Ọgwụgwọ nke mmiri mkpofu nwere chromium na electroplating

Ntụle mmetụta ọgwụgwọ nke ferrous sulfate na sodium bisulfite

Usoro nke mmepụta electroplating kwesịrị ịbụ galvanized, na na usoro nke galvanized ọcha, isi ihe electroplating osisi ga-eji chromate, otú electroplating mmiri mkpofu ga-emepụta a nnukwu ọnụ ọgụgụ nke chromium-nwere mmiri mkpofu n'ihi chromium plating.Chromium dị na mmiri mkpofu nwere chromium nwere chromium hexavalent, nke na-egbu egbu ma sie ike iwepụ.A na-atụgharịkarị chromium hexavalent ka ọ bụrụ chromium trivalent wee wepụ ya.Maka iwepụ mmiri mkpofu electroplating chrome, a na-ejikarị coagulation kemịkalụ na mmiri ozuzo wepụ ya.A na-ejikarị ya bụ ferrous sulfate na usoro mbelata wayo na usoro sodium bisulfite na usoro mbelata alkali.

1. ferrous sulfate na wayo mbelata ọdịda usoro

Ferrous sulfate bụ coagulant acid siri ike nwere ihe na-ebelata oxidation siri ike.Ferrous sulfate nwere ike belata ozugbo na hexavalent chromium mgbe hydrolysis na mmiri mkpofu, na-atụgharị ya ka ọ bụrụ akụkụ nke trivalent chromium coagulation na mmiri ozuzo, wee na-agbakwunye lime iji mezie pH uru ihe dị ka 8 ~ 9, ka o wee nyere aka mmeghachi omume coagulation. na-emepụta chromium hydroxide mmiri ozuzo, mmetụta mwepụ nke chromate nwere ike iru ihe dịka 94%.

Ferrous sulfate tinyere lime coagulant mbelata chromate mmiri ozuzo nwere mmetụta dị mma na mwepụ chromium yana ọnụ ala dị ala.Nke abuo, ọ dịghị mkpa ịgbanwe pH uru tupu mgbakwunye nke ferrous sulfate, na ọ dị mkpa ka ịgbakwunye lime iji mezie pH uru.Otú ọ dị, n'ihi nnukwu ego nke ferrous sulfate dosing mekwara ka mmụba dị ukwuu na apịtị ígwè, na-abawanye ọnụ ahịa ọgwụgwọ sludge.

2,.sodium bisulfite na alkali mbelata mmiri ozuzo usoro

Sodium bisulfite na alkali mbelata ọdịda chromate, pH nke mmiri mkpofu na-emezi ka ọ bụrụ ≤2.0.Mgbe ahụ, a na-agbakwunye sodium bisulfite iji belata chromate na trivalent chromium, na mmiri mkpofu na-abanye n'ọdọ mmiri zuru ezu mgbe e mechachara mbelata ahụ, a na-agbanye mmiri na-ekpofu mmiri na ọdọ mmiri na-achịkwa maka ime mgbanwe, na pH uru na-agbanwe ihe dịka 10 site n'ịgbakwunye alkali. ọnụ, na mgbe ahụ, a na-ahapụ mmiri mkpofu na tankị sedimentation iji mee ka chromate mee ka ọ dị elu, na nkwụsị nke mwepụ nwere ike iru ihe dịka 95%.

Usoro nke sodium bisulfite na alkali mbelata ọdịda chromate dị mma maka iwepụ chromium, na ọnụ ahịa ya dị elu karịa ferrous sulfate, na oge mmeghachi omume ọgwụgwọ dị ogologo oge, na pH uru kwesịrị imezi ya na acid tupu ọgwụgwọ.Otú ọ dị, e jiri ya tụnyere ọgwụgwọ sulfate ferrous, n'ụzọ bụ isi, ọ naghị emepụta sludge dị ukwuu, na-ebelata ọnụ ahịa ọgwụgwọ sludge dị ukwuu, na sludge a na-agwọ nwere ike na-ejikarị eme ihe.