In this study, the calcined tincal produced in laboratory scale at ETI Mine Works General Management, Technology Development Department previously, in the light of the data obtained from the laboratory, micronize calsined tincal production has been madein industrial size. For this purpose, an industrial scale pilot plant has been established at The Directorate of Kirka Boron Works. In this plant, calcined tincal is obtained by single-stage in the rotary calcination furnace. This process is called as "single step calcination - autogenous grinding -separation method (CGS)". In the mentioned process, by applying heat treatment; products were manufactured with higher B2O3 grade, lower H2O content and lower impurities. Since its size is micron level, product was named "Micronize Calcined Tincal" and the production yield was about 90% on the basis of B2O3. The calcined tincal obtained by this method, is a new commercial product as well as an alternative input for the production of borax penta hydrate, was patented.