Txoj kev agglomeration Qhov qhib qhov ncauj hluav taws xob rauv uas tuaj yeem txav tau ntawm txoj kev tsheb ciav hlau thiab sab sauv ntawm lub qhov cub lub cev tuaj yeem raug tshem tawm, thiab cov pa roj carbon siv los ua tus neeg sawv cev txo qis. Fine tungsten ore, asphalt coke (los yog roj av coke) thiab slagging tus neeg sawv cev (bauxite) tsim los ntawm kev sib xyaw ntawm tus nqi ntxiv rau lub cub tawg hauv ib nrab ib zaug, cov hlau ua kom zoo nyob rau hauv lub cub tawg feem ntau yog khov, nrog cov tuab ntawm qhov siab dua, qhov qis ntawm qhov gradual solidification. Lub tshuab hluav taws xob sib txuas tom qab nres lub qhov cub, rub lub tshuab hluav taws xob lub cev tawm, tshem tawm sab sauv ntawm lub tshuab hluav taws xob kom lub pob ntim. Tom qab ntawd tshem tawm cov agglomerates rau crushing thiab xov; tshem tawm cov npoo, nrog slag thiab cov khoom tsis tsim nyog rov qab mus rau qhov cub rau remelting. Cov khoom muaj li 80% tungsten thiab tsis ntau tshaj 1% carbon.
Iron extraction method yog tsim rau smelting ferro-tungsten uas muaj 70% tungsten nrog qis melting point. Silicon thiab carbon yog siv los ua reductants; Nws yog ua nyob rau hauv peb theem: txo (tseem hu ua slag depletion), refining thiab hlau extraction. Txo theem rauv muaj lub cub tawg kom coj cov hlau tso tseg tom qab lub slag uas muaj WO3 ntau dua 10%, thiab tom qab ntawd txuas ntxiv mus rau tungsten concentrate, thiab ntxiv rau silicon 75% ferrosilicon thiab me me ntawm asphalt coke (los yog roj av coke) rau txo smelting, yuav tsum tau slag muaj WO3 mus rau 0.3% hauv qab lub slag. Tom qab hloov mus rau theem refining, nyob rau lub sij hawm no, ntxiv tungsten concentrate, asphalt coke sib tov nyob rau hauv batches, ua hauj lwm nrog ntau dua voltage, nyob rau hauv ib tug ntau dua kub kom tshem tawm silicon, manganese thiab lwm yam impurities. Cov qauv kuaj los txiav txim seb qhov muaj pes tsawg leeg ntawm kev tsim nyog, pib coj hlau. Thaum lub sij hawm lub sij hawm rho tawm hlau, tungsten concentrate thiab asphalt coke tseem ntxiv kom tsim nyog raws li lub tshuab cua sov. Smelting zog noj txog 3,000 kW-hr / tuj, tungsten rov qab tus nqi ntawm txog 99%.
Aluminium thermal txoj kev thiaj li siv pov tseg tungsten carbide hmoov tungsten thiab cobalt sib cais ntawm cobalt extraction ntawm regenerated tungsten carbide, tsim ib tug txhuas thermal txoj kev ntawm ferro-tungsten txheej txheem, nrog regenerated tungsten carbide thiab hlau raws li raw cov ntaub ntawv, txhuas raws li ib tug reductant, siv cov tungsten carbide hauv nws tus kheej cov pa roj carbon thiab aluminium combustion ntawm cov cua sov, kom cov khoom siv raw hauv tungsten thiab hlau rau hauv ferro-tungsten, tuaj yeem txuag hluav taws xob ntau, thiab txo cov nqi. Nyob rau tib lub sij hawm, vim hais tias cov impurities nyob rau hauv raw cov ntaub ntawv tungsten carbide yog tsawg tshaj li cov nyob rau hauv tungsten concentrate, qhov zoo ntawm cov khoom yog siab tshaj li ferrotungsten siv tungsten concentrate li raw khoom. Tus nqi rov qab ntawm tungsten kuj siab dua li ntawm cov txheej txheem siv tungsten concentrate li raw khoom.
.png)
