The victim, Gujan, had gone to collect cow dung for Govardhan puja when she accidentally slipped and fell into the mixing plant, he said.
The plant has been sealed by City Magistrate Mahindra Singh and a complaint has been given against its manager, the official said.
Her half burnt body was found lying near the plant and it has been sent for post-mortem, he said.
Meanwhile, agitated residents blocked the traffic on the road leading to the village in protest against the death of the minor.
Disclaimer: No Business Standard Journalist was involved in creation of this content