Analysis of the cause of temperature control of steel wire annealing furnace. Factory Suppliers Manufacturers Quotes

Analysis of the cause of temperature control of steel wire annealing furnace.

Analysis of the cause of temperature control of steel wire annealing furnace.

(1) the temperature thermocouple is not fixed effectively, and it is often displaced by the vibration of the furnace during the annealing process. Survey found that the well type to protect gas annealing furnace temperature measuring thermocouple are mostly reserved for measurement from the furnace wall hole near terminal (annealing) into a certain length to the chamber of a stove or furnace, through the control to indirect control of furnace temperature furnace tank temperature. The thermocouple is usually simply fixed to the side wall of the furnace wall. The disadvantage of this method is that it can only limit the horizontal movement of the thermocouple to the furnace, because the inevitable collision of the furnace and the furnace can be transmitted to the thermocouple, resulting in the slippage of the thermocouple. The electric fitter can not be reset during the process of repairing the annealing furnace, which can also lead to the shift of the thermocouple. Annealing furnace run for a long time, disrepair, terminal basic active shield itself, can also lead to displacement of thermocouple, so that the actual temperature of annealing furnace is often higher than the set temperature, heating temperature time longer, and even cause serious oxidation burning loss annealed wire.井式退火炉 (4).jpg

(2) the effective working length of temperature measuring thermocouple during normal operation of annealing furnace is not enough, resulting in excessive temperature measurement error. Theoretically, thermocouple measuring WenDuan work only more than 100 mm in length, the temperature measurement error can meet the requirements (below 10 ), and is as long as possible. In fact, the installation method of the well type annealing furnace from the side wall of the furnace wall is confined to the working length of the thermocouple, and the actual installation is difficult to ensure the working length is greater than 100mm. Because of a long-running, annealing furnace refractory brick and mud loss, thermometer hole is often sundry jam, the effective length of work sometimes thermocouple in the chamber of a stove or furnace only 30-50 mm, at this time the temperature measurement error can be up to 50-100 . This is mainly due to the fact that the temperature is too short and the temperature sensitivity decreases.


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