KR20050023707A - An apparatus for screening the small size oer for blast furnace - Google Patents

Abstract

PURPOSE: To provide an apparatus for effectively preventing apertures of screen from being clogged to improve an overall apparatus workability and sorting fine ore from small sized ore more smoothly to prevent substantial operation troubles such as instable blast furnace circumstances due to charging of fine ore into blast furnace. CONSTITUTION: The apparatus(1) for screening small sized ore for blast furnace comprises a frame vibrated by a vibrator driven by a motor; a screen belt(50) which is installed on the frame in such a manner that the screen belt is rotationally driven along an endless track by a driving means, and on which apertures(52) are integrally formed to sort fine ore from small sized ore; and a guide for guiding discharge of fine ore sorted from the screen belt, wherein the screen belt driving means comprises a driving pulley, a driven pulley(34), a plurality of guide pulleys(36) and a tension pulley, wherein the driving and driven pulleys of the driving means are consisted of center projection type pulleys in which diameter of the pulleys is reduced to both sides from the center of the pulleys so that small sized ore is sorted by the screen belt as small sized ore is distributed on the screen belt through the driving and driven pulleys, and wherein the apparatus further comprises curtain members(54) formed on an edge part of the screen belt to prevent ore from being leaked to the outside.

Description

Small particle screen device for blast furnace {AN APPARATUS FOR SCREENING THE SMALL SIZE OER FOR BLAST FURNACE}

The present invention relates to a small particle screen device for blast furnace for re-selecting the small particle used as raw material of the blast furnace in the steel mill, and more specifically, the small particle screen while effectively preventing the blockage of the screen in the small particle screen operation The present invention relates to a small blast furnace screen device for blast furnaces that can improve the operability by allowing a large amount of small particle screens to be carried out while making the work more smoothly.

Ores used as raw materials for blast furnaces in steel mills go through various stages of particle size sorting. This basis weight works through screens for opposing minerals, for example, through opposing light screens with more than 10 mm Φ of screens actually screened. A small particle having a spectroscopic diameter of 10 mm Φ or less is again selected through a small particle screen, for example, a small particle screen having a screen diameter of 4 to 6 mm Φ in the screen device. In FIG. 1, a basis weight process of blast furnace raw material is illustrated.

That is, as shown in FIG. 1, alleles emitted from the allele storage tank 100 are selected from the allele screen 110, and a portion of the allergic light hopper 130 is located along the induction chute 120. ) And the remaining screened alleles are sent from the small particle screen 140 through the conveyor belt to the other relay hopper 150 on one side of the blast furnace through the screening strain conveyor belt 142, where the selected spectroscopy It is returned via the conveyor belt 160.

On the other hand, Figure 2 shows a conventional small particle screen device.

That is, as shown in Figure 2, the conventional small particle light screen device 200, the small particle light (C1) is stored in the primary light is selected, the primary light is more than the particle size of 10mm Φ selected from the allergic light screen 110 The screen 230 in which the screen 220 is installed below the small particle storage hopper 210 vibrates integrally while vibrating by the elasticity of the vibrator 240 and the spring 260 operated as the lower motor 250. Spectroscopy (C2) with a particle size of less than 4mmΦ selected by 220 is sent to the sintering plant through the induction chute 270 and the conveyor 160 (FIG. 1,2), and passed through the small particle screen 220 During the final screening of ˜9 mm Φ, small particles C1 are charged into the blast furnace as shown in FIG. 1.

However, as shown in FIG. 2, in the conventional small particle screen device 200, the pastoral 222 of the mat-type screen 220 fixed to the vibrating frame 230 has a small size of 4 to 6 mm Φ. Because of its size, spectra are easily clogged in screen pastry 222 during continuous screen operation.

Therefore, the screening operation is not effectively performed when the medium and small particles (C1) are screened, and due to the clogging of the screen, the spectral (C2) is not screened together with the medium and small particles (C1). It is not only to reduce the air permeability of the blast furnace, but also to provide a cause for destabilizing the blast furnace blasting as a whole.

In addition, the worker to solve this problem requires additional and cumbersome work to clean up if the pastoral 222 of the screen 220 is periodically blocked, in this case because the operation of the screen device 200 is stopped, There have been several problems, such as lowering the overall plant utilization rate.

SUMMARY OF THE INVENTION The present invention has been made to improve various problems as described above, and an object thereof is to prevent clogging of a screen in a small particle sorting screen device for screening spectroscopy from small and medium light having alleles selected. It effectively prevents the overall operation of the device, prevents screen blockage during online operation, improves the operation rate of the device, and eliminates the need for idle operation of the blast furnace. To provide.

In addition, another object of the present invention, while preventing the blockage of the screen pastoral is more smoothly performed spectroscopy from the small particle light to prevent the actual operation troubles such as the instability of the furnace blast furnace other than the charging of the spectral blast furnace in advance The present invention provides a small particle screen device for a blast furnace.

