ABOUT KRUL METALS

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Krul Ball Mill Liners are manufactured using optimized alloy compositions to withstand extreme impact and abrasion. The geometry and profile of a liner significantly affect grinding efficiency. Krul offers a full range of liner configurations, including:

• Single and Double Wave Liners  
• Multi Wave and Step Liners
• Wedge Bar Liners
• Smooth Liners

Each design is selected based on mill size, feed characteristics, grinding media, and process objectives to ensure optimal performance.

Our Ball Mill Diaphragms are supplied to improve material flow, chamber efficiency, ventilation, and wear life. The design and layout directly affect grinding performance, pressure drop and media retention. Krul offers a complete range of diaphragms, including:

• Intermediate Diaphragms
• Discharge Diaphragms
• Transfer / Open Diaphragms
• Double Outlet Diaphragms
• Slotted and Backside Plates

Each solution is selected based on mill size, chamber arrangement, airflow, feed character, and process objectives.

Lifter Bars / Wedge Bars are engineered to control media trajectory, protect the shell, and improve grinding efficiency in demanding mill environments. Krul supplies Lifter Bars in a wide range of: 

• Heights, Widths and lengths 
• Spacings and alloys
• Flat Spacing Wear Liners

Tailored to the application and desired ball movement. We also offer rubber and composite options, along with matching flat liner systems, for a complete and performance-driven liner package.

Built for one of the highest-wear zones in the mill, Ball Mill and Rod Mill Cone Inlet Headwall Liners play an important role in protecting the inlet area, regulating mill load, and supporting consistent grinding performance. These curved, bull-nose style wear plates are fastened to the mill head/end cover and can be tailored in curvature, thickness, and material grade to match the demands of the application.

Features and options:

• Custom liner curvature
• Alloy, thickness, wear grades
• Spoiler design 

A Ball Mill Trunnion is a critical cast component that supports the mill shell, maintains alignment, and serves as the material entry or discharge channel of the mill. 

Key Krul advantages:

• Heavy-duty cast construction
• Accurate machining and fitment
• Built for high load and continuous duty
• Reduced vibration and maintenance risk

Because it operates under significant bending and shear forces, trunnion quality has a direct impact on mill reliability, vibration control, and service life.

Cast as one solid piece, the Ball Mill Head / End Cover with Integral Trunnion provides structural support and serves as the material entry or discharge channel. This one-piece design reduces manufacturing and assembly complexity.

Krul Metals Offers:

• One-piece end cover and trunnion construction
• Reduced machining and assembly steps
• Reliable connection to the mill shell
• Supports mill load, alignment, and sealing

Where strength, fit, and structural reliability matter most connect with Krul Metals.

Krul Shell liners are built to handle the continuous interaction between grinding media and ore. Each liner is custom designed based on mill geometry, operating conditions, and ore characteristics, ensuring optimal charge motion, energy transfer, and wear distribution. 

We Evaluate:

• Charge dynamics and breakage behavior
• Lifter spacing-to-height ratios
• Face angle vs wear rate trade-offs
• Slurry flow and pulp lifter interaction
• Mill throughput vs liner configuration
• Multiple Design Solutions

Discharge End Cone receives slurry from the pulp lifters and directs it toward the discharge trunnion, making it a key wear and flow-control component. This zone is subjected primarily to abrasive discharge wear, the right cone design can improve material movement, reduce back-flow, and support stronger mill performance. Available options:

• Full discharge cone sections
• Replaceable discharge cover plates
• Flow-guiding internal cone segments
• Multiple mounting and segment arrangements

Inner Pulp Lifters are critical to slurry evacuation, wear life, and discharge-end performance in AG and SAG mills. Their design directly affects pulp movement, back-flow, pooling, and mill throughput.

