JP5272556B2 - Forwarding method of steelmaking raw material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an iron-making material forward delivery method for forward delivering iron-making material onto an on-ground belt conveyor without scattering therearound dust produced during forward delivery of the iron-making material. <P>SOLUTION: A dust scattering preventing hood 23 is provided on a moving carriage 13 of a moving machine for preventing the scattering of dust produced during forward delivery of the iron-making material, and a collecting duct is connected to the dust scattering preventing hood 23 for forward delivering the iron-making material onto the on-ground belt conveyor 19 while collecting the dust. A chute is set close to a material charge port formed in the dust scattering preventing hood 23 for forward delivering the iron-making material onto the on-ground belt conveyor. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  TECHNICAL FIELD The present invention relates to a method for forward-feeding iron-making raw materials such as iron ore and coal onto a ground belt conveyor, particularly when iron-making raw materials are loaded into a raw-material yard of a steel mill or iron-making raw materials are discharged from the raw-material yard. The present invention relates to a method for pre-feeding a steelmaking raw material onto a ground belt conveyor using a moving machine used in the above.

  In general, in a steel mill, a moving machine 11 as shown in FIG. 5, that is, a moving carriage 13 that moves on a track 12 laid in a raw material yard of the iron works, and a movable carriage 13 that can be turned and raised on the moving carriage 13 are provided. Boom belt conveyor 14, a bucket wheel 15 provided at the tip of the boom belt conveyor 14, a tripper belt conveyor 16 having a chute 17 for dropping the iron-making material on the boom belt conveyor 14, and the tripper The steelmaking raw material is stacked, delivered and forwarded using a moving machine 11 having an auxiliary carriage 18 that moves the belt conveyor 16 along the track 12.

For example, when iron-making raw materials are stacked in the raw material yard, the iron-making raw materials conveyed by the tripper belt conveyor 16 are stacked in the raw material yard via the chute 17 and the boom belt conveyor 14 as shown by an arrow 20 in FIG. ing.
Further, when the steelmaking raw material stacked in the raw material yard is paid out, the ironmaking raw material scraped off by the bucket wheel 15 is passed from the raw material yard to the ground belt conveyor via the boom belt conveyor 14 as shown by an arrow 21 in FIG. 19 is paid out.
Further, when the steelmaking raw material is forwarded onto the ground belt conveyor 19 without being stacked in the raw material yard, the steelmaking raw material passes through the tripper belt conveyor 16 and the chute 17 as shown by an arrow 22 in FIG. Forwarding up.

  By the way, when iron-making raw materials are stacked in the raw material yard, since the iron-making raw materials are loaded with the tip of the boom belt conveyor 14 placed on the ground or close to the loading raw materials, a large amount of dust is generated when the iron-making raw materials are stacked. Never do. Also, when the steelmaking raw materials are paid out from the raw material yard, the raw materials rub against each other when the ironmaking raw materials are stacked, or excess raw material powder is dropped, or the ironmaking raw materials in the yard stockpile contain rainwater or moisture in the atmosphere. Therefore, a large amount of dust is not generated when the steelmaking raw material is dispensed. However, when the steelmaking raw material is forwarded onto the ground belt conveyor 19, the steelmaking raw material is dropped onto the ground belt conveyor 19 from the chute 17 to forward the steelmaking raw material. Scatter.

Therefore, in order to solve this problem, the dust scatter prevention hood is provided on the movable carriage of the mobile machine so as to cover the upper surface of the ground belt conveyor to prevent dust scatter, or the techniques described in Patent Documents 1 to 4 It has been studied to prevent the scattering of dust by using slag.
Japanese Patent No. 3183972 Japanese Patent No. 2910595 JP 2004-331356 A Japanese Utility Model Publication No. 63-144939

However, it is actually difficult to prevent dust scattering that occurs when the steelmaking raw material is fed forward only by providing a dust scattering prevention hood on the moving carriage of the mobile machine.
Further, the technique described in Patent Document 1 is a technique for preventing dust generation by mounting a dust collector on an unloader used when unloading raw materials from a ship, and the technique described in Patent Document 2 is for loading iron-making raw materials. A technique for preventing dust generation by providing a dust collector on a traveling ship loader that is sometimes used, the technique described in Patent Document 3 is to place a dust collector on the belt turning part of a belt conveyor for bulk goods Since the technology for preventing dust generation and the technology described in Patent Document 4 is a technology for preventing dust generation by providing a dustproof device on the connecting chute portion of the boom conveyor, scattering of dust generated during the forward feeding of the iron-making raw material In practice, it has been difficult to prevent these problems by applying the techniques described in Patent Documents 1 to 4.
The present invention has been made in view of the above-described circumstances, and forward feed of an iron making raw material that can forward the iron making raw material onto the ground belt conveyor without scattering dust generated during the forward feed of the iron making raw material to the surroundings. It is intended to provide a method.

