At its height, about 100 firefighters from 16 crews across Nottinghamshire and Derbyshire were in attendance at Savanna Rags, off Nottingham Road.
Nearby homes were evacuated and power shut off as crews battled the inferno.
Nottinghamshire Fire & Rescue Service said more than 30 firefighters remained on scene this morning.
And crews from Ashfield Fire Station in Kirkby, who were in attendance, have shared dramatic images from the blaze.
9. Intense
The intensity of the blaze can be clearly seen. Photo: Nottinghamshire Fire & Rescue Service
10. Raging
The fire at Savanna Rags in Mansfield has been burning through the night. Photo: Nottinghamshire Fire & Rescue Service
11. Presence
A number of firefighters remain at the scene. Photo: Nottinghamshire Fire & Rescue Service
12. Firefighting
The firefighting operation continues. Photo: Nottinghamshire Fire & Rescue Service