Influence of Furnace Lining Material on Pre-furnace Temperature of Copper Alloy

Today, Luoyang Quantong Kiln Industry Co., Ltd. will take you to understand the effect of furnace lining on the temperature before the furnace of copper alloy:

The smelting temperature has a great influence on the quality of the ingot. If the temperature is too high, it will not only cause defects such as coarse grains, cracks, and segregation, but also promote the interaction between the metal and the furnace gas, slag, flux, and furnace lining. and evaporation loss, and promote metal inhalation; and if the temperature is too low, the slag removal effect of the melt will be reduced, and the ingot casting operation will be difficult. Therefore, it is very important to correctly control the melting temperature and select the furnace temperature. Therefore, the furnace lining is very important for copper alloys. The temperature control before the furnace is affected.

(1) Baking temperature

Generally, in induction furnace smelting, the temperature at which the melt is released is used as the casting temperature at the same time. The principles for determining the release temperature are: ① to ensure that the molten metal has a certain fluidity; ② to ensure the normal operation of the casting operation to prevent cold isolation, 3) Ensure that the gas precipitation during the solidification process of the melt, and various impurities can be smoothly floated up and discharged from the liquid cavity; 4) According to the casting characteristics of different alloys, try to ensure the normal operation of the casting operation. Choose low temperature.

When smelting copper and copper alloys in large and medium-sized cored induction furnaces, immersion thermocouples can be fixed in the furnace for continuous temperature measurement.

(2) Control of the temperature in front of the furnace

The temperature control of the furnace lining material in the induction furnace is divided into two control methods: indirect and direct.

The indirect control of temperature is generally accomplished by changing the voltage, current, and power applied to the inductor, that is, an automatic adjustment system of voltage, current or power is used.

Direct control of temperature, that is, an automatic control system with the temperature of the furnace lining as the direct control object. Generally, on the basis of automatic control of voltage or power, units such as temperature regulators, temperature transmitters and temperature setters are added. The simple automatic temperature control system is to send the temperature measuring thermocouple signal to the XCT moving coil temperature indicating conditioner, and the conditioner outputs the signal to the contactor, and then realizes the automatic temperature control.