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MyPronamic

Name: MyPronamic
Address: Düsseldorf, 40549, DE
Telephone: +4921153530

Put Success on Repeat! Entrust the care of your mill to the pioneers in vertical mills with over 111 years' experience.

02/09/2026

The welding is finished, but the checks continue.

After installing the refurbished grinding parts, our engineers can continue with process optimization. The mill returns to operation with restored grinding surfaces, while its operating parameters provide the basis for checking and adjusting process conditions.

Pressure, temperature, O₂ content, power consumption and volume flow are among the parameters used in this work. PRONAMIC® service packages can also include mechanical audits, supervision and recommendations alongside periodic hardfacing.

The post-refurbishment period is part of our service scope. Our engineers assess the condition of the grinding parts together with the operating data as the mill returns to production.

26/08/2026

What “self-shielded” means during hardfacing

PRONAMIC® H1, H2 and T2 are self-shielded flux-cored welding wires used in the manufacture and refurbishment of grinding tyres and plates for vertical mills.

As the tubular wire melts, the compounds within its core protect the molten weld metal from the surrounding atmosphere. This means that the welding process does not require an externally supplied shielding gas.

Self-shielding is one part of the welding procedure. Each wire diameter has specified current, voltage and stickout ranges, and the deposited layers form the wear-resistant surface. The alloy composition of these deposits differs between the H1, H2 and T2 wires according to their intended application.

During refurbishment, the selected wire can be deposited over an existing worn layer using the specified welding procedure, rebuilding the working surface while the component remains installed in the mill.

19/08/2026

A changing SCM supply may require a different wear-part strategy before a new spare part becomes necessary.

Changes in the type, source, or proportion of SCM can introduce different levels of abrasivity and moisture into a vertical roller mill. These properties can lead to different grinding conditions and wear patterns across grinding tires and plates.

This means wear-part planning cannot rely solely on performance recorded with the previous feed. Inspections and operating data provide the basis for assessing the wear associated with the current material mix and whether the existing wear-part specification remains appropriate.

If a change in wear behavior points towards replacement, planning ahead gives the plant time to review the material specification and prepare the correct components for the next scheduled maintenance period. The decision can then account for the materials the mill is expected to process during the next operating cycle.

11/08/2026

In the past, forge welding joined heated metal through pressure and hammering, and the quality depended largely on the smith’s skill. When electric arc welding appeared in the late nineteenth century, it introduced a controllable heat source. Later equipment let welders regulate the current and the amount of metal deposited, making the results more consistent.

With this improved control, welding could repair worn surfaces. In hardfacing, wear-resistant alloys are deposited where material has been lost to restore the working profile. This is done when inspection confirms that the underlying structure remains suitable for continued use.

This method can reduce the new material required compared with a complete replacement. When repair is appropriate, the worn area is rebuilt while the steel body remains in service. This postpones full replacement and reduces the material and manufacturing work required for a new component.

06/08/2026

Designing a grinding component around separate material functions.

The working surface of a grinding component faces continuous abrasion. Beneath this surface, the component must withstand the mechanical loads generated during grinding. These conditions call for hardness at the surface and toughness in the main structure.

PRONAMIC® multilayer components allocate each function to a suitable material. A tough structural steel base is connected to the wear-resistant working surface through transition layers.

This construction also creates practical maintenance options. With suitable equipment and materials, following approved procedures, the worn surface can be restored while the structural base remains in service.

The specifications and application limits for each PRONAMIC® option are available in our technical datasheets. ⟶ https://www.mypronamic.com/parts/

30/07/2026

Manufacturing a new grinding tire or grinding plate requires producing an entire component. Steel is melted, cast, machined, transported, and installed before it enters service.

Refurbishment follows a different principle. In most cases, the structural body of the grinding component is suitable for continued operation. Only the hardfaced working surface, which has been worn down by abrasion, is rebuilt to restore the original grinding geometry.

At PRONAMIC®, we carry out hardfacing in situ or refurbish components in one of our workshops. This process restores the working surface, preserves the original component, and returns it to service according to OEM specifications. By rebuilding only the material lost through abrasion, refurbishment avoids manufacturing and installing a complete replacement whenever the structural component remains suitable for continued use.

