Fertilizer Coating Process

Coated fertilizer is a kind of NPK compound fertilizer widely used in agricultural production. It is popular with farmers for its low cost and high fertilizer efficiency. When NPK chemical fertilizer production line produces compound fertilizer, the treatment of coating machine is increased, which greatly improves the influence of fertilizer on crops.

The controlled release time of coating controlled release fertilizer is long, and the fertilization effect can be as long as 2 months to 1 year. NPK coated fertilizer can promote root growth, make crops mature early, solve the problem of crop fertilizer shortage caused by severe drought, and create favorable conditions for high yield of various crops.

NPK coated fertilizers can be used in the production of many crops. The output of rice, wheat, peanuts, corn, cotton, tobacco, vegetables, fruit trees, flowers, lawns and other crops increased significantly.

How to process NPK fertilizer production line

In the process of coating fertilizer, NPK fertilizer production line uses various nutrients, such as blood acid as coating layer, and the fertilizer is coated by coating machine. The coating can greatly reduce the loss of fertilizer and soil fixation, and greatly improve the utilization rate of fertilizer. The proportion of NPK and its trace elements in coated fertilizer processed by NPK fertilizer production line is determined according to crop demand and different soil conditions.

When we use NPK fertilizer production line to process coated fertilizer, we can produce special or general coated compound fertilizer for crops. This special NPK compound fertilizer has high fertilizer efficiency.

The application amount should be reduced according to the specific situation of crops and soil. The time interval of fertilization should be determined according to the length of controlled release cycle.

Therefore, when farmers use coated compound fertilizer, the production cost will be reduced.
Coating fertilizer for NPK fertilizer production line

How to get urea fertilizer coated?

Coated urea is a modified urea. So, why should urea be applied in the process of compound fertilizer production lines? There are two reasons:

1. Urea is a nitrogen fertilizer variety with the highest nitrogen content (n = 46%). In recent years, the actual effect of fertilization shows that urea is a kind of fertilizer with low utilization rate. Due to the large amount and low utilization rate of urea, the nitrogen loss caused by urea and the negative impact on the atmosphere and water environment are also large.

Drum coating machine

2. The reason for the low utilization rate of urea in agriculture is determined by the weak agricultural chemical properties of urea. The agrochemical properties of urea in soil are similar to that of ammonium bicarbonate. Soil cannot be absorbed and stored until it is absorbed and stored. At the same time of ammoniation, soil alkalization in micro area was also accompanied, which led to the increase of ammonia volatilization. The nitrogen content of urea is higher than that of ammonium bicarbonate, so the total volatile content of urea is higher than that of ammonium bicarbonate.

Material composition and processing technology of urea coating solution
The coating solution is a jelly composed of organic and inorganic substances. In addition to organic substances such as formic acid, a little salt forms of potassium (k), magnesium (mg), manganese (MN) and zinc (Zn) are added. Iron (FE), iron (b) and other nutrients. The coating solution is yellowish green with specific gravity of 1.17 ~ 1.18 and pH of 3 ~ 4.

Coating urea processing technology

Urea coating process is to use the coating solution and urea particle surface has a certain affinity, a small amount of solution evenly sprayed on the urea surface, and a small amount of penetration into the urea particles, the amount of coating solution per kg of urea is only 6-10 kg. With the help of hot drying and curing of urea, the coating solution can form a very thin film on the surface of urea particles after dry solid oxidation, which can be processed at one time.

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