1. Service Life of Steel Belt

The service life of a steel belt is affected by multiple factors. No accurate value can be given, since steel belts are widely applied with diverse functional requirements. In some industries and user sites, the service life can reach more than ten years, while in other cases it may only last several months. The key factors determining steel-belt service life are briefly described below:

(1) Human factors Deformation, deviation, impact cracking, bulging, scratches and other damages caused by improper operation. A standardized operating regime is of great importance.

(2) Equipment factors Unreasonable equipment design, aging components, malfunction of deviationcorrection or limit devices, absence of steel-belt protection devices, etc.

        (3) Working-environment factors

       -Operating speed

       -Load intensity

       -Operating duration

(4) Maintenance Carry out regular inspections to detect faults and perform repairs at an early stage. Periodically replace or clean devices and accessories that impair steel-belt performance.

What May Cause Steel-Belt Damage?

-Blocked materials or foreign objects entering the steel-belt zone

-Steel-belt guiding problems

-Chain damage

-Right-angle-edge friction of steel belt (resulting in hardening and tendency to crack)

-Insufficient effective cleaning leading to accumulation of dust, wood chips and other debris

-WarpageThe

steel belt is a critical component and industrial consumable within the complete equipment system. During operation, damage may occur due to improper manual operation or fatigue failure after years of service. Proper repair enables the steel belt to resume normal production and maximize product value.

Common Steel-Belt Damage Symptoms

(1) Straight edge cracks on the steel belt. If assessment confirms repair feasibility, simple spot-weld repair shall be performed. Work scope: steel-belt welding, grinding, stress relief, bonding guide rubber strips, etc.

Related note: For irregular edge cracks, patch-out welding shall be adopted. Work scope: Prepare material identical to the steel belt, cut out the damaged section of the steel belt for replacement, perform welding, grinding, stress relief, bond guide rubber strips, etc.

(2) Cracks in the middle section of the steel belt. If assessment confirms repair feasibility, insert-patch welding shall be applied. Work scope: Prepare welding tooling, prepare material identical to the steel belt, welding, grinding, stress relief, bond guide rubber strips, steel-belt commissioning, etc.

(3) Steel-belt deformation caused by various equipment faults. If assessment confirms repair feasibility, insert-patch welding shall be adopted. Equipment root causes must be resolved prior to welding to prevent secondary damage after repair. Severe overall deformation of the steel belt renders repair impractical. Work scope: Inspect and resolve equipment faults, prepare welding tooling, prepare material identical to the steel belt, welding, grinding, stress relief, bond guide rubber strips, steel-belt commissioning, etc.

The angle between scraper and steel belt shall not exceed 30°. This requirement is especially critical for the chemical industry because the scraper is metallic. If the angle exceeds 30°, the blade will directly scrape against the steel-belt surface.

(4) For bulging, deformation and other defects of the steel belt, repair or improvement methods can be selected according to assessment based on damage location and process requirements.

(5) Surface scratches and wear on steel belt. Inspect safety scrapers and other components in contact with the steel belt. Replace defective spare parts, then treat the steel belt; grinding can repair or mitigate such defects.

(6) Inspect equipment before startup. Prevent products and foreign objects from passing between steel belt and tension drum to avoid steel-belt damage. Mount safety scrapers as close to the tension drum as practicable.

(7) Steel-belt welding: NAUT manual-integrated TIG/L/M-P “seamless welding” technology. The optimal thickness tolerance can be controlled within 0.02 mm (compared with base material). Subject to steel-belt welding parameters and post-weld treatment, welding strength can reach 80 %-97 % of base-material strength.

NAUT Welding Process:

(8) Rubber-strip detachment during steel-belt operation significantly increases risk of steel-belt damage. NAUT special on-site rubber-strip bonding process enables fast and firm bonding of rubber strips onto steel-belt surfaces with high anti-detachment performance.

European-standard low anti-deviation & positioning rubber strips / European-standard high waterproof, anti-deviation & positioning rubber strips are used for positioning and anti-deviation purposes. They ensure stable and consistent operation and reduce vibration and displacement.

NAUT steel belts represent an ideal solution for the chemical industry. NAUT BELTS have been well verified in powder compactors, granulators, cooling flaker systems and other equipment. Whether under cooling-solidification-forming conditions at approximately 180 °C or 350 °C, NAUT steel belts consistently maintain flatness and long service life. This improves production efficiency and reduces production costs simultaneously.