METHOD OF PRODUCING CALCINED TINCAL BY CALCINATION USING AUTOGENIC CRUSHING AND SEPARATION IN ONE STEP

摘要

FIELD: process engineering.;SUBSTANCE: invention relates to production of fine calcined tincal with high content of primary substance. Method of producing tincal containing 45-62% of B₂O₃ with maximum moisture content of 0.60%, particle size of 250 mcm and bulk density of 0.15-0.3 g/cm³, and chemical formula Na₂B₄O₇·(1-5)H₂O, comprises the following stages: calcination of coarse tincal ore in rotary furnace with scrapers for thermal treatment, fine grinding of calcined tincal with help of autogenic grinding in rotary furnace, pneumatic separation by hot air required in calcination for clay separation. High-density compacted calcined tincal is produced at second stage by compacting low-density calcined fine tincal.;EFFECT: new compacted, calcined tincal with particle size of 6 mm, bulk density of 0,75-1,0 g/cm³ and chemical properties of fine calcined tincal.;21 cl, 2 dwg, 1 tbl