Rubber lining surface preparation

Rubber lining is the skilled application of unvulcanized rubber sheets to prepared metal surfaces. The lined equipment is then vulcanized in a steam autoclave, fully bonding the rubber to the metal surface creating a durable and resilient protective rubber coating. 

Several methods are in practice for preparing the metal surfaces before rubber lining such as follows ... 

Thickener, single compartment, concrete with 3 m walls, overflow weir, launder excluding central rake, excavation, site preparation, piping feed launder, overflow pump. PM cost = 400000 for a surface area = 100 m with n = 0.38 for the range 80-2000. L-i-M = 3.1. L/M = 0.4. Alloy cost factors c/s X 0.7, concrete X 1.0 rubber lined for acid-leach mineral processing X 1.22. 

While this book was in its final preparation stage, two additional types of adhered sheet linings for chemical exposures have come to our attention. One is a sheet with, as the exposed face, a Tedlar(sf film adhered to a layer of rubber-asphalt blend. The sheet is applied with rollers to a substrate surface that has been coated with an adhesive primer. Sheet edges are butted with an adhesive lap strip of Tedlar applied over the joint to protect it. This is a proprietary product presently available from only one source, which will supply particulars of the application procedure and chemical resistance tables upon request. 

Sheet membrane linings are usually shipped in rolls. Exceptions include plasticized-unplasticized vinyl laminates, specially compounded asphalt and asphalt and rubber compounded sheets, usually shipped flat in cartons or boxes. These are applied to properly prepared surfaces with an adhesive that may be air-cured or heat-cured. At all events, so far as storage is concerned, temperatures above freezing and under 100°F are usually not matters of concern, unless the manufacturer or applicator so advises. Water and dirt, however, damage these materials so they should be stored in a clean storage area, off the ground and under cover. 

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