Hoʻohālikelike i nā hopena lapaʻau o ka ferrous sulfate a me ka sodium bisulfite
Pono ke kaʻina hana o ka hana electroplating, a ma ke kaʻina o ka hoʻomaʻemaʻe galvanized, ma ke kumu e hoʻohana ai ka mea kanu electroplating i ka chromate, no laila e hoʻohua mai ka wai ʻino electroplating i ka nui o ka wai ʻino i loko o ka chromium ma muli o ka chromium plating.Aia ka chromium i loko o ka wai ʻōpala i loko o ka chromium hexavalent chromium, he mea ʻawaʻawa a paʻakikī hoʻi e wehe.Hoʻololi pinepine ʻia ka Hexavalent chromium i trivalent chromium a wehe ʻia.No ka wehe ʻana i ka wai ʻino electroplating chrome, hoʻohana pinepine ʻia ka coagulation kemika a me ka ua e wehe ai.ʻO ka mea maʻamau ka ferrous sulfate a me ka lime reduction precipitation method a me ka sodium bisulfite a me ka alkali reduction precipitation method.
1. ferrous sulfate a me ka lime ho'ēmi i ka ua
ʻO ka ferrous sulfate kahi coagulant acid ikaika me nā waiwai hoʻemi ikaika.Hiki ke hoʻemi pololei ʻia ka ferrous sulfate me ka hexavalent chromium ma hope o ka hydrolysis i ka wai ʻino, e hoʻohuli iā ia i ʻāpana o ka trivalent chromium coagulation a me ka ua, a laila hoʻohui i ka lime e hoʻoponopono i ka waiwai pH ma kahi o 8 ~ 9, i hiki ke kōkua i ka coagulation pane i hoʻoulu i ka ua chromium hydroxide, hiki i ka hopena o ka chromate ke hiki i kahi 94%.
ʻO Ferrous sulfate a me ka lime coagulant hoʻemi chromate precipitation he hopena maikaʻi i ka wehe ʻana i ka chromium a me ke kumu kūʻai haʻahaʻa.ʻO ka lua, ʻaʻohe pono e hoʻoponopono i ka waiwai pH ma mua o ka hoʻohui ʻana o ka ferrous sulfate, a pono e hoʻohui i ka lime e hoʻoponopono i ka waiwai pH.Eia naʻe, ma muli o ka nui o ka ferrous sulfate dosing ua hoʻonui nui ʻia ka lepo hao, e hoʻonui ana i ke kumukūʻai o ka mālama ʻana i ka lepo.
2, .sodium bisulfite a me ka hoʻohaʻahaʻa alkali ke ʻano o ka ua
ʻO ka sodium bisulfite a me ka alkali reduction precipitation chromate, ua hoʻoponopono ʻia ka pH o ka wai ʻino i ≤2.0.A laila hoʻohui ʻia ka sodium bisulfite e hōʻemi i ka chromate i ka trivalent chromium, a komo ka wai ʻino i loko o ka loko piha ma hope o ka pau ʻana o ka hoʻemi ʻana, hoʻoheheʻe ʻia ka wai ʻōpala i ka wai hoʻoponopono no ka hoʻoponopono ʻana, a hoʻoponopono ʻia ka waiwai pH ma kahi o 10 ma ka hoʻohui ʻana i ka alkali. nodes, a laila, hoʻokuʻu ʻia ka wai ʻino i ka pahu sedimentation e hoʻoheheʻe i ka chromate, a hiki i ka 95%.
He maikaʻi ke ʻano o ka sodium bisulfite a me ka alkali reduction precipitation chromate no ka wehe ʻana i ka chromium, a ʻoi aku ka kiʻekiʻe o kona kumukūʻai ma mua o ka ferrous sulfate, a ʻoi aku ka lōʻihi o ka manawa o ka mālama ʻana, a pono e hoʻoponopono ʻia ka waiwai pH me ka waikawa ma mua o ka mālama ʻana.Eia nō naʻe, ke hoʻohālikelike ʻia me ka mālama ʻana i ka ferrous sulfate, ʻaʻole ia e hana i ka nui o ka ʻōpala, e hōʻemi nui ana i ke kumukūʻai o ka mālama ʻana i ka ʻōpala, a hiki ke hoʻohana hou ʻia ka ʻōpala i mālama ʻia.
Ka manawa hoʻouna: Mar-07-2024