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Lime Powder Handling and Dosing in IBC’s by Matcon

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Matcon IBC  have worked in conjunction with Outotec and Goro to ensure the successful commissioning and installation of the IBC system on site at the Goro Nickel plant in New Caledonia.

The plant is one of the largest mining projects anywhere in the world. The expected annual capacity of the Goro Nickel project is 60,000t of nickel and 4,300 to 5,000t of cobalt, which represents around 20% of global production.

The plant’s process is based on Sulphur, which is fed in liquid form to a Sulphur burner. The SO2 generated in the furnace is being converted to SO3 prior to being transformed into Sulphuric acid. The Sulphur is shipped in solid form and will be molten on site.

Goro site operates a limestone plant, lime was readily available yet the transport and storage of lime to the Sulphur melting area and the dosing of lime due to its cohesive nature. This was until Matcon were contacted and the Matcon IBC System was deemed the best solution. The bulk density of the lime varied between 800 Kg/m3 and 1200 Kg/m3.

The Matcon IBC system incorporates the IBC and Discharge Station, both utilise cone valve technology. The Discharge Station incorporates a powerful lifting ‘probe’ which engages and locks into the cone valve in the IBCs. This action of cone valve promotes mass flow and prevents product Bridging or rat-holing. The height of discharge is configured to suit the material properties of the lime.

There are two off Lime dosing Discharge Stations on site, both located outside. They both have on load cells mounts for weighing which allows for Loss-In-Weight dosing. The operator selects the required batch weight and the PLC weigh controller controls the dosing of the lime into the process to the required weight and discharge rate. The initial discharge rate required was 50Kg/Hr with an accuracy of +/-5%.

With the help of Outotec and Goro, Matcon have worked to ensure that the commissioning and installation of the IBC system on site have been a success.

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