Dos Santos International is pleased to announce the award of a contract to provide a DSI Sandwich Belt high angle conveyor to SNF Coagulants for their new plant in St Avold France.  SNF sought out this reliable solution to elevate magnetite to two tanks.    

In addition to the Sandwich Belt conveyor, DSI will also supply a bifurcated chute with flop gate at the head end, and a hopper at the tail. The conveyor will function as a self-feeder in this application, allowing the hopper to be emptied, and the material to be elevated vertically with no transfers.

DSI Sandwich Belt high angle conveyors take on many forms and offer many advantages.  Each DSI Sandwich conveyor uses two standard, smooth-surfaced conveyor belts, face-to-face, to gently but firmly contain the product being carried.  This not only makes steep angles possible; it also offers a spillage free, environmentally sound operation because the material remains secured between the belts.

The DSI Sandwich Conveyor will elevate 122 t/h of natural gypsum at an 85 degree angle.

A DSI Sandwich Belt conveyor is capable of higher conveying speeds and greater capacities than other high angle conveying methods.  With the availability of wider belts and accompanying hardware, capacities greater than 10,000 t/h can be easily achieved with a DSI Sandwich conveyor.  High angles of 90° are typical, and lifts of 300m are easily accomplished.  

The use of all conventional conveyor parts ensures high availability and low maintenance costs, as well as interchangeability of components and fast delivery of replacement parts.


SNF is a privately-held, specialty chemical company based in the Rhone-Alpes region of France, with a long-standing presence on every continent.  With 21 production sites in Europe, Asia, Australia, and America, with a production capacity of 1,235,000 tonnes, SNF has the largest polyacrylamide production capacity in the world.

As a leader in manufacturing and processing water-soluble polymers (based on polyacrylamide), SNF has developed a range of more than 1,000 products that help preserve our natural resources, encourage recycling, and improve efficiencies of industrial processes.  Our polymers are used in all markets where water is present:  drinking water production, wastewater treatment, sludge dewatering, oil and gas extraction, mining, agriculture, and the manufacture of paper, textiles, and cosmetic formulations.

SNF products are sold into 130 countries, across every sector of the economy, with 51 subsidiaries located in more than 40 countries, in 3 major economic regions (The Americas, Europe, and Asia).

With a long-term strategy focused on innovation and investment, SNF maintains a high level of R&D expenditure along with continual investment in improving and expanding its production sites.  As a result, SNF now accounts for almost half of all global polyacrylamide production, which underscores the effectiveness of this innovation and investment policy.