To answer this question, we must first understand what an explosion is? And what is metal foam?
1. Explosives are mainly divided into physical and chemical explosives
- The principle of physical explosion:
Physical explosion is caused by physical changes (such as temperature, volume, pressure, etc.), and the properties and chemical composition of the explosive substances do not change before and after the explosion.
Material explosion energy mainly comes from shrinkage energy, phase transition energy, kinetic energy, flow energy, thermal energy, electrical energy, etc.
Overpressure explosion of gas non-chemical process, explosion of liquid gasification, explosion of liquefied gas and superheated liquid, heat of dissolution, heat of dilution, heat of adsorption, explosion caused by external heating, explosion caused by flowing fluid, explosion caused by overcurrent, explosion caused by discharge area Air explosions all belong to the category of physical explosions.
- Principles of chemical explosion:
Chemical effects arise from chemical reactions.
Whether it is a mixture of combustibles and air, or an explosive (such as dynamite), the substance of chemical explosion is a relatively unstable system, which will undergo a violent exothermic reaction under the action of a certain external energy. , produce high temperature and high pressure, and produce a strong destructive effect.
- The following five conditions must be met:
A. Combustible substances that provide energy, that is, explosives;
B. Combustion accelerants (oxidants), such as oxygen, air;
The combustible substance and the accelerant are mixed evenly;
D. The mixture is placed in a relatively closed space (surrounded);
Light up an ample energy supply.
2. What is metal foam?
Metal foam is a kind of porous metal with a porosity of more than 90% and a certain strength and hardness. This product is a metal material containing pore foam, the porosity is higher than that of ordinary sintered porous metal, and the pore size can reach 7 mm.
Metal foam is a two-phase composite material composed of pore dispersed phase and metal matrix skeleton continuous phase and phase, and its properties depend on the influence of metal matrix, porosity, pore structure and preparation process.
3. Metal foam is used in explosion-proof flame retardant
Metal foam has good fluid permeability and good fire resistance. It can be placed in pipelines carrying flammable gases or liquids to stop the explosion by absorbing heat to stop the spread of flames.
This product is suitable for acetylene, oxygen flame gas welding and gas cutting technology, mining motors and power switches, oil refining and combustible gas pipelines, burner systems, oil and gas recovery systems, heating furnaces, gas purification systems, etc. It can also be used as a fire-proof and explosion-proof filler for storage tanks such as liquefied gas and fuel.
Post time:
Apr-08-2022