The present invention as a technical configuration for achieving the above object, the frame vibrating as a motor-driven vibrator;

A screen belt installed in the frame as a driving means with a crawler, and formed with integrally shaped trees for selecting spectral from small particles; And

A guide for inducing and discharging spectroscopy selected from the screen belt;

Including a, characterized in that configured to prevent the clogging of the screen belt is driven to rotate in an endless track.

Hereinafter, a preferred embodiment of the present invention according to the accompanying drawings in detail as follows.

Figure 3 is a perspective view showing a small particle screen device for blast furnace according to the present invention, Figure 4 is a front structural view showing a small particle screen device for blast furnace of the present invention, Figure 5 is the operation of the small particle screen device for blast furnace of the present invention 6 is a schematic plan view showing the blast furnace small particle screen device according to the present invention, and FIG. 7 is a perspective view showing a screen belt driven US driven pulley in the blast furnace small particle screen device according to the present invention. .

In FIG. 3, the overall configuration of the blast furnace small particle screen device 1 according to the present invention is shown. The blast furnace small particle screen device 1 of the present invention is largely composed of a frame 10 and a driving means 30. Carrier P1 for sorting medium and small particles C1 in an endless orbit form, and return part P2 which is transported in an empty state without ore and the spectroscopy C2 stuck to the pastoral 52 is removed to prevent clogging. It can be divided into the screen belt 50 and the guide 70, the components 10, 50, 70 will be described in detail as follows.

First, Figs. 3 and 5 show the frame 10 of the blast furnace small particle screen device 1 of the present invention. The frame 10 of the present invention is a vibrator driven as a motor 12a. 12) is configured to vibrate in conjunction.

At this time, the frame 10 is supported on the lower support object, the induction chute 270 is connected to the conveyor belt 160 for injecting the selected spectroscopic (C1) in the sintering ore process, A hopper 14 for storing medium and small particles C1 is installed at an upper side, and a front side associated with a conveyor belt 142 for feeding medium and small particles C1 to a blast furnace in which a spectrometer C2 is selected at a front side. The side induction chute 16 is arranged to be connected.

Next, FIG. 3, FIG. 4 and FIG. 6 show the screen belt 50 of the blast furnace small particle screen device 1 of the present invention. The screen belt 50 of the present invention is substantially a conventional mat. It has a screen and configuration features.

That is, the screen belt 50 is installed on the frame 10 so as to drive rotationally as the driving means 30 in the form of the endless track of the carrier part P1 and the return part P2, and spectroscopy from the small particle light C1. The pastors 52 for sorting (C2) are formed integrally arranged.

And, as shown in Figure 4, both sides of the screen belt 50, the curtain member 54 is provided integrally to prevent the external leakage of ore, these large member 54 is made of rubber, etc. The scrapers are integrally vertically attached to the body portion of the belt 50 in a form of partially overlapping each other.

In this case, as shown in FIGS. 3 to 5 and 7, the orbital transport of the screen belt 50, which makes it possible to substantially select the spectral (C2) from the small, medium light (C1) Specifically, the screen belt driving means 30 is divided into a driving pulley 32, a driven pulley 34, a guide pulley 36, and a tension pulley 38.

That is, the screen belt driving means 30, the drive pulley 32 is installed to drive the motor 32a and the drive belt 32b to the frame 10, and the frame (on the opposite side of the drive pulley 32) And a plurality of guide pulleys 36 provided between the driving and driven pulleys, and a tension pulley 38 provided below the guide pulleys 36.

At this time, in Figure 3 B is a bearing block for supporting the shaft portion of each of the pulleys.

Therefore, as shown in Figs. 4 and 5, when the drive pulley 32 is driven as a motor 32a, the screen belt 50 is the drive pulley 32, driven pulley 34 and tension pulley As 38, the guide portion pulleys 36 are transported in the form of an endless track of the carrier portion P1 and the return portion P2 which are selected while moving the medium and small particles C1. Block unstable transfer, such as depression of the screen belt 50.

On the other hand, as shown in Figure 7, the driving and driven pulley 32, 34 is the diameter (D1) of the central portion is larger than the diameter (D2) of both ends, it is configured in the form of the central portion protruding Will be.

Therefore, when the medium and small particles C1 are dropped into the screen belt 50 which is transported to the endless track through the storage hopper 14, the screen belt 50 is driven by the driving and driven pulleys 32 and 34. In the case where both edge portions are inclined rather than the center portion, the small and medium particles C1 are distributed, thereby making it possible to efficiently select the spectrometer C2.

Next, FIG. 3, FIG. 5 and FIG. 6 show the guide 70 of the blast furnace small particle screen device 1 of the present invention, which is the guide 70 of the present invention in the screen belt 30. It is installed to induce and discharge the selected spectrophotometer (C2).

At this time, in the blast furnace small particle screen device 1 of the present invention, the medium and small particle (C1) is selected through the screen belt 50 that is rotationally driven in a caterpillar form, rather than a matt screen in the form of a plate. Therefore, the return unit P2 of the screen belt and the guide 70 should be installed so as not to interfere.

Therefore, as shown in FIG. 6, the guide 70 of the present invention receives the selected spectrometer C2 in the central space portion between the caerer portion P1 and the return portion P2 of the screen belt 50. There is a body portion 72, which is subsequently configured to form an opening 74 is formed to exit the outside of the belt to discharge the spectroscopic C2 to the lower side of the induction chute 270.