In order to solve the above-mentioned problem, the method of forward feeding the steelmaking raw material according to the invention described in claim 1 is a method of forward- feeding the steelmaking raw material onto the ground belt conveyor, wherein the ironmaking raw material is placed on the ground belt conveyor. As the machine to be forwarded, a moving carriage that runs on a track laid in the raw material yard of the steel mill, a boom belt conveyor that is turnable and upliftable on the moving carriage, and a tip of the boom belt conveyor a bucket wheel is provided, said boom belt and tripper belt conveyor having a tip chute to drop the steel material on the conveyor, dust scattering prevention hood provided on the moving carriage so as to cover the upper surface of the ground conveyor belt And a dust collection duct connected to the dust scatter prevention hood, and connected to the dust scatter prevention hood via the dust collection duct. And the mobile machine used with a dust collector, the dust collector of the steel material which has been conveyed by the tripper belt conveyor from the chute through raw material inlet formed in the upper surface portion of the dust scattering prevention hood on the ground belt conveyor It is characterized by dropping while operating .

How forwarding steelmaking material according to the invention of claim 2, wherein the method prior to feeding of the steel material of claim 1, wherein, before the steel material close to the chute before Kihara material inlet on the ground conveyor belt It is characterized by feeding.
The method for forward feeding of iron making raw material according to the invention described in claim 3 is the method for forward feeding of iron making raw material according to claim 1 or 2, wherein the dust collector is installed at a place different from the movable carriage , and the dust collecting raw material is moved forward. It is connected through a duct and a dust collector side duct .

A method for forward feeding an iron-making raw material according to claim 4 is the method for forward-feeding an iron-making raw material according to claim 3 , wherein the dust collecting duct is provided at an opening end of the dust collecting side dust collecting duct. it is characterized in that it has a hood side duct flange which engages over the side duct flange and a plurality of rollers.
According to a fifth aspect of the present invention, there is provided a method of feeding a steelmaking raw material according to a fourth aspect of the present invention, wherein the hood side duct flange and the dust collector side duct flange are tapered so as to be inclined away from each other. It has a part in the both ends of the moving direction of the said moving machine, It is characterized by the above-mentioned.

  According to the iron feed raw material forward feed method according to the first aspect of the invention, the dust generated in the dust scatter prevention hood is collected by the dust collection duct connected to the dust scatter prevention hood. Compared with the case where dust scattering is prevented only by the dust scattering prevention hood provided in the case, the steelmaking raw material can be forwarded on the ground belt conveyor without scattering the dust generated during the forward feeding of the steelmaking raw material. it can.

According to the iron feed raw material feed method according to the invention described in claim 2, the chute is brought close to the raw material inlet formed in the dust scatter prevention hood, and the steel feed raw material is forward fed onto the ground belt conveyor. Since it is not necessary to install a dust collector, it is possible to prevent a large amount of dust from being scattered during the forward feeding of the iron-making raw material even when the space for installing the dust collector cannot be secured on the moving carriage.
According to the iron feed raw material feed method according to the invention of claim 3, when the steel feed raw material is forwarded by bringing the chute close to the raw material inlet of the dust scattering prevention hood and the steel feed raw material is forwarded onto the ground belt conveyor. Since the amount of generated dust is reduced, it is possible to prevent a large amount of dust from being scattered during the forward feeding of the iron-making raw material.

According to the iron feed raw material feed method according to the invention of claim 4, the hood side duct flange engaged with the dust collector side duct flange provided at the opening end of the dust collection duct communicating with the dust collector via a plurality of rollers Is attached to the dust collection duct connected to the dust scatter prevention hood, and the steelmaking raw material is forwarded onto the ground belt conveyor, so that the hood side dust collection duct can be used even if the moving carriage is meandered due to uneven wear of the track and wheels. The opening end of the dust collector can be matched with the opening end of the dust collector-side dust collecting duct, whereby dust generated during the forward feeding of the iron-making raw material can be reliably collected.
According to the forward feed method of the steelmaking raw material according to the invention described in claim 5, the steelmaking raw material is provided by attaching tapered portions inclined in directions away from each other at both ends of the moving machine moving direction of the hood side duct flange and the dust collector side duct flange. By feeding forward onto the ground belt conveyor, it is possible to prevent damage to the dust collection duct due to meandering of the movable carriage.

