Humic acid composite material and preparation method thereof
A compound fertilizer and humic acid technology, which is applied in the directions of ammonium nitrate fertilizer, urea compound fertilizer, ammonium orthophosphate fertilizer, etc., can solve the problems of reducing product quality, rough particles, not easy to dissolve, etc. The effect of the content is not easy to fall off
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Embodiment 1
[0087] The weathered coal containing humic acid is crushed into 60-200 mesh powder, and dried to obtain humic acid. Then put it into a disc granulator, add 10% clay, sprinkle the surface of the material with clean water and rotate it to granulate to make spherical particles of 0.5-3mm, and put it into the drum after drying. Then put the urea into the melter and melt it into a liquid state at 130-140°C, control the outflow of the molten urea liquid through a flow meter, the concentration is 98%, and spray the outflowing molten urea into a mist at a pressure of 0.15-0.4Mpa It is sprayed on the surface of the humic acid particles rotating in the drum fluidized bed. As the temperature decreases, the molten urea will gradually solidify on the humic acid particles, and the particles will gradually become larger by rotation. After cooling, it is sieved into particles with a diameter of 1mm≤d≤2.5mm and 2.5mm≤d≤5mm, and is packaged to make a product. According to the national standar...
Embodiment 2
[0089] Regenerated humic acid is formed by decomposing lignite and weathered coal through nitric acid oxidation. Nitric acid with a concentration of 10-20%, the ratio of acid to coal is 3:1, the reaction temperature is 80°C, the reaction time is 2-2.5 hours, the amount of washing water is three times that of coal, and the nitrohumic acid is processed with flue gas at 300°C. Airflow drying, time 3-4 seconds to get nitro humic acid, put it into the drum granulator, add 10% clay and 6% zinc fertilizer, sprinkle the surface of the material with water and rotate to granulate to make 0.5-3mm The spherical shape is then dried to obtain humic acid particles. Put it into the drum again, then put the urea into the melter, melt it into a liquid state at 130-145°C, control the outflow of the molten urea mixture through a flow meter, the concentration of the urine is 98%, and the concentration of the urine is 0.15% through the pressure pump. After the pressure of -0.5Mpa is atomized by th...
Embodiment 3
[0091] The monosodium glutamate waste liquid is adjusted to a pH value of about 5.0 with liquid ammonia, concentrated with a three (four) effect evaporator, sprayed and drum granulated to produce 0.5-3mm spherical humic acid particles, and put into the drum. The granules made from MSG waste liquid contain 6-30% of humic acid, 7-22% of nitrogen and 10-50% of organic matter. Then put urea into the melter and melt it into a liquid state at 130-140°C. Control the outflow of the molten urea mixture through a flow meter. The concentration of urine is 98%. After atomization, it is sprayed on the surface of the humic acid particles rotating in the drum fluidized bed. As the temperature decreases, the molten urea will gradually solidify on the humic acid particles, and the particles will gradually become larger through rotation to make humic acid urea particles. Humic acid urea granules are cooled and sieved to obtain granules with diameters of 1mm≤d≤2.5mm and 2.5mm≤d≤5mm, which are p...
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