On September 18th, three projects including the energy-saving technological transformation of the tail gas of the 30,000-kilovolt closed type calcium carbide furnace of Xinjiang Tianye (Group) Co., Ltd. passed the acceptance check. The project belongs to the national "Eleventh Five-Year" period of resource conservation and environmental protection project. The project team tackles the problem of low efficiency of comprehensive utilization of closed-end calcium carbide furnace exhaust gas in China, adopts the latest domestic dry dust removal supporting wet purification process technology, implements technical transformation of the original Aiken dry dedusting device, and achieves deep purification of tail gas. The dedusting treatment was performed to meet the standards of chemical fuel gas, and sent to Tianye Power Plant, chemical plant, and lime kiln as fuel gas to replace coal and natural gas. The comprehensive utilization of calcium carbide tail gas was realized. After the project is implemented, 150 million cubic meters of exhaust gas can be purified annually, saving 17,400 tons of standard coal, and the economic and environmental benefits are significant.
Iron-based alloy powder is commonly used in plasma transfer arc welding (PTAW) due to its excellent mechanical properties and high resistance to corrosion and heat. This type of powder is typically composed of iron as the base metal, along with various alloying elements such as nickel, chromium, molybdenum, and tungsten.
The specific composition of the iron-based alloy powder may vary depending on the desired properties and application requirements. For example, adding nickel can increase the strength and toughness of the weld, while chromium enhances the corrosion resistance. Molybdenum and tungsten are often added to improve the high-temperature strength and creep resistance of the weld.
Iron-based alloy powders for PTAW are available in various particle sizes, typically ranging from a few micrometers to several hundred micrometers. The powder is usually fed into the plasma arc through a powder feeder, which ensures a controlled and consistent supply of powder during the welding process.
During PTAW, the powder is melted and deposited onto the workpiece, forming a weld bead. The high energy plasma arc provides the heat necessary to melt the powder and the base metal, creating a strong and durable weld joint.
Overall, iron-based alloy powder for plasma transfer arc welding offers excellent weldability, high mechanical properties, and resistance to corrosion and heat, making it suitable for a wide range of applications in industries such as aerospace, automotive, and power generation.
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