KR100435474B1 - Apparatus for charging sintering materials and multi roll-chute device used for it - Google Patents

Abstract

The present invention relates to a charging device for charging iron ore sintered blended raw materials, such as steel mills, while promoting the classification into the sintering machine bogie, more specifically to improve the sintered ore productivity and recovery rate by uniformizing the air permeability in the width direction of the sintered raw material layer The present invention relates to an improved sintering raw material charging device and a multi-roll chute device used therein.

The present invention relates to a charging device for charging iron ore sintered blended raw materials, such as steel mills, while promoting classification into a sintering machine cart, wherein the lower auxiliary inclined chute is mounted on the bottom of the final roll chute surface. ,

In a chute for charging iron ore sintered blended raw materials, such as steelworks, into the sintering machine cart to facilitate classification, a roll chute having a plurality of roll chutes, wherein the roll chute is formed in a circumferential direction with a bone or acid It provides a roll-type chute device for sintering raw material charging device characterized in that the structure is made so that the air can be directed to the center of the raw material layer sintering machine.

Description

Sintering raw material charging device and multi-roll chute device used for it {APPARATUS FOR CHARGING SINTERING MATERIALS AND MULTI ROLL-CHUTE DEVICE USED FOR IT}

The present invention relates to a charging device for charging iron ore sintered blended raw materials, such as steel mills, while promoting the classification into the sintering machine bogie, more specifically to improve the sintered ore productivity and recovery rate by uniformizing the air permeability in the width direction of the sintered raw material layer The present invention relates to an improved sintering raw material charging device and a multi-roll chute device used therein.

The width of a conventional sintering machine is considerably wide, 2-4 m, so that it is very difficult to load the raw material uniformly in the width direction. Particularly, particle segregation of the charges in the sintered raw material hopper, particle segregation during the discharge of this raw material, particle segregation due to the formation of adherent light in the charge chute, and particle fragments caused by the action of the sintering machine side wall without any such In general, there is a leaky phenomenon in which air is directed toward the side wall of the sintering machine by stones, and the sintering reaction proceeds rapidly toward the air sintering, which causes a non-uniform sintering reaction. have.

As a conventional method for preventing this, a method is proposed in which a raw material is charged into a sintering machine, and then rollers are formed on both sidewalls to squeeze the surfaces of the raw material on both sides, and the air flow is inhibited to suppress leakage. As disclosed in Japanese Patent Application Laid-Open Nos. 7-268496 and 9-184022, a method of forming a ventilation slit in the raw material layer for smoothing the air permeability at the center of the sintering machine is proposed such that the air is concentrated at the center.

In addition, there is a technique of controlling the opening and closing state of the door and uniformly charging the raw material by dividing the raw material discharged from the hopper of the sintering machine, but they usually require additional equipment, and this role is used by the structure of the charging chute. There is nothing to do.

In addition, in the charging device of Utility Model Application No. 1998-12123 shown in FIG. 1, a sintered raw material 100 in which iron ore powder is mixed with subsidiary materials and coke is charged into a sintered raw material storage tank 120, and this raw material is a drum feeder. By the action of the 150 through the raw material switch 130, 140 is supplied to the first roll-shaped chute 200 produced in a cylindrical shape, the raw material is again driven by the first roll-type chute (210) ) And the final roll chute 220 is configured to be charged into the sintering cart 180 through a plurality of roll chute.

However, this charging device has a three-stage cylindrical structure as shown in Fig. 3, and the roll-cleaner is easily installed on the back of the roll-type chute, greatly reducing the unevenness of the charge due to the formation of adhesion light. Segregation can be easily promoted by the action of, but the height from the final roll chute to the position where the raw material escapes and the height of the loading raw material in the sintering machine is high. The direction falling speed is too large and the effect of segregation loading is halved. In particular, the density of the charging raw material is increased, and thus the air permeability of the raw material layer is deteriorated.

