Preparation method of fire extinguishing agent for extinguishing spontaneous combustion of uranium metal

Abstract

The invention provides a preparation method of a fire extinguishing agent for extinguishing spontaneous combustion of uranium metal, comprising the following steps: respectively placing sodium chloride, potassium chloride and barium chloride into an oven and drying at 120 DEG C for 3 hours; weighing three components including the sodium chloride, the potassium chloride and the barium chloride according to the mass percentage of 20%, 25% and 55% after the drying step; mixing, grinding and agitating; placing a mixture of the last step into a crucible and placing the crucible into a muffling furnace; calcining at a temperature of 650 DEG C for 4 hours; after cooling in the muffling furnace, taking out a calcined crystal and crushing the crystal to obtain powder; and adding magnesium stearate into the crushed powder to prepare the fire extinguishing agent. When the uranium metal combusts spontaneously, a charged fire extinguisher sprays the surface of the uranium metal; when fire extinguishing agent powder is contacted with the combusted uranium surface, the powder is smelted when a low common smelting point is achieved under a high-temperature effect to form a more dense glass-shaped covering layer; and the combusted uranium metal surface is separated from the air on the periphery, so as to rapidly extinguish the fire.

Description

technical field [0001] The invention belongs to a method for preparing a fire extinguishing agent, in particular to a method for preparing a fire extinguishing agent for extinguishing spontaneous combustion of uranium metal. Background technique [0002] During the processing and material handling of uranium metal, finely divided uranium metal scraps such as slag, powder and peeled off scale are easily produced. Metal uranium is easily oxidized, and powdery metal uranium has a large specific surface area, so it is easy to spontaneously ignite when in contact with air. In the prior art, except waiting for the burning uranium fire to go out naturally, there is no effective measure to extinguish the uranium fire. Due to the frequent spontaneous combustion of uranium chips, and when the uranium chips are burned, a large amount of aerosol and relatively high heat are generated, which greatly endanger the health of the staff and the safety of the working environment. If the urani...

AI Technical Summary

Problems solved by technology

Due to the frequent spontaneous combustion of uranium chips, and when the uranium chips are burned, a large amount of aerosol and relatively high heat are generated, which greatly endanger the health of the staff and the safety of the working environment. If the uranium fire is not extinguished in time, the fire may spread spread, resulting in large losses

[0003] The spontaneous combustion of metal uranium belongs to metal fires. At present, there is no production of fire extinguishing agent dedicated to extinguishing uranium fires at home and abroad, and there is no systematic and complete method for extinguishing spontaneous combustion of uranium. The existing research results in this technical field provide possible fire extinguishing agent formulas , but did not address a feasible preparation method