Fine Coal Filtration
Peterson "Coal Type" vacuum disc filters are used for de-watering two products from coal preparation operations, fine "clean coal" and "refuse". The size consist of these products is generally in the range of 28 mesh X 0. Some Peterson Filters are used on "raw coal" applications where the filter slurry contains a large portion of coal fines nearer the 28 mesh size. However, most current day clean coal filter applications are found in "flotation" circuits. In these applications there is usually a very large portion of the solids in the feed slurry that are in the -325 mesh X 0 range.
Flocculation of the fine coal filter feed slurry is a often required to obtain acceptable filtration rates together with low cake moisture. Since proper flocculent conditioning of the fine coal slurry and economical flocculent rates are essential, Peterson Filters has developed a highly efficient flocculator which can be used to condition thickener feed slurries as well as filter feed slurries.
"Refuse" slurries are characterized by high ash content and therefore lower filter rates and higher cake moisture. In these applications proper flocculent conditioning of the filter feed slurry is absolutely essential to obtain acceptable filter operation.
The continued success of our products in fine coal applications is attributable to Petersonís long business experience in this industry and our forward looking approach to improving the performance of our products.