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CHROMITE • METALLIC MINERAL

Chromite Ore & Chromium Mineral Context in Pakistan

Chromite evaluation in Pakistan requires lot-specific assay of Cr2O3 content, chromium-to-iron (Cr:Fe) ratio, silica gangue, and physical lump sizing. Regional chromite production or occurrence does not establish the grade or suitability of a specific commercial lot.

Product Form
Metallurgical Lump / Gravity Fines
Main Assay
Lot Testing: Cr2O3 & Cr:Fe Ratio
Regional Context
Muslim Bagh & Malakand Belts
Evidence Category
Official Production Evidence (P)
Representative chromite mineral specimen associated with Pakistan ophiolite belt
Representative geological specimen: Massive podiform chromite with serpentinized matrix from Muslim Bagh ophiolitic mantle rocks.
Representative material specimen. Occurrence does not constitute available inventory. Consignment verification required.

Mandatory Claim Boundary & Sourcing Notice: This page describes mineral/material evidence and buyer requirements. It does not represent current Enigma Earth inventory. Source, ownership, grade, quantity and availability must be verified for the specific enquiry.

GEOLOGICAL APPRAISAL

Mineralogy & Geological Occurrence

Pakistan is an established international supplier of podiform chromite ore, derived from alpine-type ophiolite complexes marking ancient Neotethyan oceanic suture zones. Ore quality spans metallurgical, refractory, and chemical categories depending on chromium-iron ratios and accessory spinel compositions.

Geological Setting & Host Formations

Chromite mineralization occurs as podiform lenses, irregular pods, and disseminated stringers within serpentinized dunite and harzburgite sequences of the mantle section of ophiolites. The principal belts include the Muslim Bagh and Zhob ophiolites, the Bela-Khuzdar ophiolite belt, the Dargai-Malakand ophiolite, and scattered occurrences across Waziristan and Kohistan.

Key Mineralogy & Chemical Formula

Chromite (FeCr2O4) forms solid solution series with magnesiochromite (MgCr2O4), hercynite, and spinel. Gangue minerals predominantly comprise serpentine, talc, chlorite, and olivine.

Formula: Chromite (FeCr2O4 / (Mg,Fe)(Cr,Al,Fe)2O4)
PAKISTAN EVIDENCE

Pakistan Evidence & Regional Context

Chromite is actively extracted across Balochistan and Khyber Pakhtunkhwa under provincial mining concessions, serving domestic metallurgical units and international export markets.

[P]Official Production Evidence
BalochistanRegional Context

Muslim Bagh, Khanozai, Zhob & Bela Ophiolite Belts

The Muslim Bagh ophiolite has sustained extraction since 1903, yielding high-grade metallurgical chromite pods; Bela and Khuzdar host refractory and chemical grade podiform bodies.

Documented Regional Occurrence
Khyber PakhtunkhwaRegional Context

Dargai (Malakand) & Kohistan Suture Belts

Hosts layered and podiform chromite occurrences in ultramafic intrusive complexes; commercial production and local gravity beneficiation active.

Documented Regional Occurrence
Evidence Boundary: Podiform chromite deposits are characteristically discontinuous and structurally complex. Documented past extraction at a locality does not guarantee current underground ore reserves or uniform lump quality.
PRODUCT ARCHITECTURE

Commercial Forms & Processing Stages

Commercial requirements must strictly differentiate between raw extraction, sorted grades, and processed products.

01

Metallurgical High-Grade Lumpy Ore

Dense, hard lumpy chromite ore suitable for submerged electric arc furnace smelting into high-carbon ferrochrome (FeCr). Requires strong physical lump integrity.

Hard lump: 10 mm to 100 mm (Cr2O3 44% - 52%, Cr:Fe >= 2.6:1 - 3.0:1 on lot verification)
02

Refractory Grade Chromite

Chromite with high Al2O3 and low iron content used in basic refractory brick manufacturing and furnace lining. Valued for high thermal resistance and neutral chemical slag behavior.

Crushed lump or granular (Cr2O3 32% - 40%, Al2O3 + Cr2O3 > 58%)
03

Chemical Grade Chromite Fines

Fine chromite ore used in sodium dichromate synthesis, chrome plating, tanning salts, and pigment production. Low silica is critical.

Screened fines: 0 mm to 10 mm (Cr2O3 40% - 46%, SiO2 < 3.5%)
04

Gravity Beneficiated Concentrates

Concentrate powder produced via spiral concentrators and shaking tables from low-grade friable ores. Primarily utilized for chemical or metallurgical briquetting.

Washed sand concentrate: 80% passing 1 mm (Cr2O3 46% - 50%)
TECHNICAL QUALIFICATION

Buyer Specification Requirements

Prospective buyers and project owners should specify the parameters below. Values represent typical industrial targets and do not imply universal Pakistani deposit compliance.

Chemical Composition & Ratios

6 Parameters
Chromium Oxide (Cr2O3)
High Grade: 46.0% - 50.0%; Medium: 40.0% - 45.9%; Low: 30.0% - 39.9%
Dry basis, XRF / ICP-OES validation
Chromium to Iron Ratio (Cr:Fe)
Typically 2.4:1 to 3.0:1 in tested high-grade lots
Lot-specific verification required; not guaranteed universally
Silica (SiO2)
Target <= 4.0% - 6.0%; penalty applied above 8.0%
Crucial slag volume control parameter
Total Iron (Fe / FeO)
Typically 12.0% - 18.0% total iron
Inverse relationship to Cr:Fe ratio
Alumina (Al2O3)
Typically 8.0% - 15.0%
Spinel component
Magnesia (MgO)
Typically 12.0% - 18.0%
Refractory index component