Krul Metals features and options:

• Optimized channel designs for improved slurry flow
• Mill-specific profiles and section thicknesses
• Chrome-moly, martensitic, and white iron material options
• Reduced back-flow and improved discharge efficiency
• Stronger wear life in severe abrasive conditions

Engineered for high-performance our Discharge-End Outer Pulp Lifters are designed to move slurry faster, reduce pooling, and improve discharge efficiency. Available options:

• Curved Blade Outer Pulp Lifters
• Straight-Radial Outer Pulp Lifters
• Helical / Spiral Flow Lifters
• Perforated and slotted discharge sections

Krul Metals tailors the lifter geometry, channel profile, and open-area arrangement to the mill and application.

Vertical Tower Mill wear parts are critical to grinding efficiency, media movement, and long-term mill reliability. Components such as Vertical Grinding Mill Flights, Digging Shoes, and Internal Chamber Wear Liners help protect the screw and shell while maintaining the high-intensity grinding environment required for fine and ultra-fine milling.

Wear parts available:

• Vertical Grinding Mill Flights
• Vertical Grinding Mill Digging Shoes
• Internal Chamber Wear Liners
• End liners 
• Mainshaft Protection 

Vertical Roller Mill Rollers are the primary grinding components of the VRM, applying pressure to the material bed on the grinding table to deliver efficient dry grinding.

Krul manufactures:

• Cylindrical and tapered roller profiles
• Grinding roller tires / shells
• Grinding tables / grinding tracks
• Feed chute wear plates
• Wheel hubs 

With Krul Metals, the advantage is clear: superior fit, dependable wear life, and performance-driven components that help improve mill stability and efficiency. 

Steel Rod Mill performance begins with the quality of the Rod. Krul supplies premium grinding rods engineered from high-grade heat-treated alloy steel to deliver superior wear resistance, impact toughness, and consistent grinding performance.

Krul offers:

• Premium heat-treated grinding rods
• Custom diameters, lengths, and hardness ranges. (1.5" - 4" OD)
• High surface hardness with a tough core
• Reduced wear, breakage, and rod consumption
• Application-specific recommendations

The wrong Grinding Media / Grinding Balls costs you throughput, efficiency, and wear life. Krul Metals supplies high-performance forged and cast grinding media, including balls, short cylinders, and steel rods. We offer:

• Forged steel balls
• Cast steel balls
• Short cylinders and steel rods
• Wide range of sizes and alloys
• Size Range 13mm - 160mm

We help clients select the right media size, alloy, hardness, and toughness for the application.

A liner is only as reliable as the Bolt securing it. We supply premium Mill Liner Fasteners engineered for high-load, high-impact grinding duty, where failure is not an option. Designed for all types of wear plats, our fastening systems are built to improve clamping integrity and perform under punishing mill conditions.

What we offer:

• Premium liner bolts and fastening assemblies
• Custom sizes, materials, and protective coatings
• Washers and nuts

Krul provides mill fastening solutions!

Krul Metals designs and manufactures high-performance Dip Tubes / Immersion Tubes / Suspension Plates, engineered for preheater cyclones. Operating in high-temperature, high-velocity gas streams, these components play a critical role in gas-solid separation, airflow control, and heat exchange. 

Applications:

• Suspension Preheater Towers 
• Inline & Separate Line Calciners
• Cement, Lime, and High-Temperature Processing Plants

We engineer dip tubes specific to your cyclone stage and type.

Dip Tube Locking Plates (Retention Plates) secure immersion tubes within the preheater cyclone: 

Purpose: 

• Maintaining precise alignment and spacing with suspension plates. 
• They prevent movement, vibration, and misalignment under high-temperature, high-velocity conditions.

Krul Metals manufactures custom locking plates for all dip tube configurations, ensuring durability, stability, and optimal cyclone performance in abrasive and thermally demanding environments.

Fix Blocks secure dip tubes within the preheater cyclone by locking them into position using a bolted mounting system. Designed to fit over tube locating features, they ensure proper alignment and structural stability in high-temperature, abrasive environments. 

