Metal welding-cutting gas and preparing method thereof

Abstract

The invention refers to a kind of gas for metal material welding cut and the confecting method. The technology program is: uses liquefied oil gas or liquefied propane as gas and adds in a kind of additives, the composition and the weight proportion of each additive are: cyclohexanone 61-86%, ethanediol methyl ether 13-39%, benzene hydrazine 0-1%. The batch formula of the additive is scientific and reasonable, the additive distributes in the liquid phase or the gas phase evenly, the welding quality reaches or excesses the acetylene gas. The energy consumption of the invention is low, the cost is low, it has no contamination to the environment, the cut surface is flat, the sludge oxide is little, and the slot is narrow.

Description

technical field [0001] The invention relates to a welding and cutting gas and a preparation method thereof, in particular to a metal welding and cutting gas and a preparation method thereof. Background technique [0002] The gas used for welding and cutting metal materials has always been traditional acetylene gas, which has high cost, high energy consumption, heavy pollution, and is prone to explosion accidents. During the welding and cutting process, the steel cutting nozzle that cuts continuously for about 5 meters will be heated and expanded and deformed. There is a lot of slag, and it is easy to explode, easy to temper, emit black smoke, contain phosphine, hydrogen sulfide poisonous gas, pollute the environment, and endanger human health. [0003] Aiming at the above-mentioned shortcomings of acetylene gas, many scientific research workers have researched and explored alternative fuels for acetylene gas. For example, Chinese patent application 03118061.2 discloses a we...

AI Technical Summary

Problems solved by technology

[0002] The gas used for welding and cutting metal materials has been using traditional acetylene gas, which has high cost, high energy consumption, heavy pollution, and prone to explosion accidents

During the welding and cutting process, the steel cutting nozzle that cuts continuously for about 5 meters will be heated and expanded and deformed. A lot of slag, easy to explode, easy to temper, emit black smoke, contain phosphine, hydrogen sulfide poisonous gas, pollute the environment, and endanger human health

[0003] Aiming at the above-mentioned shortcomings of acetylene gas, many scientific researchers have researched and explored alternative fuels for acetylene gas. For example, Chinese patent application 03118061.2 discloses a welding and cutting process that uses liquefied petroleum gas, liquefied propane, and liquefied propylene as fuels, and adds an additive to prepare welding and cutting materials. Gas method, the composition of the used additive of this patent application is the following weight ratio: ethylene glycol methyl ether 40-60% polyoxyethylene ether surfactant composition 5-15% fusel oil 15-25% dioxin Iron (1% methanol solution) 8-15% diphenylamine (1% methanol solution) 5-12%, the above additive formula failed to effectively increase the calorific value of the gas, the gas temperature only reached 2690 ° C, and polyoxyethylene ethers Surfactant composition and polymer compounds such as fusel oil are easy to deposit carbon at high temperature, which will block the pores and cause flameout

Due to the high price of liquefied propane and liquefied propylene, the economic feasibility of using them as fuel is poor