machine is installed, and raw materials are loaded onto the sintering machine pallet. By controlling the position of the movable sloping short with respect to the fixed sloping chute to raise and lower the position of the movable sloping short, the material discharged from the tip of the movable sloping chute is caused to fall and collide with the tip of the fixed sloping chute. How to charge raw materials to the condenser. (2) A tiltable armor plate is provided at the tip of the fixed sloping chute, and by tilting and controlling the angle of the armor plate, the raw material released from the tip of the movable sloping chute is provided at the tip of the fixed sloping chute. 2. A method for charging raw materials into a sintering machine according to claim 1, wherein the charging angle of the raw materials is adjusted by causing the raw materials to fall and collide with an armor plate.