Key Features:

• Secure bolted fixation of dip tubes
• Designed to fit over tube locating features (“hump” design)
• Maintains alignment and structural stability
• Withstands high temperatures, abrasion, and thermal cycling
• Available in multiple sizes 

Krul Metals manufactures high-chromium, wear-resistant Flap Plates in various designs, including patterned surfaces for improved flow control and durability in extreme operating environments. Key Features:

• Controls airflow and maintains system pressure balance
• Reduces false air ingress and energy losses
• Designed for high-temperature, high-velocity gas environments
• Optional surface patterns to improve flow and reduce turbulence
• Manufactured from high chromium, wear-resistant alloys

Flap Boxes House and support cyclone flaps, forming a critical sealing and flow-control assembly within the preheater system. Designed to contain high-temperature, high-velocity gas streams, they ensure proper flap operation while minimizing false air ingress and maintaining pressure stability. Krul Metals manufactures flap boxes: 

• Various sizes and configurations
• Delivering durability
• Precise fitment
• long-term performance

Engineered housings that keep your cyclone sealed, stable, and efficient.

Krul Metals supplies heavy-duty Preheater Cyclone Dampers designed to control and stabilize high-velocity gas flow in extreme operating environments. Installed within ducts and transition zones, these components help regulate airflow, reduce turbulence, and protect critical areas from abrasive wear. The Damper grid pattern:

• Breaks up velocity
• Distributes gas more evenly
• Reduces localized wear
• Acts like a flow straightener

Our dampers maintain consistent pressure balance across cyclone stages.

The Kiln shell is the backbone of any Rotary Kiln, carrying the full mechanical load of the system while operating under extreme heat, continuous rotation, and demanding process conditions.

At Krul Metals, we manufacture high-performance Mill and Kiln Shells using premium-grade steel, precision forming, and full-penetration welding to ensure: 

• Maximum structural strength 
• Dimensional accuracy 
• Long-term reliability. 

Krul manufactures high-performance rotary Kiln Tyres (Riding Rings) designed to support and stabilize the full rotating mass of the kiln. Engineered for extreme thermal and mechanical conditions, our tyres ensure smooth rotation, proper load distribution, and long-term durability. Key Features: 

• Supports full kiln load
• Ensures smooth, stable rotation on support rollers
• Designed for high thermal, mechanical, and contact stresses
• Manufactured from high-strength, heat-resistant alloy steels

Krul Metals supplies high-performance Girth Gears engineered for rotary kilns, ball mills, and heavy-duty process equipment. Built from premium alloy steels and machined to strict standards, our gears deliver precision, durability, and reliability under extreme conditions.

Gear Configurations:

• Integral (One-Piece) Girth Gear
• Segmented / Split Girth Gear (Half or Multi-Segment)

Tooth Profile and Geometry:

• Spur (Straight Tooth)
• Helical Tooth
• Herringbone Tooth

Trunnions, also known as Support Rollers, are the load-bearing foundation of any rotary kiln, carrying the full weight of the rotating shell while ensuring smooth, controlled rotation. Their performance directly impacts: 

• Alignment
• Energy efficiency
• Equipment life

At Krul Metals, trunnions are designed and manufactured for maximum strength, precision, and wear resistance:

• High-quality carbon and alloy steel castings
• Optimized metallurgy for load and temperature
• Precision machining for accurate geometry

Krul Metals’ Mill and Kiln Thrust Rollers are engineered to control axial movement, stabilize kiln positioning, and protect critical components from excessive wear and misalignment. 

Positioned adjacent to the kiln tyre near the girth gear, Thrust Rollers are essential for managing the natural axial forces generated by inclined kiln operation, thermal expansion, and mechanical misalignment. 

• Mechanical Thrust Rollers
• Hydraulic Thrust Rollers (Preferred for Large Kilns)
• Custom-designed Thrust Rollers

In high-load rotary systems, Krul Metals’ Mill and Kiln Pinions deliver reliable torque transmission under extreme industrial conditions. Manufactured from high-strength forged steel and precision-machined for optimal gear meshing, our pinions ensure smooth operation and reduced wear.

Available in Helical and Spur configurations, our solutions are tailored to your application, whether you require high-load performance with minimal vibration or a cost-effective, robust drive system.

