Non-drying granular fertilizers include urea, ammonium phosphate, compound fertilizer, potash fertilizer granules, etc., fertilizer granulation is one of the development trends of fertilizers. Compared with powdered fertilizers, granular fertilizers have good physical properties, no dust, long-term storage and no agglomeration, good fluidity, easy to spread fertilizer, and can realize aircraft sowing. At the same time, it can also play a slow-release effect and improve fertilizer performance. Utilization rate. There are three common methods for processing this kind of non-drying granular fertilizers: disc granulation, recrystallization and extrusion granulation. After long-term practical experience, we recommend using a pair-roll extrusion granulator to process non-drying granular fertilizers. , This kind of processing using a pair of roll extrusion granulator is more practical.
Dry powder-free processed granular fertilizers are mainly used for processing compound fertilizers and compound fertilizers. As the raw material of compound fertilizer, powdery is suitable, but as fertilizer for direct use, granular fertilizer is better than powdery products. The common processing methods of dry granular fertilizer include disc granulation, recrystallization and extrusion granulation. The three granulation methods have their own characteristics.
Comparison of three methods of non-drying granular fertilizer processing
Disc granulation. Disc granulation requires adding a binder to the powder, and at the same time it is obtained by drying and sieving. This method requires the addition of ineffective ingredients such as binder (usually clay) and water to reduce the nutrient content of the product.
Recrystallization method. The powder is dissolved in water, cooled, crystallized and separated into crystals and then crushed and sieved. The method has a complicated process, high cost, high consumption, and low market competitiveness.
Extrusion granulation method. A tablet press or an extrusion granulator is used to forcibly squeeze the powdered potassium fertilizer into tablets, which are then made into granules through processes such as slicing, granulating, and sieving. There are two types of extrusion granulation: roller type and wheel roller type. The roller type extrusion is firstly pressed into large pieces and then crushed into particles. In this way, the device has large capacity, high particle strength and low energy consumption. The wheel rolling type is to directly squeeze the material into a cylindrical strip in the laminating film, and then cut it into columnar particles. Most of the extrusion granulation methods currently used in China are wheel pulverization, and the production scale is small. A single double roller granulator machine can only reach 3~5t/h, and the granulation strength is limited, the mold is damaged, and the production is cylindrical granules. , Poor flow performance and other characteristics.
The double-roll extrusion granulator has obvious advantages in processing non-drying granular fertilizers
The roller squeezing granulator adopts rolling molding and crushing into granules. Extrusion granulation production has a wide range of raw material routes. At present, there are more than 20 kinds of materials that have been successfully used for extrusion granulation: ammonium nitrate, urea, ammonium chloride, calcium nitrate, potassium chloride, potassium sulfate, etc. In addition, the extrusion granulation process can flexibly realize the replacement of product formulas in a very short time, and a set of equipment can produce products with more than 30 formulas.
The design of the roller extrusion granulator is very reasonable, very practical, and low energy consumption. It can be continuously produced without drying at room temperature and once rolled and formed. The ball and socket on the roller can be manufactured according to the size and shape of the customer’s needs. At present, we There are spherical, pillow-shaped, semi-circular grain, rod, pill shape, walnut shape, oblate shape, and square shape. It is now used as a new energy-saving product in the compound fertilizer and organic fertilizer industry.
Organic fertilizer equipment manufacturers not only provide equipment products, but also provide technical services. The intervention of equipment manufacturers is inseparable from the preparation of the pig manure organic fertilizer processing production line from the early stage to the later stage of production, from ground infrastructure guidance, process design, equipment customization, equipment installation, customer technical personnel training, after-sales technical guidance, etc. , All need the service and support of the equipment manufacturer. A company with a good reputation, good service and good reputation is the consideration for choosing a pig manure organic fertilizer equipment manufacturer.
The roller extrusion granulator belongs to the extrusion slip model. Its working principle is: the belt and pulley are driven by the motor, transmitted to the driving shaft through the reducer, and synchronized with the driven shaft through the split gear, and work in opposite directions. The material is added from the hopper, formed by the pair of rollers, demoulded and pelletized, and then sent to the crushing screen studio through a pair of chains, where the finished product particles (balls) are screened and separated, and then the returned material is mixed with the new material. Then granulate. With the continuous rotation of the motor and the continuous entry of materials, mass production can be realized.
The double-roller extrusion granulator produced by FPC is green and environmentally friendly and has no three wastes emissions during the production process. FPC is one of the companies that have passed the environmental assessment certification. With an annual output of more than 1,000 pairs of roll granulators, they are sold to all regions of the country, and even all over the world. Choosing FPC will give you no worries.
