KR200238075Y1 - Functional pelletizer for increased pellet quality and recovery - Google Patents

Abstract

The present invention relates to a multifunctional pelletizer capable of increasing the quality and recovery of pellets. More specifically, the raw material for pellet production is not crushed in advance in the steelmaking process, and fine iron ore and iron dust (dust) The present invention relates to a multifunctional pelletizer for increasing the quality and recovery of pellets which can be improved while retaining the sorting function, while increasing the granularity and strength of the pellets during the manufacture of pellet molding.

The present invention is a drum having a cylindrical drum member in which raw material for pellet production is mixed with 65 to 95% of iron dust of less than 1mm in size and 0 to 20% of iron ore of less than 10mm in cement and 5 to 15% of cement-based materials. part; A powder coating part having a plate-shaped lifter formed in a circumferential direction on an inner circumferential surface thereof to improve a droplet ratio of the raw material; A cylindrical strength improving part which is continuous to the powder coating part and increases the strength of the raw pellet molded from the raw material; A sorting unit formed on the outer circumferential surface of the screen net which is continuous to the strength enhancing unit, pellets having a predetermined size or more are transferred to the product belt, and pellets having a predetermined size or less are dropped onto the return belt on the lower side; And a drive unit having a chain on an outer circumferential surface of the strength enhancing unit and having a motor for driving a reducer connected to a gear engaged with the chain. 2. The multifunctional pelletizer for increasing the quality and recovery of pellets is provided. .

Description

Multifunctional pelletizer for increasing pellet quality and recovery

1 is a side view of a disk pelletizer according to the prior art.

2 is a plan view of a disk pelletizer according to the prior art.

3 is a pellet manufacturing process flow chart combining the multi-functional pelletizer and the disk pelletizer according to the present invention.

4 is a perspective view of the multifunctional pelletizer according to the present invention.

5 is a cross-sectional view showing a functional part constituting the multifunctional pelletizer according to the present invention,

(a) is a longitudinal cross-sectional view showing the powder coating of the multifunctional pelletizer.

(b) is a longitudinal sectional view which shows the strength improvement part of the multifunctional pelletizer.

(c) is a longitudinal cross-sectional view which shows the sorting part of a multifunctional pelletizer.

* Explanation of symbols for main parts of the drawings

1: Multi-function pelletizer 1a: Drum member

100: disk pelletizer 10: drum portion

11: powder coating (coating) 11a: lifter (lifter)

12: strength improvement unit 13: selection unit

13a: screen network 14: return belt

20: drive unit 21: chain

22: gear 24: motor

The present invention relates to a multi-functional pelletizer (pelletiser) that can increase the quality and recovery rate of the pellet (pelletiser), more specifically, in the steelmaking process, without grinding the raw material for pellet production in advance, fine iron ore and iron dust (dust) The present invention relates to a multifunctional pelletizer for increasing the quality and recovery of pellets, which can improve the granulation and strength of pellets during pellet forming production, while maintaining the sorting function.

In general, the raw material for pellet production used in the steelmaking process uses a raw material having a very small particle size of 325 mesh having a certain size of 0.044 mm or less in the particle size. In order to do so, it is necessary to install a crusher capable of performing crushing processes such as wet crushing and dry crushing. That is, the wet crushing is performed by adding the raw material and water into the grinding mill for crushing, and then separating the crushed raw material and water by using a thicker and disk filter equipment. Dry crushing is to crush only the raw material for pellet production without water in the grinding mill for crushing.

On the other hand, conventionally, as described above, in order to manufacture non-fired pellets after grinding the raw material for pellet production into fine granules beforehand, a disk pelletizer as shown in FIGS. 1 and 2 is used. Alternatively, a plurality of pellets were prepared and manufactured.

The disc pelletizer 100 is equipped with a rotary gear 102 at the rear of the disc-shaped disk 101, a reduction gear 104 and a motor capable of rotating the drive gear 103 engaged with the rotary gear 102. On the other hand, the disk is equipped with an anti-scrap scraper 106 and a water spray 107 on its inner surface to form and manufacture pellets while rotating in the direction of the arrow.

However, in order to mold the pellets using the conventional disk pelletizer 100 as described above, since the installation of a crusher for crushing the raw material for preparing a separate pellet in advance is necessary, a large working space is required, and a dry type is required. In the case of crushing, there is a problem in that a separate dust collecting facility is added to prevent scattering of dust generated, while pellets manufactured by the disc pelletizer 100 may be assembled due to non-uniform assembly. There was a problem in that the strength is low, the particles are differentiated during pellet transport or charging into the furnace.

