Over the years there have been three different processes used to Crush (re-process) Submerged Arc Welding (S.A.W.) Flux Slag;
- Hammer Mills
- Rotary Cage Mill Pulverizer
- Fused S.A.W. Flux / Slag Crushing Unit
Typical Applications; Alum cake, Animal tankage, Barley shorts, Bran, Coal, Cocoa shells, Dried milk, Fish scrap, Gelatine, Gypsum, Limestone, Meat scraps, Oats, Salt cake, Shelled corn, Soya bean expeller cake, Steam bone.
Hammer mills were the most popular means of crushing SAW slag, however with today’s technology the hammer mill is no longer being used in the United States or Canada.
Rotary Cage Mill Pulverizer
Typical Applications; Range from Asbestos Ore, to Zinc Skimmings. Typically they are mostly used in the fertilizer industry.
Rotary cage mill pulverizers have come into favor do to their being readily available and ease of use. However do to their intended purpose of “pulverizing”, or turning the slag into powder (flour) the addition of new (virgin) flux is almost always required, this addition of new can be as high as 50%.
Fused S.A.W. Flux / Slag Crushing Unit
Typical Applications; Submerged Arc Welding Flux Slag Crushing (only).
Pros & Cons
|Hammer Mills||Cage Mills||Slag Crushing Unit|
|Readily Available||Readily Available||Custom Built|
|No Granular Size Control||No Granular Size Control||Granular Size Control|
|Low Production Output||Low Production Output||High Production Output|
|No Product Inspection Points||No Product Inspection Points||Product Inspection Points|
|Multiple Uses||Multiple Uses||One Use|
|Easily Trained Operators||Easily Trained Operators||Skilled Operators Required|
The S.A.W. Flux slag Crushing equipment used at Harbert’s Products, Inc. was designed by A. Beck Enterprises.
The Fused S.A.W. Flux / Slag Crushing Units being used at Harbert’s has a waste stream of 4% to 10% (7% average), this difference is due to the type and size of the crushed flux.