SU627426A1 - Arrangement for automatic determining of iron content in ore material - Google Patents

Description

This invention relates to a rapid magnetic technique for determining the average content of magnetite iron in ore material.

A device for automatically determining the iron content of ore material on a conveyor is known, comprising an iron content sensor connected in series with a recording unit.

Its disadvantage is the insufficient accuracy of determining the content of the gel in the ore material, associated with the need to use graded tables to translate the readings of the device into the iron content and calculate the average iron content.

Closest to the proposed device for automatically determining the average iron content in the ore material, comprising an iron content sensor, a voltage-to-frequency converter, a pulse shaper and a recording unit, the first input

which is connected to the input of the pulse shaper.

A disadvantage of this device is the low accuracy of the determination of the iron content, which is associated with the non-identity of the readings of the device with the iron content in the ore material and the need to use calibration tables.

The purpose of the invention is to improve the accuracy of determining the iron content in the ore material.

Claims (1)

This goal is achieved in that a device containing an iron content sensor, a voltage-to-frequency converter, a pulse shaper and a recording unit, the first input of which is connected to the pulse shaper input, is connected in series with a frequency motor and a pulse counter, the first outputs of which are connected the second inputs of the registering unit, the second input of the pulse counter is connected to the output of the pulse former and the third input of the frequency divider, the second input of the last. it is connected with the output of the voltage converter to the frequency, as well as the driver of the time, the output is connected to the first input of the recording unit, the frequency divider tuning unit, the frequency divider whose input and output are connected to the second frequency output and the third frequency divider input, respectively and a switch of the reset bus, the input and output of the boiler are connected to the second output and p to the third input of the pulse counter, respectively, the output of the iron content sensor connected to the input of the voltage converter in frequency. FIG. 1 and 3 shows a structural electrical circuit | in fig. 2 shows the real and ideal calibration characteristics of the device. The device contains an iron content sensor 1 in the ore material, a voltage-to-pulse converter 2, a divider 3 frequencies, a pulse counter 4, a recording unit 5, a time interval generator 6, a pulse shaper 7, a frequency dividers division unit 8, and a bus switching unit 9 reset, Usgroyst0o works as follows: Sensor 1, installed under. a conveyor with iron ore material, produces a signal (analog voltage) proportional to the iron content of the ore material. This signal is converted by converter 2 to clock pulses. The pulses from the converter 2 during the time interval specified by the imaging unit 6, fill the divider 3 frequency and the counter 4 pulses. At the end of the time interval, the driver 6 generates a pulse, which overwrites the contents of the pulse counter 4 to the register unit 5 and, through the driver 7, resets the divider 3 frequencies and the account. Chik 4. Impulses. If the divider 3 divider ratio is fixed and the reset circuit is connected to the installation input zero of each trigger of counter 4, the device does not correspond to the debris content in the ore material, and the calibration characteristic corresponds to the real graduation characteristic A Bj (Fig. 2). The actual grading characteristic does not coincide with the ideal characteristic, as a result of which the value of the digital, reference device does not coincide with the content. iron in the ore. To transform a real grading 19 characterization AJ Bj, an ideal calibration characteristic of AZ B j can be, for example: - reduce the ordinates of points A and B so many times that the resultant reA B results from this line parallel to the line Aj - increase, ordinates i, 65 ; on the value of A Ai-B. The first operation can be easily performed with the help of block 8, the second with the self of block 9. After these operations are completed, the characteristic AJ Bjj is converted into an ideal characteristic and, therefore, the readings of the device correspond to the iron content in the ore material. Apparatus of the Invention A device for automatically determining the iron content in ore material, comprising an iron content sensor, a voltage-to-frequency converter, a pulse shaper, and a resetting unit, the first input of which is connected to the pulse shaper input, characterized in that increase the accuracy of the determination of iron content, serially connected frequency finder and pulse counter are entered into it, the first outputs of which are connected to the second inputs of the recording unit, the second One pulse counter is connected to the output of the pulse driver and the first input of the frequency divider, the second input of the latter is connected to the output of the voltage to frequency converter, and the time interval generator, the output of which is connected to the first input of the recording unit, the frequency divider tuning unit, input and the output of which is connected to the second output and to the third frequency divider is corresponding to the same, and the switch unit is reset, the input and output of which are connected to the second output and to the third input m pulse counter, respectively, with the output of the iron content sensor in the ore material of the compound with the input of the transducer into the purity. .one Codep / OHtJe / ((elase, / a fPue. 2