Success Story - Magotteaux mining mill internals


Ernest Henry Mining wanted to alter the pulp chemistry to improve the flotation performance in its plant.

At Magotteaux, we specialise in delivering the optimal product for your application, fulfilling your specific requirements, so you can conquer your challenges with confidence. With a diverse array of alloys available, ranging from high chromium to chromium molybdenum steel and martensitic steel, we offer a wide range of options to cater for your needs. Our team of experts will guide you in selecting the optimal solution tailored to your unique grinding conditions. Rely on us to help you streamline and optimise your grinding process, unlocking its full potential.


After a series of promising laboratory test work, the decision was taken to convert the ball mill media charge from forged steel to high chrome media.


The improvements in the pulp chemistry resulted in an increase in copper and gold recovery of at least 1.3% and 1.0%, respectively. The additional copper in concentrate production reached up to 1430 tpy and 2840 ounces of gold per year, representing a $12.8 million USD increase in gross profit. Additionally, laboratory test work also indicated that the use of high chrome media could lead to reductions in pH during rougher, which would see no negative impact on the plant’s performance. In fact, once applied, this strategy realised an annual cost saving of $700,000 USD by reducing lime consumption.

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