Sodium Hydrosulfide Method for Valuable Metal Recovery from Acidic Water

Background

M'zaka makumi awiri zapitazi, ndi chitukuko chofulumira cha sayansi ndi teknoloji ndi zomangamanga zachuma, kufunikira kwa mineral resources kwakhala kukuwonjezeka tsiku ndi tsiku. Kupezeka kwa ores omwe amakumbidwa mosavuta komanso osankhidwa amodzi olemera akuchulukirachulukira. Migodi ya ores yovuta yokhala ndi kukula kwa tinthu tating'ono komanso magiredi otsika ikukulirakulira, ndipo pakufunika kukula kwamitundu yosiyanasiyana komanso mtundu. Kuti tikwaniritse zosowa za magawo osiyanasiyana a chuma cha dziko pazachuma, pakufunika mwachangu kukhazikitsa njira zatsopano zopangira mchere zomwe zili zogwira mtima, zopindulitsa pachuma, komanso zowongolera chilengedwe.

Njira yopezera zitsulo zamtengo wapatali kuchokera kumadzi acidic pogwiritsa ntchito Sodium hydrosulfide ali ndi chiwongola dzanja chachikulu komanso phindu lalikulu lazachuma. Ndondomekoyi ili ndi izi:

01.Thanki Yapamwamba Yosungiramo Madzi

Madzi a asidi omwe amapangidwa panthawi ya migodi amayamba kutuluka kuchokera mu thanki yapamwamba kwambiri yosungiramo madzi kupita mu thanki yoyamba yochotsera chitsulo, komwe amawonjezera laimu. The trivalent iron ayoni m'madzi acidic precipitate pamodzi ndi calcium sulfate, ndipo ambiri a trivalent ayoni ayironi amachotsedwa m'madzi acidic.

02.First Iron Removal Reaction Tank

Zomwe madzi amadzimadzi amayenda kuchokera ku tanki yochotsa chitsulo kupita mu thanki yoyamba ya degassing, pomwe flocculant imawonjezedwa.

03.Second Iron Removal Reaction Tank

Madzi aiwisi, omwe asakanizidwa bwino ndi laimu slurry ndi flocculant, amalowa mu thanki yochotsa chitsulo, momwe iron hydroxide ndi calcium sulfate precipitate zimakhazikika pansi pa thanki yokhuthala.

04. First Degassing Tank

Madzi acidic okhala ndi ayoni achitsulo amtengo wapatali, omwe ma ayoni ambiri achitsulo amachotsedwa, amayenda ndi mphamvu yokoka muzitsulo zachitsulo za sulfide.

05.Metal sulfide Reactor

Muzitsulo sulfide riyakitala, madzi acidic bwinobwino wothira zitsulo sulfide precipitate ndi sodium hydrosulfide, kupanga zitsulo sulfide particles.

06.Thanki Yachiwiri Yotsitsa Gasi

The osakaniza madzi munali zitsulo sulfide maganizo umayenda ndi mphamvu yokoka mu yachiwiri degassing thanki Ufumuyo zitsulo sulfide riyakitala, kumene flocculant ndi anawonjezera kulimbikitsa agglomeration zitsulo sulfide particles mu zikuluzikulu particles.

07.Metal sulfide thickening tank

Mtsinje wachitsulo wa sulfide umakhazikika pansi pa thanki yokhuthala yachitsulo. Chofufutira chimachotsa mpweya wokhazikika pakati pa pansi pa thanki yokhuthala. Pampu ya reflux mosalekeza imabwezeretsanso gawo lina la mpweya kuchokera pansi pa thanki yokhuthala kubwerera ku tanki yochotsa chitsulo, pomwe madzi otsala amatumizidwa ku mulu wa zinyalala ndi mpope wotumizira.

08.Metal sulfide thickening tank

The kufalitsidwa mpope mosalekeza recycles gawo la mpweya kuchokera pansi pa zitsulo sulfide thickening thanki kubwerera ku zitsulo sulfide riyakitala. Gawo lina la mpweya wapansi limatumizidwa ku makina osindikizira a plate-ndi-frame kuti alowerere muzitsulo za sulfide.

Ubwino wa njira yopezera zitsulo zamtengo wapatali kuchokera kumadzi acidic pogwiritsa ntchito sodium hydrosulfide ndi motere:

Kubweza mwachindunji zitsulo zamtengo wapatali kuchokera kumadzi onyansa a acidic opangidwa ndi migodi kumawononga pafupifupi theka la njira zopangira mchere. Mlingo wa sulfide wamtengo wapatali wopezekanso ndi pafupifupi kuwirikiza kawiri kuposa njira zachikhalidwe zopangira mchere, zomwe zimakhala ndi chiwopsezo chachikulu komanso phindu lalikulu lazachuma. Madzi otayira pambuyo pochira amakhala ndi ma ion achitsulo ochepa kwambiri, zomwe zimapangitsa kuti pakhale ndalama zochepetsera madzi otayira komanso zabwino zachilengedwe