Iron ore

Topic: Mineral Resources of India: Distribution and Conservation · NCERT: Class 10, Ch 5 "Minerals and Energy Resources"; Class 12, Ch 5 "Mineral and Energy Resources"

Meaning

Iron ore is rock that holds enough iron to be worth mining. In India it comes mainly as haematite (Fe₂O₃) and magnetite (Fe₃O₄). NCERT calls it "the basic mineral and the backbone of industrial development". It is the raw material for steel. India has the largest iron ore reserves in Asia, and buyers want Indian ore because of its quality.

Explanation

How it forms and what it looks like

• The rocks are very old.
• Indian haematite comes from the Precambrian Iron Ore Series. These rocks are more than 541 million years old.
• The ore lies inside Banded Iron Formation (BIF). BIF means rocks with thin layers of iron oxide and silica stacked one on top of another.

• The ore can be massive, layered, crumbly (friable) or powdery [2].

• Iron content is the share of the ore's weight that is pure iron (Fe). It is a main test of ore quality.

• India's total resources of haematite and magnetite are over 35.284 billion tonnes (IMYB 2022) [2].

Types of iron ore

Feature	Magnetite (Fe₃O₄)	Haematite (Fe₂O₃)
Iron content	Up to 70%. NCERT calls it the finest ore	50-60% (NCERT). Many Indian ores are richer
Special property	Magnetic, so useful in the electrical industry	Reddish iron oxide
Importance	Small share of output	Most-used industrial ore. The main ore in Indian steel plants
Resources (1.4.2020)	11,227 Mt. Only 202 Mt are "Reserves" [2]	24,057 Mt. 6,209 Mt (25.8%) are "Reserves" [2]
Main sector	About 93% in the Southern Sector [2]	About 79% in the Eastern Sector [2]

• Haematite grades: lumps about 45%, lumps with fines 27%, fines 13% and others 15%. "Others" includes blue dust, a fine powdery high-grade haematite [2].
• Which ore is better?
• In theory, magnetite holds more iron (NCERT).
• But the Indian Bureau of Mines (IBM) calls Indian haematite "superior because of its higher grade".
• The reason: only 20% of Indian magnetite resources are metallurgical grade (good enough for making metal). The rest is unclassified or low-grade [2].

Reserves, output and grades

• "Reserves" vs "Remaining Resources" under the UNFC system (United Nations Framework Classification):
• Reserves are proven deposits that can be mined at a profit now.

• Remaining Resources are known deposits that are less certain or not yet profitable to mine [2].

• Production record:

• 2021-22: 253.97 million tonnes [2]
• 2023-24: 277 MMT [3]

• 2024-25: 289 MMT, a new record and 4.3% growth [3]

• By value, iron ore makes up about 70% of all MCDR mineral production [3]. MCDR minerals are the major minerals other than fuel, atomic and minor minerals.

• Form of output (2021-22): fines (small, powder-like pieces) 70.76%, lumps 28.69%, concentrates 0.55% [2].
• Ownership (2021-22): private sector 60.7%, public sector 39.3%. Captive mines gave 37.94% of output [2]. A captive mine is owned by a steel company and feeds its own plants.

Making low-grade ore usable

• Most Indian output is fines, so these steps matter:
• Beneficiation means crushing, screening, washing and grinding the ore. This removes waste rock (gangue) and raises the iron content [2].
• Sintering means heating fines until they fuse into lumps that blast furnaces can use [2].

• Pelletisation means rolling fines or concentrates into small hard balls (pellets). Pellets are used in India and also exported [2].

• Without these steps, fines pile up as waste. Stocks at the mine head were 119.19 Mt at the end of 2021-22 [2].

Where it occurs

• States with reserves: about 95% of reserves are in Odisha, Jharkhand, Chhattisgarh, Karnataka, Goa, Telangana, Andhra Pradesh and Tamil Nadu.
• Haematite resources: Odisha 39% (9,409 Mt), Jharkhand 20%, Chhattisgarh 19%, Karnataka 12%, Goa 5% [2].
• Magnetite resources: Karnataka 69.5% (7,802 Mt), Andhra Pradesh 13.1%, Rajasthan 7.1%, Tamil Nadu 4.7%, Goa 2.3% [2].
• Producing states (2021-22) [2]:
• Odisha 136.67 Mt (53.82%)
• Chhattisgarh 41.31 Mt (16.27%)
• Karnataka 40.33 Mt (15.88%)

• Jharkhand 24.72 Mt (9.74%)

• Top districts (2021-22): Ballari gave 32.1 Mt of Karnataka's output. Dantewada (Bailadila) gave 28.6 Mt of Chhattisgarh's output [2].

