Magnesium sulfate heptahydrate, tseem hu ua sulphobitter, ntsev iab, ntsev cathartic, ntsev Epsom, tshuaj mis MgSO4 · 7H2O), yog dawb lossis tsis muaj xim acicular lossis oblique columnar siv lead ua, tsis muaj ntxhiab, txias thiab me ntsis iab. Tom qab cua sov decomposition, cov dej crystalline maj mam tshem tawm mus rau anhydrous magnesium sulfate. Nws yog siv rau hauv kev tsim cov chiv, tawv, luam ntawv thiab dyeing, catalyst, papermaking, plastics, porcelain, pigments, matches, explosives thiab fireproof cov ntaub ntawv. Nws tuaj yeem siv rau kev luam ntawv thiab dyeing nyias paj rwb ntaub thiab txhob lo lo ntxhuav, ua tus neeg sawv cev hnyav rau paj rwb txhob lo lo ntxhuav thiab filler rau cov khoom kapok, thiab siv ua Epsom ntsev hauv tshuaj.
Cov khoom siv lub cev:
Cov tsos thiab cov khoom: yog cov khoom siv pob zeb rhombic, rau plaub lub ces kaum granular lossis rhombic siv lead ua, tsis muaj xim, pob tshab, sib sau ua ke rau dawb, paj yeeb lossis ntsuab iav ci. Cov duab yog fibrous, acicular, granular lossis hmoov. Tsis muaj ntxhiab, saj iab.
Kev yaj: Yooj yim yaj hauv dej, me ntsis yaj hauv ethanol thiab glycerol.
Cov khoom siv tshuaj lom neeg:
Kev Ruaj Kho: Ruaj khov hauv huab cua noo qis dua 48.1 ° C. Nws yooj yim rau kev nyob hauv huab cua sov thiab qhuav. Thaum nws siab dua 48.1 ° C, nws poob dej crystalline thiab ua magic sulfate. Tib lub sijhawm, magnesium sulfate tau precipitated. Ntawm 70-80 ° C, nws poob 4 dej crystal, poob 5 dej crystal ntawm 100 ° C, thiab poob 6 dej crystal ntawm 150 ° C. Ntawm 200 ° C Magnesium-zoo li dej sulfate, cov khoom dehydrated raug muab tso rau hauv huab cua noo kom rov nqus dej. Hauv cov tshuaj saturated ntawm magnesium sulfate, cov dej-ua ke crystalline nrog 1, 2, 3, 4, 5, 6, thiab 12 dej tuaj yeem ua crystal. Hauv -1.8 ~ 48.18 ° C saturated aqueous kua, magnesium sulfate yog precipitated, thiab hauv cov dej saturated ntawm 48.1 txog 67.5 ° C, magnesium sulfate yog precipitated. Thaum nws siab tshaj 67.5 ° C, magnesium sulfate yuav precipitated. Cov neeg txawv teb chaws yaj ntawm ° C thiab magnesium sulfate ntawm tsib lossis plaub dej sulfate tau tsim. Magnesium sulfate tau hloov mus ua magnesium sulfate ntawm 106 ° C. Magnesium sulfate tau hloov mus ua magnesium sulfate ntawm 122-124 ° C. Magnesium sulfate hloov mus ua magnesium sulfate ruaj khov ntawm 161 ～ 169 ℃.
Kev lom: lom
Tus nqi PH: 7, Nruab Nrab
Daim Ntawv Thov Tseem Ceeb:
1) Thaj chaw ua zaub mov
Ua ib tug neeg sawv cev txhawb zog zaub mov. Kuv lub teb chaws cov cai lij choj siv tau rau cov khoom noj mis nyuj, nrog rau qhov ntau ntawm 3 txog 7g / kg; qhov ntau ntawm kev siv hauv cov kua dej haus thiab cov dej haus mis nyuj yog 1.4 ~ 2.8g / kg; qhov siab tshaj plaws siv hauv cov dej haus minerals yog 0.05g / kg.
2) Kev lag luam hauv kev lag luam
Feem ntau siv nrog ntsev calcium rau dej cawv txiv hmab. Ntxiv 4.4g/100L dej tuaj yeem ua rau qhov nyuaj dua 1 degree. Thaum siv, nws tuaj yeem ua rau iab thiab tsw ntxhiab hydrogen sulfide.
Siv ua lub suab nrov, cov khoom tawg, kev ua ntawv, cov khoom siv porcelain, chiv, thiab kev kho mob qhov ncauj laxes, thiab lwm yam, cov khoom siv dej ntxhia ntxiv.
3) Kev ua liaj ua teb
Magnesium sulfate siv rau hauv cov chiv hauv kev ua liaj ua teb vim tias magnesium yog ib qho ntawm cov khoom tseem ceeb ntawm chlorophyll. Cov qoob loo ntawm cov nroj tsuag hauv lauj kaub lossis magnesium feem ntau siv, xws li txiv lws suav, qos yaj ywm, paj noob hlis, thiab lwm yam. Magnesium sulfate muaj qib siab ntawm kev yaj piv rau lwm cov chiv. Magnesium sulfate kuj tseem siv ua ntsev da dej.
