Limestone Cov Khoom Txuj Ci Luv Tshib Calcium carbonate (CaCO3). Txiv qaub thiab limestone yog ntau ntawm cov ntaub ntawv raw rau lub tsev ntaub, industrial. Limestone tuaj yeem ua tiav rau hauv cov pob zeb thiab raug rho tawm mus rau hauv cov txiv qaub. Txiv Qaub Cao nqus dej noo los yog ntxiv dej ua kua lwg, slaked txiv qaub yog qhov tseem ceeb ntawm Ca (OH) 2, hu ua calcium hydroxide, cov kua qaub los ntawm kev xa los ntawm txiv qaub slurry, cov kua qaub ntsuab, siv ua txheej khoom thiab cib nplaum Lub
Lub cev lub cev
Calcium carbonate yog ib qho piv txwv ntawm tus qauv CaCO3. CAS No. 471-34-1. Nws yog ib yam khoom hauv ntiaj teb uas tuaj yeem pom hauv pob zeb. Tsiaj rov qab plhaub thiab qwj ntswg ntawm cov khoom xyaw tseem ceeb. Nws tshwm sim nyob rau hauv qhov ntawm calcite thiab aragonite minerals. Calcite yog ib qho siv lead ua kua, hlais tawv, thiab tsis muaj xim dawb, feem ntau dawb, muaj 56% CaO, 44% CO2, qhov kub ntawm 2.715g / cm3, Mohs hardness ntawm 3, qhov ntau ntawm nkig. Artifacts yog cov kab nruab nrab, cov pob zeb diamonds zoo li xim, grey los yog dawb, qhov ceev ntawm 2.94g / cm3, Mohs hardness ntawm 3.5-4, ntom xwm. Qhov loj ntawm limestone nyob rau hauv calcite yog qhov loj ntawm lub Crystal yog tseem ceeb heev. Cov ntom limestone tuaj yeem muaj cov porosity ntawm cov nplua-grained siv lead ua muaj zog. Qhov ntom ntawm limestone yog li 2.65 ~ 2.80g / cm3, dolomite limestone yog 2.70-2.90g / cm3 thiab dolomite yog 2.85-2.95g / cm3. Cov ntom ntom ntau nyob ntawm qhov porosity.
Limestone thermal expansion: Cov ntaub ntawv qhia tau tias qhov nruab nrab coefficient ntawm thermal expansion ntawm microcrystalline limestone yog (4.5 txog 5.0) * 10 ^ (-6) / ° C thiab cov coarse Crystal nce mus rau 10.1 * 10 nyob rau hauv ntau ntawm 800 ° C los sis tsawg dua ^ (- 6) / ° C. Qhov sim cua kub limestone tseem ceeb heev rau kev tsim cov txiv qaub. Nyob rau ntawm 800 ° C hauv qab lub zwj ceeb limestone ntawm lub limestone, cov pob zeb limestone loj hlob nyob rau hauv cov crystal, thiab kab nrib pleev tau tsim nyob rau hauv lub kwj deg crystallized heev, thiab cov neeg pleev kob no ua rau hmoov los ntawm cua kub, uas yog zoo tsim rau crystallization thiab muaj ntau Zom calcite limestone hmoov ntau dua.
Tshuaj lom neeg
Limestone, lub ntsiab ntawm cov tshuaj calcium carbonate, cov khoom siv tseem ceeb tshaj plaws yog qhov kub dua zuj zus mus rau hauv calcium oxide thiab cov roj carbon dioxide, ntxiv rau cov khoom siv hauv qab no.
l) Tshuaj tiv thaiv
Ntxiv nrog rau acid, ntau erosive tshuaj yuav tsis erode los yog tsuas qeeb lub limestone.
2) acid acid qualities
Limestone reacts nrog tag nrho cov muaj zog acids tsim calcium ntsev thiab emit carbon dioxide. Tus nqi ntawm cov tshuaj tiv thaiv nyob ntawm lub impurities muaj nyob hauv lub limestone thiab lawv siv lead ua tawm me me. Qhov siab dua cov ntsiab lus impurity, qhov loj dua qhov Crystal, qhov tsawg dua cov tshuaj tiv thaiv. Cov tshuaj tiv thaiv ntawm dolomite yog qeeb qeeb dua li ntawm limestone. Dolomite, limestone Kev txiav txim siab ntawm txoj kev: 10% hydrochloric acid dauv nyob rau hauv dolomite nrog ib tug me me ntawm npuas, ntws ntawm lub limestone yog tsausmuag los tsim cov ntxhiab npuas, cov roj ua rau tuaj yeem ua cov kua dej ntshiab los ua kab.
3) tsis kam ua ntau yam roj
Chlorine thiab hydrogen chloride nyob rau hauv lub xeev qhuav thiab chav tsev kub thiab CaCO3, qhov tshuaj tiv thaiv yog qeeb, kom txog rau thaum 600 ℃ tom qab pib ua kom nthim tsim CaCl2; sulfur dioxide nyob rau hauv chav tsev kub, txawm tias nws yog gaseous los yog kua ntawm CaCO3 tsis muaj kev cuam tshuam tseem ceeb; thiab nitrogen dioxide NO2) reacts nrog CaCO3 ntawm 15 ° C los tsim Ca (NO3) 2, TSIS thiab CO2.
tsim txom
Kev koom tes hauv cov neeg ua hauj lwm tsuas yog feem ntau tshwm rau saum txoj hlab ntsws o, bronchitis, yuav muaj feem xyuam nrog kev mob ntsws. Cov duab xoo hluav taws xob tsom pom cov qog ntshav qab zib, qhov hnyuv zoo nkauj. Cov neeg ua haujlwm raug mob ntawm pneumoconiosis feem ntau nrog cov khoom muaj nyob rau hauv cov impurities txog silica.
Raug cais tawm ntawm cov cheeb tsam muaj kab mob, txwv kev nkag. Nws raug nquahu tias cov neeg ua haujlwm thaum muaj xwm txheej kub hnyav siv cov phom plua plav (puv npog) thiab hnav khaub ncaws ua haujlwm. Txhawm kom tsis txhob muaj plua plav, ua tib zoo ntxuav, muab tso rau hauv lub hnab uas xa mus rau qhov chaw zoo. Yog hais tias ntau ntawm leakage, them nrog daim ntaub yas, canvas. Sau los yog thauj mus rau qhov chaw pov tseg.
