There are two primary types of expansion joints-metal and non-metallic or elastomeric. Metal expansion joints are constructed in a bellows configuration from thin-gauge material designed to absorb mechanical and thermal movement. Elastomeric expansion joints, by contrast, are fabricated from natural or synthetic rubber and fabric. Consisting of an inner elastomeric tube fused to a metal-reinforced fabric body and an elastomeric cover, these types of expansion joints accommodate greater pipe movement and provide more abrasion resistance than metal joints.
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The major achievements of the project include the construction of a 500,000-ton multi-metal complex industrial demonstration project that meets the nationally determined treatment capacity index; under the condition of a concentrate grade of more than 25%, the recoveries of copper, gold, and other major metals will reach 98.5%. the above. It was demonstrated that sodium-alkali desulfurization method was used to re-treat the acid-generating tail gas, and the emission concentration of sulfur dioxide was far lower than the national standard. At the same time, sodium sulfite, a by-product with a high added value, could also be produced.
Expansion joints reduce vibration, dampen sound, and accommodate movement in piping systems.
Shandong Dongying Fangyuan Nonferrous Metals Co., Ltd. undertook the “Eleventh Five-Year Plan†national science and technology support plan project—the development of multi-metal capture technology for oxygen blowing and helium production has achieved a number of important achievements. The company has developed a multi-metal integrated extraction equipment and process with international leading level, has filed 5 invention patents and 11 utility model patents, and has signed technology transfer agreements with 5 companies or reached cooperation intentions, and succeeded in foreign countries. Conversion implementation.