• PLANT AND EQUIPMENT
The machine’ s versatility allows it to excel in a wide range of applications, including manufactured sand, gravel pits, recrushing unsaleable material, asphalt and concrete sand and even certain industrial minerals. Where other technologies may falter due to high abrasiveness, low crushability, moisture or fines, the HRC™ 8 delivers.
“ The ability to adjust product gradation on the fly by regulating pressure – rather than changing the roll gap – means unmatched flexibility,” Marais says.“ You can optimise for output, energy efficiency or product quality depending on your operational goals.”
He adds that the HRC™ 8 also stands out for its energy performance.“ Compared to other technologies, it can achieve energy efficiencies of up to 90 %, depending on configuration. And because the machine reduces circulating loads, you are not wasting energy on reprocessing material.”
From its ability to handle difficult feed to its contribution to circular economy principles, the HRC™ 8 delivers on multiple fronts: performance, sustainability, cost efficiency and safety. It is not just another crusher; it is a solution that enables a new way of thinking about sand and aggregate production. •
Source: supplied by Pilot Crushtec
Installed on site, the Metso HRC 8 enables producers to convert previously unsaleable material into a profitable, high-value product.
• CRADLE TO GRAVE
SEPARATION ANXIETY: VIBRATORY SCREENING OF BULK MATERIALS
By Susie O Bartoli, business development specialist, Vibration, Martin Engineering
From quarrying and mining to recycling and agriculture, a multitude of industries rely on screen vibration for various purposes, but they often encounter similar problems. If the screening rack is properly engineered to accommodate the weight, volume and type of motion, then the support structure will rarely require maintenance. However, vibration is commonly created by a vibratory motor with moving parts that continually combat resisting forces, as well as the harsh industrial environment of bulk handling, which inevitably reduces the equipment ' s life
The need for vibratory screening requires operators to ensure that the periodic replacement of vibrators is factored into the cost of operation. Increased speeds, high G-forces of acceleration and power-intensive applications can cause extreme heat and wear on internal components, primarily the windings and bearings.
Punishing processing conditions, such as high ambient temperatures, dusty environments, excessive material, and severe weather, can also expose this equipment to damage. Even with a sturdy vibrator motor design, the constant motion and high heat can gradually wear down the bearings and winding insulation over time.
The period between potential breakdowns depends on several factors. Some of the most important include the operating environment, centrifugal force requirements, the condition of incoming power, lubrication type and intervals, and the vibrator ' s design and build quality. This article will explore vibratory screening applications, how they affect material separation, and how a well-designed vibrator can improve efficiency and reduce operating costs.
Volumes and vibratory screening Since the early 20th century, the demand for mineral resources has steadily grown, forcing bulk handlers and material recyclers to continually increase production volumes. 1 When it comes to screening, this can impact the quality and accuracy of the separation process. Simply increasing the volume or speed of throughput might require the material to undergo several passes to achieve proper separation.
34 • African Mining • April 2026 www. africanmining. co. za