Kodi titaniyamu dioxide ndi chiyani?
Chigawo chachikulu cha titaniyamu woipa ndi TIO2, yomwe ndi yofunika inorganic chemical pigment mu mawonekedwe a woyera olimba kapena ufa. Ndiwopanda poizoni, imakhala yoyera kwambiri komanso yowala kwambiri, ndipo imatengedwa ngati pigment yabwino kwambiri yowongolera kuyera kwazinthu. Amagwiritsidwa ntchito kwambiri m'mafakitale monga zokutira, mapulasitiki, mphira, mapepala, inki, zoumba, galasi, etc.
Ⅰ.Chithunzi chamakampani a Titanium dioxide:
(1）Kumtunda kwa makina a titaniyamu dioxide kumakhala ndi zopangira, kuphatikiza ilmenite, titaniyamu concentrate, rutile, ndi zina;
(2）Mitsinje yapakati imatanthawuza zinthu za titaniyamu dioxide.
(3) Kunsi kwa mtsinje ndiko malo ogwiritsira ntchito titaniyamu woipa.Titaniyamu dioxide chimagwiritsidwa ntchito m'madera osiyanasiyana monga zokutira, mapulasitiki, papermaking, inki, mphira, etc.
Ⅱ Kapangidwe ka kristalo wa titaniyamu woipa:
Titanium dioxide ndi mtundu wa polymorphous pawiri, yomwe ili ndi mitundu itatu yodziwika bwino ya kristalo m'chilengedwe, yomwe ndi anatase, rutile ndi brookite.
Zonse za rutile ndi anatase ndi za tetragonal crystal system, zomwe zimakhala zokhazikika pansi pa kutentha kwabwino; brookite ndi ya orthorhombic crystal system, yokhala ndi mawonekedwe osakhazikika a kristalo, kotero ilibe phindu pamakampani pakadali pano.
Pakati pazigawo zitatu, gawo la rutile ndilokhazikika kwambiri. Gawo la Anatase lidzasandulika kukhala rutile pamwamba pa 900 ° C, pamene gawo la brookite lidzasandulika kukhala rutile pamwamba pa 650 ° C.
(1) Rutile gawo titanium dioxide
Mu rutile gawo titanium dioxide, ma atomu a Ti ali pakatikati pa kristalo, ndipo maatomu asanu ndi limodzi a okosijeni ali m'makona a titaniyamu-oksijeni octahedron. Octahedron iliyonse imalumikizidwa ndi ma octahedron ozungulira 10 (kuphatikiza ma vertices asanu ndi atatu ogawana ndi m'mphepete ziwiri), ndipo mamolekyu awiri a TiO2 amapanga cell cell.
Chithunzi chojambula cha crystal cell ya rutile phase titanium dioxide (kumanzere)
Njira yolumikizira ya titanium oxide octahedron (kumanja)
(2) Anatase gawo titanium dioxide
Mu gawo la anatase titanium dioxide, titaniyamu-oxygen octahedron iliyonse imalumikizidwa ndi ma octahedron 8 ozungulira (4 kugawana m'mphepete ndi 4 kugawana vertices), ndi 4 TiO2 mamolekyu amapanga unit selo.
Chithunzi chojambula cha crystal cell ya rutile phase titanium dioxide (kumanzere)
Njira yolumikizira ya titanium oxide octahedron (kumanja)
Ⅲ.Kukonzekera Njira za Titanium Dioxide:
Njira yopanga titaniyamu woipa makamaka imaphatikizapo ndondomeko ya sulfuric acid ndi ndondomeko ya chlorination.
(1) Njira ya sulfuric acid
Njira ya sulfuric acid yopanga titaniyamu wothirira imakhudzanso acidolysis ya titaniyamu chitsulo ufa ndi sulfuric acid yokhazikika kuti ipange titaniyamu sulphate, yomwe imapangidwa ndi hydrolyzed kuti ipange metatanic acid. Pambuyo calcination ndi kuphwanya, mankhwala titaniyamu woipa amapezeka. Njirayi imatha kupanga anatase ndi rutile titanium dioxide.
(2) Njira ya chlorine
Njira ya chlorination yopanga titanium dioxide imaphatikizapo kusakaniza rutile kapena mkulu-titaniyamu slag ufa ndi coke ndiyeno kuchita kutentha kwambiri chlorination kupanga titaniyamu tetrachloride. Pambuyo pakutentha kwambiri, titanium dioxide imapezeka kudzera mu kusefera, kutsuka madzi, kuyanika, ndi kuphwanya. Njira ya chlorination yopanga titaniyamu woipa imatha kupanga zinthu za rutile.
Kodi kusiyanitsa zenizeni za titaniyamu woipa?
I. Njira Zathupi:
(1）Njira yosavuta ndiyo kufananitsa kapangidwe kake ndi kukhudza. Titaniyamu woipa wabodza amamveka bwino, pomwe titaniyamu woipa wowona amamva movutikira.
(2）Mwa kutsuka ndi madzi, ngati muika titanium dioxide m’dzanja lanu, yabodzayo ndiyosavuta kutsuka, pamene yeniyeniyo si yapafupi kuchapa.
(3）Tengani kapu yamadzi oyera ndikuponya titaniyamu woipa mmenemo. Yomwe imayandama pamwamba ndi yowona, pomwe yomwe imakhazikika pansi ndi yabodza (njira iyi siyingagwire ntchito pazinthu zosinthidwa kapena zosinthidwa).
(4）Onetsetsani kusungunuka kwake m'madzi. Nthawi zambiri, titaniyamu dioxide imasungunuka m'madzi (kupatula titanium dioxide yomwe imapangidwira mapulasitiki, inki, ndi titanium dioxide, yomwe imasungunuka m'madzi).
II. Njira zama Chemical:
(1) Ngati ufa wa kashiamu uwonjezedwa: Kuwonjezera hydrochloric acid kudzachititsa kuti pakhale phokoso lamphamvu ndi phokoso la phokoso, limodzi ndi kupanga mabulu ambiri (chifukwa calcium carbonate imachita ndi asidi kuti ipange carbon dioxide).
(2) Ngati lithopone wawonjezedwa: Kuonjezera sulfuric acid kapena hydrochloric acid kumatulutsa fungo la dzira lovunda.
(3) Ngati chitsanzocho ndi hydrophobic, kuwonjezera hydrochloric acid sikungayambitse. Komabe, mutatha kunyowetsa ndi ethanol ndikuwonjezera hydrochloric acid, ngati thovu limapangidwa, zimatsimikizira kuti chitsanzocho chili ndi ufa wa calcium carbonate.
III. Palinso njira zina ziwiri zabwino:
(1) Pogwiritsa ntchito njira yofanana ya PP + 30% GF + 5% PP-G-MAH + 0.5% titaniyamu woipa wa ufa, m'munsi mphamvu ya zinthu zomwe zimachokera, ndizowona kuti titaniyamu woipa (rutile) ndi yowona.
(2) Sankhani utomoni mandala, monga mandala ABS ndi 0.5% titaniyamu woipa ufa anawonjezera. Yezerani kufalikira kwake. M'munsi mwa kufalikira kwa kuwala, m'pamenenso ufa wa titaniyamu woipa umakhala wodalirika.
Nthawi yotumiza: May-31-2024
