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With the maturation and improvement of flame cutting technology in recent years, the range of cutting fuels for portable CNC cutting machines has become more and more extensive. In addition to conventional fuels such as propane oxygen and acetylene oxygen, such as gasoline, liquefied petroleum gas, natural gas, etc. Regulatory fuels have gradually become the choice of many companies and users. So what are the characteristics of such unconventional flame-cut fuels and what are the areas that need attention in the cutting process? Wuhan Huayu Cheng CNC will answer you one by one.
Natural gas Natural gas is a multi-component gas mixture. The main component is alkanes, in which the majority is methane, with a small amount of ethane, propane and butane, and it also contains hydrogen sulfide, carbon dioxide, nitrogen and water vapor. And traces of inert gases such as helium and argon. Under standard conditions, methane to butane are present in a gaseous state, and pentane and above are liquids.
Due to the low calorific value of natural gas, slow combustion speed, low flame temperature, corresponding increase in cutting warm-up time, large consumption of gas and oxygen, and high overall cost. When cutting thick steel plates, the required total calorie gas consumption is large. To maintain the cutting speed, the thick components require high heat output from the outer flame, widening of the slits, large heat-affected zone, easy pulping or hard penetration during preheating, and impact on the metal surface. It is necessary to add additives to improve the cutting speed. Flame temperature.
Liquefied petroleum gas Liquefied petroleum gas comes from refinery gas, wet natural gas, or oil field associated gas. The main components of liquefied petroleum gas derived from natural gas and associated gas are propane (commonly known as the main component of raffinate), butane, butene, and small amounts of pentane. The composition of liquefied gas is complex, the flame is not concentrated when burning, the heat is not balanced, the flame temperature is low, the cutting warm-up time is correspondingly increased, the cutting speed is reduced, and the efficiency is poor.
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