The invention discloses a circularly-tanning technology for chrome tanning liquor of sheep garment leather. The circularly-tanning technology comprises the following steps: conditioning,
drying, shearing, main-soaking, fleshing,
degreasing,
pickling,
softening, disacidifying,
softening,
pickling, tanning,
wet grinding, retanning, neutralizing, adding
grease, retanning,
dyeing hair, and
dyeing plates. According to the circularly-tanning technology for chrome tanning liquor of sheep garment leather, the formation of
hexavalent chromium can be effectively reduced, and the chrome waste liquor
flocculation is omitted. According to the test on the chrome content after the chrome tanning liquor is utilized, the chrome waste liquor can be recycled repeatedly by supplementing corresponding chrome
powder during next-time recycling, thereby realizing the clean production of tanned
leather industry. According to the circularly-tanning technology, the sealed no-emission utilization of a chrome resource can be guaranteed so as to greatly reduce environmental
pollution, effectively lower waste water emission and save enterprise
waste treatment and production cost. In addition, the quality of the produced leather is consistent with that of the common chrome tanned leather, the shrinkage temperature is above 100DEG C, and a leather body is soft, plump and flexible, is colorful, has pure white hair and has no effect on the dyed hair and the dyed plates.