Mineral Scaling ....


The most common forms of mineral scaling in geothermal developments are silica scaling and calcite scaling. 

Calcite scaling commonly occurs in production wells, normally at the point of first flashing within the well. With a chemical analysis of the fluids in the well, we can calculate the likelihood of calcite scaling.  We can advise on methods for treating calcite scaling and we offer a service to test for correct antiscalant dosing rates.  

Silica scaling can occur when the temperature of brine is dropped and the silica concentration becomes greater than the solubility.  In these cases, amorphous silica is precipitated, normally as a low density scale.   Silica scaling can be treated or avoided in a number of different ways.  We offer a full consulting service for advice and experimental verification of silica scaling.

Trace metal scaling can also become a problem - particularly in heat exchangers in binary plants.  We have extensive experience with these problems, particularly antimony sulfide scaling, in New Zealand.  We can calculate the likelihood of this type of scaling and offer remedies.