Preparation method and application of a kind of biochar-based composition
A technology of biochar and composition, applied in the application, fertilizer mixture, chemical instrument and method, etc., can solve the problems of unstable repair effect and short duration, achieve no secondary pollution, low cost, and high efficiency. Yield effect
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Embodiment 1
[0023] Weigh 1000g of sawdust, dry and pulverize it until the particle size is less than 25mm, put it into an atmosphere box furnace, pump it into a vacuum and feed nitrogen as a protective gas, raise the temperature to 220°C at a rate of 6°C / min, stay for 30min, and then After heating up to 550°C / min, keep it warm for 3 hours, pass through a 20-mesh sieve after grinding, soak in 1mol / L hydrochloric acid for 3 hours, wash and dry to obtain wood chip biochar, which is the first intermediate product 1.
[0024] Weigh 100 g of alkali-making waste residue, dry and pulverize it, and pass through a 60-mesh sieve to obtain the second intermediate product 1.
[0025] Mix 250g of the first intermediate product 1 with 50g of the second intermediate product 1, pass through a 100-mesh sieve after drying, and obtain the product 1.
Embodiment 2
[0027] Weigh 1000g of rice husk, dry and pulverize until the particle size is less than 10mm, put it into a vacuum tube furnace, and after vacuuming, feed nitrogen as a protective gas, raise the temperature to 250°C at 8°C / min, stay for 25min, and then heat it up at 3°C / min. Min heat up to 550°C, keep it warm for 2 hours, grind through a 100-mesh sieve, soak in 3mol / L hydrochloric acid for 1 hour, wash and dry to obtain chaff biochar, which is the first intermediate product 2.
[0028] Weigh 100g of lime, dry and pulverize it, and pass through a 60-mesh sieve to obtain the second intermediate product 2.
[0029] Mix 300g of the first intermediate product 2 with 30g of the second intermediate product 2, pass through an 80-mesh sieve after drying, and obtain the product 2.
Embodiment 3
[0031] Weigh 1000g of corn stalks, dry and pulverize them until the particle size is less than 10mm, put them into an atmosphere box furnace, vacuumize and feed nitrogen as a protective gas, raise the temperature to 260°C at 10°C / min, stay for 45min, and then heat up to 260°C at 2°C / min After heating up to 750°C, keep it warm for 1 hour, grind it through a 100-mesh sieve, soak it in 2mol / L hydrochloric acid for 2 hours, wash and dry it to prepare corn straw biochar, which is the first intermediate product 3.
[0032] Weigh 100 g of alkali-making waste residue, dry and pulverize it through a 60-mesh sieve to obtain the second intermediate product 3.
[0033] Mix 200g of the first intermediate product 3 with 60g of the second intermediate product 3, pass through an 80-mesh sieve after drying, and obtain the product 3.
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