That is, in the conventional charging device shown in FIG. 1, the first and second roll chute serve to guide the sintered raw material 100 to the final roll chute 220 while gradually changing the angle, where the final roll chute 220 ) Plays an important role, such as changing the drop direction of the particles and dispersing them and supplying them. This role is greatly influenced by the distance the particles contact from the roll chute surface.

Therefore, the diameter of the final roll chute must be considerably large so that the distance that the particles come into contact with the roll surface is large, and thus the particle flow can be effectively controlled. This means that the free fall height H of the particles leaving the final roll chute 220 becomes large, as shown in FIG. 2, and thus the particle dropping speed Vf and its vertical velocity at the loading material surface. It becomes larger, adversely affects the segregation of particles and is a major cause of impairing the breathability of the raw material layer.

That is, if the velocity of the particles deviated from the final roll chute 220 is Vo and the free fall velocity of the particles on the charged raw material surface is Vf, the particle velocity is greater than Vo due to the action of gravity in the vertical direction. The vertical velocity component and the incidence angle of the particles become large, which impedes segregation loading, which tends to deteriorate the breathability due to the vertical pressure loading. This phenomenon, in particular, there is a problem that increases as the free fall distance (H) increases. This is because the diameter of the final roll chute should be large in order to facilitate the control of the particles, but it is difficult to design a multi-roll chute charging device because the above problems are in a reverse interaction relationship.

The present invention is to solve the above conventional problems, the object is to improve the sintered ore productivity and recovery efficiency by uniformizing the air permeability in the width direction of the sintered raw material layer and the multiple sintered raw material charging device used therein The purpose is to provide a rolled chute.

1 is a block diagram showing a sintered raw material charging device using a multi-roll chute device according to the prior art;

Figure 2 is a schematic diagram showing the particle motion of the sintered raw material charging device using a multi-roll chute device according to the prior art;

3 is a block diagram showing a multi-roll chute device according to the prior art;

Figure 4 is a block diagram showing a sintered raw material charging device using a multi-roll chute device according to the present invention,

a) is a block diagram showing a lower secondary inclined chute;

b) is a block diagram showing a lower secondary slit bar chute;

5 is a schematic diagram showing the particle motion of the sintered raw material charging device using a multi-roll chute device according to the present invention,

a) is a block diagram showing a lower secondary inclined chute;

b) is a block diagram showing a lower secondary slit bar chute;

6 is a perspective view showing a multi-roll chute device according to the present invention;

7 is a configuration diagram showing a roll-type chute used in a multiple roll-type chute device according to the present invention,

a) is a schematic diagram of a rolled chute with a square section,

b) is a block diagram of a roll chute having a trapezoidal cross section.

Explanation of symbols on the main parts of the drawings

10 .... Roll chute 30 ..... Goal

32 .... Acid 100 .... Sintered Raw Material

120 ... Sintered material storage 150 .... Drum feeder

180 ... sintering machine trolley 200 ... first roll chute

210 ... second roll chute 220 .... final roll chute

300 ... lower secondary inclined chute 310 .... lower slit bar chute

The present invention to achieve the above object,

A charging device for charging iron ore sintered blended raw materials, such as steelworks, into the sintering machine bogie while encouraging classification, wherein the lower auxiliary inclined chute is mounted on the bottom of the final roll chute surface. All.

The present invention provides a charging device for charging iron ore sintered blended raw materials, such as steel mills, while promoting classification into a sintering machine truck, wherein a slit bar type chute is mounted to the bottom of the final roll chute surface. By providing.

In addition, the present invention to achieve the above object,

A roll chute device used for charging iron ore sintered blended raw materials, such as steelworks, into a sintering machine bogie while encouraging classification, wherein a roll chute having a plurality of roll chutes, wherein the final roll chute is circumferentially oriented in the roll chute. Or it is to provide a roll-type chute for sintering raw material charging device characterized in that the acid is formed in a cylindrical structure formed so that air can be directed to the center of the raw material layer sinter.

In addition, the present invention is to provide a roll-type chute device for sintering raw material charging device characterized in that the shape of the bone or acid is made of a quadrilateral cross section or trapezoidal cross section.