Kiln Spring Plates, commonly referred to as Leaf Plates, these components form the connection between the Girth Gear and the Kiln Shell. Krul Metals’ Kiln Spring Plate Assemblies are engineered with a focus on:

• Optimized stiffness vs. flexibility 
• Fatigue resistance under cyclic loading
• Uniform load sharing across all mounting points
• Precision tolerances for accurate installation, alignment.

Each assembly is designed based on kiln size, gear configuration, operating conditions, and load requirement.

At the kiln discharge, Kiln Nose Rings operate where thermal, mechanical, and abrasive forces converge. Positioned at the outlet, this critical interface demands durability, precision, and stability under continuous operation.

• Austenitic manganese & heat-resistant alloy options
• Designed for monolithic or brick interface systems
• OEM-specific geometries and bolt patterns
• Engineered for thermal shock and abrasion resistance

Across the kiln’s transition zones, Inlet and Outlet Castings function where heat, abrasion, and sealing requirements converge. These components protect the shell, support refractory systems, and manage material and gas flow during continuous operation. Configured as segmented assemblies, they accommodate thermal expansion while maintaining structural integrity and process stability.

• Heat-resistant alloy 
• Segmented designs 
• Supports sealing systems 
• Protects shell from abrasion

Engineered for the kiln discharge zone, Lump Breakers are designed to reduce oversized material and maintain consistent product flow, often integrated with Nose Ring assemblies.these components operate under extreme heat, abrasion, and mechanical impact. Their protruding tooth profiles break down large clinker or lime formations before discharge, protecting downstream equipment.

• Integrated or standalone discharge designs
• Reduces oversized material and blockages
• Protects discharge coolers 

Within the Kiln Discharge zone, Grates regulate material flow, airflow, and thermal shock at temperatures exceeding 1400°C. These components safeguard downstream equipment while supporting efficient cooling and stable clinker quality.

• High-chrome & nickel alloys for extreme wear and heat
• Optimized hole patterns for airflow and material control
• Resistance to thermal fatigue and mechanical stress
• Extended service life with reduced downtime

Cooler Grates are critical to clinker transport, cooling efficiency, airflow distribution, and heat recovery. Built to operate under extreme temperature, abrasion, and thermal cycling.

Available types include:

• Reciprocating grates
• Crossbar grates
• Control flow grates
• Modular grates
• Air slide grates
• Perforated and pocket grates
• Fixed and moving grate plates

Related components:

• Crossbars
• Support beams
• Beam-mounted grate assemblies

Cooler Room Side Liners are high heat-resistant accessory castings designed to reduce air leakage, protect cooler side zones, and support efficient clinker cooling. Because cooler systems vary widely, these components can be produced for many different cooler room layouts, movement systems, and sealing arrangements.

Krul offers:

• Side seal plates for multiple designs
• Heat resistant alloy options
• Custom profiles, thicknesses, and mounting arrangements
• Reliable sealing and longer service life

Cross Bars for cooler grates are critical to clinker transport, grate stability, and airflow control in the cooler room. Krul Metals manufactures cross bars in custom lengths, widths, heights, angles, and profiles to suit a wide range of cooler configurations.

• Heat- and wear-resistant alloys
• Precision cast fitment
• OEM and custom designs
• Improved durability and service life

Our proprietary alloys and application-driven designs help improve cooling efficiency, and reduce maintenance.

Operating in extreme cooler environments, Krul Metals’ Cast Steel Cooler Bar Clamps and Conveyor Cooler Drag Bars deliver reliable material movement inside cooler systems. Made from high-grade chromium alloys, they provide superior wear resistance and secure bar retention for efficient conveying. Fully customizable:

• Specific to your design
• Our components improve performance
• Reduce downtime
• Ensure long-lasting operation in high-temperature, abrasive environments.

Krul Metals supplies high-performance Cooler Inlet Grid Plates, designed for the critical transition between the rotary kiln and clinker cooler. The Inlet grid Plates absorb impact and distribute the clinker evenly. 

