Siv ALUMINIUM CHROMIUM SLAG los tsim cov CHROMIUM-ZIRCONIUM CONDUM BRICKS rau cov hlau tsis muaj hlau SMELTIN

Refractories rau non-ferrous hlau kilns ua hauj lwm nyob rau hauv hnyav ib puag ncig, xws li fuming furnaces rau smelting lead, zinc, thiab tin, thiab refractories rau sab tshuab rauv. Cov kilns xav tau cov ntaub ntawv refractory nrog rau chav tsev kub compressive zog, yaig tsis kam, txo tsis kam thiab thermal shock kuj. Cov no tsis muaj nyob rau hauv thawj magnesia-chromium refractories. Aluminium chrome cib muaj qhov zoo ntawm kev ua haujlwm kub zoo, muaj zog yaig tsis kam, corrosion kuj, thiab lwm yam, thiab feem ntau yog siv rau hauv slag kab ntawm kiln hauv kev lag luam uas tsis yog-ferrous metallurgical. Txawm li cas los xij, cov khoom siv chromium slag refractories uas twb muaj lawm muaj teeb meem ntawm kev ua haujlwm tsis zoo los txo cov tshuaj tiv thaiv thiab thermal shock, uas tsis tuaj yeem ua tau raws li qhov yuav tsum tau muaj ntawm cov kiln.
Aluminium chromium slag yog cov khoom lag luam uas tsim thaum smelting metallic chromium. Nws cov theem tseem ceeb yog kev daws teeb meem ntawm -Al2O3 thiab Cr2O3. Tag nrho cov nyiaj ntawm Al2O3 thiab Cr2O3 nyob rau hauv cov tshuaj muaj pes tsawg leeg yog feem ntau ntau tshaj los yog sib npaug rau 90 feem pua ​​(w), uas yog ib tug ua tau zoo heev refractory khoom. Aluminium chromium slag tuaj yeem ua rau hauv chromium slag cib thiab siv nyob rau hauv kev ua hauj lwm hauv ob sab phlu ntawm non-ferrous kilns. Txawm li cas los xij, cov ntsiab lus ntawm impurities Na2O, Fe2O3, Si O2 thiab nws yog xim hlau Cr hauv aluminium chromium slag yog qhov siab thiab tsis ruaj khov, uas cuam tshuam rau nws cov nyhuv siv.
Hauv kev ua haujlwm no, aluminium-chromium slag, alumina, thiab low-chromium ore tau siv los ua cov khoom siv raw, thiab cov khoom siv aluminium-chromium re-synthesis sim tau ua los ntawm txoj kev hluav taws xob melting. Tom qab ntawd, chromium-zirconium corundum cib tau npaj los ntawm kev sib xyaw fused aluminium thiab chromium cov ntaub ntawv nrog fused zirconium mullite, tsom rau kev cuam tshuam ntawm tus nqi ntawm fused zirconium mullite ntawm thermal shock kuj ntawm chromium-zirconium corundum cib.
1 Synthesis test of fused aluminium chromium khoom
1.1 Cov khoom siv raw
Cov ntaub ntawv raw yog txhuas chromium slag, alumina hmoov thiab tsawg chromium ore nrog ib tug particle loj ntawm tsawg dua los yog sib npaug li 1 hli. Cov theem tseem ceeb ntawm txhuas chromium slag yog chromium corundum, -Al2O3 thiab nws yog xim hlau Cr. Cov tshuaj muaj pes tsawg leeg ntawm txhuas chromium slag thiab tsawg chromium ore txawv me ntsis nyob ntawm seb siv 300 k VA shelling hluav taws xob rauv thiab 6 300 k VA pov tseg hluav taws xob rauv.
