KR20020020349A - Detection apparatus of mixed metal in transferring fuel ore - Google Patents

Abstract

PURPOSE: An apparatus for detecting metals mixed in fuel and raw materials for a blast furnace is provided which promptly and accurately grasps positions of metal fragments by detecting metal fragments mixed with raw iron ore on a transfer conveyor and displaying distances per positions of the metal fragments with light marking bars. CONSTITUTION: The apparatus for detecting metals mixed in fuel and raw materials for a blast furnace comprises a metal fragment detection sensor(15) for detecting metal fragments mixed into fuel and raw materials transferred through a belt conveyor(10); a belt speed detector(46) and an encoder(45) which are mounted on a return belt so as to produce pulse signals according to a transfer speed of the belt; light marking bars(48) which are continuously installed along the belt conveyor line with spaced apart from each other in a certain distance so as to display current transfer positions of the detected metal fragments in real-time; an operation controller(40) which calculates real-time information on positions of the metal fragments by counting up pulses inputted from the encoder(45) in case that metal detection is inputted from the metal fragment detection sensor(15); and a light marking bar driving part(47) which outputs sequential lighting control signals to the light marking bars(48) that are installed along the belt line by receiving outputs of the operation controller(40).

Description

Detection apparatus of mixed metal in transferring fuel ore

The present invention relates to a device for detecting metal fragments mixed into a blast furnace lead and a belt conveyor of a raw material transport facility. The present invention relates to an apparatus for detecting mixed metals in fuel and raw materials for blast furnaces, which enables the facility operator to accurately detect the position of the detected iron piece through the marking light bar.

In general, the ore and coke to be injected into the blast furnace to produce molten iron are screened in a particle size sorter at the bottom of eight reservoirs, each of which has a certain size or more, and is weighed in a basis weight hopper into a BELT CONVEYOR. Transfer.

When iron ore and coke are granulated in a storage tank for transfer of lead and raw materials using a conveyor, pieces of metal or metal contained in lead and raw materials, or pieces of metal dropped from the screen or basis hopper are dropped onto the belt conveyor and placed on the belt conveyor. It may cause damage or blockage of the headsuit of the belt conveyor.

In order to prevent this, a metal detector is fixedly installed in a belt width direction in a lump ore transport belt conveyor for transporting iron ore and coke to a relay storage tank of a blast furnace. This monitors whether there are any metal pieces introduced into the lead and the raw material on the belt conveyor continuously in the normal operation mode.

If the metal is detected by the metal detector while the metal is introduced into the smoke and raw material on the belt conveyor and transported together with the lump coal, the metal detector stops the belt conveyor and alerts the driver to perform the metal piece removal operation. This prevents the head chute of the belt or the belt conveyor from being damaged.

However, the above-described conventional transport and detection of metal pieces in the fuel and the removal work are not simple. As shown in FIG. 1, the belt conveyor 10 carried by the carrier roll 11 has an iron belt to prevent dust scattering that may occur during inflow of rainwater from the outside or transfer of fuel or raw material 13. The cover 20 is closed. Therefore, in order to detect the metal iron pieces in the raw material, the metal piece detection device 15 detects the metal pieces 22 and removes the metal pieces only in a limited section in which the cover of the belt conveyor is not provided.

Therefore, conventionally, it takes a lot of time to find the iron pieces contained in the raw material and the like, and the iron pieces buried in the coal mine hard to find it difficult to detect and remove the metal pieces in a wide range of places.

Such detection and removal of metal pieces in the feedstock thus far has resulted in a reduction in the work load and work efficiency. Furthermore, due to the difficulty in removing metal pieces and detection errors, equipment accidents such as clogging of the chute or damage to the belt conveyor are caused. It even stopped the continuous operation of.

An object of the present invention is to detect the metal pieces mixed with the raw iron ore in the conveying conveyor of the blast furnace input raw material and to appear as a distance and marking light bars for each position, thereby instructing the driver to quickly and accurately determine the position of the metal pieces. An object of the present invention is to provide an apparatus for detecting mixed metals in fuel and raw materials.

1 is a schematic view showing a conventional metal detection apparatus.

2 is a control block diagram of the mixed metal detection apparatus in the raw material according to the present invention.

3 is a diagram illustrating a configuration of an encoder device for calculating a position of mixed metal in a raw material and an installation position thereof according to the present invention.

