McLanahan Provides Australian Gold Mine with Customized Downflow Sampling System


McLanahan Provides Australian Gold Mine with Customized Downflow Sampling System

McLanahan recently adapted one of its Falling Stream sampler designs to meet the needs of a gold mining application in Western Australia.

The mine processes 1,000 metric tonnes per hour of gold ore through high pressure crushing rollers, which tend to create a flaky product. To achieve a more cubic product, the mine asked McLanahan to add a DDC-Sizer to their process, as well as a sampling system to collect samples of the DDC-Sizer reject sent to the agglomerator.

“The overhead clearances were pretty tight for the project, so we had to adhere to a certain vertical clearance so that we could fit into the project envelope,” said Adam Orner, product manager for sampling systems at McLanahan.

In addition to the height limitations, the primary sampler also had to accommodate the output of the DDC-Sizer. In accordance with these specifications, McLanahan designed a two-stage sampling system consisting of a primary sampler and a secondary horizontal carriage bottom sampler.

“The horizontal cart layout gives you the best low profile setup you can get with a Falling Stream machine,” Orner said.

A secondary horizontal cart bottom discharge sampler will take a sample of the increment collected by the primary sampler.

Horizontal Carriage Bottom Dump Samplers

Horizontal cart bottom dump samplers are a type of downflow sampling system. They collect increments of samples by passing a knife through a flow of material as it falls from one machine or conveyor belt to another machine or conveyor belt.

With the horizontal carriage arrangement, the cutter is oriented towards the side of the drive carriage. As the chain drive moves the carriage from one end of the machine to the other and back, the cutter moves back and forth through the flow of falling material to collect the sample. When the bur reaches the unload end, the door at the bottom of the bur opens to release the sample material.

“Horizontal cart bottom dump samplers can handle just about any type of material,” said Orner. “They are very adaptable and very well suited to a variety of materials.”

For this application, the main sampler extracts sample increments from the DDC-Sizer product stream and unloads them onto a vibrating feeder. The sample is then delivered to the secondary sampler with a controlled feed. The final samples are removed from the vibrating feeder stream by the secondary sampler and delivered to a four station rotary sampler manifold. Material rejected from the secondary sampler is discharged into the agglomerator feed chute and reintroduced into the process stream.

“Ultimately, we’re going to help them collect representative primary and secondary samples so they can bring those samples back to the lab for processing to develop good data to make decisions with their process,” Orner said.

Offer the right solution

This project is just one example of how McLanahan tailors its equipment to meet the specific needs of its customers.

“We always start with understanding the app – what the customer is trying to do and how they’re going to do it,” Orner explained. “We try to gather as much information as possible from the customer to put together a sampling solution that best meets the requirements of the application. ”


McLanahan Company published this content on November 15, 2021 and is solely responsible for the information it contains. Distributed by Public, unedited and unmodified, on November 16, 2021 03:26:04 PM UTC.


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