21/07/2026

A grinding component begins service with a surface designed for a specific operating environment. During the final manufacturing step of hardfacing, abrasion resistance is built into the deposited layer through the composition of the welding wire and the alloying elements used to produce it.

Each wire specification is formulated for a specific range of grinding applications. H1 is used for general wear conditions, H2 incorporates vanadium carbides for higher abrasion resistance, and T2 combines chromium carbides with niobium, molybdenum, tungsten, and vanadium carbides for applications that demand a more specialized material system. These metallurgical differences remain in the deposited layer throughout the component's operating life.

Once deposited, the hardfacing layer becomes the working surface of the grinding component. Its material characteristics determine how the surface responds to wear throughout service and how it can be restored during refurbishment. Selecting the appropriate hardfacing specification establishes the wear behaviour of the component from its first operating hour.

15/07/2026

Grinding components operate within a constantly changing environment where feed characteristics, separator performance, circulation loads, and airflow all contribute to the conditions they experience over time. The same material can perform differently as these operating conditions evolve throughout successive campaigns.

For this reason, evaluating wear is not limited to the condition of the component. Wear profiles are considered alongside the operating environment in which they developed, helping explain why material loss is distributed the way it is and how refurbishment can be planned more effectively.

Material selection remains an important part of wear management, but so does understanding the process surrounding the component. Bringing these two together connects refurbishment strategies with stable mill operation and the continued use of grinding parts over multiple service cycles.

08/07/2026

Before a roller is rebuilt, performance begins inside a drum.

Wear performance is typically associated with the finished grinding component. In practice, it begins with the chemistry of the welding wire. During hardfacing, this chemistry forms the carbide structures within the deposited layer, establishing the wear characteristics of the grinding component throughout its service life.

This is why we developed multiple wire specifications for different grinding applications.
✅ H1 is used in standard wear conditions.
✅ H2 incorporates vanadium carbides for applications with higher abrasivity.
✅ T2 combines chromium carbides with complex niobium, molybdenum, tungsten, and vanadium carbides for demanding wear environments.

Selecting the wire based on operating conditions produces a hardfacing layer that matches the application and planned refurbishment cycles.

Each refurbishment cycle becomes part of the component's service life. The deposited material is renewed while the base casting continues in service, preserving the grinding geometry across multiple operating periods. Fitting the hardfacing specification to the application stabilizes the wear profile across successive maintenance intervals. The welding wire becomes part of the engineering behind long-term mill performance.

30/06/2026

Hardfacing has its roots in a much broader development in industrial maintenance. When arc welding was adopted by industry at the end of the 19th century, components could be repaired directly on site, making refurbishment a practical alternative to replacement and extending the working life of industrial equipment. From that point on, maintenance included restoring components as well as replacing them.

Hardfacing uses the same welding processes to restore surfaces exposed to wear. Wear-resistant alloys are applied to a structural base to rebuild the working surface, all while the original component remains in service. The result is a combination of two material functions: a structural base that absorbs mechanical loads and a wear-resistant surface designed for demanding operating conditions.

PRONAMIC® grinding tires and grinding plates use this construction, combining a structural steel core with multilayer hardfacing, such as types H1 and H2. Each refurbishment cycle restores the working surface while preserving the geometry necessary for stable grinding conditions. Rebuilding the wear layer becomes part of the component's planned lifecycle, supporting repeated use of the original part.

Refurbishment has become an established part of wear management in vertical roller mills. It reduces the demand for new materials, extends the use of existing components, and avoids the need to manufacture, transport, and install a complete replacement when the original component can remain in service.

Adresse

Düsseldorf
40549

Öffnungszeiten

Montag	09:00 - 17:00
Dienstag	09:00 - 17:00
Mittwoch	09:00 - 17:00
Donnerstag	09:00 - 17:00
Freitag	09:00 - 17:00

Telefon

+4921153530

Webseite

https://mypronamic.com/

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