JPH108115A - Method for charging mud material into mud gun for blast furnace and its apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a apparatus for surely and automatically charging mud material for plugging an iron tapping hole of a blast furnace into a mud gun by necessary and suitable number. SOLUTION: This charging method is executed by charging the block-state mud material into a cylinder of the mud gun for pressing-in the mud material 7 to plug the iron tapping hole 4 after completing the iron tapping. In such a case, the mud material charged into the cylinder of the mud gun is detected on a conveying machine 10 with an optical sensor 13 and number of the mud materials are calculated with this detected signal and, while judging whether the setting number of mud materials are conveyed within a setting time or not, the mud material is discharged into a pallet 6 and charged into the mud gun.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus and a method for automatically loading a mud material for closing a tap hole of a blast furnace into a mud gun in an appropriate number required for closing.

[0002]

2. Description of the Related Art After completion of tapping in a blast furnace, a mud kneaded with fine coke, alumina-based refractory powder and clay powder is pressed into a taphole and closed by a mud gun. Conventionally, the mud was loaded into the mud gun manually by a worker. However, this charging operation is performed in front of a blast furnace having a poor working environment in a high-temperature atmosphere, and has a problem that a large number of workers are required. For this reason, development of mechanization and automation of the loading operation has been strongly desired.

[0003] In recent years, in order to solve the above problems, automatic loading devices for mud materials have been developed, and some of them have been disclosed. As typical devices disclosed, Japanese Utility Model Application Laid-Open No. 59-165443 (prior art 1),
JP-A-2-230906 (prior art 2) and JP-A-6-230906
There is one described in Japanese Patent Application Laid-Open No. 2-224609 (prior art 3).

The prior art 1 discloses that a mud material is formed into a spherical shape and provided with a mud storage section provided with a downwardly inclined guide plate and a swingable fixed quantity cutting cam mechanism provided in the storage section. Device to be loaded ". Further, the prior art 2 calculates a necessary number of injections based on the distance between the standby position of the plunger of the mud gun and the most advanced position of the plunger, the cross-sectional area of the cylinder, and the volume of one mud. The number of divided injections and the axial thickness of the cylinder occupied when one injection mud is filled are determined from the number of single injections, and the mud injection robot throws one mud, A step of shortening the stroke of the plunger by the axial thickness each time the robot is advanced from the most advanced position in order to fill the batch of the mud, and advancing the plunger by the number of divided injections. , Filling method ". Further, the prior art 3 is “a method of loading a mud into a mud gun, which transports a lump of mud cut from a mud storage device arranged at a remote position remote from the blast furnace to a mud gun arranged around the blast furnace by airflow.

[0005]

However, each of the above prior arts has the following problems. That is,
"Prior art 1" is based on the premise that the shape of the mud material is spherical, and requires a special molding device for molding the mud material into a spherical shape. Further, there is a disadvantage that the mud material easily rolls and is difficult to handle. In "Prior art 2", loading is performed using a charging robot having a large number of detection sensors. If such a robot is installed in front of a blast furnace, the problem that the robot malfunctions due to high temperature and scattered dust may occur. is there. "Prior art 3" requires a special molding device because the mud material needs to be spherical in order to transport the air through the pipe. Further, since the mud material is easily deformed, the rolling becomes worse in the middle of the pipe, and there is a problem that the pipe is blocked.

[0006] The present invention solves the above problems,
It is an object of the present invention to provide a method and an apparatus for loading a mud material capable of reliably transporting a mud material from a pallet and supplying the mud material to a mud gun.

[0007]

The present invention achieves the above object by the following apparatus or method.

The first method is a method of loading a mud material in a block shape into a mud gun cylinder which is closed by press-fitting the mud material into a tap hole when the tapping is completed. Detecting the mud material to be loaded on the transporter by an optical sensor, calculating the number of mud materials based on the detection signal, and determining whether the set number of mud materials has been transported within a set time. This is a method of loading mud material on a blast furnace mud gun which cuts out mud material on a pallet and loads the mud gun.

