khoom

Lwm Yam Siv

♦ Hauv kev lag luam yees duab los tiv thaiv cov kev daws teeb meem los ntawm oxidation.
Nws yog siv rau kev tsim cov roj hmab tshuaj thiab lwm yam kev siv tshuaj sib xyaw.
Nws siv tau rau lwm cov ntawv thov suav nrog kev muab tshuaj txhuam, roj rov qab, cov khoom noj, ua kom tuag, thiab xab npum.

Kev npaj txoj kev

1. Thee hmoov hmoov txo txoj kev: MUAB MIRABILITE thiab cov hmoov hluav taws xob thiab cov calcine thiab cov calcine hnyav thiab txo qis ntawm 800-1100 ℃. Tom qab txias, cov khoom yog yaj nyob rau hauv ib tug dilute alkali daws los ua kua. Tom qab sawv thiab qhia meej, sab sauv alkali kev daws teeb meem yog concentrated kom tau txais sodium sulfide. Tom qab hloov lub tank thiab flake (lossis granulation) yog siv kom tau txais cov nplaim taws (lossis cov khoom lag luam sulidium

Tshuaj lom neeg cov tshuaj tiv thaiv: NA2O4 + 2c → na2s + 4CO

2. Cov Qauv Uas Yuav Tsum Siv: Siv 380-420 G / L Sodium Hydium Kev daws teeb meem hydroxide kom nqus tau cov roj uas muaj h iTs> 85%. Cov khoom ua tau tshwm sim tau evaporated thiab concentrated kom tau sodium sulfide tiav khoom.

Tshuaj lom neeg cov tshuaj tiv thaiv: H2S + 2NNoh → na + + 2h2o

3. Barium Sulfide Txoj Kev: Sodium Sulfide tuaj yeem tsim los ua cov khoom noj khoom haus ntawm cov khoom noj thaum nag sulfate sulfate.

Nws cov tshuaj tiv thaiv kev sib npaug: Bas Bas - NA2O4 → NA2S + Baso4 ↓

4. Kev txo cov roj: Nyob rau hauv muaj ntawm cov hlau av (lossis cov roj carbon monoxide) yog cov neeg tsim khoom siv roj hmab % Na2s).

Tshuaj Lom Zem:

Na2 + 4co → na2s + 4CO2

Na2 + 4h2 → na2s + 4h2o [3]

5. Cov Qauv Ntau Lawm: Cov txheej txheem ua kom zoo nkauj siv cov txheej txheem Sodium Nws tau muab tso rau hauv ob chav ua haujlwm evapor Nws yog tom qab ntawd nqus mus rau hauv ib evaporator (ua los ntawm lub ntshiab kom huv si Tom qab ntsuas thiab ntim khoom, cov khoom tiav tau txais.