Granulated blast-kuav slag: ntau lawm, muaj pes tsawg leeg, GOST

2024 Tus sau: Howard Calhoun | [email protected]. Kawg hloov kho: 2023-12-17 10:28

Granular blast-kuav slag yog pov tseg ntawm metallurgical ntau lawm. Yuav kom meej meej, qhov no yog cov khoom siv raw uas tseem tshuav tom qab smelting ntawm npua hlau nyob rau hauv blast furnaces.

slag yog dab tsi thiab nws tuaj qhov twg?

Yuav kom tsim cov khoom siv raw xws li npua hlau, qee yam khoom siv raw yuav tsum tau thauj mus rau hauv qhov cub tawg. Cov ntaub ntawv no yog hlau ore, flux pob zeb, coke. Thaum tawm ntawm lub qhov cub, tsuas yog ob yam khoom tau txais - qhov no yog npua hlau thiab slag. Cov muaj pes tsawg leeg ntawm lub tshuab hluav taws xob slag suav nrog cov khoom xws li quartz, aluminium oxides (ua los ntawm hlau ore), calcium thiab magnesium oxides (khoom siv los ntawm cov pob zeb flux). Lub molten slag tau txais ntawm qhov hluav taws xob ntawm qhov hluav taws xob qhov cub hluav taws xob tuaj yeem muaj qhov kub ntawm 1500 degrees Celsius, thiab qee qhov ntau dua. Lawm, txias ntawm cov khoom yuav tsum tau. Tam sim no, cov nroj tsuag tsuas yog siv 4 lub ntsiab ntawm kev tawg-rhaub slag ua.

• Thawj txoj hauv kev suav nrog kev ua kom txias cov khoom siv nrog dej txias. Qhov kev ua haujlwm no tseem hu ua slag swelling.
• Txoj kev thib ob siv qhov txiastshuaj nrog kev pab ntawm huab cua.
• txoj kev thib peb yog crushing.
• Plaub - sib tsoo.

Cov khoom siv tseem ceeb thiab cov txiaj ntsig ua tiav

Nws yog ib qho tseem ceeb uas yuav tsum nco ntsoov ntawm no tias qhov kev xaiv ntawm txoj kev ua blast-kub slag yuav txiav txim siab seb yam khoom twg yuav tau txais thaum kawg, thiab nws yuav muaj dab tsi. Txhua txoj kev qhia tshwj xeeb zoo rau cov khoom siv raw. Lwm qhov kev soj ntsuam tseem ceeb yog tias cov oxides tseem ceeb uas yog ib feem ntawm cov slag - oxides ntawm magnesium, calcium thiab aluminium, tsis tshwm sim hauv cov xwm txheej hauv daim ntawv dawb. Hauv lwm lo lus, lawv tsis muaj nyob, thiab lawv tsuas yog tuaj yeem tau los ntawm kev ua cov slag thiab hlau ore hauv lub qhov cub tawg. Ntxiv nrog rau cov oxides tseem ceeb, cov khoom muaj xws li manganese, hlau thiab sulfur compounds, quartz.

Piv txwv li, yog tias koj xav kom txias cov khoom siv nrog huab cua, ces qhov sib xyaw ntawm lub qhov cub tawg yuav yog kwv yees li hauv qab no: silicates thiab aluminosilicate cov ntaub ntawv xws li wolastonite, melilite thiab merwinite.

txheej txheem granulation li cas?

Cov txheej txheem ntawm granulation ntawm ib yam khoom yog nqa tawm los ntawm txoj kev ua kom txias sai ntawm cov khoom siv raw. Nws yog ib qho tseem ceeb uas yuav tsum tau ntxiv ntawm no tias qee zaum cov txheej txheem crushing yuav raug ntxiv, txawm tias tseem ua kua slag, lossis twb tau ua ib nrab. Lub hom phiaj tseem ceeb ntawm txoj haujlwm no yog ua cov khoom loj rau hauv cov nplej me me uas yuav yooj yim dua rau kev ua haujlwm yav tom ntej, nrog rau kev txhim kho zoo li kev ua haujlwm hydraulic. nwsKev ua haujlwm tseem ceeb heev, vim tias cov cuab yeej no yog qhov tseem ceeb tshaj plaws, vim tias slag tuaj yeem siv los ua cov khoom siv rau slag cements, thiab tuaj yeem ua raws li cov khoom ntxiv rau Portland cement.

Koj yuav tsum nkag siab tias tsis muaj kev tsim tshwj xeeb ntawm cov tshuab hluav taws xob ua hluav taws xob li ntawd. Nws tsuas yog tau los ntawm kev ua cov ore thiab lwm yam khoom hauv lub qhov cub tawg.

Txoj kev ntawm granulation

Koj yuav tsum paub tias rau granulation ntawm cov khoom pov tseg, uas yog, slag, muaj ntau txoj hauv kev, nrog rau cov khoom siv ua haujlwm no. Nyob ntawm seb cov dej noo ntawm cov slag tau txais thaum kawg, cov kev teeb tsa tau muab faib ua hom. Muaj units rau ntub thiab ib nrab qhuav granulation.