1.2 Cov kev sim thiab cov txiaj ntsig
1.2.1 Kev ntsuas hluav taws xob melting ntawm 300 k VA shelling hluav taws xob rauv
Siv aluminium chromium slag, alumina hmoov, thiab tsawg chromium ore li raw cov ntaub ntawv, peb qhov kev xeem sib piv tau tsim. Sib tov cov khoom xyaw raws li qhov ntsuas piv thiab sib tov sib npaug. Noj li ntawm 1 000 kg ntawm qhov sib tov, muab tso rau hauv 300k VA shelling hluav taws xob rauv, thiab smelt ntawm 1 900-2 100 degree . Txhawm rau kom volatilize Na2O thiab lwm yam impurities thaum lub sij hawm smelting txheej txheem, sib txawv smelting thiab refining lub sij hawm yog tsim. Tag nrho ntawm 3 lub qhov cub tau sim, thiab lawv tau txias los ntawm ntuj txias nrog lub cub tawg. Kev soj ntsuam cov tsos ntawm frit, nws pom tias lub sab sauv thiab sab qis yog ntom, thiab lub slag core yog honeycomb-puab. Txhua tus qauv muaj me me ntawm cov hlau Cr. Xav txog cov nqi tsim khoom thiab cov khoom lag luam ua tiav, nws tau txiav txim siab tias cov khoom siv raw hauv qhov kev sim loj yog 3 #, lub sijhawm smelting yog 8 h, thiab lub sijhawm ua kom zoo dua yog ntau dua lossis sib npaug li 40 min.
1.2
Vim tias qhov ntsuas kub tsawg ntawm qhov kev sim me me hluav taws xob rauv, qhov cub me me lub cev thiab lub sijhawm tuav lub sijhawm luv, cov khoom siv honeycomb slag core nyob rau hauv nruab nrab ntawm cov khoom siv hluav taws xob melting yog ntau dua. Yog li ntawd, nyob rau hauv ib tug 6 300 k VA pov tseg hluav taws xob rauv ntawm 2 100 ~ 2 200 degree, ib tug loj batch ntawm raw khoom electrofusion synthesis xeem tau ua tiav. Cov txhuas chromium slag, alumina hmoov, thiab tsawg chromium ore nyob rau hauv Table 4 yog siv raws li raw cov ntaub ntawv, thiab peb yog batched raws li loj piv ntawm 12: 3: 5, thiab cov khoom siv yog 18 tons. Lub sij hawm smelting yog 8 h, thiab lub sij hawm refining yog ntau tshaj los yog sib npaug rau 40 min. Ncuav cov khoom siv electro-melted rau hauv lub hnab tau txais, thiab ntim nws tom qab cua txias rau 72 teev. Thaum smashing thiab xaiv, nws tau pom tias cov khoom nyob rau sab sauv, sab qis thiab ib ncig ntawm lub electrode yog qhov ntom ntom, tawv, thiab sib npaug; cov khoom nyob rau hauv nruab nrab ib feem muaj pores loj, tab sis qhov kev ntxhib los mos yog ib qho nyuaj; muaj me me ntawm carbon-muaj ferrochrome deposit nyob rau hauv qab.
Kev tshuaj xyuas tshuaj ntawm cov khoom siv fused aluminium thiab chromium yog nyob ntawm cov tshuaj muaj pes tsawg leeg ntawm cov khoom siv raw thiab qhov ntsuas qhov sib piv. Rau {{0}}.28 feem pua ​​(w), qhia tau hais tias txog 80 feem pua ​​ntawm Na2O volatilized thaum lub sij hawm smelting txheej txheem; Fe2O3 cov ntsiab lus poob los ntawm 6.3 feem pua ​​(w) thaum lub sij hawm batching rau 0.27 feem pua ​​(w) tom qab smelting; cov hlau Cr cov ntsiab lus hloov los ntawm batching Qhov 2.48 feem pua ​​(w) ntawm smelting yog txo rau 0.64 feem pua ​​(w) tom qab smelting. Tsuas yog ib feem ntawm cov hlau me me Cr oxidized rau Cr2O3, cov seem yog ferrochrome nrog Fe2O3 thiab nyob rau hauv qab ntawm lub pob tau txais. Cov ntsiab lus ntawm cov hlau Cr raug txo, uas tuaj yeem zam qhov nthuav dav thiab cov qauv xoob los ntawm oxidation ntawm hlau Cr thaum siv cov khoom sib xyaw. Nws tuaj yeem pom tau tias cov khoom siv hluav taws xob tuaj yeem tshem tawm cov impurities Na2O, Fe2O3, thiab Cr hauv cov khoom siv aluminium chromium slag raw khoom, thiab tau txais cov khoom siv aluminium chromium nrog qis dua Na2O thiab Fe2O3 cov ntsiab lus, yog li txhim kho cov kev ua haujlwm kub ntawm cov khoom siv. refractory npaj los ntawm nws.
