Tag Archives: jaw crusher

SIMPEC awarded significant Cloudbreak crusher contract from Fortescue

SIMPEC’s relationship with Fortescue Metals Group continues to strengthen, with the engineering contractor set to replace two Metso Outotec Nordberg® C160 jaw crushers at the miner’s Cloudbreak iron ore operation in the Pilbara of Western Australia.

The WestStar Industrial Ltd subsidiary’s new contract for the Hopper 5 Jaw Crusher Replacement project is the first win directly from Fortescue but is far from the first time the company has stepped on site at one of its mines. SIMPEC has previously carried out work on its operations after being subcontracted by the likes of Central Systems, Energy Power Systems, ATCO and others.

The scope of the jaw crusher contract includes removal of all structural and mechanical items required to access the jaw crushers, followed by reinstatement on completion of the change out. It also includes maintenance works and modifications to the existing Hopper 5 hoppers, chutes and screens, SIMPEC said.

Worth A$2.1 million ($1.6 million), the vertical contract has commenced immediately, with works expected to be completed in April.

SIMPEC Managing Director, Mark Dimasi, said: “It has been a long-term goal of SIMPEC to work directly for Fortescue and to break into the field of sustaining capital works. By building our sustaining capital portfolio, SIMPEC aims to achieve a more stable cash flow as well as provide continuity for our workforce.

“This is a very proud moment for the team, and we look forward to successful completion of this project and what we hope will be a long-term relationship with Fortescue.”

Henkel LOCTITE 270 shores up jaw crusher operation in Australia

Henkel’s LOCTITE® 270 adhesive thread locking has come to the rescue of a mining operation in Australia that was facing a potential collapse of the jaw crusher equipment frame.

According to Henkel, the failure of a threaded assembly through self-loosening not only risks lost production but also worker safety. This was the case at the Australia mine site.

The M36 anchor bolts in question had been locked by spring washers that could not rise to the challenge of securing bolts on a piece of equipment subject to continuous vibration and high shear forces, according to Henkel. This resulted in the loosening – and, ultimately, breaking off – of anchor bolts and the collapse of concrete footings.

Spring washers, also known as lock or helical spring washers, are one of the most popular mechanical devices for securing threaded fasteners against self-loosening, Henkel says. The washer is squashed flat when the nut is tightened against the mounting surface so that its sharp edges dig in to prevent the threaded fastener unwinding.

In practice, a spring washer may delay the length of time it takes for the bolt to loosen, but it will not permanently prevent it, according to Henkel. “The main reason is that the split washer does not solve the gapping issue, the free space remaining between the threads of the nut and the bolt,” it said.

On a typical threaded assembly there is just 15% efficient metal-to-metal contact between the threads. Everything else is empty space that enables plenty of side-to-side movement for the bolt. Additionally, being metal itself, a spring washer can cause damage to contact faces and corrode in place.

For the Australia mining operation, this problem was exacerbated by the size of the bolts. The bigger the bolts, the bigger the gap between threads, which leads to more vibrational impact on the assembly. This realisation resulted in the company changing to adhesive thread locking with LOCTITE 270, according to Henkel.

This is a high strength formulation that fills all gaps between the thread and prevents any movement of the bolt within the nut, according to Henkel.

“Secured this way, the assembly is completely vibration-proof but can still be easily dismantled with hand tools for repair and maintenance,” it said. “Additionally, the liquid thread locker seals the threads against humidity and dust, preventing corrosion and surface erosion.”

This simple adjustment to working practice has not only underpinned productivity but contributed to a safer working environment at the operation, Henkel says.

One 50 ml bottle of liquid thread locker is sufficient to secure around 850 M10 bolts but, unlike spring washers, can be used on any bolt size, according to the company.

Metso to help Pavlik Gold double processing capacity

Metso says Pavlik Gold JSC has chosen it as the supplier for the key crushing and grinding equipment for its ore processing plant in Magadan, Russia.

The Pavlik gold plant, which commenced its operations in 2015, currently produces around 225,000 oz/y of gold. With the new equipment, the plant expects to double its ore processing capacity and increase gold production, according to Metso.

Metso’s delivery consists of the primary crushing station with a Nordberg® C160™ jaw crusher, one SAG mill and two ball mills with a total installed power of more than 20 MW. The circa-€25 million ($27 million) order has been booked in Metso’s March quarter orders received, with delivery expected to take place in the first half of 2021.

Alexey Muzychkin, SVP, Russia and CIS, Metso, said: “We greatly value our long-term cooperation with Pavlik Gold, where Metso’s equipment has been in use already for several years. We are sure that the experience and technical competence of both companies in this type of projects will help us rapidly achieve the goals.”

Earlier this month, FLSmidth announced that it would supply a new 7 Mt/y gold processing plant to the mine. 

Metso equipment to rough up diamonds at De Beers Venetia mine

Metso is to install high-performance crushing and material handling equipment underground at the De Beers Group’s Venetia diamond mine, in South Africa, as part of an order booked in the September quarter.

In the throes of a transition from open-pit mining to underground operations, Venetia is reported to produce around 4 Mct/y, making it one of South Africa’s biggest diamond mines.

In 2013, an underground extension project commenced with plans to start producing carats in 2022, climbing to full production in 2025 and extending the mine life to 2046.

Metso said Venetia approached Metso to deliver two primary jaw crushers and a number of feeders. All the equipment will be installed underground, which is a very challenging installation, especially given the shaft constraints (dimensions) and weight limitations for transportation underground, the company added.

Venetia decided on Metso’s Nordberg® C Series™ jaw crusher range as the pinned and bolted design of the crusher allowed for the extensive disassembly, Metso said. “This enhances ease of transportation and installation, especially where there are critical space constraints such as an underground installation – as is the case with this project.”

The Metso apron feeders, meanwhile, are used for extracting or feeding ores that are wet, sticky, dry or even frozen.