Ways to improve the life of RH furnace lining

1.Different steel grades, such as ultra-low carbon steel and low carbon steel, have different refining processes and conditions, and the requirements for refractory materials of furnace lining are also different. It is recommended that steel mills concentrate different steel grades in different furnaces in order to select the appropriate refractory material according to the refined steel grade.

2.The corrosion mechanism of different parts of the RH furnace is different. Therefore, the appropriate refractory raw material should be selected according to the specific conditions of different parts during refining, and the integrated furnace should be carried out.

3.Control the refining temperature, do not exceed 1650 °C.

4.Improve the use efficiency of the RH refining furnace, increase the daily refining furnace times, shorten the intermittent time, and adopt insulation measures during the interval to reduce the temperature fluctuation in the furnace.
5.Monitor the erosion of the dip tube and perform spray repair during the rest period between the two furnaces. Increasing the life of the dip tube and reducing the number of times the dip tube is replaced can reduce the structural spalling caused by the large temperature fluctuation in the lower part of the vacuum chamber.
6.When replacing the dip tube, the lower part of the vacuum chamber, the bottom of the furnace, the throat and other parts can be sprayed and repaired immediately, or the ramming material can be filled in the throat to be repaired.
Changxing refractory provides refractory products, calcium silicate products, castable & mortar, china refractory brick, ceramic fiber felt, ladle & tundish nozzle, ceramic fiber with high quality for you. Such as high alumina refractory bricks, magnesia carbon brick, clay refractory bricks and other refractory products.
Article Source:Ways to improve the life of RH furnace lining
Company name:Henan Xinmi Changxing Refractory Materials Co.,Ltd
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Precautions for medium frequency furnace charge

Firstly,Ultra-high-strength lightweight ramming mass should be mechanically stirred when mixing, and forced concrete mixing should be used. Mixers, upper hoppers, weighing containers, etc. should be cleaned. The mixing time and the amount of liquid to be added shall be strictly in accordance with the instructions for the construction of the medium-frequency furnace neutral refractory material in the medium-frequency furnace.

Second, the mechanical equipment should be installed firmly, and the distance between the mechanical equipment and the pouring place should be as short as possible. Mechanical equipment should be used after inspection and adjustment.

Thirdly, Ultra-high-strength lightweight ramming mass must be measured according to the mixing ratio. The scales, measuring cups and measuring cylinders used must be verified by calculation. The various appliances used in the various construction stages of the ramming mass must be in good condition and kept clean.

Changxing refractory provides refractory products, calcium silicate products, castable & mortar, china refractory brick, ceramic fiber felt, ladle & tundish nozzle, ceramic fiber with high quality for you. Such as high alumina refractory bricks, magnesia carbon brick, clay refractory bricks and other refractory products.
Article Source:Precautions for medium frequency furnace charge
Company name: Henan Xinmi Changxing Refractory Materials Co.,Ltd
Email: sales1@chinafirebrick.com
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Maintenance of ramming mass for EAF bottom

1.The slag resistance of EAF bottom ramming mass is not very good, ensure slag line above the slope when charging scrap.

2.If there is pit on the bottom, lean the furnace backwards, use compressed air to blow the remaining steel and slag onto the slope, after furnace cooled down, fill the pot with ramming mass and make it flat, then make it compact with pneumatic rammer. If there is pit on the slope, repair it with the same method.

3.If cold maintenance is not possible, mix ramming mass with water and then do a hot repair, press until it’s compact.

4.Daily maintain the water cooling components, if there is a water leakage, handle it in time to avoid the furnace to be affected with damp, which could cause serious accidents.

Changxing refractory provides refractory products, calcium silicate products, castable & mortar, china refractory brick, ceramic fiber felt, ladle & tundish nozzle, ceramic fiber with high quality for you. Such as high alumina refractory bricks, magnesia carbon brick, clay refractory bricks and other refractory products.

Article Source:Maintenance of ramming mass for EAF bottom
Company name: Henan Xinmi Changxing Refractory Materials Co.,Ltd
Email: sales1@chinafirebrick.com
Website:http://www.chinafirebrick.com/