Physical & Sizing Parameters

3 Parameters
Lump Sizing Distribution
10 mm - 100 mm (minimum 85% within specified range)
Maximum 10% - 15% fines (< 10 mm) at load port
Physical Competence
Hard, lumpy, non-friable rock
Prevents degradation during maritime ocean transit
Moisture Content
Maximum 1.0% - 3.0% free moisture
Air-dry cargo

Commercial Consignment Parameters

3 Parameters
Consignment Sizing
Trial consignments from 100 MT; commercial bulk parcels 500 - 5,000 MT
Breakbulk or containerized
Packaging Form
Bulk in 20ft marine containers or 1.5 MT heavy-duty jumbo bags
Containerized export standard
Inspection Authority
Independent accredited surveyor (ALS, SGS, Alfred H Knight)
Sampling and weighing at Karachi consolidation depot
VERIFICATION PROTOCOL

Testing & Verification Requirements

Testing and quality verification must be conducted by an appropriate independent laboratory. Commercial transactions require representative sampling, assay, chemical analysis or gemological appraisal, and third-party inspection. Enigma Earth does not maintain a private testing monopoly.

Representative Sampling

Incremental mechanical or manual sampling from stockpiles according to ISO 6153 / ISO 8530 guidelines for chromite ores. Sample crushing, riffle splitting, and pulverized analytical sample preparation.

Standard Test Methods
  • ISO 6153 (Chromium ores — Incremental sampling)
  • ISO 8530 (Chromium ores and concentrates — Determination of chromium content — Titrimetric method)
  • ISO 9516-1 (Determination of Cr, Fe, Si, Al, Mg by X-ray fluorescence spectrometry)
Laboratory Independence

All commercial grade designations must be supported by official assay certificates issued by accredited independent laboratories (ALS, SGS, Alfred H Knight). Enigma Earth does not issue self-certified grades.

QUALITY CRITERIA

Impurity Tolerances & Critical Penalty Factors

Commercial specifications require explicit thresholds for penalty elements, structural soundness, color uniformity, and treatment parameters.

Low Cr:Fe Ratio (< 2.2:1)

Quality Parameter

Operational Impact: Reduces ferrochrome metal recovery and prevents high-carbon FeCr specification compliance

Tolerance: Metallurgical penalty below 2.5:1; severe penalty below 2.2:1

Excess Silica (SiO2 > 8.0%)

Quality Parameter

Operational Impact: High power consumption in submerged arc furnaces and excessive slag volume

Tolerance: Rejection typically > 10.0% for metallurgical lumpy grade

Phosphorus (P) & Sulfur (S)

Quality Parameter

Operational Impact: Contaminates molten ferrochrome alloy, requiring costly downstream refining

Tolerance: P < 0.007% - 0.010%; S < 0.025% - 0.040%

Friability & Excessive Fines (< 10 mm)

Quality Parameter

Operational Impact: Chokes gas permeability inside reduction furnaces, creating operational blow-out hazards

Tolerance: Fines penalty typically enforced above 15% passing 10 mm
SUPPLY CHAIN INTEGRITY

Sourcing, Provenance & Preparation Logistics

Due diligence guidelines for legal chain of custody, packaging standards, and maritime export protocols.

Origin Verification & Licensing

Chromite consignments require verifiable provincial dispatch documentation (Mines & Minerals Directorate), mining lease authorization, and transport passes.

Extraction in Muslim Bagh, Khanozai, and Malakand operates under private and tribal lease frameworks. Legal title and royalty clearance must be verified prior to consignment export.

Provenance Caution: Market sellers frequently display hand-selected high-grade lump assays (e.g. 50%+ Cr2O3) while delivery stockpiles contain mixed lower-grade or highly friable ore. Rigorous stockpile composite sampling is mandatory.
Packaging & Maritime Transport
  • Bulk containerized loading directly into 20ft marine containers with end-door bulkheads
  • 1.5 MT to 2.0 MT heavy-duty woven polypropylene bulk bags for easy port handling

Road haulage via National Highway N-50 / N-25 to Karachi consolidation yards, followed by containerized or breakbulk vessel shipment via Karachi Port or Port Qasim.

Handling Caution: Chromite is exceptionally dense (specific gravity 4.2 - 4.8); container payloads must be strictly balanced and weight-monitored to avoid exceeding road axle limits and SOLAS container weight regulations.
INQUIRY SUBMISSION GUIDE

What to Send: Technical Requirement Checklist

To evaluate feasibility and structure compliant off-take, please include the following technical details in your enquiry.

1Intended end-use application (Metallurgical FeCr vs Refractory vs Chemical)
2Target Cr2O3 percentage range and absolute minimum cutoff grade
3Acceptable Cr:Fe ratio range and penalty threshold
4Maximum acceptable silica (SiO2) limit
5Physical sizing specification (Lump size distribution vs Concentrates)
6Consignment volume (trial parcel vs monthly contracted volume)
7Preferred delivery terms (Ex-consolidation yard vs FOB Karachi / Port Qasim vs CIF)
8Nominated independent inspection agency (ALS, SGS, Alfred H Knight)
Incomplete RFQs lacking grade cutoffs or consignment volumes cannot be processed.
Submit a Chromite Specification
FREQUENTLY ASKED QUESTIONS

Frequently Asked Questions: Chromite Ore & Concentrates

Key questions regarding Pakistani mineral availability, testing protocols, and trade qualification.

International metallurgical buyers typically seek Cr2O3 grades between 42.0% and 48.0% with a Cr:Fe ratio of at least 2.5:1 to 2.8:1. Lower grades (38% - 42%) are also traded with appropriate price adjustments based on silica and iron penalties.

Structured Mineral Qualification

Structure a Compliant Chromite Ore & Concentrates Requirement

Submit technical specifications, target Cr2O3 grades, and delivery terms for comprehensive evaluation.