2 Kev ntsuam xyuas ntawm kev npaj chromium-zirconium corundum cib nrog fused aluminium-chromium cov ntaub ntawv
2.1 Cov ntaub ntawv raw thiab cov qauv npaj
Cov ntaub ntawv xeem muaj xws li fused aluminium thiab chromium particles (particle loj ntawm {{{0}}}, 3-1, Tsawg dua los yog sib npaug li 1 hli) thiab hmoov zoo (tsawg dua los yog sib npaug rau 0.088mm) synthesized los ntawm cov saum toj no dumping rauv xeem, thiab fused zirconium mullite hais (particle loj ntawm 3- 1 hli), active -Al2O3 hmoov thiab phosphoric acid.
Sib tov cov khoom xyaw raws li qhov ntsuas qhov sib piv, thiab muab tso rau ntau tshaj 48 teev tom qab sib tov. Lub 630 t hluav taws xob ntsia hlau xovxwm tau siv los ua cov cib ntawm 230 mm × 114 mm × 65 mm, qhuav ntawm 80-100 degree rau 24 teev, thiab raug rho tawm haujlwm hauv 45 m3 shuttle kiln ntawm 1550 degree rau 22 teev.
2.2 Kev ntsuas kev ua tau zoo thiab cov txiaj ntsig
Ntsuam xyuas cov ntom ntom ntom, pom tseeb porosity, lub zog ntawm chav nyob thiab qhov pib kub ntawm cov qauv raws li cov qauv kev ua kom pom tseeb. Cov txheej txheem cua txias tau siv los ntsuas qhov thermal shock resistance. Cov qauv loj yog 114 mm × 40 mm × 40 mm, thiab thermal shock kub yog 950 degree (kub preservation 30 min). Tsuas yog rau qhov ntsuas kub ntawm qhov hnyav, txhua yam khoom raug kuaj ob zaug ua ke. Txhua qhov qauv muaj qhov sib txawv me me hauv cov ntom ntom, pom porosity sib txawv yog qhov sib txawv heev: feem pua ​​kev sib tw nrog firconium ntxiv ntawm 10 feem pua ​​(w) tus naj npawb ntawm cov cua sov ntawm tus qauv CZA-1 yog 56 thiab 51, thiab tus naj npawb ntawm thermal shocks ntawm tus qauv CZA-2 nrog rau qhov sib ntxiv ntawm 5 feem pua ​​(w) ntawm fused zirconium mullite yog 13 thiab 17, tsis muaj qhov sib ntxiv ntawm fused zirconium mullite. Tus naj npawb ntawm thermal shocks ntawm tus qauv CZA-3 los ntawm Laishi tsuas yog 4 thiab 5. Nws tuaj yeem pom tau tias thaum qhov sib ntxiv ntawm fused zirconium mullite yog 10 feem pua ​​(w), cua txias thermal shock kuj yog ho zoo dua li ntawm fused zirconium mullite nrog 5 feem pua ​​(w) thiab tsis muaj ntxiv.
3 Kev xaus
(1) Siv aluminium chromium slag, alumina hmoov, thiab tsawg chromium ore li raw cov ntaub ntawv, sib tov nrog ib tug loj ratio ntawm 12: 3: 5, smelting nyob rau hauv ib tug dumping rauv ntawm 2 000-2 200 degree rau 8 teev, cov tau fused. aluminium chromium khoom Cov qauv yog compact, thiab cov ntsiab lus ntawm impurities Na2O, Fe2O3, Si O2 thiab nws yog xim hlau Cr yog ho txo.
(2) Siv fused aluminium chromium pellets thiab hmoov zoo ua cov ntaub ntawv tseem ceeb, ntxiv 10 feem pua ​​​​fused zirconium mullite pellets (3 ~ 1 hli), thermal shock kuj ntawm cov npaj chromium zirconium corundum cib (950 degree, cua txias) nce mus rau 56 lub sij hawm, zoo thermal shock kuj.