Therefore, the present invention has been devised to solve the above problems, the purpose of which is a separate shredding equipment and the fine iron-containing dust generated in the steelmaking process without the process of pre-crushing the raw material for pellet production and By forming and manufacturing iron ore into non-fired pellets, the space occupied by the equipment is minimized, the reduction rate of the prepared pellets is easily reduced at low temperatures, and the quality and recovery rate of the pellets can be improved to improve the strength and recovery rate. To provide a multifunctional pelletizer.

The present invention devised to achieve the above object, in the pellet manufacturing equipment for producing pellets used in the steelmaking process, 65 to 95% of iron-containing dust with a certain particle size of 1mm or less, and 0.1 to iron ore of 10mm or less constant particle size A drum unit having a cylindrical drum member in which 20% of cement is mixed with 5 to 15% of cement, and the raw material for pellet production is transported to the inside. part; A cylindrical strength improving portion which is continuous to the powder coating portion and increases the strength of the raw pellet molded from the raw material; A sorting unit formed on the outer circumferential surface of the screen net which is continuous to the strength enhancing unit, pellets having a predetermined size or more are transferred to the product belt, and pellets having a predetermined size or less are dropped onto the return belt on the lower side; And a bulb having a chain on an outer circumferential surface of the strength enhancing unit and having a motor for driving a reducer connected to a gear engaged with the chain to rotate the drum member in one direction. By providing a multifunctional pelletizer for.

Hereinafter, with reference to the accompanying drawings will be described an embodiment of a multifunctional pelletizer for increasing the quality and recovery of the pellets according to the present invention in more detail.

3 is a flowchart illustrating a pellet manufacturing process combining a multi-functional pelletizer and a disk pelletizer according to the present invention, and FIG. 4 is an overall perspective view of the multi-functional pelletizer according to the present invention, and FIG. 5 (a) (b) (c) Figure is a cross-sectional view showing each functional part constituting the multifunctional pelletizer according to the present invention.

The multifunctional pelletizer 1 according to the present invention is an apparatus for molding and manufacturing non-fired pellets used as raw materials for steelmaking, and the raw materials for producing the pellets have a specific particle size generated in the steelmaking process, dusts of 65 mm or less of 1 mm or less. It is a mixture of 95% and 0.1-20% of iron ore with a certain particle size of 10mm or less and 5-15% of cement-based at a certain ratio, and by curing these raw materials through the first and second pelletizing processes, non-plastic pellets can be produced. will be.

At this time, the pelletizer used in the primary pelletizing process is a conventional disk pelletizer 100 as shown in FIG. 1, and the multifunctional pelletizer 1 according to the present invention is a secondary pellet. It is operated in the aging process, the drum pellet 10, the powder coating 20, to improve the dripping rate of the raw material insufficiently assembled in the disk pelletizer 100, and to increase the assembly and strength, It is composed of the strength improving unit 30, the sorting unit 40 and the drive unit (50).

That is, the drum unit 10 is composed of a cylindrical drum member 11 having a diameter of 1,500 to 2000 mm, the raw material is passed through the first pelletizing from the disk pelletizer 100 to the inside. . In addition, the drum unit 10 is functionally divided into a powder coating unit 20, strength improvement unit 30 and the sorting unit 40, the powder coating unit 20 is the first pelletizing In order to improve the spot ratio of the raw material that has been processed, a predetermined height (H), preferably 1 to 10 mm plate type lifter (21) in the circumferential direction, is fixed on the inner circumferential surface of the cylinder. , Preferably it is provided with a plurality of 3 to 60cm.

In addition, the strength improving portion 30 continuous to the powder coating portion 20 increases the strength of the raw material, which is vulnerable to the strength surface, and the sorting portion 40 continuous to the strength improving portion 30 has its outer peripheral surface. It is composed of a screen net 41 formed of a predetermined size of the mesh, the lower side is provided with a return belt 61 for recovering the pellets passing through the screen net 51 to the disk pelletizer 100, One end of the sorting unit 40 for discharging the pellet of the desired size is equipped with a product belt 62 for conveying the finished pellet finished product.

