Industrial welding and cutting gas modified additive as well as preparation method and application thereof

Abstract

The invention provides an industrial welding and cutting gas modification additive. The industrial welding and cutting gas modification additive comprises the following components in parts by weight: 20-40 parts of a solvent, 10-30 parts of a polymerization inhibitor, 40-60 parts of a smoke suppressor, 0.5-4 parts of a catalyst, 0.1-1.5 parts of a stabilizer and 31-75 parts of an oxygen generating agent. According to the application of the industrial welding and cutting fuel gas modified additive, the modified additive is added into industrial fuel gas with C3 and C4 as mother liquor according to the ratio of 2-3 wt% for use. The modified additive disclosed by the invention is added into industrial fuel gases such as propane and liquefied gas, so that the gasification and activation performance of mother liquor fuel gas is improved, the wavelength and the frequency of combustion of mother liquor in oxygen are changed, and the combustion performance is improved; the flame combustion temperature of the industrial fuel gas added with the modified additive can reach about 3410 DEG C, the industrial fuel gas is superior to acetylene in the aspects of temperature, heat value, cutting effect, environmental protection, energy conservation, safety cost and the like, the cutting and welding performance of the industrial fuel gas reaches or exceeds that of acetylene gas, and the industrial fuel gas can completely replace acetylene to complete cutting and welding of metal.

Description

technical field [0001] The invention relates to the field of welding technology, in particular to an industrial welding and cutting gas modification additive and its preparation method and application. Background technique [0002] Among the industrial gas consumption in my country, the consumption of acetylene gas is the largest, reaching more than 70%. Oxyacetylene welding is the most commonly used welding and cutting method. The combustion temperature of acetylene in oxygen is high, and its combustion temperature can reach 3100°C, so the cutting speed of acetylene gas is obviously higher than that of pure natural gas, pure propane and liquefied petroleum gas. However, due to the active chemical properties of acetylene, it is flammable and explosive, and has a high risk factor. In particular, when acetylene is mixed with metals such as copper and silver, as well as air and pure oxygen, it will cause an explosion even when the diameter of the container is large. Moreover,...

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Problems solved by technology

The combustion temperature of liquefied petroleum gas, propane gas and other fuels in oxygen is 2000 ℃ ~ 2520 ℃, the flame temperature is low, and the preheating time is slow, especially the drilling preheating time is about 1.5 to 2 times that of acetylene, so it is not ideal to directly use it as a cutting gas , can only be partially cut and cannot be used for welding

In order to improve the welding and cutting performance of liquefied petroleum gas, people began to add some combustion accelerants to liquefied petroleum gas or propane gas to increase its flame temperature. The C3 and C4 industrial gases currently used in China are prepared by adding additives to propane or liquefied petroleum gas. When C3 and C4 industrial gases are mixed with oxygen, the flame temperature is 2850 ° C ~ 2960 ° C, which is between acetylene (3100 ° C) and propane (2520 ° C), and the cutting performance is improved, but it is still not as good as acetylene gas. cutting effect

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