Yes, you can file RTI to National Aluminium Company (NALCO).
National Aluminium Company Limited (NALCO) was incorporated in the Year 1981 as a Public Sector Enterprise under Ministry of Mines, Government of India. Currently Government of India holds 52% equity of NALCO. Thus, NALCO is a Public Authority as per Section 2 (h) of the RTI Act 2005 and comes under the ambit of the Act.
Hence, you can apply RTI to NALCO by paying the prescribed fee either Online or by Offline mode.
To know the further procedure for filing RTI Online please refer https://onlinerti.com/how-to-file-rti-online-for-center