KR20040074353A - Iron ore moisture determination device and its determination method - Google Patents

Abstract

PURPOSE: A method and an apparatus for measuring moisture of iron ore are provided to automatically stop an operation of equipment when equipment has a fault during a test operation of the iron ore moisture measurement apparatus. CONSTITUTION: An iron ore moisture measurement apparatus includes a specimen conveying robot(42), which moves along a three-axis orthogonal coordinate so as to convey the specimen, and an auto loader having a motor(40) and a cylinder(41). A metering unit(46) is provided in order to measure a weight of iron ore. Iron ore having moisture therein is dried in a drying chamber(47). A main frame includes a specimen retrieving unit(43) for receiving iron ore transferred thereto from the metering unit(46), a hopper(44) for controlling an amount of iron ore and a dust cover(45).

Description

Iron ore moisture measurement device and its measuring method {Iron ore moisture determination device and its determination method}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an iron ore moisture measuring apparatus and a method for measuring the same, and more particularly, to an apparatus for automatically measuring the moisture of iron ore transferred to a belt conveyor of a steel mill.

In the steelmaking process, the main raw material is coke, and the most important factor in charging the coke in the blast furnace is the content of water contained in the coke. Accurate measurement of the moisture content in the coke enables the prediction of furnace heat in the blast furnace and facilitates the adjustment of the ratio of iron ore and coke to reduce the temperature variation of the molten iron. Therefore, the coke moisture meter is recognized as a very important facility.

Conventionally, there was a moisture measuring device and a measuring method for measuring the content of water contained in the coke as described above, will be described with reference to FIG.

1 is a moisture detection device for detecting fuel moisture on a conveyance belt conveyor 16 by mounting a radiation generator 11 for generating radiation and a radiation detector 15 for detecting radiation output from the radiation generator 11; An input / output device 21 for inputting a basis weight value, automatic / manual mode selection and setting of a moisture effective range, and outputting a moisture value from the moisture controller 19 to the screen; A moisture analysis controller for amplifying a detection signal from the moisture detection device; An A / D converter for converting the output signal of the moisture analysis controller into digital; A raw material controller (PLC) 18 which accumulates and averages the digital data through the A / D converter for each charge and stores the average, and calculates an average amount of water for a predetermined charge; A D / A converter for converting the digital data of the raw material controller 18 into an analog signal; A basis weight controller 20 which automatically controls basis weight of fuel based on the total average amount of water through the D / A converter when the automatic mode is selected through the input / output device 21; The moisture measuring apparatus provided with this is shown.

The water detection device installed in the intermediate portion of the conveying belt conveyor 16 includes a support frame 12 for supporting the detection device; A pivot frame (14) supported by the support frame (12) and having a pivoting function and including upper and lower arms; A high pressure swing motor 13 for turning the swing frame 14 according to the control of the moisture controller 19; A housing 10 fixed to the upper arm of the revolving frame 14; A radiation generator (11) mounted to the housing (10) to generate radiation downward; A radiation detector (15) fixedly mounted to the lower arm of the pivot frame (14) to detect radiation from the radiation generator (11) and provide it to the moisture controller (19); It is provided.

In the method for controlling the continuous measurement of water in blast furnace fuel, the method comprises the steps of: continuously detecting a water value of the fuel for a current charge and outputting the detected value to a screen; A second step of accumulating and averaging the detected values of the first step; A third step of proceeding to the next step if the current charge number is the last charge of the set number of charges, or proceeding to the first step; A fourth step of obtaining an overall average value of the moisture values in the second step; A fifth step of replenishing fuel for the next charge based on the moisture value in the fourth step when the automatic mode is selected to compensate for the moisture; Determining whether there is a manual mode selection and proceeding to the first step if there is no selection, and ending the measurement if there is a selection; Characterized in that made.

