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Published advance ruling · Classification

NCS/ARS/CL/10332

Advance ruling number
NCS/ARS/CL/10332
System reference
10332
Date of issue
2026-04-17
Category
Classification
Name of applicant
Withheld — applicant details are not published
Product
6000 TPD CEMENT PRODUCTION PLANT
Product specification / details

ADVANCE RULING ON THE TARIFF CLASSIFICATION OF A 6000 TPD CEMENT PRODUCTION PLANT

1. INTRODUCTION

This Advance Ruling is issued in respect of the tariff classification of a 6000 Tonnes Per Day (TPD) cement production plant, comprising integrated process systems for raw material preparation, clinker production, cement grinding, dispatch, fuel handling, safety systems, and electrical installations.

Due to transportation and logistical considerations, the plant may be imported in multiple consignments (batches). Notwithstanding this, the equipment collectively constitutes a complete industrial plant designed for cement manufacturing.

The objective of this ruling is to define the functional composition, process integration, and appropriate tariff classification of the plant and its constituent machinery in accordance with the applicable tariff provisions.

2. SCOPE OF THE RULING

Based on the submitted technical documentation, the cement plant comprises the following major process groups Raw Material Preparation & Raw Meal Production, Clinker Production (Pyro-processing), Cement Grinding, Cement Dispatch, Fuel Handling & Preparation, Safety Systems, and Electrical Systems. 

These sections are functionally interdependent and collectively perform the continuous production of cement.

