Recycling of Waste Magnesite Powders

Abstract

Each year in Turkey, thousands of tons of magnesite ore is subjected to heat treatment. For this operation, billion of tons of magnesite ore is produced and beneficiation. Crushing process which is occur an important department of beneficiation plants, are produce as very thin waste powder magnesite which is average %25 of feed raw ore. So far, the amount of this type of material, approximately 500,000 tons of waste is known to be stocked. This material is 80% smaller than 165 microns, and average grain size d50 is 79 microns. This stock is very difficult to fine-sized material harm to the environment is inevitable. The purpose of this study, produced in large quantities so thin, the waste powder material, is investigate the possibilities of recovery, at the same time the material is to prevent harm to the environment. In this study, high purity Mg(OH)2 production from fine waste magnesite powder was investigated. In experimental studies, the leaching method is used. The products obtained are repeated conditions. Chemical analysis is made to determine of the product compounds. According to the results of chemical analysis, the product compounds, Mg(OH)2:99.35%, SiO2:0.15%, CaO:0.50% is seen from obtained. These results show that high-purity Mg(OH)2 will be produced. In addition, the aimed to determine of the product characterization were made XRD analysis. According to XRD analysis results show that the product name is Brucite.