Blogs

Things to Know When Using High-Purity Acetylene

High-purity acetylene is a flammable gas with a colorless, aromatic odor. Acetylene produced from calcium carbide is toxic because it contains hydrogen sulfide (H₂S) and phosphine (PH₃), giving it a distinctive smell. Its melting point at 118.656 kPa is -80.8°C, and its boiling point is -84°C. Its relative density is 0.6208 (-82°C/4°C), and its refractive index is 1.00051 at 0°C and 1.0005 at 0°C. The flash point is -17.78°C, and the autoignition temperature is 305°C. In air, its explosive limits range from 2.3% to 72.3% by volume. It can undergo violent explosions when in liquid or solid states, or when in gaseous form under certain pressures.

2021.12.30

Things to Know When Using High-Purity Acetylene

Blogs

Safety Knowledge for the Use of High-Purity Acetylene

High-purity acetylene is primarily used in industry, especially for welding metals. At room temperature, it is a colorless and highly flammable gas. Pure acetylene is a colorless, odorless, highly flammable, and toxic gas. In liquid, solid, or gaseous states, under certain pressures, it poses a serious risk of violent explosion. Factors such as heat, vibration, and electric sparks can all trigger explosions.

2021.12.27

Safety Knowledge for the Use of High-Purity Acetylene

Blogs

Some Common Knowledge About High-Purity Acetylene

Producing high-purity acetylene from calcium carbide is an essential component and key feature of the calcium carbide-based polyvinyl chloride (PVC) production process. There are two main processes: wet acetylene production and dry acetylene production. In China, the majority of the domestic calcium carbide-based PVC industry employs the wet acetylene production process. The environmental challenges posed by the "three wastes"—including calcium carbide slag slurry and clean wastewater—generated during the calcium carbide-based PVC production process have long been a major obstacle to the development of the PVC industry. Addressing these "three wastes" in wet acetylene production not only represents a primary goal for energy conservation and emission reduction but also has become an inevitable necessity for the survival and development of calcium carbide-based chlor-alkali enterprises.

2021.12.07

Some Common Knowledge About High-Purity Acetylene

Industry News

Under the dual control of energy consumption, the price of raw material calcium carbide has soared.

Under the dual control of energy consumption, the price of raw material calcium carbide has soared.

2021.10.29

Under the dual control of energy consumption, the price of raw material calcium carbide has soared.

Industry News

The new national standard GB/T 11638-2020, "Acetylene Gas Cylinders," has come into effect as of July 1, 2021!

The new national standard GB/T 11638-2020, "Acetylene Gas Cylinders," has come into effect as of July 1, 2021!

2021.10.29

The new national standard GB/T 11638-2020, "Acetylene Gas Cylinders," has come into effect as of July 1, 2021!

Industry News

Prices of cryogenic liquids have risen sharply.

In 2017, prices of liquid gases (oxygen, nitrogen, and argon) all reached new highs not seen in recent years. At one point, prices changed daily, and in some cases, goods were available at quoted prices but simply couldn't be found. The main reasons behind this surge include the positive effects of supply-side reforms in the steel industry—such as capacity reductions, upgrades, and inventory destocking—which have led to increased steel prices and, consequently, higher production volumes at steel mills. As a result, the demand for oxygen, nitrogen, and argon used in ironmaking and steelmaking has risen sharply. Additionally, the crackdown on "strip steel" (produced using medium-frequency furnaces) has prompted many small steel mills to switch to electric arc furnaces or basic oxygen furnaces, both of which rely heavily on oxygen. Environmental policy considerations have also played a role, and a new wave of investment—in sectors such as photovoltaics, electronics, chemicals (including coal-to-chemicals), and stainless steel/specialty steels—has significantly boosted demand for these gases. 2

2021.08.25

Prices of cryogenic liquids have risen sharply.
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