Color coating production, mainly from the production of waste water pipeline section and coil Coil surface preparation. Its governance flow chart: chromium-containing wastewater (including wash water) → reduction treatment serum neutralization treatment → → → sedimentation skimmed wastewater discharge (including wash water) → → buried waste water separator 42, color coated production process containing Cr6 + wastewater treatment program? Wastewater containing Cr6 +, while its reduction treatment, reducing the amount of which is calculated Cr6 + content (g / m3) = Cr6 + titration points × 0.1733g / m3 reducing the amount (kg) = Cr6 + content × × bath volume ratio coefficient which is the ratio coefficient: 3.7 sulfite; sodium bisulfite 3; ferrous sulfate 8.8 Incorporation: derived by calculating the amount of reducing agent, appropriate to add some more. 43, color coated production skim wastewater treatment options? Skimmed wastewater must be oil-water separation, and its methods are: ① acidification method: using hydrochloric acid or sulfuric acid as a separating agent, the pH was adjusted to 2.0 caitu mechanical properties from a structural point of rock wool composite panels, although surface using color plates as support frame, made with wool padding, which are bonded together by glue and has a carrying capacity, but its flexural strength than the color steel polystyrene sandwich composite panels face much worse, when used as a roof, you must installation of large steel beams above to supplement its strength, however Binzhou Color volume, exceeding 2000mm or very easy bending deformation. Hollow Sandwich Glass magnesium composite board in the middle of the plate due to sandwich its plate glass magnesium body and keel are connected together, with the overall structure of high ancient, itself has a price higher strength Color volumes, and talking steel compound, which has a good overall more bending, impact resistance, can be done relatively long length. However, due to the weight of large, generally should not exceed the length of 4m, require longer than 4m ceiling if installed safety measures. Third: waterproof wool sandwich Sandwich Panel: Rockwool has strong water absorption, transport, storage, installation process, once wet, prone composite panels unglued, bulging color steel roll, deformation, and the surface of the steel plate Long-term use in wet environments, causing steel corrosion. Magnesium hollow steel composite board: As good moisture resistant magnesium plate glass color steel manufacturer, its wet and dry deformation rate, heat expansion size, are unmatched by other products, especially dry state flexural strength 15Mpa lower moisture status is 22Mpa, namely the strength of the state to a higher moisture, and never make a composite plate deformation. Tianjin Xinyu Color Volume _ Jinhong Run steel (certified) _ Yanshi Color volumes provided by the Boxing Xingfu Town 金宏润 Steel Industry and Trade Ministry. Boxing Xingfu Town 金宏润 Steel Industry and Trade Ministry (www.bxjhr.com) (www.bxjhr.com) is a leader in Binzhou, board (with) wood, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. In Jinhong Run Steel leadership with the staff warmly welcome all inquiries negotiations to create a better future for the steel Jinhong Run. You can also access (www.bxjhr.com/supply_details_45150865.html), for more information about the company.