The invention discloses a normal temperature preparation method of ultra-micro insecticide
powder. The preparation method comprises the following steps: 1, weighing decoction pieces of Pructus Carotae,
Areca catechu, Fructus Ulmi Macrocarpae Preparatus, Omphalia, Rhizoma
Dryopteris Crassirhizomae, dry ginger, processed
Radix Aconiti Lateralis Preparata, Dark Plum Fruit,
Rheum officinale,
Stemona sessilifolia and Common Vladimiria Root and raw materials of
Quisqualis indica,
Medicine Terminalia Fruit and Chinese
torreya according to certain proportions,
drying above materials, and crushing thematerials into coarse powders; 2, extracting oil from
Quisqualis indica,
Medicine Terminalia Fruit and Chinese
torreya; 3, mixing other coarse powders and medicinal residue, crushing the obtained mixture in a rod mill, sieving by a 500 mesh
sieve through allowing the obtained crushed mixture to enter a special bidirectional
airflow sieving
machine through air blowing, conveying the
powder which goes through the
sieve through the
airflow generated by a draught fan to a
cyclone collecting
machine, and collecting to obtain ultra-micro insecticide
powder; 4, collecting the powder which does not go through the 500 mesh
sieve by a funnel, and carrying out cycle crushing by conveying the collected powder to the rod mill through a pipeline; and 5, fully and uniformly mixing the ultra-micro insecticide powder obtained in step 3 with
Quisqualis indica oil,
Medicine Terminalia Fruit oil and Chinese
torreya oil to obtain the finished ultra-micro insecticide powder. The preparation method has the following advantages: the whole preparation process is carried out at normal temperature, and the bidirectional
airflow sieving
machine used in the invention simplifies the preparation method of the ultra-micro insecticide powder.