(中南大學(xué) 資源加工與生物工程學(xué)院，長沙 410083)
摘 要: 針對傳統(tǒng)石煤提釩工藝中釩回收率低、環(huán)境污染嚴(yán)重等問題，在工藝礦物學(xué)研究的基礎(chǔ)上，采用浮選的方法對含釩石煤礦進(jìn)行條件實(shí)驗(yàn)和閉路實(shí)驗(yàn)，設(shè)計(jì)出提釩浮選流程，并利用分子動力學(xué)模擬研究捕收劑分子在礦物解理面的吸附過程。結(jié)果表明：石煤中主要含釩礦物為釩云母，主要的脈石礦物為石英；通過閉路浮選實(shí)驗(yàn)，得到了五氧化二釩品位為3.20%(質(zhì)量分?jǐn)?shù))、回收率為74.50%的釩精礦；捕收劑分子容易在釩云母(001)面發(fā)生吸附，而在石英(001)面幾乎不吸附，從而實(shí)現(xiàn)了石煤中釩云母和石英的浮選分離。
關(guān)鍵字: 石煤；釩云母；浮選；分子動力學(xué)模擬
（School of Mineral Processing and Bioengineering, Central South University, Changsha 410083, China）
Abstract:In order to avoid the problems of pollution and low recovery in the conventional process, the flotation was adopted in the treatment of stone coal containing vanadium before leaching on the basis of mineralogical analysis. The proper flotation route was proposed based on condition experiments and closed-circuit test. The method of molecular dynamics simulation was used to study the adsorption process of the collector on roscoelite and quartz, providing a fundamental understanding of the flotation mechanism. The results show that the primary vanadium mineral in stone coal is roscoelite, while the main gangue is quartz. Roscoelite concentrate is eventually obtained with V2O5 grade of 3.20% (mass fraction) and the recovery of 74.50% by a flotation closed-circuit process. The collector is easy to be adsorbed on the surface of roscoelite (001), while hardly on that of quartz (001), which leads to the flotation separation of roscoelite and quartz in stone coal.
Key words: stone coal; roscoelite; flotation; molecular dynamics simulation