Yog tias txoj kev ntub dej granulation yog ua tiav, ces cov slag loaded rau hauv lub thoob slag hauv daim ntawv kub yog pub rau cov pob zeb ua pob zeb uas muaj dej. Tom qab ntawd, los ntawm cov ladles nws sib koom ua ke rau hauv cov pas dej ua ke los ntawm cov gutters tshwj xeeb. Ib qho txiaj ntsig me ntsis ntawm txoj kev yog tias cov pas dej tau muab faib ua ob peb ntu. Qhov no tso cai rau cov txheej txheem txias kom ua tiav yuav luag tsis tu ncua. Thaum cov khoom kub kub kub sib koom ua ke rau hauv ib ntu, qhov uas twb tau txias rau hauv qhov cub tawg tuaj yeem raug tshem tawm ntawm lwm qhov tib lub sijhawm. Rau kev xa khoom ntawm cov khoom siv raw, cov chaw tsim khoom muaj clamshell cranes uas xa ncaj qha mus rau cov tsheb ciav hlau qhib. Tom qab ntawd, cov slag raug xa mus rau lub tsev rau khoom lossis ncaj qha rau cov neeg siv khoom.

Cov ntsiab lusnoo noo

Nws yog ib qho tsim nyog yuav tsum tau sau tseg ntawm no tias cov dej noo ntawm cov khoom nyob ntawm qhov hnyav tag nrho ntawm lub qhov cub tawg slag uas dhau los ntawm cov txheej txheem granulation. Hauv lwm lo lus, qhov ntxeem tau ntau dua cov qauv ntawm cov nplej, qhov ntau noo noo nyob hauv lawv. Qhov tsim ntawm pores nyob rau hauv lub solidified granular slag tshwm sim vim qhov kev txiav txim ntawm gases. Cov tshuaj volatile no muaj nyob rau hauv cov khoom siv molten thiab pib evaporate thaum qhov kub ntawm cov slag txo qis, uas yog, thaum nws txias. Txawm li cas los xij, nws yog ib qho tseem ceeb uas yuav tsum nco ntsoov ntawm no tias qhov txias thiab solidification ntawm cov khoom tshwm sim sai heev uas cov roj tsis muaj sij hawm evaporate los ntawm slag. Nws tseem nyob hauv daim ntawv ntawm cov npuas me me, uas tsim cov qauv ntxeem tau ntawm cov nplej. Porosity, thiab vim li no, cov ntsiab lus noo noo ntawm slag kuj ncaj qha nyob ntawm seb cov xwm txheej uas siv ncaj qha rau hauv cov txheej txheem ntawm txias lub slag. Ntawd yog, tsis tsuas yog qhov kawg tshwm sim, tab sis kuj tus qauv nws tus kheej nyob ntawm kev xaiv txoj kev.

Semi-dry method

Semi-qhuav slag yog tau los ntawm kev siv cov txheej txheem ntawm kev sib tsoo, nrog rau pov rau hauv huab cua ua ntej txias, tab sis tib lub sijhawm tseem tsis tau khov slag. Yog li, cov qauv ntawm cov khoom hloov mus ua ntau denser, uas ua rau kom lub cev hnyav li ntawm ib thiab ib nrab zaug, piv nrog rau qhov hnyav uas cov slag yuav muaj yog tias nws dhau los ntawm ntub granulation, muaj tib yam nqi pib ntawm. yam khoom. Yog tias peb tham txog cov yam ntxwv zoo li cov av noo, tom qab ntawd rau cov ntaub ntawv ntub dej no tus nqi yog nyob rau hauv thaj tsam ntawm 15 txog 35%, heev.tsis tshua muaj 10%. Thaum qhuav granulation yog nrog los ntawm slag ya raws li ntawm 5 mus rau 10%. Yog hais tias peb piv cov volumetric hnyav, ces nrog ib tug ntub txoj kev ntawm kev ua nws yuav nyob rau hauv lub cheeb tsam ntawm 400 mus rau 1000 kg / m, thiab nrog ib tug qhuav - nyob rau hauv thaj tsam ntawm 600 mus rau 1300 kg / m. Ntawm no nws tsim nyog ntxiv tias nrog qhov nce ntawm qhov kub thiab txias ntawm lub qhov cub tawg, qhov kawg qhov hnyav ntawm qhov cub tawg yuav txo qis.

Nws yog ib qho tseem ceeb ntxiv tias feem ntau cov chaw tsim khoom siv ntub dej granulation, txawm tias qhov tseeb tias txoj kev muaj ob peb qhov tsis zoo:

• siv roj ntau rau ziab cov khoom ua ntej nws tawg.
• Kev tsim khoom ntawm cov khoom siv slag qhuav yog qis.
• Txias ntub cov slag hauv cov tsheb thauj khoom, tsev khaws khoom thiab lwm qhov chaw cia rau lub caij ntuj no.

Blast furnace slag GOST 3476-74

Tus qauv no piav qhia txhua yam kev xav tau, kev sim thiab cov cai lees paub, nrog rau cov txheej txheem khaws cia thiab thauj cov khoom tawg rau qhov cub slag. Ib qho ntawm cov ntsiab lus ntawm lub xeev cov ntaub ntawv cuam tshuam txog cov dej noo ntawm cov khoom siv raw. Nws tau hais tias qhov feem pua ntawm cov av noo yuav tsum ua raws li qhov tau pom zoo los ntawm cov neeg siv khoom thiab cov khoom muag. Hauv lwm lo lus, nws tuaj yeem hais tias tus neeg siv khoom xaiv cov khoom siv granulation txoj kev.