The Limestone pelletizing process is typically operated with a water/solids binder mix as the binding agent. The binding agent is required to bond the dust particles and allow handling of the pellets until they are applied to the soil without degradation or breakdown. The purpose of this study is to give some direct comparisons of usage rates and physical properties for 11 binders used in a controlled test environment for 2 grades of limestone fines. Some of the common binders used in the production of limestone pellets are Lignosulfonates, Brewex, and Molasses. This study was performed using different types of these binders (plus blends which may be candidates for use). During the testing the binders were not identified by name or supplier and all results were tabulated before revealing the type and source of binder. Results of this study can be used to compare binder properties for selection of a binder to meet requirements of individual limestone pelletizing operations. Results also include properties of the finished pellets with respect to tested binders for pelletizing, drying, sizing, abrasiveness, hardness, and strength.
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