Phenolic resin composition for stemming, preparation method of composition and stemming
A technology of phenolic resin and composition, which is applied in the field of refractory materials, can solve the problems of long clay hardening time, unfavorable blast furnace smelting, and taphole splashing, etc., and achieves the effect of good opening performance, low cost, and improved moisture retention performance
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[0033] Correspondingly, the invention provides a kind of preparation method for the phenolic resin composition of gun clay, comprising:
[0034] Mixing 30%-50% by weight of thermosetting phenolic resin, 5%-20% by weight of organic solvent and the remainder of carbon-containing organic binder to obtain a phenolic resin composition for gun putty.
[0035] In the embodiment of the present invention, each raw material is weighed according to the above weight percentage, and then the raw materials are mixed and stirred evenly to obtain the phenolic resin composition for gun clay.
[0036] In the present invention, the form of the thermosetting phenolic resin is liquid, and its viscosity at 25°C is preferably 2000mPa·s~16000mPa·s, more preferably 2500mPa·s~15000mPa·s, which can suitably improve the hardening of the gun putty rate. The present invention has no special limitation on the source of the thermosetting phenolic resin, which can be purchased from the market or prepared by ...
Embodiment 1
[0053] According to the molar ratio of 1:1.5:0.01, add phenol, formaldehyde, and sodium hydroxide into the reaction kettle, stir, and heat to 60°C for reaction. After constant temperature for 4 hours, distill under reduced pressure at 60°C to the viscosity of the resin at 25°C It is 15000mPa·s, and a thermosetting phenolic resin is obtained.
[0054] According to the weight ratio of 40:20:40, the thermosetting phenolic resin is mixed with ethylene glycol and tar to obtain a phenolic resin composition for gun clay.
[0055] The quality index detection of the phenolic resin composition showed that the viscosity at 25°C was 2800mPa·s, the water content was 2.5%, and the curing time at 135°C was 17.5min.
Embodiment 2
[0057] According to the molar ratio of 1:2.5:0.02, add phenol, formaldehyde, and barium hydroxide into the reaction kettle, stir, and heat to 70°C for reaction. After constant temperature for 3 hours, distill at 70°C under reduced pressure to the viscosity of the resin at 25°C to 10000mPa·s to obtain a thermosetting phenolic resin.
[0058] According to the weight ratio of 30:10:60, the thermosetting phenolic resin is mixed with glycerol and anthracene oil to obtain a phenolic resin composition for gun clay.
[0059] The quality index test of the phenolic resin composition showed that the viscosity at 25°C was 3700mPa·s, the moisture content was 2.9%, and the curing time at 135°C was 16.3min.
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