3. PROCESS DESCRIPTION AND TECHNICAL ANALYSIS

Section / Process StageMachinery / EquipmentFunction
  1. Crushing System
Receiving HoppersReceive HG and LG limestone from quarry trucks/dumpers.
 Apron FeedersRegulate limestone feed rate into crusher.
 Roller ScreenSeparates fines and screens oversized material before crushing.
 Hammer CrusherReduces limestone size from up to 1000 mm to ≤80 mm.
 Belt ConveyorsTransport crushed limestone to storage/pre-blending yard.
 Belt Scales (Weighing Rollers)Measure material flow rate on conveyors.
 Bag FiltersControl dust emissions at crushing and transfer points.
2. Storage & pre-blendingTransfer StationsConnect conveyor routes and direct material flow.
 Belt ConveyorsConvey crushed limestone to stockpile area.
 StackerBuilds layered stockpiles for pre-blending.
 Reclaimers (Bridge Type / Side Scraper)Recover limestone uniformly from stockpiles.
 Pre-blending Yard (60,000 t)Stores and homogenizes limestone before raw milling.
3. Additives & Correctives HandlingReceiving HoppersReceive gypsum, shale, and corrective materials.
 Apron FeedersControl material discharge from hoppers.
 Hammer CrusherCrushes additives where size reduction is required.
 Belt ConveyorsTransport additives to storage/feed bins.
 Belt ScalesMeasure additive feed quantities.
 Bag FiltersRemove dust and maintain environmental compliance.
4. Raw Material Proportioning & FeedingFeed Bins (HG, LG Limestone, Shale)Store materials prior to dosing.
 Belt Weigh FeedersAccurately proportion raw materials to target mix.
 Belt Conveyor (Mill Feed)Transfers blended materials to raw mill.
 Rotary Airlock / Rotary FeederFeeds material while preventing air leakage.
5. Raw Material GrindingVertical Roller Mill (VRM)Grinds raw materials into fine raw meal.
 Dynamic SeparatorSeparates fine meal from coarse rejects.
 Grinding TableRotating grinding surface in VRM.
 Mill FanProvides airflow for drying and conveying.
 Hot Gas Generator / Preheater GasSupplies hot gases for drying raw materials.
 Water Injection SystemControls mill outlet temperature.
 Magnetic SeparatorRemoves ferrous contaminants.
 Metal DetectorDetects metallic tramp materials.
 Pneumatic Two-Way GateDiverts material flow.
 Recirculation Bin (Load Cells)Stores and weighs coarse rejects.
 Variable Speed Belt ConveyorControls material feed rate.
 Recirculation Bucket ElevatorReturns coarse material to mill.
 CyclonesSeparate raw meal from gas stream.
 Bag FiltersCollect fine dust from exhaust gases.
 Screw SamplerCollects raw meal samples for laboratory testing.
6. HomogenizationAir SlidesPneumatically convey raw meal.
 Bucket ElevatorsLift raw meal vertically to silo.
 Homogenization Silo (16,000 t)Blends raw meal for consistent kiln feed chemistry.
 Dedusting SystemsRemove dust from silo and transfer points.
7. Preheating & Pre-calcinationCyclone Preheater (5-stage, Double String)Uses kiln gases to preheat raw meal.
 Pre-calciner (Low NOx)Achieves 90–95% calcination before kiln entry.
 Tertiary Air Duct (TAD)Supplies hot air from cooler to calciner.
 Air BlastersPrevent build-up/blockages in cyclones and ducts.
 DampersControl airflow and gas pressure.
8. Rotary Kiln (Burning)Rotary KilnConverts raw meal into clinker at ~1450°C.
 Multi-fuel BurnerBurns coal, gas, or HFO for heat generation.
 Kiln Drive System (Girth Gear & Pinion)Rotates kiln shell.
 Variable Frequency Drive (VFD)Controls kiln rotational speed.
 Emergency Drive SystemRotates kiln during power failure.
 Kiln Shell ScannerDetects shell hot spots.
 Kiln HoodEncloses discharge area of kiln.
 Kiln Inlet & Outlet SealsPrevent false air ingress.
 Burner PlatformSupports burner maintenance access.
 Motorized HoistLifts heavy kiln components.
 Support Rollers & BearingsSupport kiln shell during rotation.
 Water Cooling SystemCools bearings and components.
 Axial Cooling FansExternal shell cooling.
 HFO TanksStore heavy fuel oil.
 Kiln WalkwayInspection and maintenance access path.
9. Clinker CoolingGrate CoolerRapidly cools clinker and recovers heat.
 Cooling FansForce cooling air through clinker bed.
 Roller CrusherBreaks clinker to <30 mm.
 CCTV Monitoring SystemMonitors clinker bed and cooler operation.
10. Clinker Handling & StoragePan ConveyorTransfers hot clinker from cooler.
 Belt ConveyorsMove clinker to silo/storage.
 Clinker Silo (60,000 t)Main clinker storage.
 Off-spec Clinker Silo (1,500 t)Stores rejected clinker separately.
 Automatic Discharge SystemControlled extraction from silos.
 Truck Loading SystemLoads clinker to trucks.
11. Gas Cleaning & DedustingCyclonesPrimary dust separation from gas stream.
 Main Bag Filter (Pulse Jet)Removes fine dust from exhaust gas.
 Induced Draft (ID) FanDraws gases through kiln system.
 Booster FansSupport gas flow in ducts.
 Water Spray Cooling SystemLowers gas temperature before filters.
 Chimney (Stack)Releases treated gas to atmosphere.
12. Material DosingHoppers (Clinker, Gypsum, Limestone)Store materials before cement grinding.
 Belt Weigh FeedersMeter materials accurately to mill.
13. Grinding SystemBall Mills (2 Units)Grind clinker and additives into cement.
 Grinding Media (Balls)Crush and grind inside mill.
 Mill Drive SystemPowers ball mill rotation.
 Grinding Aid SystemImproves grinding efficiency and reduces coating.
14. Classification & Product HandlingHigh-Efficiency SeparatorSeparates fine cement from coarse returns.
 Bag FiltersDust collection from mill and separator.
 Air SlidesPneumatic cement conveying.
 Bucket ElevatorsVertical transport of cement.
 Impact Flow MeterMeasures cement flow rate.
15. Cement StorageCement Silos (2 × 15,000 t)Store finished cement.
 Feed Bins (Silo Cone)Control cement discharge flow.
 Air SlidesConvey cement from silos.
 Shut-off GatesIsolate cement flow.
 Pneumatic ValvesAutomated discharge control.
16. Packing & DispatchPacking Machines (5 × 120 t/h)Fill cement into bags.
 Packer ElevatorFeeds cement to packers.
 Vibrating ScreenRemoves lumps before packing.
 Surge HopperTemporary storage before dispatch.
 Manual Truck Loading Stations (10 Units)Load bagged cement trucks.
 Bulk Loading System (200 t/h)Load cement into bulk tankers.
17. Coal HandlingReceiving HopperReceives coal deliveries.
 Apron FeederRegulates coal discharge.
 Belt ConveyorsTransport coal.
 StackerBuilds coal stockpile.
 ReclaimerRecovers coal from stockpile.
 Coal Storage YardCoal storage area.
17. Coal GrindingVertical Roller Mill (Coal Mill)Pulverizes coal into fine fuel.
 Dynamic SeparatorSeparates fine coal from coarse particles.
 Bag FilterCollects coal dust.
 Screw ConveyorTransfers pulverized coal.
18. Fuel FeedingCoal Feed BinsIntermediate coal storage.
 Belt Weigh FeedersControls fuel feed rate.
 Coal Dust Silos (2 × 70 t)Store pulverized coal.
 Rotary Weigh FeedersAccurate coal dosing to burners.
 Pneumatic Conveying SystemTransfers coal dust to kiln/calciner.
19. Safety SystemsExplosion-Proof MembranesRelieve pressure during dust explosions.
 Nitrogen Inerting SystemPrevent ignition by reducing oxygen level.
 Shut-off DampersIsolate airflow during emergencies or maintenance.
20. Air-pressureRoots BlowersSupply high-pressure air for conveying, aeration, combustion, cooling, and dust control.
21. Electrical EquipmentMV SwitchgearControls and protects medium-voltage power distribution.
 Distribution TransformerSteps down MV power to LV supply.
 VSD Input TransformerSupplies conditioned power to variable speed drives.
 MV Capacitor PanelImproves power factor and voltage stability.
 LVD Incomer PanelMain low-voltage incoming distribution panel.
 LVD PanelsDistribute low-voltage power plant-wide.
 MCC PanelsControl and protect motors.
 LV Compensation UnitAutomatic LV power factor correction.
 ACC PanelsPLC-based automation and control center.
 Diesel GeneratorBackup power during grid failure.
 Oil TankStores diesel fuel for generator.
 Diesel Generator LV PCC PanelsControl and distribute emergency generator power.