Hereinafter, the method for forward feeding the iron-making raw material according to the present invention will be described with reference to FIGS.
FIG. 1 shows a moving carriage of a moving machine that is applied to a method for feeding iron-making raw materials according to an embodiment of the present invention. As shown in the figure, the moving carriage 13 of the moving machine is provided with a dust scattering prevention hood 23 that covers the upper surface of the ground belt conveyor 19 to prevent dust scattering generated when the steelmaking raw material is fed forward. Yes.

The dust scattering prevention hood 23 has raw material inlets 24 and 25, and of these raw material inlets 24 and 25, the raw material inlet 24 formed in the upper front portion of the dust scattering prevention hood 23 has a raw material yard. The iron-making raw material paid out from is supplied from the boom belt conveyor 14.
The raw material inlet 25 is formed in the upper rear portion of the dust scattering prevention hood 23 so that the iron-making raw material fed forward from the tripper belt conveyor 16 onto the ground belt conveyor 19 is input into the raw material inlet 25. It has become.

As shown in FIG. 2, one end of a dust collection duct 26 is connected to the dust scattering prevention hood 23. This dust collection duct 26 (hereinafter referred to as “hood-side dust collection duct 26”) is mounted on the movable carriage 13, and is separated from the movable carriage 13 via the dust collection duct 28 when the steelmaking raw material is forwarded. A dust collector 27 connected to the hood-side dust collection duct 26 is installed.
A dust collecting duct 28 (hereinafter referred to as “dust collector side dust collecting duct 28”) communicates with the dust collector 27 via an electric damper 29, and an opening end of the dust collector side dust collecting duct 28 is as shown in FIG. A dust collector side duct flange 32 that engages with a hood side duct flange 30 provided at the opening end of the hood side dust collection duct 26 via a plurality of rollers 31 is provided.

At both ends of the hood side duct flange 30 and the dust collector side duct flange 32 in the moving machine moving direction, tapered portions 33 that are inclined in directions away from each other are provided.
A movement limit limit switch 34 (see FIG. 1) is provided at the movement limit position of the mobile machine, and the movement of the movement carriage 13 is automatically stopped when the movement carriage 13 comes into contact with the movement limit limit switch 34. It is like that. A position matching limit switch 35 (see FIG. 1) is provided at a position where the opening end of the hood side dust collecting duct 26 and the opening end of the dust collector side dust collecting duct 28 are matched. The movement of the movable carriage 13 is automatically stopped when the movable carriage 13 comes into contact with the vehicle.

  When the steelmaking raw material is forwarded onto the ground belt conveyor 19 using such a moving machine, first, the moving carriage 13 is moved to a position where the movement limit limit switch 34 is operated. Then, the moving carriage 13 automatically stops at the movement limit position of the moving machine. After that, when the moving carriage 13 is moved to a position where the position matching limit switch 35 is activated, the movement of the moving carriage 13 is automatically stopped. At the same time, the opening end of the hood-side dust collection duct 26 matches the opening end of the dust collector-side dust collection duct 28.

  If the opening end of the hood-side dust collection duct 26 matches the opening end of the dust collector-side dust collection duct 28, the chute 17 of the tripper belt conveyor 16 is attached to the dust scattering prevention hood 23 as indicated by an arrow 36 shown in FIG. Then, the iron-making material is fed from the chute 17 of the tripper belt conveyor 16 to the material-feeding port 25 of the dust scattering prevention hood 23 to feed the iron-making material onto the ground belt conveyor 19. At this time, the dust generated in the dust scattering prevention hood 23 is collected by the hood side dust collection duct 26 connected to the dust scattering prevention hood 23, and the dust collected by the hood side dust collection duct 26 is collected on the dust collector side collection. It is sent to the dust collector 27 through the dust duct 28 and the electric damper 29.

Therefore, in one embodiment mentioned above, compared with the case where dust scattering is prevented only by the dust scattering prevention hood 23 provided on the movable carriage 13, the dust generated during the forward feeding of the iron-making raw material is not scattered around. The iron-making raw material can be forwarded onto the ground belt conveyor 19.
Further, as in the above-described embodiment, the chute 17 of the tripper belt conveyor 16 is brought close to the raw material inlet 25 of the dust scattering prevention hood 23 and the steelmaking raw material is forwarded onto the ground belt conveyor 19, so that Since the amount of dust generated at the time of forward feeding is reduced, it is possible to prevent a large amount of dust from being scattered at the time of forward feeding of the steelmaking raw material.

