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Medium-Speed Coal Mill

Medium-speed coal pulverizers grind raw coal for boiler firing in thermal power plants. Common designs include bowl mills (RP), roller mills (MPS) and ball-and-race mills (E). Coal is crushed between the grinding elements and the table or ring, while hot air dries and transports the pulverized fuel. Wear parts are concentrated in the grinding element and table or ring systems.

Medium-Speed Coal Mill

Equipment Section View

Medium-Speed Coal Pulverizer cutaway part location diagram
Medium-Speed Coal Pulverizer cutaway part location diagram

Medium-speed coal pulverizers grind raw coal for boiler firing in thermal power plants. Common designs include bowl mills (RP), roller mills (MPS) and ball-and-race mills (E). Coal is crushed between the grinding elements and the table or ring, while hot air dries and transports the pulverized fuel. Wear parts are concentrated in the grinding element and table or ring systems.

Equipment Parts

Part Identification and Technical Details

Explore part names, images, material options and technical requirements. Select a card to open the corresponding replacement part page.

Major Components and Assemblies

Major Components and Assemblies

Individual and Maintenance Parts

Individual and Maintenance Parts

Grinding Roller / Roller Tyre
01

Grinding Roller / Roller Tyre

Grinding Roller / Tire

Material Options
Cr26 high-chromium cast iron / ceramic composite
Installation and Function
Main roller for coal grinding
Maintenance Category
High
Grinding Ring / Grinding Table Liner
02

Grinding Ring / Grinding Table Liner

Grinding Ring / Bowl Liner

Material Options
Cr26 high-chromium cast iron / ceramic composite
Installation and Function
Ring-shaped or disc-shaped wear part that works against the grinding roller
Maintenance Category
High
Grinding Ball (E-Type Mill)
03

Grinding Ball (E-Type Mill)

Grinding Ball (E-type)

Material Options
High-chromium cast iron / bearing steel
Installation and Function
Spherical grinding element in an E-type mill
Maintenance Category
High
Upper Race / Lower Race (E-type Mill)
04

Upper Race / Lower Race (E-type Mill)

Upper Race / Lower Race (E-type)

Material Options
High-chromium cast iron / alloy steel
Installation and Function
Upper and lower ball races in an E-type mill
Maintenance Category
High
Roller Shaft Bearing
05

Roller Shaft Bearing

Roller Shaft Bearing

Material Options
GCr15 bearing steel
Installation and Function
Support bearing inside the grinding roller
Maintenance Category
ZH
Roller Arm / Rocker Arm
06

Roller Arm / Rocker Arm

Roller Arm / Lever

Material Options
Alloy Steel 42CrMo
Installation and Function
Rocker arm applying grinding roller pressure
Maintenance Category
Low
Classifier Blade / Guide Vane
07

Classifier Blade / Guide Vane

Classifier Blade / Vane

Material Options
Cemented carbide / wear-resistant steel plate
Installation and Function
Coal classification blade in the rotary classifier
Maintenance Category
ZH
Classifier Cone Liner
08

Classifier Cone Liner

Classifier Cone Liner

Material Options
High-Manganese Steel / Hardox 400
Installation and Function
Protection for the classifier inner wall
Maintenance Category
ZH
Mill Shell Liner
09

Mill Shell Liner

Mill Housing Liner

Material Options
Hardox 400 / Manganese Steel
Installation and Function
Protects the inner wall of the mill housing
Maintenance Category
ZH
Air Inlet Duct Liner
10

Air Inlet Duct Liner

Inlet Duct Liner

Material Options
Wear-resistant ceramics / Hardox
Installation and Function
Protects the hot-air inlet duct
Maintenance Category
ZH
Trunnion Bearing
11

Trunnion Bearing

Journal Bearing

Material Options
Bearing steel / copper alloy
Installation and Function
Support bearing for the grinding roller trunnion
Maintenance Category
Low
Seal Air Nozzle
12

Seal Air Nozzle

Seal Air Nozzle

Material Options
Stainless steel / ceramics
Installation and Function
Seal air nozzle that prevents coal dust from entering the bearing
Maintenance Category
ZH

Materials for similarly named parts may differ by OEM, machine model and operating conditions. Confirm the machine model, OEM drawing number and measured dimensions before ordering or manufacture.

Material Information

  • High-chromium cast iron: a candidate material for grinding rolls and rings. Specify composition, carbide structure, heat treatment and hardness for the mill duty and part drawing.
  • Ceramic-reinforced metal matrix composites are used in some coal pulverizer wear parts. Xwin is a proprietary Magotteaux technology. Evaluate replacement parts against the actual material specification and part drawing.
  • Hardox 400/500: wear-resistant plate for housing liners and classifier cones.
  • Cemented carbide (YG15/YG20C): candidate grades for local wear inserts. Confirm separator blade materials, attachment and balancing requirements against the drawing.

Brand Applicability

Babcock & Wilcox (B&W) / B&W Roll Wheel, Mitsubishi Hitachi Power Systems (MPS), ALSTOM / GE, Shanghai Electric, Harbin Electric

Industry Applications

Coal pulverization for power station boilers, cement kilns and blast furnace injection, and pulverized fuel supply to boiler burners

Materials for similarly named parts may differ by OEM, machine model and operating conditions. Confirm the machine model, OEM drawing number and measured dimensions before ordering or manufacture.

Equipment Manufacturers and Series

Claudius Peters LOESCHE

Request a Medium-Speed Coal Pulverizer Wear Parts Proposal

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01

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02

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03

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04

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