(1) First, coated kaolin and titanate coupling agent were put into high-speed heating mixer for modification. The optimum technological conditions are as follows: the ratio of modifier to mineral powder is 3:100, the temperature of modification is 30 degrees Celsius, and the heart time is 80 minutes.
(2) 400 g newsprint was purified, impurities removed and soaked. Put in the high shear emulsifier, add 26267g of water, and make the fibre pulp with 1.5% pulp concentration by beating equipment. (3) It is weighed that the modified kaolin of 100g is put into the measuring cylinder with a small amount of water in the vector cylinder, covered with glass plug, and oscillated violently (the purpose of this is that if the modified kaolin is directly added into the slurry, a large amount of white smoke will be produced during the compounding process, resulting in the loss of the modified kaolin and system error). 。 (4) The stabilizer and surfactant with good weight are added to the beaker containing 98.6g water, and the solution is heated. When the temperature is 75-80 degrees Celsius, the pH value of the solution is adjusted to 2-3 with hydrochloric acid to prepare the emulsifier aqueous solution. (5) the emulsifier water solution is all injected into the mixing cylinder, and then the molten asphalt is slowly injected into the mixing cylinder. When the asphalt is completely injected, the speed of the emulsifier is adjusted to 4000r/min, and the machine is stopped and made into asphalt emulsion. (6) the modified kaolin is first injected into the fiber pulp. After being completely injected, the high shear emulsifying machine is started to make the modified kaolin and lignocellulose compound 20min. Then the asphalt emulsion is injected into the slurry, and the 5min is mixed into the filter bag. The composite slurry is poured into the filter bag, and the water is removed by using a dehydrator, and then granulated by a granulator. 。 (7) The formed particles are baked for 5H in 601-2 type electrothermal constant temperature drying oven at 125 degrees Celsius. After removing moisture, the samples of granular fibers are taken out. |
