Method for preparing carbon-based mineralized active fertilizer

Abstract

The invention discloses a method for preparing a carbon-based mineralized active fertilizer. The method includes the steps that forestry and agricultural residues and woody brown coal biomass serve as basic materials, the basic materials and a catalyst formed by mixing and blending powdered rock phosphate, pumice stones, serpentine, medical stone and bentonite are crushed respectively, mixed according to a certain proportion for pelleting and then placed into a carbonation reaction kettle for a reaction, output materials are cooled and then crushed again, wood vinegar, a biological agent and humic acid are added, stirred and mixed, and the carbon-based mineralized active fertilizer is obtained through pelleting. The carbon-based mineralized active fertilizer prepared through a simple and effective method is environmentally friendly, microcellular structures are increased by 20% and above compared with traditional charcoal, the fertilizer contains richer nitrogen, phosphorus, potassium and medium trace elements compared with the charcoal obtained just through biomass, the total quantity of nitrogen, phosphorus and potassium available to plants is increased by 15-30%, the total content of N-P-K is larger than or equal to 10% and above, the content of organic matter is larger than or equal to 36%, the fertilizer contains rich organic acid, the fertilizer consumption can be lowered, and fertilizer efficiency can be improved.

Description

technical field [0001] The invention belongs to the field of resource utilization of biomass and minerals, and in particular relates to a method for preparing carbon-based mineralized active fertilizers based on biomass and minerals by utilizing catalysis and activation reactions. Background technique [0002] Biochar is an insoluble solid substance produced by pyrolysis and carbonization of biomass under complete or partial anoxic conditions. Biochar has strong adsorption capacity, porosity, high specific surface area, physical thermal stability and biochemical resistance to decomposition. The strong adsorption of biochar can effectively fix the heavy metal ions in the soil and reduce the effective content of heavy metals. At present, the problem of soil pollution and degradation is becoming more and more serious. The rational development and utilization of biomass resources and the research and development of new fertilizers have become an urgent research topic. Biochar ...

AI Technical Summary

Problems solved by technology

[0003] At present, scientific fertilization in Chinese agriculture is not very common. Nitrogen fertilizers are easy to lose, phosphate fertilizers and potassium fertilizers are easy to solidify, which increases the cost of fertilization and reduces the benefits of fertilization. The resulting loss of chemical fertilizers, deterioration of soil physical and chemical properties, soil compaction, soil acidification, poor air permeability, and water retention Decreased fertilizer retention capacity, excessive heavy metals, water pollution, etc. are very serious, and the fertilizer utilization rate has been below 30%.

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