Hereinafter, the present invention will be described in more detail with reference to the drawings.

The present invention relates to a charging device for uniformly loading air permeability of a raw material layer while promoting classification of iron ore sintered blended raw materials such as steel mills into a sintering machine truck, and a roll type chute device used therefor.

The present invention is composed of a plurality of roll-type chute, such as the first roll chute 200 installed under the guide chute to drop the sintered raw material, the second roll chute 210 and the final roll chute 220 installed on the raw material falling side thereunder In the sintered raw material charging device having the roll type chute device 10, the lower auxiliary inclined chute 300 or the slit bar type chute 310 is installed at the raw material exit contact point P on the surface of the last final roll type chute 220. .

In the present invention, as shown in FIG. 4, the sintering raw material 100 discharged from the sintering raw material hopper 120 reaches the final roll chute 220 through the first and second roll chute 200 and 210 and the sintering machine ( When discharged to 180, the lower auxiliary inclined chute 300 or the slit bar chute 310 is further installed at the lower part of the final roll chute 220 on the raw material leaving point P as a contact point.

That is, according to the present invention, the lower auxiliary inclined chute 300 is installed at the lower end of the raw material leaving point P of the final roll chute 220, and the chute 300 chutes particles which have left the final roll chute 220 surface. It serves to guide the surface of the charging raw material along the inclined surface free fall distance (H) is adjustable by the length and angle of the lower secondary inclined chute 300.

In particular, the angle of incidence of particles deviating from the lower subsidiary inclined chute 300 may be effectively controlled as the inclined chute by rotating the inclined chute around the hinge axis 301 mounted on the top of the inclined chute. . This is a great advantage, such that it can effectively suppress the above problems by providing a lower auxiliary inclined chute 300 at the lower end while sufficiently expanding the diameter in order to fulfill the action of the final roll chute 220. In the case of installing the slit bar type chute 310 instead of the lower auxiliary inclined chute 300 has the similar effect as described above.

As described above, the present invention is a sintered raw material charging device using a multi-roll chute of the Utility Model Application No. 1998-12123 proposed by the present invention can easily remove the adhesion light during the charging process, it is possible to stably maintain the charging state of the raw material, In particular, despite the advantage of maximizing the dispersion of the separated particles at the rotational speed of the final roll chute, there were many difficulties in the design of the roll structure due to the problems presented above.

However, by additionally installing the lower auxiliary inclined chute 300 and the slit bar-shaped chute 310 presented in the present invention at the bottom of the final roll chute 220, it is possible to effectively solve all the problems while maximizing the function of the sintered raw material charging device. Therefore, there is an effect of improving the sintered ore productivity and recovery rate.

On the other hand, Figure 6 and Figure 7 shows a multi-roll chute device used in the sintering raw material charging device of the present invention.

The multi-roll chute device of the present invention is composed of a plurality of roll chute, such as the first roll chute 200, the second roll chute 210, the final roll chute 220, the lower end of the cylindrical final chute chute 220 It has a cylindrical structure in which valleys or acids are formed in the circumferential direction so that air can be directed to the center of the sintering material layer.

That is, in the present invention, as shown in FIG. 6, in the multi-layer roll chute charging device, the cylindrical final roll chute 220 is changed into a structure in which a plurality of valleys 30 or mountains 32 are formed in the circumferential direction on the roll surface. will be. Here, the shape of the valleys 30 or the peaks 32 may be made of a quadrilateral cross section as shown in (A) of FIG. 7 and a trapezoidal cross section as shown in (B). On both sides without (32), the raw material flows due to the charging effect as in the prior art, but in the center where the bone 30 is formed a lot, the raw material flows toward the bone 30, and the raw material flows toward the adjacent acid 32 so that the raw material flows a lot. The phenomenon in which the charged portion and the unloaded portion are alternated evenly occurs.

Therefore, as shown in FIG. 6, in the portion 40 where a large amount of raw material is charged on the surface of the charging raw material layer, an acid is formed and large particles flow into both sides 42 of the portion 40, which is uniform. By alternately rotating, portions in which the particles are loaded in the width direction of the sintering machine are sequentially formed.