On the other hand, the drive unit 50 for driving the drum member 11 in one direction rotation at a constant speed for the pelletizing of the raw material is provided with a chain 51 on the outer peripheral surface of the strength improvement unit 30, the chain ( It is equipped with the reduction gear 53 equipped with the gear 52 engaged with 51, and the motor 54 connected to the said reduction gear 53 is comprised.

Hereinafter, the operation and effects of the multifunctional pelletizer for increasing the quality and recovery of the pellets according to the present invention will be described in detail.

That is, the multifunctional pelletizer 1 for secondary pelletizing the insufficiently pelletized raw material as the disk pelletizer 100 is driven by the motor 54 of the driving unit 50. At the same time as to rotate in one direction, by the lifter 21 in the rotating powder coating portion 20 to improve the droplet ratio of the raw material to maximize the pelletizing effect of the finely divided raw material that did not participate in the pelletizing.

Subsequently, the raw pellets that have passed through the powder coating part 20 are formed in non-fired pellets having a certain strength by increasing their density in the rotating strength enhancing part 30 so as to strengthen the bonding force. Subsequently, the pellets manufactured by molding with a certain strength are transferred to the sorting unit 40 having the screen net 41. The pellet having a small particle size passes through the screen net 41 and returns as the return belt 61. Recovered and sent to the disk pelletizer 100, pellet finished product of more than the target size is transferred to the product bet 62, it is possible to produce a pellet product of excellent quality.

EXAMPLE

TABLE 1

TABLE 2a

TABLE 2b

Table 1 shows the raw material composition ratio of the raw material for pellet production used in the multifunctional pelletizer 1 of the present invention, Table 2a is the ratio of the addition of the cement-based binder added to the raw material for pellet production in a certain ratio, preferably 15% Is a component analysis result of the molded pellet, and Table 2b shows the component analysis result of the molded pellet when the amount of the cement-based binder is 5%.

Here, the A type and the B type is a pellet produced by using a conventional single disk pelletizer 100 and a plurality of disk pelletizer 100 of the conventional pellet manufacturing raw materials that require a pre-crushing process, respectively. , Type C is a pellet manufactured by forming a plurality of conventional disk pelletizer 100 based on the raw material for pellet production having the composition ratio of Table 1. In addition, the D-shape is a composite of the multi-functional pelletizer 1 and the disk pelletizer 100 according to the present invention by molding the non-plastic pellets based on the raw materials shown in Table 1.

In view of the above embodiment, having a composition ratio of Table 1, based on the raw material for the production of pellets generated in the steelmaking process, as a multifunctional pelletizer 1 according to the present invention, forming a non-plastic pellet requires a separate pellet It can be appreciated that the strength, recovery rate and reduction rate are significantly improved compared to molding and manufacturing as a pelletizer 100 based on the raw material for manufacturing.

Therefore, according to the multifunctional pelletizer 1 according to the present invention, the raw material for producing pellets in which the iron-containing dust and iron ore of fine powder generated in the steelmaking process are mixed at an appropriate ratio without a separate crushing process is coated powder 20, By forming and manufacturing non-plastic pellets having excellent quality while passing through the strength enhancing unit 30 and the sorting unit 40 in order, the practical use of the device can minimize the installation occupied space and significantly improve its strength, recovery rate and reduction rate. Effect is obtained.

Claims (1)

In the pellet manufacturing equipment for manufacturing pellets used in the iron making process, 65 to 95% of iron-containing dusts having a constant particle size of 1 mm or less and 0.1 to 20% of iron ore having a constant particle size of 10 mm or less are mixed with 5-15% of cement-based materials. Drum portion 10 having a cylindrical drum member 11 to which the raw material for pellet production is transferred: Powder coating portion 20 in which a plate-shaped lifter 21 is formed in the circumferential direction on the inner circumferential surface to improve the droplet ratio of the raw material. ); A cylindrical strength improving part 30 which is continuous to the powder coating part 20 and increases the strength of the raw pellets formed of the raw material; Continuous to the strength improvement unit 30, the pellets of a certain size or more is transferred to the product belt 62, the pellets of a predetermined size or less on the outer peripheral surface of the screen net 41 for dropping the return belt 61 of the lower side A sorting unit 40 formed; And a motor (54) having a chain (51) on the outer circumferential surface of the strength enhancing unit (30) and driving a reducer (53) connected to a gear (52) engaged with the chain (51). Multi-function pelletizer for increasing the quality and recovery rate of the pellet comprising a; drive unit (50) for rotating in one direction.