Fire-resistant insulated cable containing calcined coal series kaolin
A technology of coal-based kaolin and refractory insulation, applied in the direction of insulated cables, insulated conductors, inorganic insulators, etc., can solve the problems of poor insulation, difficult molding, high water absorption of magnesium oxide, etc., to improve insulation, increase filling density, and improve refractoriness Effect
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Embodiment 1
[0020] Heat 9L of water to 45°C, add 9g of cellulose and 90g of paraffin oil (industrial grade) into the water and stir to dissolve; stir 35kg of calcined coal-based kaolin powder and 56kg of magnesium oxide powder in a stirrer for 8min, and spray the above aqueous solution Put it into the mixer to make the powder have certain humidity and cohesiveness;
[0021] The mixed powder material is pressed into a columnar porcelain column with a pressure of 8 kg by a column press;
[0022] Put the compressed ceramic column into the calciner and heat it at 1180°C for 3 hours, then cool it naturally to 40°C and release it from the furnace.
[0023] Put the porcelain column into the prepared tube blank (9 meters long) with copper as the outer sheath, and position it with a special core rod, and then penetrate the required core blank (10 meters) for repeated pulling , annealing, and sealing processes until the finished product. The porcelain column is transformed into a dense insulating...
Embodiment 2
[0025] Heat 5L of water to 40°C, add 4g of cellulose and 75g of paraffin oil (industrial grade) to the water and stir to dissolve; stir 30kg of calcined coal-based kaolin powder and 50kg of magnesium oxide powder in a stirrer for 6min, and spray the above aqueous solution Put it into the mixer to make the powder have certain humidity and cohesiveness;
[0026] The mixed powder material is pressed into a columnar porcelain column with a pressure of 9 kg by a column press machine;
[0027] Put the compressed ceramic column into the calciner and heat it at 1200°C for 2.5 hours, then let it cool naturally to 50°C.
[0028] Porcelain pillars are put into the prepared tube blank with copper as the conductor and outer sheath, positioned by a special core rod, and then penetrated into the required core blank, and undergo repeated drawing, annealing, and sealing processes until the finished product. The porcelain column is transformed into a dense insulating refractory body, which is ...
Embodiment 3
[0030] Heat 15L of water to 50°C, and add 7.5g of cellulose and 180g of paraffin oil (industrial grade) to the water and stir to dissolve; stir 40kg of calcined coal-based kaolin powder and 60kg of magnesium oxide powder in a stirrer for 7min, and mix the above aqueous solution Spray into the mixer to make the powder have certain humidity and cohesiveness;
[0031] Press the mixed powder material into a columnar porcelain column with a pressure of 10 kg by a column press;
[0032] Put the pressed porcelain column into the calcination furnace and heat and calcine at 1190°C for 2.7 hours, then cool naturally to 45°C and leave the furnace.
[0033] Porcelain pillars are put into the prepared tube blank with copper as the conductor and outer sheath, positioned by a special core rod, and then penetrated into the required core blank, and undergo repeated drawing, annealing, and sealing processes until the finished product. The porcelain column is transformed into a dense insulating...
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