2026-06-11Views：
The industrial gas demand of foundry enterprises depends on what castings you produce and how large the scale is, but it can give you a rough reference range.
First, the most commonly used three gases
oxygen is mainly used in the smelting process. For example, the steelmaking process uses about 50 to 60 cubic meters of oxygen per ton of steel, and the electric arc furnace steelmaking is less, 10 to 25 cubic meters per ton of steel. If your factory does aluminum alloy smelting at the same time, it will also use blowing refining. The amount of gas is about 3‰ to 1% of the weight of aluminum liquid, and the purity of nitrogen is very high, generally more than 99.6, and the water must be removed.
Nitrogen is one of the largest amount of gas foundry, mainly when the protective gas, such as steel rolling, heat treatment, continuous casting, galvanized chrome plating these links are inseparable from it. Data show that a large steel pipe enterprise uses more than 20 million cubic meters of nitrogen alone in a year, of which 80% is used for direct reduction iron protection and more than 10 percent is used in the smelting process.
The amount of argon is relatively small, mainly blown into the molten steel, used to uniform composition, remove impurities, about 1 to 3 cubic meters per ton of steel.
And the compressed air demand
pneumatic tools, sand blowing, pneumatic control valves in the foundry all require compressed air. The gas discharged from the traditional oil-injected air compressor will pollute the castings with oil, so now more and more foundry enterprises are replacing water-lubricated oil-free air compressors. This kind of machine works with water to participate in compression to seal and cool down, and the gas discharged does not contain oil, which is especially suitable for casting scenes that require cleanliness. With the use of gas-water separator and dryer, there is basically no oil and water in the air pipe, and the surface quality of the casting is more guaranteed.
To sum up
if it is a small and medium-sized casting enterprise, the annual gas consumption is about tens of thousands to hundreds of thousands of cubic meters. Large-scale iron and steel casting joint enterprises, nitrogen alone may be tens of millions of cubic meters. The specific figures depend on your product type and production capacity. It is recommended to reverse the total amount according to the gas consumption per ton of casting, plus a margin of 20% to 30.
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