※ Code explanation about main part of drawing ※

10 belt conveyor 11: carrier roll

12: Return roll 13: Raw material (fuel)

15: metal detection sensor 20: cover

22: mixed metal body 40: operation control unit

41: metal piece position display section 42: belt speed display section

43: hard part 44: converter

45: encoder 46: belt speed detection device

46a: contact roll 46b: embossed protrusion

47: marking light bar drive unit 48: marking light bar

60: lighting lamp driving unit 62: lighting lamp

The present invention for achieving the above object is a belt for detecting the metal piece mixed in the lead, the raw material conveyed through the conveyor belt, and a belt mounted on the return belt to generate a pulse signal according to the conveying speed of the belt A speed detection and encoder device, a marking light bar continuously installed at a predetermined interval along the belt conveyor line to display the current moving position of the detected metal piece in real time, and a metal detection input from the metal piece detection sensor, if present. A calculation control unit for counting up an input pulse to calculate real-time position information of the metal piece, and a marking light bar driving unit for receiving the output of the operation controller and sequentially outputting a control signal to the marking light bar installed along a belt line. It is characterized by.

The present invention will be described with reference to the accompanying drawings.

Figure 2 shows a block diagram of a metal scrap detection device mixed with blast furnace fuel or raw material according to the present invention.

As referred to herein, the metal piece detection sensor 15 is installed across the conveying direction on the inlet side of the belt conveyor 10 to detect that the metal piece is mixed in the fuel or raw material to be introduced into the blast furnace.

A belt speed detecting device 46 is installed at the lower part of the return side of the belt conveyor 10, and a marking light bar 47 is continuously installed at a predetermined interval (for example, about 0.5 m) along the belt conveyor line. do. In addition, the inner side of the belt conveyor 10 is provided with a plurality of illumination lamps 62 for illumination during work such as metal piece extraction.

The metal piece detection signal included in the raw material or fuel being transferred detected by the metal piece detection sensor 15 is connected to be applied to the operation control unit 40.

The arithmetic control unit 40 has a light warning unit 43 for informing the detection result when the metal piece is detected and an illumination lamp driving unit 60 for generating an on / off control signal for driving the lighting lamp 62. It has a metal piece position display portion 41 and the belt speed display portion 42 to receive and display the time-shifted position value of the detection metal piece according to the speed of the belt conveyor calculated in the.

The actual position value on the time axis of the detection metal piece output from the operation control unit 40 is connected to be provided to the marking light bar driver 48 for sequentially driving the marking light bar 47.

The belt speed detected by the belt speed detecting device 46 is connected to the encoder 45 and the converter 44 so that a current component of 4 to 20 mA is converted into a pulse signal and provided to the operation control unit.

3 illustrates a specific structure of the belt speed detecting device 46 and its installation position of the present invention. As referred to herein, the belt speed detecting device 46 is inserted in the width direction at the side end of the return of the belt 10 to be fixed by the fixed base 46d, but has sufficient contact resistance necessary for reliable speed detection. Install it down to the ground about 10 ~ 15 degree to get.

The belt speed detecting device 46 is made in the form of a cylindrical drum and converts linear motion into rotary motion to provide a contact roll 46a at one end for measuring the movement distance, and along the central axis 46c of the central axis. On the opposite side of the extension is mounted an encoder 45 which generates a pulse signal per revolution. In addition, in order to secure the reliability of the distance measurement by increasing the contact resistance of the belt, an embossed projection 46b coated with raw rubber is formed on the drum surface of the cylindrical contact roll 46a.

Referring to the operation of the present invention configured as described above is as follows.

First, when the conveyor belt 10 is automatically operated, the metal piece is detected by the metal piece detection sensor 15 when the metal piece is mixed in the fuel or raw material being conveyed. The detection signal is sent to the lighting lamp driver 60 and the warning lamp 43 through the operation control unit 40 to drive or light the lighting lamp 62 for the operation of the warning lamp and the illumination in the belt line.

The lighting lamp 62 provides lighting required to remove the metal pieces contained in the fuel or raw material being transferred.

On the other hand, when the detection signal is input from the metal piece detection sensor 15, the operation control unit 40 counts the pulse signal of the encoder input through the conversion unit 44 and applies the calculation to the movement speed value of the given belt. A sequential transfer position of the metal piece is calculated from the installation point of the metal piece detection sensor 15. At this time, the encoder 45 generates a pulse signal proportional to the rotational speed of the contact roll 46a of the belt speed detection device 46 installed in close contact with the lower portion of the return side of the belt.

The position of the detected metal piece on the time axis thus calculated is output to the metal piece position display section 41 and displayed as a simulation value. In addition, the belt speed display unit 42 displays the speed of the belt.

