Modern Mining December 2021

NaviCore 500 To minimise cost, exposure and risk to junior min- ers, the 500 tph maximum throughput NaviCore 500 mineral sizer is a compact unit featuring a primary sizer able to process any combination of wet, sticky and hard, dry material. The directly-fed unit requires no pre-screening and features a durable, heavy-duty design; opti- mised throughout with a variable-speed chain feeder; optional folding walkways for safe inspec- tion and maintenance, and optional hydraulic legs for faster setup times without the need for an instal- lation crane. The 36 t unit (including all optional equipment) with its operating height of 4,65 m, produces accurate product size with limited fines production. “When partnered with a conveyor system, this sizer unit enables efficient conveyor haulage directly from the mine face,” says Peeters. “It works directly with the excavator while sizing and delivering con- veyable material on to the conveyor haulage system, so eliminating the cost of running trucks.” At the core of the unit is the fit-for-purpose twin shaft mineral sizer featuring only elementary auxilia- ries to size the ore to specification. He says the NaviCore 500 with its feed size of up to 500 mm and nominal product size of between 100 mm and -180 mm (depending on the material) is intended for use with front-end loaders on smaller operations of up to 500 tph. “In terms of primary selection, 500 mm rocks are sized down to 150 mm after which a secondary NaviCore 150 can be used to size the ore to -50 mm, which is in line with Eskom’s specification,” says Peeters. Where only primary crushing is needed, a single unit will suffice but where secondary crushing is

called for, either a single secondary crusher or both systems can be used in tandem for primary-second- ary crushing. “We are looking at various financial models for the NaviCore fleet,” says Lombard. “It can be sold as a unit for either contract mining or for use by the junior miner themselves. “A second option is a build, own, operate and maintain solution whereby the client makes the financial investment but MMD supplies operational support. We can also provide an operator together with the unit.” The third option, says Peeters, is for the client to own and operate the unit while MMD takes care of the maintenance. The NaviCore system features a variable-speed chain feeder to lower cost and increase compact- ness. The feeder, which can be fed from either side, eliminates material surges and provides a point of control as it can be sped up or down. The unit also features an MMD 500 Series primary mineral sizer and a hydraulic folding conveyor which facilitates quick setup, take-down and relocation. 

The directly-fed unit requires no pre-screening and features a durable, heavy-duty design.

Key takeaways  The NaviCore System of mineral sizers is a compact unit featuring primary or secondary sizers, able to process any combination of wet, sticky and hard, dry material  The unit also features a proven MMD Mineral Sizer and a hydraulic folding conveyor which facilitates quick setup  The 36 t unit (including all optional equipment) with its operating height of 4,65 m, produces accurate product size with limited fines production  With its feed size of up to 500 mm and nominal product size of between 100 mm and -180 mm (depending on the material), the NaviCore 500 with is intended for use with front-end loaders on smaller operations of up to 500 tph

December 2021  MODERN MINING  17