Thermal Stability thiab Decomposition Temperature ntawm Calcium Carbide

1. Thermal Stability ntawm Calcium Carbide​

Calcium carbide (CaC₂)khoom pov thawjnruab nrab thermal stabilitynyob rau hauv cov qauv txheej txheem tab sis decomposes ntawm qhov kub thiab txias, tshwj xeeb tshaj yog nyob rau hauv lub xub ntiag ntawm huab cua, noo noo, los yog reactive gases. Nws stability yog cuam tshuam los ntawm:

Purity: High-purity CaC₂ (Ntau dua lossis sib npaug li 95%) yog qhov thermally ruaj khov dua cov qib kev lag luam (80–90% CaC₂), uas muaj cov impurities (piv txwv li, CaO, C, sulfur) uas qis dua qhov pib decomposition.

Ib puag ncig: Hauv cov huab cua tsis zoo (xws li argon, nitrogen), CaC₂ tseem nyob ruaj khov mus txog ~ 1600 degree. Nyob rau hauv huab cua, nws oxidizes thiab decomposes ntawm qhov kub qis dua (~ 600 degree) vim cov tshuaj tiv thaiv nrog oxygen thiab ya raws.

2. Decomposition kub​

Lub decomposition ntawm calcium carbide nyob ntawm qhov chaw thiab cua sov tus nqi:

Inert Atmospheres (xws li Argon, Nitrogen)​

Khoom -State Decomposition: Ntshiab CaC₂ pib decompose ntawm~ 1600 degree, tawg rau hauv calcium vapor (Ca) thiab carbon (C):

Cov txheej txheem no qeeb thiab yuav tsum tau ua kom muaj qhov kub thiab txias, ua rau CaC₂ ruaj khov hauv cov khoom siv hluav taws xob (ua haujlwm ntawm 2000-2500℃rau kev sib txuas).

Cua lossis Oxygen - Ib puag ncig nplua nuj​

Oxidation thiab decomposition: Hauv huab cua,CaC₂reacts nrog oxygen thiab noo noo ntawm~ 600-800 degree, tsim calcium oxide (CaO), carbon dioxide (CO₂), thiab kab carbon monoxide (CO):

Moisture accelerates tus txheej txheem no, raws li CaC₂ thawj hydrolyzes rau acetylene (C₂H₂), uas ces combusts nyob rau hauv huab cua.

Cov tshuaj tiv thaiv nrog Nitrogen​

Ntawm~ 1000 degree, CaC₂ reacts nrog nitrogen los tsim calcium cyanamide (CaCN₂), chiv thiab tshuaj tua kab mob:

Cov tshuaj tiv thaiv no yog siv los ua lag luam los tsim CaCN₂, tab sis nws kuj txwv CaC₂ kev ruaj ntseg hauv nitrogen- ib puag ncig nplua nuj.

3. Cov yam ntxwv cuam tshuam rau thermal stability​

Particle Loj: Finely hauv av CaC₂ hmoov decomposes sai dua lumps vim siab dua qhov chaw raug tshav kub thiab reactive gases.

Cua sov tus nqi: Cov cua kub ceev (piv txwv li, hauv hluav taws xob arc rauv) tuaj yeem ncua kev puas tsuaj los ntawm kev txo lub sij hawm ntawm qhov kub nruab nrab.

Cov impurities: Sulfur, phosphorus, lossis silica impurities nyob rau hauv qis -qib CaC₂ ua catalysts, txo qis decomposition kub los ntawm 100-200℃.

4. Kev cuam tshuam​

Industrial Synthesis: CaC₂ production (via carbothermal reduction) requires maintaining temperatures >2000℃nyob rau hauv hluav taws xob arc furnaces kom ua tiav kev hloov pauv ntawm txiv qaub thiab coke, thaum tsis txhob ntxov ntxov decomposition.

Cia thiab tuav: To preserve stability, CaC₂ must be stored in airtight, moisture-proof containers away from heat sources (>50 degree) thiab oxidizing tus neeg sawv cev.

Daim ntawv thov: Nws thermal stability mus txog 1600℃nyob rau hauv inert cua ua rau nws haum rau siab -kub txheej txheem xws li acetylene tiam nyob rau hauv tshwj xeeb reactors.

 

Summary of Key Temperatures​

Qhov xwm txheej​	Decomposition kub​	Thawj qhov tshwm sim​
Inert huab cua (Ar/N₂)	~ 1600 degree	CaC2​→Ca+2C
Cua/Oxygen- ib puag ncig nplua nuj	600-800 degree	Oxidation to CaO and CO₂
Cov tshuaj tiv thaiv nrog N₂	~ 1000 degree	Kev tsim ntawm CaCN₂

 

Vim li cas thiaj xaiv ZhenAn Lub Tuam Txhab rau Thermally Stable Calcium Carbide?​

ZhenAn Lub Tuam Txhab muab cov khoom siv siab -purity calcium carbide (Ntau dua lossis sib npaug li 95% CaC₂) nrog:

Txhim khu kev ruaj ntseg: Tsawg impurity theem (sulfur<0.1%, phosphorus <0.05%) to resist premature decomposition.

Tswj Particle Loj: Lumps los yog granules optimized rau qeeb decomposition nyob rau hauv industrial cov txheej txheem.

Kws Qhia Ntawv: Cov lus pom zoo rau kev khaws cia, cua sov, thiab daim ntawv thov kom ua kom zoo thermal stability.

 

📧 Tiv tauj peb ntawm​ info@zaferroalloy.com kom paub ntau ntxiv txog peb cov khoom thermally ruaj khov calcium carbide!