Npuag expansion thiab oxygen Flare Melting

Pa los yog cov pa-hnyav flare melting (KVP los yog CDF) txoj kev yog ib hom autogenous flash smelting sulfide tooj liab concentrates, nqa tawm nyob rau hauv ncua kev kawm ntawv. Cov yam ntxwv tseem ceeb ntawm txoj kev no yog siv raws li kev oxygen tshuab thiab hlawv sulfides kab rov tav plume thiab compensator daim ntaub.

Txheej txheem INCO (DPC) originated feem ntau raws li ib tug txhais tau tias ntawm cov kua leej faj dioxide ntawm lub hnub sis plawv hniav thiab cov ntawv kev lag luam nyob rau hauv qhov kev ntawm tooj liab sulphide concentrates. Autogenous smelting kev siv ib tug coj mus muag teev raws li ib tug oxidant ntshiab oxygen txheej txheem (95% O2) yog nqa tawm ntawm lub Hoobkas 1953 Tooj Pob tsuas nyob rau hauv Canada. Ib tug zoo xws li cov txheej txheem tau tsim nyob rau hauv lub Soviet Union thiab qhia nyob rau lub tooj liab cog rau hauv Almalyk (Uzbekistan). Lub ntsiab sib txawv los ntawm CFP PVP yog hais tias lub shredded thiab qhuav muab yuav paib heev mus rau hauv lub cub tawg los ntawm lub burner MAAs nyoos qhia horizontally (ntsug ncej melting offline) thiab siv ntshiab oxygen li tus txheej txheem ntawm oxidative moj tej tawg. smelting txheej txheem yog nqa tawm mus nrhiav tau ib tug matte 45-55% (thaum tau txais ib tug richer matte vim ntau heev tshav kub qhov cub overheats). Lub pov tseg gases muaj txog li 80% SO2. Zeem muag rau ib tug broad muaj daim ntawv thov txheej txheem muaj INCO.

Qhov tseem ceeb tshaj hauj nta CFP yog: muaj nyob rau hauv cov kab rov tav nplaim taws cub tawg tsub kom qhov chaw nyob lub sij hawm ntawm tus hais nyob rau ntawd, uas yuav tsum tau nyob rau hauv kev tshawb xav txhawb lub oxidation intensification hais ua batch dab, raws li tau zoo raws li cov cua kub thiab cov ntaub so ntswg compensators; tsawg tau regulating cov neeg kawm ntawv ntawm desulfurization nyob rau hauv cov kev taw qhia ntawm nws nce, thiab cov impossibility ntawm muab matte nrog ib tug tooj liab cov ntsiab lus ntawm 65-70% vim yog lub paug nyob rau hauv cov ntaub ntawv no ib tug loj npaum li cas ntawm tshaj thaum tshav kub kub thiab nyiaj qhov kub nyob rau hauv lub cub tawg rau 1550-1600 ° C, thiab ntxiv, li no ruaj kom txhob muaj kuj ntawm lub refractory brickwork; lub impossibility rau tib yog vim li cas ib tug tseem ceeb nce nyob rau hauv ntau lawm tus nqi ntawm lub smelting cub tawg; me me volume tau thaum lub sij hawm smelting leej faj-nplua nuj gases, lub theoretical cov ntsiab lus ntawm SO2 uas yuav ncav cuag 90-95%. Thaum lub CFP siv pulverulent concentrate yog nkag tau rau hauv ib tug burning cua sov qhov chaw kev oxygen dav hlau los ntawm Kompenz Elastic, uas ua rau yus mus rau tsim ntawm hmoov av thiab cov pa roj plume, nyob rau lub oxidized thiab melted cov ntaub ntawv. Tus txheej txheem ntawm tsim ntawm lub qhuav nyob rau hauv da dej cub tawg delaminated rau matte thiab slag. Mloog zoo lub qhuav finely dispersed nyob rau hauv lub ntoos sib xyaw nrog fluxes kab rov tav dav hlau tshuab tshwj xeeb burner nplaim taws nyob rau hauv lub cub tawg. Physico-tshuaj cov kev sib tshuam ntawm lub Cheebtsam ntawm lub nra tshuab pa txaus nyob rau hauv cov hmoov av khiav. Ncos tso los ntawm plume qhuav nyob rau hauv lub qab ntawm lub cub tawg thiab tsim tau ib cov kua da dej.