However, the conventional moisture measuring apparatus as described above is well shown in Korean Patent Laid-Open Publication No. 2001-0058076 and Korean Utility Model No. 2000-0011687, which are automatically stopped in the event of a facility failure during an automatic test and an alarm device or a warning light is operated. There is no function and the operator cannot respond quickly. In addition, since there is no function of managing and storing the measured data, there is a problem of data storage of data.

Therefore, the present invention is to solve the problems of the prior art as described above, when there is an abnormality of the equipment during the automatic test of the iron ore moisture measuring device is automatically stopped, and the action to promptly notify the worker by alarm or warning lights It aims to be possible and to have a function to manage and store measured data.

1 is a moisture measuring apparatus of the prior art

2 is a method for measuring iron ore moisture of the present invention

3 is an iron ore moisture measuring apparatus of the present invention

(Explanation of symbols for the main parts of the drawing)

10: housing 11: radiation generator

12: support frame 13: high-voltage swing motor

14: swing frame 15: radiation detector

16: transfer belt conveyor 17: belt conveyor drive

18: raw material controller 19: moisture controller

20: basis weight controller 21: input and output device

30: Beam 31, 41: Cylinder

32: container 33, 44: hopper

34, 43: sample recovery device 35: robot arm

36, 46: precision measuring instruments 37, 47: drying chamber

38: Belt 40: Electric Motor

42: sample transfer robot 45: dust cover

The above object of the present invention is to automatically stop when there is an abnormality of the equipment during the automatic test of the iron ore moisture measuring device, to notify the operator by an alarm device or warning lights and to take action, and to manage and store the measured data It is achieved by a moisture measuring device and its measuring method.

Details of the above object and technical configuration of the present invention and the effects thereof according to the present invention will be more clearly understood by the following detailed description with reference to the drawings showing preferred embodiments of the present invention.

Figure 2 shows the iron ore moisture measuring method according to the present invention.

Figure 2a shows a first step of positioning the moisture measuring device at the origin of the work line as a moisture measurement work preparation process.

2b shows a beam 30 which can be operated up and down of the moisture measuring device by operating a cylinder 31 attached below the beam 30 up and down to store a certain amount of iron ore. (2) shows a second step in which the above operation is reversed.

2C shows that the container 32 containing the iron ore moves left and right to reach the position of the hopper 33 to operate the cylinder to pour the iron ore into the hopper 33. At this time, the hopper 33 is used to control the amount to some extent. Then, the third step is shown in the container attached to the sample recovery device 34 of the amount controlled by the hopper 33 (about 1 kg), and the robot arm 35 retreats.

FIG. 2d illustrates a fourth step of controlling the load cell device associated with the robot to measure the weight of the iron ore after the robot arm is moved forward or backward to open the dust cover of the precision measuring device 36.

FIG. 2E shows a fifth step of controlling the drying roll device associated with the robot to dry the iron ore for about 20 minutes after opening the dust cover of the drying chamber 37, and the robot arm picks up the container and moves backwards.

FIG. 2F shows the weight of the dried iron ore after moving back to the load cell of the precision measuring instrument 36 to open the dust cover of the precision measuring instrument 36 in order to measure the weight of the dried iron ore container. The sixth step of collecting and measuring the weight of moisture is shown.

FIG. 2g shows a seventh step in which the robot is placed in its original place with the completed iron ore container and rotates the sample recovery device 34 to slide the iron ore and drop it onto a belt located below. .

In the apparatus according to the present invention, moisture measurement is performed using one of the above steps. The apparatus is operated under the following conditions.

First is the equipment condition. A three-phase AC supply voltage of 440 V and a frequency of 60 Hz and a control power supply of 220 V AC and 24 V DC are to be provided.

Second is site conditions. Temperatures ranging from 0 degrees Celsius to 37.9 degrees Celsius, with weather conditions of an average of 13.2 degrees Celsius and 24 hours of continuous operation.

Third, basic design conditions. Moisture is measured by weight before and after drying the iron ore being transported. At this time, the operation mode should be able to work in the automatic mode or the operation mode, and the time taken to measure the water content of 1 kg of iron ore once should be 30 minutes.

