The invention discloses a low-temperature
superfine grinding and quality maintaining process for glutinous
rice flour. The process comprises the following steps: pretreatment: cleaning a glutinous rice
raw material, atomizing, humidifying and
tempering, and pre-cooling after
wetting; environment construction: an
inert gas circulation environment is constructed in a closed crushing
system, the temperature of circulation gas in the
system is controlled to be within a first low-temperature interval, and the
oxygen concentration is controlled to be below a safety threshold value; graded crushing: feeding the treated raw materials into a crushing
system, utilizing low-temperature circulating gas as a conveying medium, enabling the glutinous rice raw materials to sequentially pass through a plurality of crushing areas with gradually-decreased
grinding gaps in the
airflow direction to be subjected to graded crushing, and taking away heat generated by
grinding by utilizing the low-temperature circulating gas; and separating
fine powder. The system is high in integration level, the ultrafine glutinous
rice flour is uniform and fine in particle size and controllable in broken
starch rate through a low-temperature
inert gas loop and graded crushing design, the gelatinization characteristic and the gel characteristic of the ultrafine glutinous
rice flour are closer to those of raw materials, and the application range is wider.