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3D Solid Scanning in Talc Production

3D Solid Scanning in Talc Production

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General process information

Talc rocks are excavated at the mine and are delivered to the warehouse at the start of the milling process.

Sorting the different talc ores according to their talc content and brightness is a key phase of the production process. Techniques include state-of-the-art laser and image analysis technology, friction sorting or flotation techniques. Before flotation process the ore goes through primary grinding in ball mill to obtain milled ore, impurities are removed in a cascade of flotation cells.

Talc concentrate slurry is thickened in settling tanks (slurry) before drying. The concentrate Talc is dried by pressure filters. The resulting filter cake is an intermediate product.

To obtain fine talc the talc cake goes through a jet milling process, resulting in a fine powder talc that is stored before packing or shipping in bulk.

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Ore Warehouse

Application: Talc ore is delivered from the mine to a warehouse at the start of the milling process.

Challenges: Talc ore is stored in piles in large warehouses. End-users need to accurately measure the inventory level on a daily basis. The Rosemount Solids Scanner delivers accurate real-time volume measurements of the talc ore inventory, regardless of warehouse size or the irregular surface of piles of material. The 3D Solids Scanner also provides a 3D display showing how the talc ore is distributed inside the silo, helping operators to improve management and control over inventories and related costs.

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Milled Ore Silo

Application: Concentrate slurry is dried under pressure and stored before being further processed into powder.

Challenges: Concentrate slurry, an intermediate product, is stored in silos where it tends to stick to the silo walls, often creating build-ups which are difficult to measure. This impedes the ​​​​​​​end-user's ability to manage and control inventory in order to assure continuous production upstream. The Rosemount 3D Solids Scanner delivers both accurate real-time volume measurement of the stored concentrate slurry and a 3D image of how the material is actually distributed inside the silo. This allows early detection of build ups in order to schedule timely maintenance and cleaning activities, to avoid unexpected interruptions of the process and associated losses in time and money.

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Talc Powder Storage

Application: The final fine talc powder is stored in silos until it is packed or shipped in bulk.

Challenges: Talc powder generates a great deal of dust during the filling and emptying processes, leading to harsh dusty conditions in the silo. The end-user needs to accurately measure the quantity of talc powder being stored in order to meet delivery schedules and to satisfy the plant' inventory reporting requirements that are fed into its ERP system. The Rosemount 3D Solids Scanner's unique dust-penetrating technology delivers accurate and reliable real-time measurements of the talc powder's volume, even under harsh conditions, giving end-user's improved inventory management and control capabilities.

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