Compound fertilizer containing high-efficiency binder and production method thereof

Abstract

The invention discloses a granular compound fertilizer prepared by using modified starch as a binder. The compound fertilizer is characterized by comprising the following raw materials in parts by weight: 15-40 parts of nitrogenous fertilizer, 20-40 parts of phosphatic fertilizer, 20-42 parts of potash fertilizer and 0.5-2.0 parts of binder. The raw materials of the binder consist of 35-45 parts by weight of starch, 1-5 parts by weight of phosphate, 0.1-3 parts by weight of oxidant, 0.1-1 part by weight of coupling agent and 40-60 parts by weight of water. The binder contained in the granular compound fertilizer has good adhesion capability, so the granular compound fertilizer disclosed by the invention has the advantage that adhesive capability is good, the rotary drum granulation pelletizing ratio is high and the material returning rate is reduced; the pertinence is strong and the fertilizer efficiency is completely releases, so that the soil is hard to harden and the yield-increasing effect is prominent; and the virtuous circle of the soil nutrient can be maintained, the water and nutrient retention capability of the soil is improved and the resistance of the crops is enhanced.

Description

technical field [0001] The invention relates to a compound fertilizer containing a high-efficiency binder, in particular to an inorganic compound fertilizer using modified starch as a binder, and provides a preparation method thereof. Background technique [0002] Fertilizers made by chemical methods or mixed methods that have nitrogen, phosphorus, and potassium at the same time or at least two nutrients are called compound fertilizers. Based on the ratio of nutrients required by a certain crop and the laboratory analysis of the abundance and deficiency of nutrients contained in a certain soil, comprehensively balancing the two factors of high yield and quality of crops and soil fertility, the ratio, type and total amount of input nutrients Formulate the best ratio, fertilizer made by scientific methods. Due to the popularity of compound fertilizers, people have also put forward higher safety requirements for compound fertilizer fertilizer products. The binding agent commo...

AI Technical Summary

Problems solved by technology

The binding agent commonly used in the production of compound fertilizers is clay minerals at present, and the problems encountered are: 1. The raw material bonding performance is poor, and it is difficult to form granules during granulation; 2. Due to poor dispersion and uneven distribution, each The nutrient content of the compound fertilizer granules is different; 3. After drying, the clay on the surface of the fertilizer granules becomes powdery and easy to fall off, which not only reduces the production efficiency, but also seriously affects the qualified rate of the product. 4. The granule strength is low. Easy to break, increase the contact surface between particles and easy to agglomerate

5. The utilization rate of nitrogen, phosphorus, potassium and other nutrients is not high. Long-term use of this kind in large quantities will easily cause soil acidification and compaction, and the biological activity will be reduced; 6. The use of clay as a binder will reduce the effective components due to the increase of useless components Content, so that the relative increase in production energy consumption and transportation costs