SU623097A1

SU623097A1 - Device for monitoring condition of melting unit lining

Info

Publication number: SU623097A1
Application number: SU731922483A
Authority: SU
Inventors: Александр Михайлович Котылев; Дмитрий Абрамович Гитгарц; Юрий Соломонович Иоффе; Александр Александрович Простяков
Original assignee: Предприятие П/Я Г-4696
Priority date: 1973-05-18
Filing date: 1973-05-18
Publication date: 1978-09-05

Description

Изобретение относитс к черной металлургии , конкретнее к контролю состо ни огнеупорной футеровки плавильных печей.The invention relates to ferrous metallurgy, and more specifically to the control of the state of the refractory lining of smelting furnaces.

Известны устройства дл контрол сое то ни футеровки плавильных агрегатов, содержащие установленные в футеровке На равном рассто нии от огневой поверхности электроды, блок измерени среднего значени проводимости футеровки, сое диненный последовательно с усилителем, измерителем напр жени и сигнализато ром .Devices are known for monitoring the lining of the melting units, which contain electrodes installed in the lining at an equal distance from the firing surface, a unit for measuring the average conductivity of the lining, connected in series with the amplifier, voltage meter and signaling device.

Недостатком известных устройств вл етс низка точность контрол , св занна с тем, что разрушение футеровки наступает за счет образовани в ней локалных трещин, а контролируетс только интегральный параметр - среднее значение проводимости футеровю.A disadvantage of the known devices is the low control accuracy due to the fact that the destruction of the lining occurs due to the formation of local cracks in it, and only the integral parameter, the average conductivity value of the lining, is controlled.

Цель изобретени состоит в повышении точности контрол . Это достигаетс тем, что предлагаемое устройство снабжено блоком спрецелени максимального значени проводимости футеровки, The purpose of the invention is to improve the accuracy of the control. This is achieved by the fact that the proposed device is equipped with a block for filtering the maximum value of the lining conductivity,

входы которого соединены с электродами, . а выходы - с блоком измерени среднего значени проводимости футеровки и с усилителем.the inputs of which are connected to the electrodes,. and the outputs with a unit for measuring the average conductivity of the lining and with an amplifier.

На чертеже изображена схема предлагаемого устройства.The drawing shows a diagram of the proposed device.

Схема включает источник питани 1, футеровку 2, электроды 3, блок 4 оппеделени максимального значени проводимости футеровки, блок 5 измерени среднего значени проводимости футеровки, усилитель 6, измеритель 7 напр жени и сигнализатор 8.The circuit includes a power source 1, lining 2, electrodes 3, block 4 of the maximum lining conductivity limit, block 5 of measuring the average lining conductivity, amplifier 6, voltage meter 7, and alarm 8.

Устройство работает следующим образом .The device works as follows.

От источника питани 1 протекает ток через следующую зёмкнутую измерительную цепь: расплавленный металл 9, участки футеровки 2, электроды 3, блок 4 определени максимального значени проводимости,- блок 5 измерени среднего значени проводимости.A current flows from the power source 1 through the following measuring circuit: molten metal 9, lining sections 2, electrodes 3, unit 4 for determining the maximum conductivity value, - unit 5 for measuring the average conductivity value.

Claims

The unit for determining the maximum conductivity value of the lining is made of equal in size resistor and diodes, the number of which is equal to the number of electrodes. At any given time, only a diode conducts current, the anode of which is connected to the lining section, the conductivity of which is of maximal importance. The unit of measurement of the average conductivity value of the scholpolien lining on a single resistor, the total of which less than the maximum number of times, is equal to the number of electrodes. Under normal lining conditions, the measuring circuit is equal to the same voltage across the resistors of the units for determining the maximal thinning and measuring the average conductivity of the lining. The control windings of the amplifier 6 are supplied with the output voltages of the units determining the maximum and average values of the conductivity, as well as the voltage of the smetzeni from the source of supply. The voltage meter monitors the voltage of the amplifier that is applied to the detector 8. In the case of a normal condition, a footer (H9k the conduction currents of the lining sections are equal or different by a small amount, and the magnetic fluxes of the amplification windings cancel each other out. the minimum voltage is e, the indicator is turned off. If a crack filled with metal appears in the non-eroded lining area, then the conductivity between the metal and the electrons closest to the cracks labor increases, causing an increase in the output voltage of the units for determining the maximum and measuring the average lining conductivity. The degree of voltage increase is different, so the output voltage of the amplifier is increased: When the lining is further destroyed, the output voltage of the amplifier reaches the trigger voltage of the detector { I give light and sound signals and turn off the floating aiv regatta. Formula of the invention A device for controlling the lining distance of the melting unit, containing electrodes installed in the wiring at equal distance from the opaya surface, the unit measuring the average conductivity of the lining, connected in series with the amplifier, and the voltage meter and signaling device, characterized in that it is equipped with a maximum determination unit to determine the accuracy of the control the conductivity values of the lining, the inputs of which are connected to the electrodes, and the outputs - with the unit for measuring the average conductivity value of the lining and with the amplifier.