NLC India and CSIR to Extract Critical Minerals from Mine Waste

Why in News

NLC India Limited (NLCIL), a Navratna public-sector undertaking, has signed a Memorandum of Understanding with the CSIR-Central Electrochemical Research Institute (CSIR-CECRI), Karaikudi, to develop technology for extracting rare earth elements (REEs) and critical minerals from mining waste, the overburden and tailings at its Neyveli lignite mines. The tie-up, signed at Neyveli in June 2026, supports India’s drive for self-reliance in critical minerals under the National Critical Mineral Mission.

What the Tie-Up Does

The project is a form of “mine-waste (secondary-resource) recovery,” extracting valuable minerals from material previously discarded, and turning a waste liability into a strategic resource. (This differs from “urban mining,” which means recovering metals from electronic waste and end-of-life products.) CSIR-CECRI brings the electrochemistry, since recovering trace REEs from lignite overburden and ash relies on electrochemical and hydrometallurgical processing.

What Are Critical Minerals and Rare Earths?

These minerals are the backbone of the clean-energy transition (EV batteries, solar panels, wind turbines) and of modern electronics and defence. A useful distinction is between light REEs (such as neodymium and praseodymium) and the scarcer heavy REEs (such as dysprosium and terbium), both used in the Nd-Fe-B permanent magnets that drive EV motors, wind turbines and defence guidance systems. Despite the name, rare earths are not geologically rare; the difficulty lies in finding concentrated deposits and, above all, in separating and processing them.

The China Chokepoint

The strategic problem is concentration. China controls roughly 60 per cent of rare-earth mining and 85 to 90 per cent of global processing and refining, and the bulk of magnet manufacturing, so the chokepoint is processing, not ore.

• In April 2025, China placed several heavy rare earths and magnets under export licensing, a reminder that critical-mineral supply chains can be weaponised as geopolitical leverage.
• This is why India is racing to build domestic exploration, processing and recovery capacity, and to “friend-shore” supply through partnerships, rather than depend on a single dominant supplier.

Why It Matters

• Strategic autonomy: Domestic extraction and processing reduce reliance on a few foreign suppliers, especially China, for minerals vital to energy and defence.
• The circular economy: Recovering minerals from mine waste embodies a circular-economy approach, extracting value while reducing the environmental burden of tailings.
• Backing the mission: It operationalises the National Critical Mineral Mission, which aims to secure India’s critical-mineral supply chains through exploration, recovery, recycling and overseas acquisition.

India also has institutions such as Khanij Bidesh India Limited (KABIL) for overseas mineral assets and has joined the Mineral Security Partnership, a multi-country effort to build resilient supply chains.

The Policy and Legal Architecture

India’s critical-minerals push rests on a recent, layered framework:

UPSC Relevance

Prelims

• NLC India (NLCIL) is a Navratna PSU (lignite mining and power); it tied up with CSIR-CECRI, Karaikudi
• The goal is to extract rare earths and critical minerals from mine waste (mine-waste recovery, not “urban mining,” which is e-waste)
• Rare earth elements are a group of 17 elements; China controls ~60% of mining and 85-90% of processing (the chokepoint is processing)
• The National Critical Mineral Mission (approved Jan 2025, ~Rs 16,300 crore) and the MMDR Amendment Act, 2023 (opened lithium etc. to private mining)
• India has 30 critical minerals (2023 list); KABIL acquires overseas assets; India is in the Mineral Security Partnership

Mains Angles

1. GS3 Resources / Economy: “Critical minerals are the oil of the 21st century.” Examine India’s strategy for securing critical-mineral supply chains.
2. GS3 Strategic Autonomy: “China’s control of rare-earth processing is a strategic chokepoint.” Analyse India’s dependence and the steps, including friend-shoring, to reduce it.
3. GS3 Science and Technology: Discuss mine-waste recovery and recycling as a circular-economy route to mineral self-reliance.

Facts Corner

Sources: CSIR-CECRI, Ministry of Mines, The Tribune

Source: NLC India and CSIR to Extract Critical Minerals from Mine Waste — Ujiyari.com | Free UPSC & State PCS Current Affairs