2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
Ib lub txiv qaub kiln yog siv los tsim cov kua qaub nrawm los ntawm calcination ntawm limestone(calcium carbonate). Cov tshuaj tiv thaiv no tshwm sim ntawm 900 ° C tab sis qhov kub ntawm ib ncig ntawm 1000 ° C feem ntau yog siv los ua kom cov tshuaj tiv thaiv ua ntej sai. 2 Quicklime tau siv los ua plaster thiab mortar rau kev tsim kho.
Cov txiv qaub qub siv rau dab tsi?
Ib lub txiv qaub kiln yog cov qauv siv los tsim cov txiv qaub (calcium oxide) los ntawm kev hlawv calcium carbonate ntawm qhov kub siab tshaj 900 ° C. Cov calcium carbonate hlawv (los yog 'calcined') feem ntau yog limestone lossis chalk, tab sis qee zaus lwm cov ntaub ntawv xws li oyster lossis qe plhaub tau siv.
txiv qaub siv li cas rau xyoo 1800?
1800 A. D. Txiv qaub tau dav siv thoob plaws Tebchaws Europe raws li a plaster thiab xim décor, thiab nws tau ua haujlwm tseem ceeb hauv tsev rau tsev.
Ob txiv qaub qhov cub ua haujlwm li cas?
Txoj dome-zoo li txheej txheej ntawm limestone thiab ntoo lossis thee tau tsim nyob rau hauv kiln ntawm grate bar hla qhov muag. Thaum thauj khoom tiav, lub qhov cub tau muab tso rau hauv qab, thiab qhov hluav taws kub maj mam kis mus rau sab saud los ntawm tus nqi. Thaum hlawv, cov txiv qaub tau txias thiab raked tawm hauv lub hauv paus.
lub cub tawg siv rau dab tsi?
Kiln, qhov cub rau tua, ziab, ci, tawv, lossis hlawv cov khoom, tshwj xeeb tshaj yog cov khoom av nplaum tab sis thaum chiv keeb kuj tseem nplej thiab zaub mov. Lub cib kiln yog ib qho tseem ceeb ua ntej hauvthev naus laus zis thaum ub vim nws muab lub cib kom muaj zog dua li cov khoom siv hnub ci thaum ub.
Pom zoo:
Puas yog cov dab dab dab dab dab dab dab dab dab dab dab dab?
Myth: Ib tug dab tshos tsis yog neeg ncaj ncees yog tiasnws haum yog. Fact: Tu siab, qhov no yog ib lo lus tsis tseeb uas tau raug perpetuated los ntawm aversive trainers. Txawm hais tias haum rau lub caj dab kom zoo khawb rau hauv cov tawv nqaij rhiab nyob ib ncig ntawm lub caj dab, uas ua rau muaj kev puas tsuaj loj rau cov thyroid, esophagus, thiab trachea.
Puas cov txiv qaub tsis qab saj zoo li txiv qaub?
Yog tias koj tso txiv qaub rau tsob ntoo kom txog thaum nws siav tag nws yuav tig daj ntau zaus, yog vim li cas qee cov neeg xav tias txiv qaub tsuas yog txiv qaub tsis tau siav. Lawv tsis yog. Limes muaj ntau dua qhov iab hos txiv qaub yog qaub.
Yuav ua li cas txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau pom kev pom?
Txawm li cas los xij, corneal collagen cross-linking - cov txheej txheem qib siab tau pom zoo los ntawm US Food and Drug Administration (FDA) hauv xyoo 2016 - tuaj yeem txhim kho qhov pom kev hauv cov neeg mob txhua hnub nyoog. Corneal collagen cross-linking (CXL) tsis yog kho rau keratoconus, tab sis nws tuaj yeem pab tiv thaiv tus mob kom tsis txhob mob hnyav.
Lub txiv qaub kiln siv rau dab tsi?
Ib lub txiv qaub kiln yog siv los tsim cov kua qaub quicklime Txiv qaub yog cov calcium uas muaj cov ntxhia hauv cov ntxhia hauv feem ntau ntawm oxides, thiab hydroxide, feem ntau yog calcium oxidethiab / lossis calcium hydroxide. Nws kuj yog lub npe rau calcium oxide uas tshwm sim raws li ib yam khoom ntawm cov hluav taws kub-seam hluav taws thiab nyob rau hauv altered limestone xenoliths nyob rau hauv volcanic ejecta.
Puas yog cov dab dab dab dab dab dab tau them?
OHL cov neeg ua si tsis tau nyiaj hli, vim lawv tsis raug lees paub tias yog cov neeg ua haujlwm raws li Txoj Cai Kev Ua Haujlwm. Txawm li cas los xij, lawv suav nrog cov txiaj ntsig xws li nyiaj rov qab txhua xyoo, tag nrho cov nqi kawm ntawv them, thiab daim pib pub dawb.
