Bayyana Tsarin Haƙar Zinare Ta Amfani da Sodium Cyanide

I. Gabatarwa

A cikin zamani Zinariya hakar ma'adinai masana'antu, Sodium cyanide yana taka muhimmiyar rawa. Ba kamar yadda ake yin amfani da zinare na tsohuwar zamani ba, ayyukan hakar gwal na kasuwanci na yau na iya fitar da zinare daga dutsen dutse mai ƙarancin abun ciki na zinariya, wani lokacin ma ya kai kashi 0.005%, inda zinaren ba ya iya gani da ido. Sodium cyanide shine mabuɗin sinadari mai mahimmanci a cikin wannan hadadden tsari na hakar, yana ba da damar raba gwal da karama da inganci. Wannan labarin zai bincika dalla-dalla yadda sodium Cyanide ana amfani da shi wajen hakar gwal.

II. Tushen Sodium Cyanide

A. Abubuwan Sinadarai

Sodium cyanide, tare da tsarin sinadarai NaCN, wani farin kristal ne mai ƙarfi. Yana bayyana a matsayin granules ko foda kuma yana da saurin lalacewa. Wannan fili yana da kamshin almond mai ɗaci. Dangane da solubility, yana da matuƙar narkewa a cikin ruwa, yayin da ɗanɗano mai narkewa kawai a cikin ethanol. Na kimiyya, sodium cyanide tushe ne mai ƙarfi kuma gishiri acid mai rauni. Maganin sa mai ruwa-ruwa hydrolyzes don samar da hydrocyanic acid, yin maganin da karfi alkaline. Musamman ma, sodium cyanide yana da guba sosai. Ko da ɗan ƙaramin adadin, ko ta hanyar hulɗa da fata, shakar numfashi, ko sha, na iya haifar da guba mai tsanani kuma mai yuwuwa ya mutu. Yana aiwatar da tasirin sa na mutuwa ta hanyar sakin ions cyanide (CN-) waɗanda ke da alaƙa da alaƙa da ion baƙin ƙarfe fiye da iskar oxygen. Wannan yana tarwatsa al'amuran oxidative na sel, a ƙarshe yana haifar da asphyxia cell da hypoxia nama.

B. Muhimmancin Masana'antu

Bayan rawar da take takawa wajen hakar gwal, sodium cyanide tana da muhimmaci a sassan masana'antu daban-daban. A cikin masana'antar lantarki, yana aiki azaman muhimmin sashi don sanya jan karfe, azurfa, cadmium, da zinc. Yana taimakawa rage polarization na anodic, yana tabbatar da narkar da anode na yau da kullun, tabbatar da maganin plating, da haɓaka polarization na cathodic don samun nau'ikan plating iri ɗaya da inganci. A cikin aikin ƙarfe, ana amfani da shi sosai a cikin hakar karafa masu daraja kamar zinariya da azurfa. Bugu da ƙari, yana da mahimmancin albarkatun ƙasa a cikin masana'antar sinadarai don kera nau'ikan cyanide na inorganic da samar da hydrocyanic acid. Har ila yau, yana taka muhimmiyar rawa a cikin haɗakar kayan halitta irin su gilashin halitta, kayan aikin roba daban-daban, robar nitrile, da masana'antar fiber na roba. A cikin masana'antar rini, ana amfani da shi wajen samar da cyanuric chloride, matsakaici mai mahimmanci don dyes mai amsawa da mafari don abubuwan fata. Bugu da ƙari, masana'antar harhada magunguna suna amfani da sodium cyanide a cikin haɗin mahadi kamar cyanoacetic acid methyl ester da diethyl malonate. Gabaɗaya, haɓakar sodium cyanide da sake kunnawa sun sa ya zama sinadari mai mahimmanci a cikin hanyoyin masana'antu na zamani.

III. Tsarin Ma'adinan Zinariya tare da Sodium Cyanide

A. Tattalin Arziki

Mataki na farko na amfani da sodium cyanide don Hakar zinare yana shirya ma'adinai. An fara murƙushe manyan gungu-gungu na tama mai ɗauke da zinari zuwa ƙananan guntu ta hanyar amfani da injin murkushe masu nauyi. Wannan murkushewar farko tana rage girman ma'adinin zuwa mafi girman girma, yawanci kusan milimita 150-300. Bayan haka, takin da aka niƙa yakan fuskanci murkushewa na biyu, sau da yawa tare da mazugi na mazugi ko masu yin tasiri, yana ƙara rage girman ƙwayar zuwa kusan 20-50 millimeters. Bayan haka, ana niƙa ma'adinan a cikin foda mai kyau ta hanyar injin ball ko sanda, wanda ke tabbatar da cewa yawancin barbashi ba su wuce 0.074 millimeters ba. Wannan niƙa mai kyau yana da mahimmanci yayin da yake ƙara girman saman ma'adinan, yana sauƙaƙe kyakkyawar hulɗa da amsawa tare da maganin cyanide a cikin aikin leaching na gaba. Bugu da kari, da ore na iya shiga cikin tsarin allo don ware masu girma dabam dabam, bada damar ƙarin madaidaici kula da maganin sunadarai da kuma inganta ingancin hakar.

