Procedure for making a small concrete/ Biomass mixer is given in this inscrutables.
Step 1: Creation of Shaft
1. take one small shaft and arrange plates over it as shown in picture.
this is a rotating element in your mixer or you can make it steady and rotate barrel also.
Step 2: Making of Barrel
Take one small barrel or pipe of 2'' in diameter and 6'' long.
Step 3: Cutting of Barrel
now cut this barrel or pipe as shown in picture.
Step 4: Creating Disc or Plate
Take two disc of 2'' diameter for providing closing of barrel.
And Make the Hole of as equal to your shaft diameter.
Step 5: Assembling All the Parts
Now assemble all the parts as shown in picture