The second method is the same as the first method, except that an extrusion cinder for extruding the mud material on the pallet and a mud material cutting cylinder for cutting the mud material on a transfer machine are operated intermittently, and the mud material is placed on the transfer path. This is a method of loading mud material into a blast furnace mud gun.

The apparatus includes an extrusion cylinder for intermittently extruding a mud material on a pallet, a cutting cylinder for cutting out the mud material extruded by the extrusion cylinder one by one into a conveyor, and being conveyed by the conveyor. A blast furnace having a sensor for detecting a mud material, a counter for counting the number of mud materials based on a detection signal from the sensor, and a discriminating means for discriminating whether or not the set number has been counted within a set time, and outputting the discriminated result. This is a device for loading mud material into the mud gun.

The first method is to detect a mud material conveyed by a carrier by a sensor, calculate the number of mud materials, and determine whether a set number of mud materials has been conveyed within a set time. Extrusion, because it is loaded while judging
It is possible to quickly detect the occurrence of abnormalities such as cutting and transporting. In addition, the required number of mud members for closing the taphole can be reliably and accurately loaded.

According to the second method, the mud members can be loaded on the conveyor at a constant interval one by one. Accordingly, it is possible to prevent an abnormality in which the mud material discharged from the transporter is clogged by the downstream chute. Also, the mud material is securely charged into the mud gun cylinder.

In the above apparatus, the mud members on the pallet are cut out one by one at intervals by the extrusion cylinder and the cutting cylinder which are operated intermittently. If an abnormality occurs in the device, the set number is not counted within the set time, so that it can be quickly grasped.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing a basic configuration of the present invention. 1 is a blast furnace body, 2 is a blast furnace skin, 3
Is a firebrick layer, and 4 is a taphole. 12 is a taphole 4
A mud gun 5 disposed on the casting bed in the vicinity of is a hot metal gutter for flowing hot metal and slag flowing out of the tap hole 4 to downstream equipment. After completion of tapping, the mud gun 12 pivots from the evacuation position to the taphole, closes the taphole, and returns to the evacuation position again. Mud material inlet 1 of mud gun 12 in the retracted position
A transport conveyor 10 and a chute 11 are provided between the pallet place PS and the mud gun 12 for transporting the mud material to 2a and guiding the mud material to the input port 12a. 10a
Denotes a drive motor of the conveyor 10. A pallet place PS is provided at the tail of the conveyor 10 perpendicularly to the conveying direction. An extrusion cylinder 8 is provided on the left side of the front end of the pallet place PS to push the mud members 7 aligned on the pallet 6 in the left-right direction from the pallet to the right direction. A cutting cylinder 9 that cuts out the mud material 7 extruded by the cylinder 8 in the conveying direction of the conveying conveyor 10 is provided. The pallet 6 is intermittently moved from rear to front by moving means (not shown). Note that rectangular attachments 8a, 9a for abutting a large area on the side surfaces of the cubic or rectangular mud member 7 are attached to the tip ends of the rods of the extrusion cylinder 8 and the cutting cylinder 9.

In order to carry out the method of the present invention, the above-mentioned equipment is further provided with detection and control means described below.

An optical sensor 13 for detecting the mud material 7 being conveyed and outputting a detection signal is provided above the conveying surface of the conveyer 10. In addition, the detection signal from the optical sensor 13 is received, the number of mud members 7 is calculated, and when the cumulative number of conveyed pieces for a predetermined time reaches the set number, the mud number setting counter 1 that outputs the result is output.
4 and whether or not the accumulated number has been counted (conveyed) within the set time, and based on the result, an operation / stop command is issued to the extrusion cylinder 8, the cutting cylinder 9, the drive motor 10a of the conveyance conveyor, and the like. A setting timer 15 for outputting is provided.

