According to the investigation, the direct cause of the accident is: the short circuit of some electrical lines in the main workshop of Baoyuanfeng Company ignited the surrounding combustible materials, and the high temperature generated by combustion led to the physical explosion of ammonia synthesis equipment and ammonia pipeline. The management reasons are: Baoyuanfeng Company's main responsibility for safety production is not implemented, the local fire department's safety supervision and management is weak, the construction department's supervision in engineering construction is lacking, the comprehensive supervision of the safety supervision department is not in place, and the local government's responsibility for safety production supervision is not effectively implemented.
The causes of death from injury include burns and ammonia poisoning. The main cause of death is respiratory edema caused by ammonia poisoning.
Mild ammonia inhalation poisoning is characterized by rhinitis, pharyngitis, tracheitis and bronchitis. Severe inhalation poisoning can cause laryngeal edema, glottic stenosis and respiratory mucosa shedding, which can cause tracheal obstruction and asphyxia. Inhalation of high concentration can directly affect pulmonary capillary permeability and cause pulmonary edema.