Raw milk usually consists of adipose, protein and microelements. Generally its solid content is 10.5% to 12%. Spray dryer can be used to produce whole milk powder. And the generally process is as follows: raw milk – acceptance – filter – purification – cooling – milk storage – sterilization – concentration – spraying – cooling – sieve – packing.
4.	During the cooling process, silica dispersant should be added because the whole powder is tended to absorb moisture and block together.
5.	For spray dryer machine, customers are free to choose either centrifugal spray or pressure spray. The former produces powder products and the latter granule products.