In the present invention, the operation and stop of the extrusion cylinder 8, the cutting cylinder 9, the drive motor 10a of the conveyor and the like are controlled by the optical sensor 13, the mud number setting counter 14 and the setting timer 15.

FIG. 3 is a plan view of a mud material loading device according to one embodiment of the present invention, and FIG. 4 is a side view of the mud material loading device of one embodiment of the present invention. 3 and 4, a charging chute 11 is provided at a charging port 12a of the mud gun 12 with its lower end facing. When the mud gun 12 moves from the evacuation position and returns to the evacuation position, the input chute 11 can be rotated by the air cylinder with its upper end as a fulcrum so as not to interfere. Mud material 7 on input chute 11
The chain conveyor 10 is installed so that the head part faces the upper part of the chute 11 so as to discharge the oil. Since the chain conveyor 10 conveys the mud member 7 at an upward inclination of about 30 degrees, a non-slip is provided on the conveyor every six links so that the mud member 7 does not slide backward on the inclined portion.

The rear part of the chain conveyor 10 is a horizontal part. Roller tables 20a and 20b for transferring the pallet 6 from the rear to the front are provided on the left side of the horizontal portion. At the left side of the roller table between the roller table 20a and the roller table 20b, three extrusion cylinders 8 for expanding and contracting the rod in the left-right direction are provided at predetermined intervals in the vertical direction (the height at which the mud material 7 can slide easily). At intervals). In addition, three cutting cylinders 91, 9m, and 9u that extend and retract the rod in the front-rear direction are provided at the rear position of the rear end of the chain conveyor 10.
The predetermined intervals are provided in the vertical direction. These three cutting cylinders 91, 9m, 9u are at the same height level as the three extrusion cylinders 8.

In front of each of the cutting cylinders 9l, 9m, 9u, each shelf plate 6 of the pallet 6 on the roller table 20a.
Guide chutes 21a, 21 to the same level height as b
b, 21c are provided. By these guide chutes, the three cutting cylinders 9l, 9m, 9u
The mud material 7 cut out at the step S slides down the slope of each guide chute and transfers to the rear part of the chain conveyor 10.

The pallet 6 has two shelves 6b provided at a height interval at which the mud member 7 can slide easily.
Further, a spacer 6c is provided extending in the left-right direction to separate the mud member 7 adjacent to the upper surfaces of the underframe 6a and the shelf 6b. The mud material 7 is placed on each pallet 6 in eight columns in the left-right direction, seven rows in the front-rear direction, and three steps in the vertical direction.
The pallet 6 is placed on the roller table 20a. The pallet moving cart 23 is a roller table 20a.
The upper pallet 6 is raised by the dog cylinder 22 with the dog attached to the pallet moving trolley 23, biting into the hole on the lower surface of the underframe 6 a of the pallet 6, and moving the pallet trolley 23 in the front-rear direction. , The pallet 6 is fed forward one line at a time. The empty pallet from which all the mud material has been discharged by the extrusion cylinder moves onto the roller table 20b. This empty pallet is transported to a mud material loading place by a forklift or the like.

The above-mentioned mud material loading device is provided with the optical sensor 13, the mud number setting counter 14 and the setting timer 15 of FIG. 1 in order to perform automatic operation control of each device.

Next, an automatic operation method of the mud material loading device will be described with reference to the block diagram of FIG. (1) Check that "the plunger of the mud gun 12 is at the retreat limit. The mud gun is turned and is in the retracted position. The lower end of the shooting chute 11 is at the lower limit position."; S
1

