Concentrate Feed is composed of premix and protein material, such as seed cake, fish powder, blood powder etc.

Powder Feed and Pellet Feed is a group of relative concept. from the point of view of raw material, they are made from same raw material; In the view of processing technoloty,  the powder feed production line is part of the pellet feed line, it's just a pellet feed production line but without the pelletizing section (please refer to the following processing sketch map.)

From the perspective of the composition of equipment and the processing technoloty, the concentrate feed and the powder feed are same.  in other words,  the same powder feed production line could be definitely used for producing concentrate feed.