The invention discloses a
processing method of high-grade tobacco expansion shreds. The method comprises the following steps of A, dampening
cut tobacco shreds through a CO2 expansion line until the
moisture content is 20 to 25 percent; B, dipping the
cut tobacco shreds in a CO2 dipping tank, wherein the dipping time is 10 to 80 seconds, the CO2 draining time is 120 to 350 seconds, and the CO2 content in the dipped tobacco shreds is 2 to 6 percent; C,
drying and expanding the tobacco shreds in a
fluidized bed, wherein the process flow rate of the
fluidized bed is 2,500kg / h, the temperature of the first area is 100 to 1,400 DEG C, the temperature of the second area and the third area is normal temperature, the steam flow is 600 to 900kg / h, and the
moisture content of the dried and expanded tobacco shreds is 12.5 to 13.0 percent; and D, adding a characteristic
aroma into the shreds by using an
aroma adding machine. The expansion shreds manufactured by the process are relatively good in color and luster, lemon yellow and high in expansion shred finishing rate, the fill value is slightly lower than that of the expansion shreds manufactured in the prior art, the
internal quality is obviously improved, and volatile and semi-volatile aromatic component loss is low.