Latest News

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  Low cost and stable fluoride removal / fluoride removal intelligent dosing control system2020/09/16

  Changlong began to set up a team to engage in research on fluoride removal technology in the second half of 2017. The research and development team of stable and up-to-standard fluoride removal technology consists of 3 post-doctors, 4 masters and dozens of technical engineers. Aiming at the goal of ......

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  Method for removing hexavalent chromium in cement by ferrous sulfate2020/09/10

  With the promulgation and implementation of the regulations on the limit and measurement method of water-depth chromium in cement in 2016, the standard requirements for the content of water-soluble chromium in cement have been strictly limited, which has greatly increased the quality control require......