Reduce traffic noise, the construction depth helps to absorb sound waves, and the noise reduction ability can reach more than 30%.
Reflective Glass beads Technical Data
①Size: 90-1180um (According to requirements)
②Roundness: >80% (According to requirements)
③Refractive index: >1.5
④Proportion: approx. 2.5
1 The melting cost is only 2/3 of that of aluminum
2 Die casting production efficiency is 25% higher than aluminum, metal mold casting is 300-500K higher than aluminum, and lost foam casting is 200% higher than aluminum
3 The surface quality and appearance of magnesium castings are obviously better than aluminum (because the thermal load of the mold is reduced, the inspection frequency can be reduced)
At present, there are two main preparation methods for industrial metallic calcium at home and abroad: electrolysis and thermal reduction. The focus is on the process, equipment and progress of vacuum distillation for preparing high-purity metallic calcium. Electrolysis and thermal reduction are chemical purification methods that are difficult to Prepare high purity metal calcium. Using industrial calcium as raw material, vacuum distillation can be used to prepare high purity metal calcium with a purity of more than 99.999% (5N).
In our country, calcium appeared in the form of metal, which dates back to one of the key projects aided by the Soviet Union to our country before 1958, a military industrial enterprise in Baotou. Including the liquid cathode method (electrolysis) metal calcium production line. In 1961, a small-scale trial produced qualified metal calcium.
The lead-acid battery industry in my country has a history of more than a hundred years. Due to the characteristics of cheap materials, simple technology, mature technology, low self-discharge, and maintenance-free requirements, it will still dominate the market in the next few decades.