B. Tsarin Leaching

Da zarar an shirya ma'adinan da kyau, sai ta shiga matakin leaching, wanda shine zuciyar aikin hakar gwal tare da sodium cyanide. An haxa tama mai foda tare da maganin cyanide da aka tsara a hankali, yawanci tare da ƙwayar sodium cyanide wanda ke jere daga 0.05% zuwa 0.1%. A wannan mataki, wani sinadari yana faruwa inda zinaren da ke cikin ma'adinan ya yi aiki tare da ion cyanide (CN-) a gaban iskar oxygen. Gabaɗayan amsa za a iya wakilta ta hanyar lissafin: 4Au + 8NaCN + O₂ + 2H₂O → 4Na[Au(CN)₂] + 4NaOH. Anan, kwayoyin zarra na gwal suna samar da wani hadadden hadadden hadadden hadaddiyar giyar tare da ions cyanide, suna haifar da cyanide sodium gold (Na[Au(CN)₂]), wanda ke narkewa a cikin maganin. Tsarin leaching yana buƙatar tsananin kulawa da sigogi daban-daban. Ana kiyaye pH na maganin a kusa da 10-11 don tabbatar da kwanciyar hankali na cyanide kuma ya hana samuwar iskar hydrogen cyanide mai guba. Hakanan yanayin zafi yana taka muhimmiyar rawa; Yawanci, ana kiyaye shi a cikin kewayon 20-30 ° C. Matsakaicin zafin jiki yana rage saurin amsawa, yayin da zafi mai yawa zai iya haifar da saurin ƙafewar maganin da yuwuwar lalata kayan aiki. Ana ci gaba da samar da isassun tashin hankali da iska don tabbatar da haɗawa iri ɗaya na tama da maganin cyanide, haɓaka ingantaccen narkar da gwal.

C. Matsayin Hazo

Bayan aikin leaching, zinari yanzu yana cikin nau'in hadadden cyanide na zinare mai narkewa a cikin maganin. Don dawo da zinare, ana aiwatar da matakin hazo. Wannan ya ƙunshi ƙara foda na zinc ko carbon da aka kunna zuwa mafita. Lokacin da aka yi amfani da foda na zinc, motsin motsi yana faruwa. Zinc, da yake ya fi gwal aiki, yana kawar da zinare daga hadadden cyanide na gwal. Ana iya bayyana halayen sinadaran kamar: 2Na[Au(CN)₂] + Zn → Na₂[Zn(CN)₄] + 2Au. Za a rage atom ɗin gwal ɗin zuwa sifarsu ta ƙarfe kuma ta fito daga mafita. Idan ana amfani da carbon da aka kunna, babban filin sa da kaddarorin talla suna shiga cikin wasa. Kamfanonin cyanide na zinare suna shiga saman saman carbon ɗin da aka kunna, suna raba gwal ɗin da mafita yadda ya kamata. Ana kuma ƙara sarrafa carbon ɗin da aka ɗora don dawo da gwal ɗin da aka haɗa. Da zarar hazo ya cika, ana tace slurry da aka samu ko kuma a sanya shi a tsakiya don ware tsayayyen hazo daga ruwan da ya rage, wanda zai iya ƙunsar ragowar cyanide da sauran ƙazanta.

D. Tsari Tsabta

Zinare da aka samu daga matakin hazo har yanzu yana ƙunshe da wasu ƙazanta kuma yana buƙatar a tace shi don cimma babban tsarkin da ake buƙata a kasuwa. Tsarin tacewa yawanci yana farawa ne da narkewa, inda zinaren zinare ke zafi da zafi a cikin tanderu. Wannan yana narkar da gwal, yana barin ƙazanta masu yawa su nutse zuwa ƙasa yayin da narkakkar zinariyar za a iya cirewa ko kuma a zuba a cikin gyare-gyare. Bayan haka, ana iya amfani da electrolysis don ƙarin tsarkakewa. A cikin tantanin halitta na electrolytic, zinare mara kyau an yi shi ne anode, kuma siriri na zinariya tsantsa yana aiki azaman cathode. Lokacin da wutar lantarki ta wuce ta cikin tantanin halitta, ions na zinariya daga anode suna ƙaura zuwa cathode kuma suna ajiyewa a matsayin zinariya tsantsa, suna barin sauran ƙazanta a cikin anode. Ta hanyar waɗannan matakan tsaftacewa, zinari na iya kaiwa matakin tsabta har zuwa 99.99%, saduwa da ƙa'idodin masana'antu daban-daban, yin kayan ado, da aikace-aikacen saka hannun jari.

