The invention relates to a pretreatment technology for reducing
carbonization of tobacco stems after being expanded by
microwave, and belongs to the technical field of tobacco
processing. The pretreatment technology for reducing
carbonization of tobacco stems after being expanded by
microwave is the improvement on basis of prior art. The pretreatment technology for reducing
carbonization of tobacco stems after being expanded by
microwave provided by the invention comprises the following steps: preparing tobacco stems, primary feeding, screening, slitting, air-conveying, secondary feeding, warming and
wetting, and expanding by microwave. The pretreatment technology for reducing carbonization of tobacco stems after being expanded by microwave has the advantages that, the production flow is controlled by quantitatively feeding, and obvious effect is provided for keeping stable quality of each process; when the tobacco stems are in the warming and
wetting process, the tobacco stem slitting technology is used for enabling
moisture and temperature of the core parts, cambiums and cortexes of the tobacco stems to be more uniform, and the carbonization of the core part in the microwave expansion process due to that the core part has more
moisture and lower heat radiating effect than the surface is reduced. The method provided by the invention is significant in improving
cut stem quality and use ratio, and reducing the cost of cigarette enterprises.