Preparation process of submerged arc welding agent for gas station underground petroleum pipe
A technology of oil pipeline and submerged arc flux, which is applied in the direction of manufacturing tools, welding equipment, metal processing equipment, etc., can solve the problems that cannot be solved in the welding of buried oil pipelines, and achieve good performance effects
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Embodiment 1
[0012] Embodiment 1: a kind of preparation technology of submerged arc welding flux for underground petroleum pipeline of gas station, comprises the following steps:
[0013] In the first step, 1 g of cetylpyridinium chloride, 4 g of diacetone acrylamide, 2 g of polystyrene, 3 g of silicon dioxide, and 18 g of aluminum oxide are added to a blender and mixed and stirred evenly. The stirring time is 10 minutes and the stirring temperature is 30 °C, mixture A was obtained;
[0014] In the second step, transfer the mixture A into the reactor, add 4g of hydroxyethyl methacrylate and 3g of methylpyrrolidone, heat to 50°C under vacuum, stir for 20 minutes, then naturally cool to 55°C, and then add an appropriate amount of Calcium oxide, heat up to 70°C again, while keeping the vacuum constant at 1.3, stir for 30 minutes, drop to normal temperature, and obtain mixture B;
[0015] In the third step, 2 g of ethyl acetate and 3 g of tetrahydrofuran were added to mixture B, heated to 60°...
Embodiment 2
[0018] Embodiment 2: a preparation process of submerged arc welding flux for buried oil pipelines in gas stations, comprising the following steps:
[0019] In the first step, 2 g of cetylpyridinium chloride, 4 g of diacetone acrylamide, 3 g of polystyrene, 5 g of silicon dioxide, and 22 g of aluminum oxide are added to the mixer and mixed evenly. The stirring time is 22 minutes and the stirring temperature is 33 °C, mixture A was obtained;
[0020] In the second step, transfer the mixture A into the reactor, add 5g of hydroxyethyl methacrylate and 4g of methylpyrrolidone, heat to 55°C under vacuum, stir for 23 minutes, then naturally cool to 59°C, and then add an appropriate amount of Calcium oxide, heat up to 75°C again, while keeping the vacuum constant at 1.33MPa, stir for 39 minutes, and lower to normal temperature to obtain mixture B;
[0021] In the third step, 3 g of ethyl acetate and 5 g of tetrahydrofuran were added to mixture B, heated to 68° C. and stirred for 36 m...
Embodiment 3
[0024] Embodiment 3: A kind of preparation technology of submerged arc welding flux for buried petroleum pipeline in gas station, comprises the following steps:
[0025] In the first step, 3 g of cetylpyridinium chloride, 5 g of diacetone acrylamide, 5 g of polystyrene, 6 g of silicon dioxide, and 26 g of aluminum oxide are added to a blender and mixed evenly. The stirring time is 25 minutes and the stirring temperature is 40 °C, mixture A was obtained;
[0026] In the second step, transfer the mixture A into the reactor, add 6g of hydroxyethyl methacrylate and 4.2g of methylpyrrolidone, heat to 60°C under vacuum, stir for 25 minutes, then naturally cool to 65°C, and then add Appropriate amount of calcium oxide, heat up to 80°C again, while keeping the vacuum constant at 1.5MPa, stir for 45 minutes, drop to room temperature, and obtain mixture B;
[0027] In the third step, 4 g of ethyl acetate and 6 g of tetrahydrofuran were added to mixture B, heated to 60° C. and stirred f...
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