(2) A fully automatic switch of the mud material loading device is turned on. S2: Operation of the chain conveyor 10; S3 → "Advance of the extrusion cylinder 8 → Cylinder 9l,
9m, 9u forward "; S4 →" Retraction of extrusion cylinder 8 → cutting cylinder 9l,
9m, 9u retreat "; S5 →" The mud number setting counter detects that the set number (5) is reached based on a signal from the optical sensor 13. "; S6 →" Chain conveyor 10 temporarily stopped and extruded cylinder, S7 → “The plunger of the mud gun 12 moves one stroke for a set time (eg, 12 sec) to fill the mud material forward in the cylinder.”; S8 → “Steps S3 to S8 The filling number setting timer determines whether or not the number of repetitions has reached a set number of times (eg, 21 times). If YES, the filling is completed, and if NO, S3 to S8 are repeated. "; S10 The setting timer 15 determines whether or not the accumulated number has been counted (conveyed) within the set time during the above-described process. Regarded as a normal occurrence, to stop all the equipment, the alarm sounds.

[0025]

FIG. 5 is a plan view showing an example of the arrangement of the equipment when the apparatus of the present invention is installed in front of a blast furnace. In FIG.
1 and 3 are denoted by the same reference numerals, and description thereof is omitted. A turning device 25 turns the mud gun 12 between the retracted position and the tap hole position. Reference numeral 30 denotes a forklift for placing a pallet loaded with mud material on the roller table 20a or lowering an empty pallet from the roller table 20b and transporting it to a mud material loading place.

Table 1 shows the specifications of the device embodying the present invention.

[0027]

[Table 1]

[0028]

According to the present invention, abnormalities in the process of extruding, cutting out and conveying a mud material from a pallet can be detected quickly, and damage to equipment can be prevented. Further, the mud material required for closing the taphole can be automatically and reliably loaded into the mud gun. Therefore, since the tap hole can be closed in a short time, the tapping operation is sped up. Further, the unit consumption of the mud material can be reduced.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a basic configuration of the present invention.

FIG. 2 is a block diagram of operation control of the device of the present invention.

FIG. 3 is a plan view of a mud material loading device according to one embodiment of the present invention.

FIG. 4 is a side view of the mud material loading device according to one embodiment of the present invention.

FIG. 5 is a plan view showing an arrangement example of equipment when the apparatus of the present invention is installed in front of a blast furnace.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Blast furnace body 4 Tap hole 6 Pallet 7 Mud material 8 Extrusion cylinder 9, 9l, 9m, 9u Cutting cylinder 10 Conveyor or chain conveyor 11 Input chute 12 Mud gun 12a Input port 13 Optical sensor 14 Mud number setting counter 15 Setting timer 20a, 20b Roller table 21a, 21b, 21c Guide chute 22 Dog cylinder 23 Pallet moving cart 30 Forklift

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Takeshi Uekawa 1-2-1, Marunouchi, Chiyoda-ku, Tokyo Nihon Kokan Co., Ltd. (72) Inventor Noriumi Uesugi 1-2-1, Marunouchi, Chiyoda-ku, Tokyo Sun Honko Co., Ltd.

Claims (3)

[Claims] 1. A method for loading a block material into a cylinder of a mud gun in which a mud material is press-fitted into a tap hole when the tapping is completed, and wherein the mud is charged into a cylinder of the mud gun. Detects the material on the conveyor, calculates the number of mud materials based on the detection signal, and cuts out the mud material on the pallet while determining whether the set number of mud materials has been conveyed within the set time. A method for loading mud material into a blast furnace mud gun, wherein the mud material is loaded into the blast furnace mud gun. 2. The method according to claim 1, wherein the extruding cylinder for extruding the mud material on the pallet and the mud material cutting cylinder for cutting the mud material on a conveyor are operated intermittently to cut the mud material on the conveying path. Characteristic method of loading mud material into blast furnace mud gun. 3. An extruding cylinder for intermittently extruding a mud material on a pallet, a cutting cylinder for cutting out the mud material extruded by the extruding cylinder one by one into a conveyor, and a mud material conveyed by the conveyor. To a blast furnace mud gun comprising a sensor for detecting the number of mud materials based on a detection signal from the sensor, and a determining means for determining whether or not the set number has been counted within a set time and outputting the same. Mud loading device.