Study on inhibition of explosion of titanium powder by mesoporous calcium compound/carbonized chelating resin composite powder

In order to effectively inhibit the explosion of titanium powder, new mesoporous calcium compound/carbonized chelating resin composite powder was prepared in this paper using macroporous chelating resin as the substrate. The inhibition effect of mesoporous composite powder on the explosion pressure evolution and explosion flame spread of titanium powder was tested using Dust explosion test system and Hartmann experimental system, respectively. The experimental results show that when the addition ratio of mesoporous composite powder reaches 80%, the maximum pressure of titanium powder explosion is reduced to 0.259 MPa, and the explosion flame spread distance is reduced to 194.12 mm, which has an obvious inhibiting effect on titanium powder explosion. The results show that: mesoporous composite powder in a high-temperature environment, heat decomposition to generate a large number of calcium compounds, calcium compounds undergo chemical reactions consume a large number of radicals required for explosion reactions; while generating a large number of solid and gaseous substances, the formation of a dense carbon layer covering the surface of titanium powder to play a good barrier effect, and dilute the concentration of oxygen, further limiting the explosion reaction, with a good physical-chemical synergistic inhibition effect, to achieve a good effect of inhibiting the explosion of titanium powder. This study can make a contribution to the development of new explosion suppressing powder and the prevention and control of combustion and explosion accidents during industrial production; ultimately, it can realize the safe and orderly smooth production of enterprises involving combustible dust and gas. [Display omitted] •Preparation and application of novel mesoporous composite powders.•Study on explosion pressure and explosion index of different concentrations of titanium powder.•Study on the inhibition effect and inhibition mechanism of mesoporous composite powder on titanium powder explosion.