We Manufacture:

• Inlet Grid / Grate Plates
• Static Inlet Grates

Krul Designs the Inlet Grid to allow the fines and dust to drop, thus improving airflow and preventing buildup. We have a plethora of designs to assist with stabilizing the clinker bed prior to the reciprocating grates.

At Krul Metals, we combine proprietary alloy development, real-world process knowledge, and application-specific design to deliver Grate Bars that outperform standard OEM components. By tailoring each casting to your operating conditions, we help maximize cooling efficiency, improve clinker quality, and keep your plant running at peak performance. 

• Extreme Heat Resistance
• Superior Wear Resistance
• Optimized Cooling Performance
• Enhanced Material Handling
• Custom Engineered Designs
• Reduced Maintenance 

At the core of Drag, Scraper, and en-masse conveyor systems, these cast and Drop-Forged Chain links form a reliable foundation for heavy-duty conveying. Featuring a precision head-and-throat design, each link interlocks to create chains of any required length. Manufactured from high-grade alloy steels, they deliver exceptional strength, wear resistance, and reliability.

• Multiple sizes, pitches, and configurations
• Cast and drop-forged alloy steel options
• Supports welded or bolted attachments

For integrated material handling, this drop forged or Cast Chain Link features side-mounted attachments to accommodate scraper bars for efficient conveying and material movement. 

• Drop forged & cast construction
• Side lugs for bolted scraper bar attachment
• Custom sizes to match sprockets & pitch
• Multiple alloy options (high-strength, wear-resistant)
• Configurable for various bar styles & applications

Built for durability, alignment, and reliable performance in demanding environments.

Designed for aggressive material handling, T-Style Drag Chain (Cross Chain Links) features integrated flights for continuous scraping, conveying, and wear resistance in demanding environments.

• Integrated T-wings (flights) for efficient material movement
• Multiple flight heights & thickness options
• Drop forged or cast construction
• Hard-facing available for extended wear life
• Proprietary alloys for enhanced durability
• Compatible with various drive systems & sprockets

Built for heavier-duty conveying, Vaned Type 2 Drag Link Scraper Chain features a robust dual-connection (D-style) design with integrated flights for efficient material movement.

• Double-pin / dual-connection for added strength
• Integrated wings (flights) for aggressive scraping
• Multiple sizes, pitches & flight configurations
• Custom-engineered to suit application
• Hard-facing available for maximum wear resistance

Engineered to handle tougher loads, higher wear, and continuous operation.

Proven in demanding applications, Standard Double-Pin Drag Link Chain remains the most widely used solution for continuous conveying and scraping across heavy industries.

• Integrally cast pins for precise alignment & durability
• Reinforced wear zones at sprocket contact points
• Thick-profile links for high load resistance
• Optimized geometry for smooth material flow
• Available in multiple sizes, pitches & alloys

A versatile chain built for consistent performance and long service life.

Designed for the most demanding conveying conditions, D-Style Drag Chain features a robust double-pin design for superior strength, alignment, and extended service life in high-wear environments.

• DC, SD & HD variants for varying duty levels
• Reinforced bottom plates for added durability
• Optional flights for enhanced scraping performance
• Hard-facing available for extreme wear conditions
• Custom sizes, pitches & configurations

Built to handle tougher loads with confidence and consistency.

Pintle Chain / Haul Chain / Cast Mill Conveyor Chain Engineered for rugged conveying, delivers reliable performance in high-impact, abrasive environments. Featuring an open-barrel design, these chains minimize buildup while maintaining smooth, continuous operations. 

• Cast and fabricated construction options available
• Suitable for lumber, mining & bulk handling
• Multiple pitches, sizes & configurations
• High-strength alloys for durability and wear resistance

Optimized for high-throughput material handling, Krul Cast Steel Bucket Elevators deliver exceptional strength, wear resistance, and reliability in abrasive, high-temperature environments.

• Cast steel & ductile iron options available
• Reinforced front lip for improved digging performance
• Multiple sizes, styles & bolt patterns
• Designed for abrasive materials (cement, clinker, aggregate, ash)
• High resistance to impact, wear & thermal stress