Permeation fusion method for preparing charcoal-based urea fertilizer
A biochar and urea-based technology, applied in the field of biomass resource utilization, can solve the problems of difficulty in combining chemical fertilizers and low strength of biomass charcoal fertilizers, and achieve the effects of easy adjustment and control, good carbonization effect, and good fluidity
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[0039] Example 1
[0040] Weigh 0.3g of biochar powder with a particle size of 0.075~0.1mm and 0.2g of urea powder (a ratio of 1.5:1) into the fertilizer tube with a diameter of 8mm and a closed bottom, and tap into the fertilizer tube to make biochar Evenly contact the powder and urea, then transfer the fertilizer tube to a vacuum oven, adjust the temperature to 135°C, and increase the temperature to 140°C, 145°C, 150°C and 155°C after preheating for 5 minutes, and react 30, 25, and 20 respectively , Take it out after 15 minutes, cool it for 5 seconds under the action of air at 25℃, and get biochar-based urea fertilizer with different melting reaction temperature.
[0041] The above-mentioned biochar-based urea fertilizer was tested for compressive strength, and the compressive strength was 72.91N, 207.5N, 98.45N and 86.67N, respectively.
Example Embodiment
[0042] Example 2
[0043] Weigh 0.3g of biochar powder with particle size of 0.125~0.18mm, 0.10~0.125mm and 0.075~0.1mm, and 0.2g urea powder (the ratio is 1.5:1) into the fertilizer pipe with a diameter of 8mm. In the closed fertilizer tube, tap the fertilizer tube to make the biochar and urea evenly contact, then transfer the fertilizer tube to the vacuum oven, adjust the temperature to 135℃, and increase the temperature to 155℃ after preheating for 5 minutes. Take it out after 15 minutes, cool it under the action of air at 25°C for 5 seconds, and then obtain biochar-based urea fertilizers with different biochar powder particle sizes.
[0044] The above-mentioned biochar-based urea fertilizer was tested for compressive strength, and the compressive strength was 73.23N, 93.52N and 86.67N, respectively.
Example Embodiment
[0045] Example 3
[0046] Weigh 0.3g of biochar powder with a particle size of 0.075~0.1mm and 0.2g of urea powder (a ratio of 1.5:1) into the fertilizer tube with diameters of 6mm, 8mm, 10mm, and 12mm respectively, and the bottom is closed. Tap the fertilizer tube to make the biochar and urea evenly contact, then transfer the fertilizer tube to a vacuum oven, adjust the temperature to 135℃, preheat for 5 minutes, raise the temperature to 155℃ respectively, and take it out after 15 minutes of reaction. It is cooled for 5 seconds under the action of the air and taken out to obtain biochar-based urea fertilizer with different particle diameters.
[0047] The above-mentioned biochar-based urea fertilizer was tested for compressive strength, and the compressive strength was 55.61N, 86.67N, 97.47N and 89.75N, respectively.
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