The closed circulating cooling water system is adopted for induction furnace. The cooling water of the sensor shall be clean without impurities, the solid content shall not be greater than 10mg/l, and the water resistivity shall be greater than 2.5 * 10. Because the water with high hardness contains a large amount of insoluble salts, it is easy to precipitate and form scale, so the total hardness shall not be greater than 2.8mg/l, and the content of nitrite and chlorides shall not be greater than 50mg/l, The cooling water should be soft water with low hardness, and distilled water is better used to minimize the formation probability of scale.

The closed circulating cooling water system is adopted. The system has a secondary circulating water system, the outer circuit is an open circulating water system, and the internal circuit is a closed circulating water system. During the period, the water water water heat exchanger transmits heat. The internal circulation adopts soft water and distilled water, which is convenient for water quality management, high reliability of the system, low operating cost and low water quality requirements of the external circuit. Therefore, the service life of the sensor can be greatly improved.

Strictly control the temperature of circulating water in the induction coil. The temperature of circulating cooling water directly affects the working temperature and resistance of coil, and has a great influence on copper loss of induction furnace. If the water enters the water, the outlet water temperature is too low, the cooling of circulating water will consume a lot of energy and will also take away the heat from the furnace body to increase the power consumption; if the water temperature is too high, it will not be conducive to the cooling of the induction ring and increase the power consumption. Therefore, it is an important link to choose a good cooling water temperature. The water temperature of the cooling water should be controlled at a constant temperature. The water temperature of the water inlet is generally 20-30c, and the outlet water temperature is 50c.

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