IV. Aikace-aikacen Tunanin Tsaro da Muhalli

A. Tsaron Ma'aikata

Ganin matsanancin guba na sodium cyanide, tabbatar da amincin ma'aikata yana da mahimmanci. Ma'aikatan da ke cikin aikin hakar gwal ta amfani da sodium cyanide dole ne a ba su cikakken horo na tsaro. Suna buƙatar ƙware sosai wajen sarrafa sinadarai, fahimtar haɗarin da ke tattare da shi, da sanin hanyoyin gaggawa na gaggawa. Kayan kariya na sirri (PPE) ba za a iya sasantawa ba. Ya kamata ma'aikata su sanya safofin hannu marasa ƙarfi don hana fataucin fata, tabarau don kare idanunsu, da na'urorin numfashi don gujewa shakar duk wani iskar cyanide da ake iya fitarwa. Bugu da kari, dole ne a samar da tsauraran ka'idojin aminci. Misali, wuraren aiki ya kamata su kasance da iskar iska don rage yawan duk wani nau'in cyanide mai iska. Har ila yau, ya kamata a hana ma'aikata ci, sha, ko shan taba a wuraren da sodium cyanide ke ciki don hana shiga cikin haɗari. Binciken likita na yau da kullun ya kamata ya zama tilas don sanya ido kan lafiyar ma'aikata, musamman wadanda ke sarrafa sinadari kai tsaye, don gano duk wata alama ta fara fallasa cyanide.

B. Tasirin Muhalli

Yin amfani da sodium cyanide a cikin hakar ma'adinin zinare kuma yana haifar da matsalolin muhalli masu mahimmanci. Bayan aikin hakar gwal, sauran kayan sharar gida, da aka sani da Cyanide wutsiya, ya ƙunshi ragowar cyanide. Idan ba a sarrafa shi yadda ya kamata ba, waɗannan wutsiya na iya haifar da mummunar barazana ga muhalli. Cyanide zai iya shiga cikin ƙasa da ruwan ƙasa, yana gurɓata tushen ruwa kuma yana cutar da rayuwar ruwa. A cikin ruwan saman, ko da ƙananan adadin cyanide na iya rushe ma'auni na muhalli, wanda ke haifar da kisa kifaye da sauran mummunan tasiri a kan bambancin halittu. Don rage waɗannan haɗarin muhalli, kamfanonin hakar ma'adinai dole ne su aiwatar da dabarun sarrafa muhalli masu ƙarfi. Hanya ɗaya ita ce a bi da wutsiyar cyanide don rage abun ciki na cyanide zuwa matakan tsaro. Wannan na iya ƙunsar tsarin kula da sinadarai, kamar oxidation ko hanyoyin hazo, don canza cyanide mai guba zuwa mahaɗan marasa lahani. Wani ma'auni mai mahimmanci shine zubar da kyau da kuma kiyaye wutsiya da aka yi. Amintattun wuraren zubar da ƙasa ko tafkunan wutsiya tare da layukan da suka dace na iya hana zubar duk wani gurɓataccen abu da ya rage a cikin muhalli. Bugu da ƙari, ci gaba da sa ido kan muhallin da ke kewaye, gami da ingancin ruwa da yanayin ƙasa, yana da mahimmanci don gano duk wata lalacewar muhalli da wuri da ɗaukar matakin gyara cikin gaggawa.

V. Kammalawa

Sodium cyanide babu shakka wani sinadari ne mai mahimmanci a cikin hakar gwal na zamani, wanda ke ba da damar fitar da zinare daga ma'adanai masu ƙarancin abun ciki na zinariya. Ya kasance ginshiƙin zinariya Masana'antar hakar ma'adinai shekaru da yawa, yana sauƙaƙe samar da zinare da ke haɓaka masana'antu daban-daban, daga yin kayan ado zuwa aikace-aikacen fasaha na zamani. Koyaya, amfani da shi yana buƙatar matuƙar kulawa ga aminci da kariyar muhalli. Kamfanonin hakar ma'adinai dole ne su saka hannun jari a cikin na'urorin aminci na zamani, su ba da cikakkiyar horo ga ma'aikata, da aiwatar da tsauraran ka'idojin aminci don kiyaye rayuka. A lokaci guda, suna da alhakin ɗabi'a da na shari'a don sarrafa tasirin muhalli, kula da wutsiyar cyanide cikin gaskiya da kuma lura da yanayin yanayin don hana lalacewa na dogon lokaci. Yayin da fasahar ke ci gaba, ya kamata a ci gaba da gudanar da bincike kan mafi aminci kuma mafi aminci ga muhalli maimakon sodium cyanide. Ta hanyar daidaita ma'auni tsakanin ingantaccen hakar zinare, amincin ma'aikata, da kula da muhalli ne masana'antar hakar gwal za ta iya bunƙasa dawwama a nan gaba.