Primary study on microwave in-drum drying for simulated borate concentrate

Compared with borate concentrate cement solidification, microwave in-drum drying technology not only decreases greatly in volume, but also constrains radioactivity in a finite field. The study was designed therefore, including pre-test and pilot test. It comes out that it is feasible to dry the simulated borate concentrate by microwave in drum. During the microwave drying process, the outlet temperature can be an intuitionistic sign of subsequence feeding. In batched drying process, the first feed must be moderate to avoid microwave reflection; the less each subsequent feed is, the better the product's characters would be. Under the test condition, it is recommended that feed SBC or end drying when outlet temperature is in excess of 72 ℃; the first feed is recommended to be 2 kg SBC, and subsequent feeds can be l kg SBC each. (authors)