Umaleko weoksidi kumphezulu wentsimbi eshushu-eqengqelekayo ipleyiti egqunyiweyo idla ngokuba ngqindilili. Ukuba isuswe kuphela ngokucholwa kweekhemikhali, ayiyi kwandisa kuphela ixesha lokukhetha kunye nokunciphisa ukusebenza kakuhle kwe-pickling, kodwa iphinde ikhulise iindleko zokukhetha kakhulu. Ngoko ke, ezinye iindlela kufuneka zisetyenziswe njengeendlela ezincedisayo zokuphatha kwangaphambili i-steel plate. Kukho iindlela ezintathu eziphambili zonyango zangaphambili zokukhetha:

1. Uqhushumbo

I-shot peening yindlela esetyenziswa ngokubanzi kwi-mechanical dephosphorization ngoku. Umgaqo kukusebenzisa isixhobo sokudubula peening ukutshiza shot ecikizekileyo granular steel (isanti) ukuba nefuthe ipleyiti stainless steel ezityatyekwe ukususa umaleko oxide phezu komhlaba intsimbi. Emva kokuba unyango shot peening, inxalenye umaleko oxide isusiwe, kunye nolwakhiwo umaleko oxide eseleyo kumphezulu webhodi iba ngamaxesha athile kwaye ekhululekile, nto leyo eyinzuzo kwinkqubo pickling elandelayo.

2. Unyango lwe-alkali leaching

Unyango lwe-alkali leaching luyi-oxidative alkaline leaching kunye nokunciphisa i-alkaline leaching. I-alkali yohlobo lwe-oxidation leaching ikwabizwa ngokuba "yindlela yokuhlamba ityuwa". I-Alkaline CrO3, kwaye ngenxa yokutshintsha kwesakhiwo kunye nomthamo we-oxide layer, i-oxide layer iya kuwa. Ukuncitshiswa kwealkaline leaching kukutshintsha iioksidi zentsimbi ezinganyibilikiyo njengentsimbi, nickel, chromium kunye nezinye iioksidi zentsimbi ezinganyibilikiyo kumaleko weoxide abuyele kwisinyithi kunye neeoksidi ezinexabiso eliphantsi nge-arhente yokunciphisa eyomeleleyo uNaH, kwaye wenze umaleko weoksidi uqhawuke kwaye uwe, ngaloo ndlela unciphisa ixesha lokukha, uphucule ukusebenza kakuhle.

Kuyafaneleka ukuba uqaphele ukuba iipleyiti zensimbi ezingenasici ziya kubangela iqondo elithile le-Cr6 + ungcoliseko ngexesha lenkqubo yonyango lwe-oxidative alkali leaching. Ukunciphisa unyango lwe-alkaline leaching lunokuphelisa ingxaki yongcoliseko lwe-Cr6 +, kodwa izinto zayo eziphambili, i-NaH, ayikwazi ukuveliswa eChina. Okwangoku, eyona ndlela isetyenziswa kakhulu e-China yi-potassium permanganate oxidation uhlobo lonyango lwe-alkali leaching, ngelixa unyango lokunciphisa uhlobo lwe-alkali leaching lusetyenziswa phesheya.

3. I-electrolysis yetyuwa engathathi hlangothi

Inkqubo ye-electrolysis yetyuwa engathathi hlangothi isebenzisa isisombululo se-Na2SiO4 samanzi njenge-electrolyte. I-plate ye-stainless film-coated plate ingadlula kwintsimi yombane phakathi kwe-cathode kunye ne-anode, itshintshe ngokuqhubekayo i-cathode kunye ne-anode, kwaye isuse umgca we-oxide ongaphezulu ngokusebenzisa isenzo samanje. Inkqubo yenkqubo ye-electrolysis yetyuwa engathathi hlangothi isekelwe kwinto yokuba kunzima ukunyibilikisa iioksidi ze-chromium, i-manganese, kunye nentsimbi kwi-oxide layer i-oxidized kwi-ions exabiso eliphezulu e-soluble, ngaloo ndlela inyibilika i-oxide layer; Isinyithi kwibhetri i-oxidized kwi-ion, ukwenzela ukuba umaleko we-oxide oqhotyoshelwe kumphezulu uhlanjululwe.