Therefore, the larger the particle, the better the air permeability, and it can be uniformly intersected so that it can be charged so that the air is directed toward the center of the sinterer.

In this way, inducing particle segregation uniformly in the width direction of the sintering machine can suppress large-scale non-uniform charging phenomenon commonly occurring in the charging process of the sintering raw material, and for aeration or suppression of various parts proposed in the related art By utilizing the characteristics of the charging device without the addition of the device, it is possible to effectively cope with it, so that the effect of preventing the sintering, recovery rate and productivity degradation caused by the heterogeneous charging is obtained in advance.

As described above, in the present invention, by changing to a final roll chute 220 having a cylindrical structure having a valley 30 or an acid 32 formed on a surface thereof, the air is charged to the center of the sintering material layer. In the present invention, by the action of the final roll-shaped chute 220 formed on the surface of the bone 30, a lot of raw material flows to the surface with the bone 30, and less flows toward the other side, so that the amount of raw material in the sintering machine width direction sequentially , And alternately charge the less, and in particular concentrated in the center of the valley 30 of the final roll chute 220, as shown in Figure 6, the air can be directed toward the center of the installation of additional devices Effectively manage the breathability of the raw material layer. Therefore, the air permeability of the raw material layer can be made uniform, and the sintered ore productivity and recovery rate can be effectively improved.

As described above, the sintered raw material charging device of the present invention is the final sintered raw material loading device by adding the lower auxiliary inclined chute 300 or the slit bar type chute 310 to the lower end of the final rolled chute 220 ( 220) The recovery angle of the sintered tube can be improved by effectively improving the problems such as the free fall height when the raw material is removed from the surface and the drop angle is high due to the high free fall height. And productivity can be easily improved.

Therefore, the present invention lowers the angle of the feed direction of the sintered raw material supplied to the sintering machine and decreases the drop with the raw material surface in the sintering machine, effectively increasing the classification effect and improving the air permeability of the raw material layer. That is, when the sintered raw material is charged into the sintering tank bogie, the segregation of the raw material into the upper and lower layers can be more effectively promoted, thereby eliminating the nonuniformity of the upper and lower calorific values during the sintering process and improving the air permeability of the raw material layer.

In addition, the multi-roll chute device of the present invention effectively changes the cylindrical final roll chute 220 into a structure in which a plurality of valleys 30 or acids 32 are formed in the circumferential direction on the roll surface, and effectively breathable in the width direction of the sintering machine. By uniformly improving the air permeability of the entire sintered raw material layer, the recovery rate and productivity of the sintered ore can be improved.

Claims (6)

A charging device for charging iron ore sintered blended raw materials, such as steelworks, into the sintering machine cart while encouraging classification, wherein the lower auxiliary inclined chute is mounted on the bottom of the final roll chute surface. A charging device for charging iron ore sintered blended raw materials, such as steelworks, into the sintering machine cart while encouraging classification, wherein a slit bar type chute is attached to the lower portion of the final roll chute surface. The sintering raw material charging device according to claim 1 or 2, wherein the chute is configured to be able to change its inclination angle by being rotatable about a hinge axis (301) at the upper end side thereof. The sintering raw material charging device according to claim 1 or 2, wherein the chute is installed at a lower end of the raw material leaving point P of the final roll chute 220 or at a lower end of the raw material leaving position of the final roll chute 220. . In a roll type chute having a plurality of roll chutes, which is used in a charging device for charging iron ore sintered blended raw materials, such as steelworks, into the sintering machine cart to facilitate classification. Roll-type chute device for sintering raw material charging device characterized in that the final roll-shaped chute of the roll-type chute made of a cylindrical structure formed with valleys or acid in the circumferential direction so that air can be directed to the center of the raw material layer of the sintering machine. The roll-type chute device for sintered raw material charging device according to claim 5, wherein the valley or acid has a quadrangular cross section or a trapezoidal cross section.