Tag Archives: Dave Mueller

Martin Engineering cleans up conveyor operations with DT2S, DT2H

Martin Engineering, a leader in bulk material handling technologies and training, has announced the availability of two rugged secondary conveyor belt cleaners, both engineered for fast and easy maintenance.

The innovative design of the DT2S and DT2H reversible cleaners from Martin Engineering reduces system downtime and labour for clean up or service, while helping to prolong the service life of other conveyor components, the company says.

The models feature a unique split-track blade cartridge that slides in and out on a stainless steel mandrel, meaning the cleaners can be serviced or replaced without stopping the belt when on-site safety approvals are in place, Martin Engineering claims.

Dave Mueller, Conveyor Products Manager for Martin Engineering, says: “Even when the cleaner is encrusted with material, one half of the split frame can be removed so the cartridge can be changed in just five minutes. This allows users to have a spare cartridge on hand and quickly change it out when the blades need replacement. Then they can take the used cartridge back to the shop, clean it up and change the blades so it’s ready for the next service.

These secondary cleaners serve a wide variety of applications, including miningBoth products significantly reduce material carryback, and arr engineered to accommodate reversing conveyors to avoid damage to the belt or splicing, the company says. With steel blades and tungsten carbide tips set into a flexible base, the DT2 cleaners offer simple, effective solutions that can solve a number of carryback-related problems.

Martin DT2H Reversing Cleaner XHD

Designed for particularly demanding conditions, the DT2H Reversing Cleaner XHD is suited for heavy material loads on belts ranging from 400 to 2,400 mm wide that operate at speeds up to 6.1 m/s. 

The company explains: “Carryback accumulations along the return run of the conveyor can occur when the cleaning systems on a conveyor fail to remove most of the material that adheres to the belt after unloading its cargo. Increased build up results in unnecessary labour costs for clean up, and can lead to premature failure of conveyor components if left unchecked.”

Mueller said: Carryback can have an extremely sticky texture and abrasive nature, which can muck up conveyor components and contribute to premature failure. One key to the success of these cleaners is the blade’s negative rake angle (less than 90 degrees). With a negative angle, you get a ‘scraping’ action that mitigates potential belt damage, while delivering outstanding cleaning performance.”

Martin DT2S Reversing Cleaner

Like its larger counterpart, the Martin DT2S reversing cleaner can be installed on belts ranging from 400 to 4,800 mm wide. But, unlike the DT2H, the DT2S is designed for a lower maximum belt speed of 4.6m/s on belts with vulcanised splices. Mueller pointed out that this is primarily due to the difference in applications:The DT2S has a slim frame that allows it to fit in spaces as narrow as 7 in (178 mm). As a result, the DT2S can be attached to belts that may be too small for primary cleaners.”

Both of the DT2 cleaners can be used in medium- to heavy-duty environments, providing a lasting solution to a diverse array of complex problems that are caused by carryback and minimising  fugitive material, the company says.

Pueblo Viejo case study

An example of the cleaners’ performance can be found at the Pueblo Viejo Dominicana Corporation (PVDC) mine in the province of Sanchez Ramirez, about 89 km northwest of the city of Santo Domingo in the Dominican Republic. Operators at the operation, majority owned by Barrick, were experiencing excessive carryback and dust on its conveyor systemresulting in expensive equipment failures, unscheduled downtime and increased maintenance. Production is 365 d/y, but, between April and October, moisture can cause cohesion in fine clay particles, causing the cargo to become sticky. The substance had the consistency of thick toothpaste, which was also able to adhere small chunks of aggregate to the belt, causing destructive carryback that damaged pulleys and headers.

In just two weeks, Martin Engineering technicians replaced the existing belt scrapers at 16 locations with Martin QC1 Cleaner XHD primary cleaners fitted with low-adhesion urethane blades specifically designed for tacky material loads, along with DT2H secondary cleaners. The secondary cleaner blades can endure hot summer temperatures, high moisture content and constant production schedules, according to the company.

Following the upgrades, operations are now cleaner, saferand more productive, giving executives and stakeholders more confidence in the sustained operation of the mine, which is projected to be profitable for the next 25 years or more.  

Martin Engineering sizes up new compact conveyor belt cleaner

Martin Engineering addressed the problem of installing conveyor belt cleaning technology in areas where space is limited with the development of its new design SQC2STM RM (Reduced Mini) cleaner.

The SQC2STM RM is a compact secondary belt cleaner built with a narrow profile that resists material build-up.

Patented rubber buffers maintain cleaning pressure on the new design, engineered to deflect and allow splices to pass without damage to the belt or cleaner, even on reversing belts. The construction incorporates individually-cushioned stainless steel blades with tungsten carbide tips for effective cleaning with negligible risk to belt, splice or blade, and it can withstand even punishing operating conditions, including corrosive environments, high-speed belts and high-tonnage loads, according to the company.

The SQC2S RM requires just 134 mm (5.27 in) of space from the tip of the blade to the bottom of the mainframe, the company says.

Dave Mueller, Conveyor Products Manager at Martin Engineering, said it is not just the size of the cleaner that is a major selling point.

The blades of the cleaner conform to the belt profile and adjust individually to deliver continuous contact across the belt, he said.

“In a perfect world, bulk materials would load uniformly, wearing the blade evenly, but that rarely happens. By having multiple segments attached to a single rigid assembly, the tension can be maintained and adjusted accurately, quickly and safely,” he said.

Like the other designs in the SQC2 product line, blade removal and replacement is carried out by removing the lock pin from the main support assembly and sliding out the cartridge.

“The lock pins are a key component to Martin Engineering’s ‘no-reach design’, which allows workers to conduct their lockout/tag-out procedure more safely,” Martin Engineering said, adding that the unit is one of its Safety First™ family of products, helping customers achieve OSHA compliance.

The cleaner is suitable for belt widths from 450-1,829 mm (18-72 inches) and operating speeds up to 3.81 m/s (750 ft/min). It can be used in applications involving operating temperatures between -34°C and 149°C (-30°F and 300°F) and the design features all-steel powder coated construction (except for the rubber buffer).

Additionally, a dust-tight door to cover the opening for the mainframe has been designed to fit the reduced component size, for a clean, efficient installation, Martin Engineering says.

Similar to the original design, when the blade wears out, the removable cartridge allows easy replacement, so the end user can have a spare cartridge on the shelf and the service can be carried out in a “matter of minutes”, the company says.

Martin Engineering expects the SQC2S RM to be in demand in applications where installation space is at a premium, including biomass, recycling, waste-to-energy, trash sorting, foundries and steel production.