• The four belts: 1. Odisha-Jharkhand belt

  • Odisha: Gurumahisani, Sulaipet and Badampahar (Mayurbhanj), Kiriburu (Kendujhar), Bonai (Sundergarh).
  • Jharkhand: Noamundi and Gua (Singhbhum). These are among India's oldest mines. 2. Durg-Bastar-Chandrapur belt (Chhattisgarh and Maharashtra)
  • Dalli-Rajhara (Durg) feeds the Bhilai steel plant.
  • The Bailadila range in Bastar has 14 deposits of super high-grade haematite. NMDC mines them [2].
  • Bailadila ore goes by rail (Kirandul-Kottavalasa line) across the Eastern Ghats to Visakhapatnam port, and then to Japan and South Korea. 3. Ballari-Chitradurga-Chikkamagaluru-Tumakuru belt (Karnataka)
  • Sandur-Hospet (Ballari), Baba Budan hills, Kudremukh, and NMDC's Donimalai mine [2]. 4. Maharashtra-Goa belt
  • Goa and Ratnagiri (Maharashtra).
  • The ore is lower grade but is mined efficiently and exported through Marmagao port.

• Other deposits:

• Maharashtra: Chandrapur, Bhandara
• Telangana: Karimnagar, Warangal
• Andhra Pradesh: Kurnool, Kadapa, Anantapur

• Tamil Nadu: Salem, the Nilgiris

• World (2024, estimated): Australia (930 Mt) and Brazil (440 Mt) lead. India and China produced about 270 Mt each, so India is joint third with about 11% of world output [5].

Don't confuse with

• Magnetite vs haematite: magnetite (Fe₃O₄) is magnetic and holds up to 70% iron, and is found mostly in Karnataka. Haematite (Fe₂O₃) is reddish and is the most-used ore. Most of it is in Odisha.
• Reserves vs resources: India has 35.284 billion tonnes of total resources. Only a small part counts as UNFC "Reserves", which means proven and profitable to mine now (for magnetite, only 202 Mt out of 11,227 Mt) [2].
• Largest resources vs largest producer: Karnataka has the most magnetite resources. Odisha has the most haematite resources and is also the top producer (53.82% in 2021-22) [2].
• Kudremukh vs Bailadila: Kudremukh (Karnataka) was a magnetite mine run by KIOCL. The Supreme Court ordered it closed in 2002, and mining ended in 2005. Bailadila (Chhattisgarh) is an active haematite mine run by NMDC.

Prelims Hooks

• Mine and state pairs:
• Noamundi, Gua → Singhbhum, Jharkhand
• Kiriburu → Kendujhar, Odisha
• Dalli-Rajhara → Durg, Chhattisgarh
• Bailadila → Dantewada, Chhattisgarh

• Kudremukh → Chikkamagaluru, Karnataka

• Ore and port pairs: Bailadila → Visakhapatnam. Goa → Marmagao. Kudremukh → near Mangaluru, by slurry pipeline (ore mixed with water and pumped).

• Name meanings: Bailadila means "ox's hump". Kudremukh means "horse face".
• Trap: Rajasthan has 7.1% of magnetite resources, but it is missing from NCERT's list [2].
• Export duty: 30% on lumps and fines with 58% Fe or more, 0% below 58% Fe, and nil on pellets [2].
• Record: 289 MMT in 2024-25 [3]. India was joint third in the world in 2024 [5].

Mains Points

• Why steel plants sit near the mines (GS-I)
• About 79% of haematite lies in the old Precambrian BIF rocks of the eastern plateau [2].

• So steel plants grew up near the mines in the Chota Nagpur-Odisha-Chhattisgarh region. Examples: Bhilai near Dalli-Rajhara, Jamshedpur near Noamundi.

• Mining vs forests and people (GS-III)

• Kudremukh: the Supreme Court stopped mining (2002-05) to protect Kudremukh National Park and the headwaters of the Tunga and Bhadra rivers.
• Bailadila and Surjagad: mining clashes with tribal land under the Fifth Schedule, with Left-wing extremism, and with sacred hills. Example: Adivasi protests at Nandraj hill in 2019.

• Answer angle: Fifth Schedule, PESA, Forest Rights Act and benefit-sharing with local people.

• Governance and reform (GS-III)

• The problem: the Karnataka Lokayukta report (2011) exposed illegal mining in Ballari. In Goa Foundation (2018), the Supreme Court quashed Goa's lease renewals, and Goa produced nothing in 2021-22 [2].
• The reform: the MMDR Amendment Act 2015 made auctions the rule for granting mining leases. In 2025, 32 of 141 blocks auctioned were iron ore, and the Centre no longer needs to give prior approval for composite licence auctions [4].
• Using ore wisely: the export duty keeps high-grade ore in India for domestic steel makers [2]. Beneficiation and pelletisation turn waste fines into usable ore and cut waste.

Related concepts

• Haematite
• Magnetite
• Iron ore belts of India
• Bailadila range
• Kudremukh

Read more

• Iron ore: types, belts and contested mines