  In addition, the hood-side dust collection duct 26 is connected to a dust collector-side dust collection duct 28 communicating with a dust collector 27 installed at a different location from the movable carriage 13 when the iron-making material is fed forward, and the iron-making material is placed on the ground belt conveyor 19. Since it is not necessary to install the dust collector 27 on the moving carriage 13 by forward feeding, a large amount of dust is scattered during the forward feeding of the iron-making raw material even when the space for installing the dust collector 27 cannot be secured on the moving carriage 13. Can be prevented.

  Further, a dust collector side duct flange 32 that is engaged with a hood side duct flange 30 provided at the opening end portion of the hood side dust collection duct 26 via a plurality of rollers 31 is attached to the opening end portion of the dust collector side dust collection duct 28. Then, the steelmaking raw material is forwarded onto the ground belt conveyor 19 so that the open end of the hood-side dust collection duct 26 is connected to the dust collector-side dust collection duct 28 even when the moving carriage 13 is meandered due to uneven wear of the tracks and wheels. Thus, the dust generated during the forward feeding of the iron-making raw material can be reliably collected.

Furthermore, by attaching the taper part 33 which inclines in the direction which mutually separates to the moving machine movement direction both ends of the hood side duct flange 30 and the dust collector side duct flange 32, and feeds the steelmaking raw material on the ground belt conveyor 19, It is possible to prevent the dust collection ducts 26 and 25 from being damaged by the meandering of the movable carriage 13.
In addition, in one Embodiment of this invention mentioned above, although the case where the roller 31 was provided in the hood side duct flange 30 was illustrated, you may provide the roller 31 in the dust collector side duct flange 32. FIG.

It is a side view which shows the mobile trolley | bogie of the mobile machine applied to the method of forward feeding of the iron-making raw material concerning one Embodiment of this invention. It is a figure which shows the AA cross section of FIG. It is a figure which shows the detailed structure of the B section in FIG. It is a figure for demonstrating the forward feeding method of the iron-making raw material which concerns on one Embodiment of this invention. It is a figure which shows the flow of the iron-making raw material at the time of stacking a steel-making raw material on a raw material yard with a moving machine. It is a figure which shows the flow of the iron-making raw material when paying out a steel-making raw material from a raw material yard with a moving machine. It is a figure which shows the conventional method in the case of pre-feeding a steelmaking raw material on a ground belt conveyor with a moving machine.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Moving machine 12 Track | truck 13 Moving trolley 14 Boom belt conveyor 15 Bucket wheel 16 Tripper belt conveyor 17 Chute 18 Auxiliary trolley 19 Ground belt conveyor 23 Dust scattering prevention hood 24, 25 Raw material inlet 26, 28 Dust collection duct 27 Dust collector 29 Electric damper 30 Hood side duct flange 31 Roller 32 Dust collector side duct flange 33 Tapered part 34 Movement limit switch 35 Position match limit switch

Claims (5)

A method of pre-feeding iron-making raw material onto a ground belt conveyor, and as a machine for pre-feeding the iron-making raw material onto the ground belt conveyor, a moving carriage that runs on a track laid in a raw material yard of an iron mill, A boom belt conveyor provided on the movable carriage so as to be able to turn and lift, a bucket wheel provided at the tip of the boom belt conveyor, and a chute for dropping the iron-making material on the boom belt conveyor are provided at the tip. A tripper belt conveyor, a dust scattering prevention hood provided on the moving carriage so as to cover an upper surface of the ground belt conveyor, a dust collection duct connected to the dust scattering prevention hood, and the dust collection duct through the dust collection duct using a mobile machine that includes a connected dust collector to the dust scattering prevention hood, conveyed by the tripper belt conveyor Forwarding method in a steel material, characterized in that the dropped while operating the dust collector on the ground belt conveyor from said chute a steel material through raw material inlet formed in the upper surface portion of the dust scattering prevention hood. How forwarding the steel material according to claim 1, characterized in that forward feed the steel material close to the chute before Kihara material inlet on the ground conveyor belt. The said dust collector is installed in the place different from the said mobile trolley | bogie , and is connected via the said dust collector duct and the dust collector side duct, The iron feed raw material feed method of Claim 1 or 2 characterized by the above-mentioned. The dust collecting duct, according to claim 3, characterized in that it comprises a hood-side duct flange which engages through a dust collector duct flange and a plurality of rollers provided on the open end of the dust collector side dust collecting duct The forward feed method for steelmaking materials The said hood side duct flange and the said dust collector side duct flange have the taper part which inclines in the direction which mutually spaces apart in the moving direction both ends of the said moving machine, The iron feed raw material feed method of Claim 4 characterized by the above-mentioned.

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