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Modular plant bolsters gold production


A modular crushing and screening plant solution is playing a vital role in delivering production capacity for a New South Wales gold processing operation.

Dargues Gold Mine is located at Majors Creek in New South Wales, about 60km southeast of Canberra. The ore body was originally discovered in the early 1870s and was recently studied and identified as capable of supporting a viable underground mining operation. Owner Diversified Minerals is a leading underground mining services company within the Australian resources sector. This project is the first new gold plant to be approved in NSW in 10 years.

The team at Terex Jaques worked closely with DRA Global, an engineering design and construction house contracted by Diversified Minerals, to design and install the crushing and screening plant.

DRA Global approached Terex Jaques to design and develop a cost-effective modular crushing and screening plant with a quick set-up time to deliver the required production capacity to feed the gold processing plant downstream. 

The system components designed and manufactured by Terex include four modules: a MJ42 jaw crusher module with tipping grid, two MC1000 cone crusher modules with overhead surge bins and vibrating pan feeders, and a MHS6203 screen module. These modules are based off the pre-engineered modular product line offered by Terex Jaques and custom-engineered to fit the needs of the Dargues Gold Mine. Also included in the modular plant is a conveyor package consisting of a main feed conveyor, return conveyors to the cone crushers and a product conveyor feeding a large ore bin, primary station dust suppression, two self-cleaning magnets and a metal detector.


The Terex MJ42 modular jaw crusher features the rugged JW42 jaw crusher for high production. Its hydraulically actuated wedge system allows closed side setting (CSS) adjustments to be made quickly and easily. The crusher utilises heavy-duty components for optimum operation and long life. The module includes a vibrating pan and grizzly feeder with under jaw crusher conveyor. The 15m3 capacity hopper incorporates a tipping grid which protects the system from large oversize feed material. The jaw module has a fully galvanised bolt-together frame structure which allows for quick set-up time and comes with a pre-wired plug and play electrical control panel. Dust suppression is located at the tipping grid, over jaw crusher, under-jaw crusher and MJ42 discharge conveyor.


The MC1000 modular cone crusher handles an all-in-feed for continuous crushing. Its 1000mm cone has a full range of crushing chamber configurations to match short and long throw. The all-roller bearing design delivers enhanced crushing efficiency. Each cone module has a hopper with surge bins and vibrating pan feeders to regulate the flow of material to the cone crushers, providing safe control of the material while keeping the cone appropriately choke-fed. The cone module comes with an easy-bolt together structure for quick set-up time and ease of access around the crusher, surge bin and vibrating pan feeder for maintenance purposes.


The MHS6203 modular horizontal screen features the extremely efficient 1.8m x 6.1m, three-deck Cedarapids TSV horizontal screen with its legendary ElJay oval stroke action. The module consists of galvanised steel structures including walkways, stairs and guard rails for safe and easy access to maintain components with quick set-up time. Also supplied as part of the screen module is a discharge chute with blending capabilities, an under-screen fines conveyor and a pre-wired plug and play electrical control panel.


The modular plant consists of five main conveyors. The main feed conveyor collects product from the jaw crusher and two cone crushers and feeds directly onto the MHS6203 screen module. Return conveyors from the screen module carry oversize back to the secondary and tertiary cone crushers. A transfer conveyor from the screen module sends final crushed ore product out to a transfer point and onto the product conveyor which feeds directly into a large final ore bin. Also incorporated in the modular plant are two self-cleaning magnets and a metal detector to protect the crushers.

The operation at Dargues Gold Mine commenced in April 2020 with plans to process 330,000 tonnes of gold ore per annum. The plant is designed to produce a high grade sulphide concentrate. The end result is a state of the art, modern, environmentally friendly gold processing facility designed on the principles of ecologically sustainable development that will boast a very small surface footprint.


The modular and portable plants and static components offered by Terex Jaques are designed to work as one complete crushing and screening system. Modular and portable plants provide a pre-engineered solution that can be quickly and easily installed into new or existing installations while allowing for the flexibility required for the unique needs of an application or location.

The Terex Jaques applications team has years of valuable crushing and screening experience and can offer quarry producers expert guidance in choosing the right equipment for an efficient, cost-effective system. The support isn’t limited to installation. The team is available throughout the working life of every piece of equipment to provide advice, maintenance, and parts support for operational reliability and productivity.

The crushing and screening plant at Dargues Gold Mine.

Source: Terex Jaques