Cov nram qab no qhov chaw yog tsim nyob rau hauv lub cub tawg CFP:

- xwb-pa teeb, qhov chaw uas cov oxidation uas sulphide tshwm sim cov thiab slagging dab shteyno- (I);

- slag da dej nto, nyob rau lub flux thiab thaum kawg nqis tshua ntawm kev sis raug zoo ntawm sulfides nrog oxides (II);

- Stein-slag da dej, qhov chaw uas lub haujlwm cov txheej txheem thiab slagging shteyno- (II, III).

- ntaub expansion pob qij txha

CFP cub tawg xwb muaj tooj liab concentrate thiab quartz. Cov sib tov twb lim, thiab ib ya cov ntsiab lus ntawm 12-16% nyob rau hauv ib tug nruas qhuav mus rau ib tug residual concentration ntawm 4-7%, thaum thov compensators. Qhov thib ob kom qhuav kauj ruam yog nqa tawm nyob rau hauv ib ntsug tshuab yeeb nkab, qhov tsawg dua qhov uas ua hauj lwm pab kub gases, rhuab mus 400-500 C ntawm tus nqi ntawm 12-14 m / s. Kawg humidity ntawm 0.1-0.5%, dryers kawm concentrate yog 80-85 m / hr, los ntawm ib tug tshem tau dej mus rau 4 t / h.

High ceev oxidative dab proportional theem chaw hu, complicates lub hloov thiab thermal muaj pes tsawg leeg matte smelting hom. Kev npaj richer matte tau nyob rau hauv lub tsim ntawm tshaj thaum tshav kub kub thiab ua hnav hauv ob sab phlu. Rau thermal tswj ntawm tus txheej txheem nyob rau hauv cov ntaub ntawv no nws yog tsim nyog los txo lub peev xwm ntawm lub tsev ntawm lub concentrate. Yuav kom nce lub kuj meem kessoniruyut koov thiab lub cub tawg phab ntsa yog ua circulating khoom (hmoov av, converter slag), yog li mus pab tau txoj lub tooj liab cov ntsiab lus ntawm cov matte tsis muaj ib qho kev nce nyob rau hauv thermal kev nyuaj siab nyob rau hauv lub rooj sib txoos thiab compensators cov ntaub so ntswg.

CFP cub tawg masonry ua los ntawm bricks thiab compensators hromomagnezitovogo Kompenz-Elastic. Lub gases los ntawm lub cub tawg los ntawm lub flue nyob rau hauv qhov chaw ntawm ib tug combustion chaw unit. Raws li cov pa tshuab txheej txheem yog siv nrog ib tug cov ntsiab lus ntawm 95-98 vol. %. Stein, muaj 40-50% tooj liab, yog tawm los ntawm qhov nyob rau hauv thoob Siphons. Slag yog poured los ntawm cov taphole nyob rau hauv lub slag, thiab yog xa mus rau nkim. Rauv gases thiab hmoov av los ntawm qhov ncaj kev twb kev txuas mus rau lub flue roj txias. Plua plav tawm ntawm txog 10% los ntawm qhov hnyav ntawm sib tov. Plua plav gases 300-400 g / m≥ nkag mus rau qhov rov qab boiler thiab nyob rau hauv nws qhov hluav taws xob - 200-250 g / m≥.

CFP kuj yuav ntse siv rau cov kev ntawm Cu-Zn-, Cu-Ni- li al. Sulphide concentrates.