Fourth, it is a facility configuration condition. In case of equipment failure during the automatic test, the apparatus of the present invention is automatically stopped and the operator can be notified by an alarm device or a warning light to take action. In this case, the automatic operation is driven by a programmable logic controller (PLC), and the operation is possible by the operation panel. The operating mode should be able to work in automatic mode or manual mode.

The apparatus designed and configured under the conditions of the present invention is configured as shown in Figure 3, the sample transfer robot 42 for moving the sample moving in three orthogonal orthogonal; An automatic loader consisting of an electric motor 40 and a cylinder 41 capable of rotating the container to allow the sample transfer robot to transfer the sample to left and right or up and down; Precision measuring instrument 46 for measuring the weight of iron ore or iron ore dried water; A drying chamber 47 for drying iron ore; A main frame composed of a sample recovery device 43, a hopper 44, and a dust cover 45; It is provided with. The sample recovery device 43 is a device for recovering the iron ore weighed in the precision measuring instrument, the hopper 44 is a device for controlling the amount of iron ore to measure the weight. In addition, the dust cover 45 is a device for preventing dust from occurring when the iron ore is weighed out of the cover.

Therefore, the iron ore moisture measuring apparatus and the measuring method of the present invention has the following effects.

First, during the automatic test, if the equipment is abnormal, it will be stopped automatically and the operator can be notified by alarm or warning light.

Second, the measured data can be managed and stored.

Third, the fully automatic operation is driven by the PLC, and can be operated by the operation panel.

Fourth, the operation mode allows to work in automatic mode or manual mode.

Claims (5)

In the moisture measuring method, Positioning the moisture measuring device at the origin of the work line; The beam 30 of the moisture measuring device operates downward to operate a cylinder 31 attached below the beam 30 to contain a predetermined amount of iron ore in the container 32, and then the above operation is performed. A second step in reverse order; A third step in which the container 32 moves from side to side to reach a position of a hopper 33 to operate the cylinder 31 to pour the iron ore into the hopper 33; A fourth step of controlling the load cell device associated with the robot to move the robot arm 35 forward or backward to open the dust cover of the precision measuring instrument 36 and then measure the weight of the iron ore; A fifth step of opening the dust cover of the drying chamber 37 and then moving to the drying chamber 37 to dry the iron ore; A sixth step of measuring the weight of moisture by measuring the weight of the dried iron ore after collecting the dust cover of the precision measuring instrument 36 and collecting data before and after drying; And The robot has a sample recovery device 34 and is located in its original place, and slides iron ore and drops it onto a belt 38 located below. Iron ore moisture measurement method characterized in that consisting of Iron ore moisture measuring device characterized in that the moisture is measured by the method of claim 1 In the moisture measuring device, A sample transfer robot 42 for moving a sample while moving in three orthogonal axes; An automatic loader comprising an electric motor 40 capable of causing the sample transfer robot 42 to convey a sample and a cylinder 41 capable of rotating the container; A precision measuring instrument 46 for measuring the weight of the iron ore or the iron ore dried with water; A drying chamber 47 for drying the moisture-containing iron ore; And The sample collection device 43 for recovering the iron ore weighed by the precision measuring instrument 46, the hopper 44 for controlling the amount of iron ore to be weighed and the dust generated when the weight of the iron ore comes out of the cover Main frame consisting of dust cover 45 to prevent Iron ore moisture measuring device, characterized in that provided The method of claim 3, wherein The sample transfer robot 42, the automatic loading machine, the precision measuring instrument 46, the drying chamber 47 and the main frame are operated by a fully automatic operation by a programmable logic controller (PLC), and are automatically stopped in the event of a malfunction. Iron ore moisture measuring device The method of claim 4, wherein The PLC is iron ore moisture measuring device, characterized in that the action to be alerted to the worker by warning devices or warning lights in the event of facility failure