(中南大學(xué)資源加工與生物工程學(xué)院， 長沙 410083)
摘 要: 采用還原磨選法制得的富鈦料TiO2品位低， 不適合直接作生產(chǎn)氯化法鈦白和海綿鈦的原料。 熱力學(xué)分析表明， 采取添加Na2CO3進(jìn)行焙燒處理后， 可破壞富鈦料中主要礦物組分黑鈦石(Me3O5型固溶體， Me=Ti、 Fe、 Mg、 Mn等)的固溶體結(jié)構(gòu)， 使固溶于其中的雜質(zhì)元素鐵和鎂等轉(zhuǎn)變?yōu)橐兹苡谙←}酸的物質(zhì)。 結(jié)果表明， 用稀鹽酸浸出活化富鈦料可使浸出產(chǎn)物TiO2品位提高到90％以上， 比直接用稀鹽酸浸取未經(jīng)活化的富鈦料浸出產(chǎn)物TiO2的品位提高了近10%。
關(guān)鍵字: 富鈦料； 活化焙燒； 酸浸
HUANG Zhu-cheng, DONG Hai-gang
（ School of Resources Processing and Bioengineering, Central South University, Changsha 410083, China）
Abstract: The grade of TiO2 for titanium slag produced by reduction-grinding separation was low and the TiO2 was not suitable for preparation of pigment and sponge titanium. Thermodynamic analysis shows that solid solution of anosvite(Me3O5) in titania feedstock is damaged and the impurities (Fe, Mg, Ca, etc) dissolve into solution by dilute hydrochloric acidic after activated roasting with addition of Na2CO3. The results show that the grade of TiO2 in the leached product of activated titania feedstock is over 90%.Comparing activated titania feedstock with non-activated titania feedstock, the TiO2 grade of the latter is improved by about 10% with dilute hydrochloric acid.
Key words: titanium slag; activated roasting; acid leaching
