Flow Measurement & Control


Krohne monitors Australia's largest coal exporters

July 2011 Flow Measurement & Control

One of Australia’s largest exporters of seaborne metallurgical coal operates mines in central Queensland supplied by fresh water extracted from borehole fields, rivers and dams. It owns and operates hundreds of kilometres of pipelines, through which it moves mega litres of fresh water per year to its operations and to the local mining communities. For monitoring raw water in the network, Krohne Australia supplied 26 Waterflux 3070 C battery operated standalone water meters.

Access to a reliable source of water is an essential requirement for coal mines. Even those that do not wash the product through a preparation plant need significant quantities for dust management, drilling, human consumption and numerous other uses. The monitoring of water use to support mining operations in remote areas represents a significant challenge to all mineral companies operating in Australia, as often the infrastructure and management systems provided by the company are also used to supply local communities and rural industries. Measurement and balancing of water flows can allow investigation and analysis into water management and substitutions, an essential pre-requisite to gaining better understanding of water consumption in a comprehensive water flow network.

As mechanical water meters require a high level of maintenance and have inaccuracies eg, when measuring large variations in flow rates, the company chose Krohne’s battery powered, maintenance-free electromagnetic water meter, to provide a reliable solution for the mine and community remote water monitoring needs. The Waterflux 3070 has a unique flow sensor design with rectangular cross-section allowing for a significant reduction of magnetic field excitation, the coils arranged so that a strong, homogeneous magnetic field is formed. The measurement is therefore independent of the flow profile and measurements are very stable. This results in a very good low flow performance and allows operation without inlet and outlet runs. Further, the Rilsan liner of the flow sensor is highly resistant to pressure or vacuum conditions, corrosion and ageing. An optional data-logger and GSM module allows for remote meter reading and wireless transmission of measurement data and status information.

For more information contact John Alexander, Krohne SA, +27 (0)11 314 1391, johna@krohnesa.co.za, www.krohne.com



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