Removal of Major Impurties (Ca-Mg) of Brine with Chemical Treatment Process in the Salt Sector
Year: 2018
Type: article
Abstract: The operation of salt minerals dates back hundreds ofyears. Salt is produced from salt rich sources through salts today. The salt(brine) obtained from existing salt sources is not in the desired purity. Forthis purpose, purification of the brine should be carried out to removeunwanted impurities. Brine (raw salt) also contains impurities that are solubleand insoluble except NaCl. 94-96% of the brine obtained from the salt lakecontains NaCl. The remaining 4-6% are MgCl2, MgSO4, CaCl2 and other traceamounts. All of these substances are called solubility and insolubleimpurities. These impurities are magnesium, calcium and sulfate .Calciumaccumulation causes crust formation in the circulation line, especially heatexchangers. For this reason, heat transfer and circulation effiency decrease.The impurities from the dissolved raw salt (Ca+2, Mg +2 etc.) should be removedby the purification process. Settling tests were carried out in brinepurification system. As the experimental results obtained, the magnesium andcalcium from the major impurities in the brine were separately and coherentlyremoved. NaOH was used to precipitate the magnesium and the dynamic run-out wasdetermined to be optimum pH = 11. Na2CO3 was used to precipitate the calcium fromthe other major impurities in the brine. As a result of dynamic experiments,optimum precipitation pH was set at 9,5.
Author: İsmail Bayram
Institution: Ahi Evran University
Language: English
Subfield: Water Science and Technology
Field: Environmental Science
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W2948374875