Table of Contents
There are many methods of producing blended fertilizers, and the choice of blending equipment and production process depends on many factors. First of all, it depends on the current technological level of compound fertilizers, which depends on the progress of science and technology and the production level of basic fertilizers; in addition, there are also the structure and production layout of local and nearby basic fertilizers, the transportation, storage and cost of fertilizers, agricultural Production structure, fertilizer market status, prices of fertilizer applicators and blending equipment, etc. At the same time, there are a variety of blended fertilizer production technologies in different regions. With the improvement of the production level of basic fertilizers, the production mode of compound fertilizers has also changed. The methods used in the production of blended fertilizers can be divided into the following categories:
Dry blended fertilizer production process
Mixing of powdered fertilizers: Mixing of powdered fertilizers is a processing method of mixing various basic fertilizers after crushing.
In the early development of compound fertilizers, blending was done in batches with a rake, hoe, or shovel. In some countries, manual methods are still used, especially in small batches. As early as the 20th century, the United States has vigorously developed powdered compound fertilizers. Early powder compound fertilizers used various natural and artificial organic fertilizers, such as plant ash, fish meal, cottonseed meal, bone meal, etc.
After the 1950s, superphosphate, heavy calcium, ammonium sulfate, ammonium nitrate, potassium chloride, potassium sulfate, monoammonium phosphate, and diammonium phosphate have become the main components of powdered blended fertilizers, in order to improve the physical properties of soil. , acidity and alkalinity, dolomite, phosphate rock powder, peanut shell, and diatomite are added as regulators, and the plant size is generally (1≤5)×l04t/a.
During the blending process, the basic raw materials such as ammonium sulfate, ammonium chloride, calcium, and potassium salts are pulverized and mixed according to the formula. Usually in a mixer with fertilizer. The mix is stored for several weeks to mature, allowing the chemical reaction to near completion, and then crumbled and packaged.
In some countries, superphosphate is slightly aminated to improve the physical properties of superphosphate and to provide some nitrogen. Some factories in China use ammonium bicarbonate or calcium magnesium phosphate fertilizers to provide nitrogen or phosphorus nutrients and improve caking.
Mixing fertilizer equipment
The production line of blending fertilizer equipment is composed of a complete set of processes such as computer-controlled static batching system → lifting silo → mixing and mixing → packaging scale weighing → automatic packaging and sewing → belt conveying and stacking.
The equipment of the blending fertilizer production line integrates batching, mixing and packaging, and is especially suitable for the batching and mixing of BB fertilizer, so it is also called BB fertilizer production line. There is no mixed diversion phenomenon, especially when the ratio of different raw materials is very different, and when the amount of fertilizer is small, the accuracy and uniformity of the mixture can also be guaranteed.
Direct ground feeding, no need for raw materials to upgrade equipment, small production line footprint; due to low height, no special requirements for factories, small capital investment in plant and equipment, especially suitable for small fertilizer factories and fertilizer distribution enterprises, both can create maximum The profit value, but also create economic and practical value for you.