Txoj kev npaj:
1) Txoj Kev 1:
Cov kua qaub sulfuric ntxiv rau hauv cov magnesium carbonate (magnesite), cov pa roj carbon dioxide raug tshem tawm, recrystallized, Kieserite (MgSO4 · H2O) raug yaj rau hauv dej kub thiab recrystallized, ua los ntawm dej hiav txwv.
2) Txoj Kev 2 (Txoj kev lim dej hiav txwv)
Tom qab cov brine raug evaporated los ntawm txoj kev brine, cov ntsev kub siab raug tsim tawm, thiab nws cov khoom sib xyaw yog MgSO4> 30 feem pua. 35%, MgCl2 li 7%, KCl li 0.5%. Cov bittern tuaj yeem leached nrog MgCl2 kua ntawm 200g / L ntawm 48 ℃, nrog tsawg dua NaCl kua thiab ntau dua MgSO4 kua. Tom qab sib cais, cov nyoos MgSO4 · 7H2O tau precipitated los ntawm kev txias ntawm 10 ℃, thiab cov khoom tiav tau txais los ntawm kev rov ua dua theem ob.
3) Txoj Kev 3 (Txoj Kev Sulfuric Acid)
Hauv lub tank neutralization, rhombotrite maj mam ntxiv rau hauv dej thiab niam cawv, thiab tom qab ntawd neutralized nrog sulfuric acid. Xim hloov ntawm xim av mus rau liab. Lub pH tau tswj kom Be 5, thiab qhov ceev sib piv yog 1.37 ~ 1.38 (39 ~ 40 ° Be). Cov tshuaj neutralization tau lim ntawm 80 ℃, tom qab ntawd pH tau kho rau 4 nrog sulfuric acid, cov noob tsim nyog tau ntxiv, thiab txias rau 30 ℃ rau crystallization. Tom qab sib cais, cov khoom tiav lawm tau qhuav ntawm 50 ~ 55 ℃, thiab niam cawv rov qab mus rau lub tank neutralization. Magnesium sulfate heptahydrate kuj tseem tuaj yeem npaj los ntawm kev neutralizing reaction ntawm qis concentration sulfuric acid nrog 65% magnesia hauv momorrhea los ntawm kev lim, nag lossis daus, concentration, crystallization, centrifugal sib cais thiab qhuav, nws yog ua los ntawm magnesium sulfate.
Cov qauv tshuaj lom neeg ntawm cov tshuaj tiv thaiv: MgO + H2SO4 + 6H2O → MgSO4 · 7H2O.
Kev ceev faj txog kev thauj mus los:Lub ntim khoom yuav tsum tiav thaum thauj mus los, thiab kev thauj khoom yuav tsum muaj kev nyab xeeb. Thaum lub sijhawm thauj mus los, xyuas kom meej tias lub thawv yuav tsum tsis txhob xau, tawg, poob, lossis puas tsuaj. Nws raug txwv tsis pub sib tov nrog cov kua qaub thiab cov tshuaj noj. Thaum lub sijhawm thauj mus los, nws yuav tsum tau tiv thaiv los ntawm tshav ntuj, nag thiab kub heev. Lub tsheb yuav tsum tau ntxuav kom huv si tom qab thauj mus los.
Kev ceev faj ua haujlwm:Ua haujlwm kaw thiab ua kom muaj cua nkag tau zoo. Tus neeg teb xov tooj yuav tsum ua raws li cov txheej txheem ua haujlwm tom qab kev cob qhia tshwj xeeb. Nws raug pom zoo kom cov neeg teb xov tooj hnav lub ntsej muag lim dej uas nqus tau tus kheej, tsom iav tiv thaiv kev nyab xeeb tshuaj, hnav khaub ncaws ua haujlwm tiv thaiv tshuaj lom, thiab hnab looj tes roj hmab. Tsis txhob muaj plua plav. Tsis txhob kov cov kua qaub. Tshem tawm lub ntim kom me me thiab maj mam kom tiv thaiv cov ntim kom tsis txhob puas. Nruab nrog cov khoom siv kho mob thaum muaj xwm txheej ceev. Cov thawv khoob yuav muaj cov khoom seem tsis zoo. Thaum cov plua plav hauv huab cua ntau dua li tus qauv, peb yuav tsum hnav lub ntsej muag lim dej uas nqus tau tus kheej. Thaum cawm neeg thaum muaj xwm txheej ceev lossis tshem tawm, yuav tsum hnav lub ntsej muag tiv thaiv kab mob.
Kev ceev faj txog kev khaws cia:Khaws cia rau hauv qhov chaw txias thiab muaj cua nkag. Tsis txhob cia hluav taws thiab cua sov. Khaws cia cais ntawm cov kua qaub thiab tsis txhob cia sib xyaw ua ke. Qhov chaw khaws cia yuav tsum muaj cov khoom siv tsim nyog los tswj cov dej xau.
Ntim: 25KG / Hnab
Lub sijhawm tshaj tawm: Plaub Hlis-10-2023