The invention relates to a polycondensation production technology of
melamine moulding particles and
melamine moulding
powder. The technology comprises the following steps: 1. in the
slurry preparation phase, adding 55-65 parts of
formaldehyde, 3-5 parts of thinner and 3-5 parts of water in a
slurry reaction tank, heating and stirring, adjusting the pH value of
slurry to 8.0-8.5 at 50 DEG C, adding 35-45 parts of
melamine at 60 DEG C, heating for boiling to ensure the ratio of material to water to be 1:2, then performing cooling
water circulation to reduce the temperature of material to 30-40DEG C, adding additives of which each accounts for 5-8 parts, stirring evenly, filtrating to prepare the desired slurry; 2. in the
evaporation and polycondensation phase, adding the slurry in a vacuumwet
pelletizing reaction tank, stirring at high speed, adding additives of which each accounts for 3-5% and 30-40% of auxiliary material, heating the materials to 70 DEG C to perform
polymerization for 40min, breaking vacuum, reducing the temperature to 60 DEG C, discharging to obtain the finished melamine moulding particles; in addition, adding the melamine moulding particles in a grinder to
grind to obtain the melamine moulding
powder with the
fineness of 80-100 meshes. The sealing
production cycle is four hours, the charging
powder yield is 60%, the
water content of the finished product is3-5% and the cost of the finished product per
ton is reduced by 500-900 RMB.