Referring to the operation of the present invention made of the above configuration as follows.

As shown in FIGS. 3 to 7, operation of the small-light screen device 1 for selecting the spectroscopic C2 affecting the visibility when input from the small and medium-sized light C1 to the blast furnace is selected from the opposing light as shown in FIGS. In order to first vibrate the frame 10 with a vibrator (12).

3 and 4, the middle and small particles C1 in the storage hopper 14 are operated on the screen belt 50 underneath by operating the gate 14a installed in the storage hopper 14. Put it in.

Therefore, the medium and small particles C1 in the state mixed with the spectroscope C2 are distributed over the whole portions according to the central projection shape of the driving pulley 32 and the driven pulley 34 on the upper surface of the screen belt 50. While the medium and small particles (C1) having a particle size larger than the pastoral 52 formed on the screen belt 50, the blast furnace after the small and medium sized light basis weight operation through the induction chute 16 along the screen belt 50 is rotated to be inclined Is charged in.

Next, when the spectroscopy C2 having a particle size smaller than the pastoral 52 of the screen belt 50 passes through the pastoral 52 of the screen belt 50 and falls into the lower guide 70, FIG. 6. As shown, the spectroscopic C2 dropped by the opening 74 along the guide body 72 inclined to both sides is sent to the sintering plant as the return conveyor belt 160 through the induction chute 270. .

On the other hand, the spectroscopic C2 fitted to the pastor 52 of the screen belt 50 during the sorting operation of the medium and small particles C1 is wound around the driving pulley 32 and the driven pulley 34, and is pulled. As the opposite side in contact with the field is expanded, eventually, the spectroscopy fitted to the pastor 52 of the screen belt 50 are removed, and when the screen belt 50 is orbitally transferred compared to the mat-type screen, the pastoral ( Blockage of 52) is effectively prevented.

Thus, according to the small particle screen device for blast furnace of the present invention, since the screen of the small particle screen screen device for screening the spectroscopy from the small and medium light is selected to prevent the blockage of the screen effectively, the overall device operability In addition, the screen wood blockage is prevented during on-line operation, thereby improving the device operation rate, and eliminating the need for idle running of the device for cleaning the wood.

In addition, while preventing clogging of screen trees, spectral screening from small particles is performed more smoothly, thereby preventing the occurrence of actual operation troubles such as the instability of blast furnaces in the blast furnace charging and other blast furnaces. There is no need for cleaning work, so it provides an excellent effect to prevent the safety accident of the worker.

While the invention has been shown and described in connection with specific embodiments so far, it will be appreciated that the invention can be varied and modified without departing from the spirit or scope of the invention as set forth in the claims below. It will be appreciated that those skilled in the art can easily know.

1 is a schematic diagram showing a raw material basis weight system of the blast furnace

2 is a block diagram showing a conventional small particle screen device for blast furnace

Figure 3 is a perspective view showing a small particle screen device for blast furnace according to the present invention

Figure 4 is a front structural view showing a small particle screen device for blast furnace of the present invention

Figure 5 is an operating state showing the operating state of the present inventors blast furnace small particle screen device

Figure 6 is a schematic plan view showing a small particle screen device for blast furnace of the present invention

Figure 7 is a perspective view showing the screen belt drive and driven pulley in the present inventors blast furnace small particle screen device

Explanation of symbols on the main parts of the drawings

1 .... small particle screen device for blast furnace 10 .... frame

30 .... means for driving the screen belt 32 .... driving pulley

34 .... driven pulley 36 .... guide pulley

38 .... tension pulley 50 .... screen belt

52 .... Pastoral 54 .... Curtains

70 .... Guide C1 .... Medium and small particle

C2 .... spectroscopy

Claims (4)

A frame 10 vibrating as a motor driven vibrator; A screen belt (50) integrally formed in the frame (10) as a driving means (30) for rotational driving and integrally formed with trees (52) for selecting the spectroscopic (C2) from small particles (C1); And A guide (70) for inducing and discharging the selected spectrometer (C2) from the screen belt (30); Small particle screen device for blast furnace configured to prevent the clogging of the screen belt is driven to rotate in a crawl The method of claim 1, wherein the screen belt driving means 30, A drive pulley 32 installed to drive the motor in the frame 10; A driven pulley 34 mounted to the frame 10 on the opposite side of the drive pulley 32; A plurality of guide pulleys 36 installed between the driving and driven pulleys; And A tension pulley 38 installed below the guide pulley 36; Small particle screen device for blast furnace configured to drive the screen belt to rotate in the caterpillar, including 3. The driving and driven pulleys (32) and (34) of the driving means (30) are composed of a central protrusion type pulley having a diameter smaller on both sides with respect to the center and on the screen belt (50). Small particle screen device for blast furnace, characterized in that the small particle (C1) is distributed and selected to be selected The small particle screen device for blast furnace according to claim 1, wherein the edges of the screen belt (50) are provided with curtain members (54) for pants the external leakage of ore.