Industrial fuel gas for metal welding and cutting in high efficiency and low consumption

Abstract

The industrial fuel gas for welding and cutting metal in high efficiency and low consumption consists of basic fuel gas with dimethyl ether as main component in 98-99.99 wt% and synergistic additive in 0.01-2 wt%. The synergistic additive is mixture of castor oil 10-15 wt%, methanol 10-20 wt%, octanol 10-20 wt%, sodium alkyl sulfonate 4-5 wt%, and 150# solvent oil 56-65 wt%. The industrial fuel gas is safe, clean and environment friendly, and has low consumption, raised flame temperature, high burning efficiency and other advantages.

Description

technical field [0001] The invention relates to a metal cutting and welding gas, in particular to an industrial gas for metal welding and cutting which is added with additives with energy-saving and synergistic effects in the base gas mainly composed of dimethyl ether. Background technique [0002] The processing of metal materials is an indispensable technical means for the development of modern society and economy and modern life. Acetylene is widely used as a gas for welding and cutting in metal processing because it has a higher combustion temperature, is more convenient to obtain, and has a better use effect. [0003] The production of acetylene from calcium carbide is a widely known technology in the early stage of coal chemical industry development nearly a hundred years ago. In 1903, the French scientist Pilcard first applied oxygen-acetylene gas to metal welding and cutting. It has a history of more than 100 years, and it has left indelible achievements in the hist...

AI Technical Summary

Problems solved by technology

However, after use, dissolved acetylene gas has exposed more and more drawbacks and defects, such as high energy consumption, large resource consumption, and serious pollution.

For example, the production of 1 ton of acetylene gas requires 10,000-12,000 degrees of electricity, about 3 tons of limestone, about 1.6 tons of standard coke and carbon rods, etc., and a total of 3-5 tons of exhaust gas and waste residue; filling a bottle only 2 kg to dissolve Acetylene gas takes several hours, and the total gross weight of each ton of acetylene gas packaging cylinders reaches more than 24 tons, which is very inconvenient to transport and store

[0004] In the past ten years, liquefied petroleum gas (LPG) or modified liquefied petroleum gas has been introduced successively at home and abroad to replace dissolved acetylene gas for metal cutting and welding gas, but their welding performance is far from satisfactory. Compared with dissolved acetylene gas, there is still a significant gap in welding quality and cutting speed

[0005] After searching, in the patent documents in recent years, there have been technical patents on metal welding and cutting industrial gas based on dimethyl ether, such as the patent application whose publication number is CN 1468942A and application number is 200510020442.3. Although this type of industrial gas There are many advantages, such as the performance and quality of metal cutting are very good, but there are still problems in metal welding, especially the welding of ferrous metal steel with high melting point. Compared with dissolved acetylene, there is still a gap in welding quality

[0006] Obviously, the currently known industrial gases for welding and cutting of various metals mentioned above are still difficult to fully replace dissolved acetylene.