 

TARIFF CLASSIFICATION

In line with the description and technical analysis above, all components of the plant are integrated and engineered to function as a single continuous production line, with each section contributing to the principal function of cement production.

Pursuant to Note 4 to Section XVI, which provides that:

“Where a machine (including a combination of machines) consists of individual components (whether separate or interconnected by piping, transmission devices, electric cables or other means) intended to contribute together to a clearly defined function covered by a heading in Chapter 84 or 85, the whole is to be classified in the heading appropriate to that function,”

It is established that the plant constitutes a combination of machines performing a clearly defined industrial function.

Accordingly, the 6000 TPD cement production plant falls under tariff heading 84.74, ‘Machinery for sorting, screening, separating, washing, crushing, grinding, mixing or kneading earth, stone, ores or other mineral substances, in solid (including powder or paste) form …’

Given that the core operation of the plant is crushing and grinding of mineral materials as part of the cement production process, the plant is specifically classified under Tariff Subheading 8474.20.00.00 - Crushing or grinding machines with 5% rate of duty and 0% VAT in accordance with ECOWAS CET 2022–2027.

Furthermore, in accordance with General Rules of Interpretation (GRI) 2(a), the classification of the cement plant components remains classifiable under heading 8474.20.00.00 whether the plant is imported complete or in incomplete, assembled or disassembled due to reasons such as requirements or convenience of packing, handling or transport. See Explanatory Note V to GIR 2a.

 

LEGAL JUSTIFICATION

  • GIR 1, Note 4 to Section XVI
  • GRI 2(a) & 6
Tariff classification / rules of origin
8474.20.00.00
Legal framework (GIRs) applied / PFTA RoO criteria (ETLS, AfCFTA)
Not stated