Method for preparing micro-nano TATB (triamino trinitrobenzene) explosive granules

The invention discloses a method for preparing micro-nano TATB (triamino trinitrobenzene) explosive granules. The method comprises the following steps of: (1) preparation of explosive solution, wherein the TATB explosive is dissolved to prepare the explosive solution without impurities; (2) preparation of non-solvent medium, wherein water and dispersant are uniformly mixed to prepare the non-solvent medium, and the non-solvent medium is cooled by putting in a refrigerator or adding ice cakes and other mode; (3) mixed crystallization, wherein the TATB explosive solution prepared in the step (1) and the non-solvent medium prepared in the step are mixed to crystallize to form micro-nano explosive granules, and the non-solvent medium in the mixing process is kept at a temperature of lower than 10 DEG C; and (4) post-treatment, wherein the micro-nano explosive granule liquid prepared in the step (3) are subjected to solid-liquid separation, washing purification and drying to obtain the micro-nano TATB explosive product. The method has the characteristics of simple process flow and convenience in operation, and is applicable to industrial large-scale production. By adopting the method, micro-nano TATB powder with average granular diameter of 170nm and d50 of 100nm can be obtained by controlling process parameters.