Applications

Chemicals

Fertilizers

Fig. Wheat field

Fig. Wheat field

Summary

Due to worldwide increase of population in areas such as South East Asia, India and Africa, the demand of chemical fertilizer required in the cultivation of agricultural products is also increasing. To increase the productivity per crop acreage, chemical fertilizer with suitable ingredients blended per each type of crop or BB (Bulk Blending) Fertilizer, for which ingredients can be adjusted by blending of raw materials, are widely used and increasing in worldwide demand as well. In general, granular product is preferred in the market because it can avoid dust generation during distribution and give the advantage in durability.

Contents

In the BB Fertilizer, granular raw materials; nitrogen, phosphate salt and potassium are blended on purpose. To avoid segregation during mixing each granular sizes should be adjusted and 2-4mm sizes are suitable which are easy to handle and dusting is minimized. Premixed chemical fertilizer, which includes required ingredients are also adjusted to 2-4mm sizes. These granular fertilizers are easy to distribute with minimum dusting and do not stick to each other during storage, therefore demand is rising. Conventionally, rotating drums, i.e. tumbling granulation process, produces granular fertilizers. Because the granulation process requires liquid binder, drying is mandatory. Thus, high production cost is unavoidable in the wet granulation. As we have developed dry granulating process without liquid binder, granular products with lower production cost and superior product quality are now available.

In the dry granulating process, dry compaction process replaced the conventional tumbling granulation. It forms plate - like molds from powder material by strong compression force. The plate is ground by hammer mill to granular form and sieved to target size range. By roller drum (Fig.2), granular edges are rounded as well as treated with anti-blocking agent. Compared with the conventional product granular durability is improved and distribution property is increased because of round shape granular and less dusting.

Fig.1 Compactor image

Fig.2 Drum for surface coating

Fig.3 Compactor

Fig.4 Product example

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