In addition, the position information of the detection metal piece being mixed in the raw material outputted from the arithmetic and control unit 40 is provided to the marking light bar driver 48 so that the marking light is installed along the belt line at regular intervals by the sequential output of the marking light bar driver. The bar 47 lights up sequentially.

Therefore, the operator can recognize that the metal piece is present in the raw material or fuel currently being transported by the driving of the light lamp and the lighting of the lighting lamp 62, and the position of the metal piece through the lighting position of the marking light bar 47. Because it is possible to predict the metal pieces from the raw material can be extracted quickly and accurately. When the driver or the worker pulls out the metal piece on the belt, the operation control unit 40 performs a reset and automatically turns off the lighting lamp.

In particular, the information of the metal pieces mixed into the raw material or fuel being transported is provided to the system manager through the metal piece position display unit 41, thereby enabling remote control management of the system. In addition, the metal piece detection information is transmitted to the SCC via the PLC, thereby enabling centralized control management and monitoring of the operation site situation on the center side.

Immediately when the metal piece detection sensor 15 is operated, the conveyor belt 10 is gradually reduced in speed according to the belt speed control signal and stopped at the metal piece extraction work position point.

To this end, in the belt stop speed detecting device 46 provided between the return rollers of the conveyor belt 10 in order to calculate the distance according to the stop signal of the belt 10, the rotational driving amount of the distance measuring contact roll 46a. In accordance with this, the central axis 46c is driven to rotate, and at the end of the central axis 46c, the converter 44 digitally converts the pulse signal 4 to 20 mmA generated by the encoder 45 for measuring the amount of rotation of the number of axes. Is changed to the operation control unit 40 to be sent.

The metal piece position display unit 41 displaying the position of the metal piece is displayed numerically so as to be easily understood by the driver or manager at 0.5 meter intervals. In addition, the distance value is again set by the light-emitting lead lamp of the marking light bar 47 provided at a constant interval (about 0.5 meter intervals) so that the operator can easily see where the detected metal piece is located on the conveyor belt 10 of the long-term extension. Is displayed. In addition, the FLICKER can be performed for a predetermined time so that the identification can be performed both day and night.

According to the present invention as described above, the position of the detection metal piece is confirmed by the metal piece detection sensor, and then the position of the metal piece is accurately displayed on the monitor of the control panel through the belt speed detection and encoder, and the position of the metal piece is displayed on the belt. By flashing the lead lamp of the marking light bar installed at a certain distance along one side along the longitudinal direction, the driver can draw out or monitor the metal pieces mixed into fuel or raw material more quickly and safely. The effect is to prevent downtime in advance.

Claims (6)

A metal piece detection sensor 15 for detecting a metal piece mixed in fuel and raw material conveyed through the belt conveyor 10; A belt speed detecting device 46 and an encoder device 45 mounted to the return belt to generate a pulse signal according to the conveying speed of the belt; A marking light bar 47 continuously installed at a predetermined interval along the belt conveyor line to display the current moving position of the detected metal piece in real time; An arithmetic and control unit 40 for counting up pulses input from the encoder device to calculate real-time positional information of the metal pieces when there is a metal detection input from the metal piece detection sensor; And a marking light bar driving unit (48) which sequentially outputs a control signal to the marking light bar installed along the belt line in response to the output of the operation controller. According to claim 1, wherein the operation control unit 40 is a beacon driving light warning unit 43 and work light lamp driving lighting lamp for recognizing the operator when the metal piece detection signal is input from the metal piece detection sensor 15 An apparatus for detecting mixed metals in fuel and raw materials for blast furnaces, characterized in that the drive unit (60) is connected. According to claim 1, The belt speed detecting device 46 is made in the form of a cylindrical drum and converts the linear motion into a rotary motion to prepare a contact roll 46a for measuring the movement distance at one end, the center of the central axis On the other side extending along the axis (46c) on the opposite side is an encoder 45 for generating a pulse signal per revolutions is configured to detect the mixed metal in the fuel and raw material for the blast furnace. 5. The blast furnace fuel and raw material mixture according to claim 3, characterized in that the contact roll (46a) is formed with embossed projections (46b) coated with raw rubber on the drum surface to increase the contact resistance with the belt. Metal detection device. The blast furnace for a blast furnace according to claim 1, wherein said calculation control section (40) is connected with a metal piece position display section (41) for displaying the position value of the detected metal piece output from said calculation control section as a digital value (number). Device for detecting mixed metals in fuel and raw materials. The blast furnace fuel and raw material mixed metal detection device according to claim 1, characterized in that the calculation control section (40) is connected to a belt speed display section (42) for displaying the speed value of the belt output from the calculation control section. .