Natural gas for cutting metals

Abstract

The invention discloses a natural gas used for cutting metals; it comprises natural gas with a purity higher than 95% by weight, and a liquid-phase synergistic additive accounting for 0.3-0.5% by weight of the aforementioned natural gas; the liquid-phase synergistic additive includes the following raw materials : 200# solvent oil, acetylene, petroleum ether, ethylene glycol monoethyl ether, turpentine, tung oil, isooctyl nitrate, dimethyl carbonate, tert-butyl ferrocene or ferrocene, methyl tert-butyl ether or n- Octyl ferrocene, p-tert-butyl catechol, azobisisobutyronitrile, polyether; the natural gas used for cutting metal can obviously increase the combustion temperature and combustion efficiency by adding a small amount of liquid-phase synergistic additives to the natural gas; At the same time, the liquid-phase synergistic additive of the present invention has little corrosion to the container and good volatility.

Description

technical field [0001] The invention relates to a natural gas for cutting metal; the gas can be used for metal cutting and welding. Background technique [0002] Among the industrial gas consumption in my country, 70% are propane gas and acetylene gas. When using pure acetylene gas to cut metal on carbon steel, it is easy to cause the upper edge of the cut to melt, hang slag and it is not easy to clean, and the cut surface is partially hardened, which makes the metal cutting process unsatisfactory, and the use of pure acetylene will cause great harm to the environment. Pollution, not environmental protection. During welding, grinding is required, which increases the production cost. Shipyards in coastal areas have banned the use of acetylene on shipbuilding platforms in recent years and switched to other new types of metal cutting gas. For many years, people have tried to use other fuels instead of acetylene as cutting metal gas, but due to other fuels such as natural gas,...

AI Technical Summary

Problems solved by technology

Shipyards in coastal areas have banned the use of acetylene on shipbuilding platforms in recent years and switched to other new types of metal cutting gas. For many years, people have tried to use other fuels instead of acetylene as cutting metal gas, but due to other fuels such as natural gas, liquefied petroleum gas, and propane gas , propylene gas, artificial gas, dimethyl ether and other fuels have a combustion temperature lower than 2500°C in oxygen and the metal cutting speed is slow. It is not ideal to directly use it as a cutting metal gas, and it is necessary to add combustion-supporting additives to catalyze, crack, and support the combustion of the base gas. , Change the combustion method of gas, thereby increasing the flame temperature, so that the flame temperature of burning in oxygen reaches or exceeds 3100 °C of acetylene, and realizes the purpose of replacing acetylene; but the existing combustion-supporting additives will cause exhaust gas pollution to the air, and after adding The calorific value of various fuels is still not enough to be used as gas cutting metal