摘要
本研究采用红外光谱、俄歇电子能谱、X 射线光电子能谱、X 射线衍射等手段测定了白铅矿、菱锌矿硫化表面产物.结果表明,白铅矿经硫化剂作用后,其解离表面存在 PbS、PbSO_4和碱式碳酸盐.这些化合物并非单纯以化学吸附的方式存在,还可通过 S^(2-)离子与 CO_3^(2-)离子发生交换反应而进入晶格,在白铅矿表面形成了以 PbS 为主要成分的结晶膜.菱锌矿只有在加温硫化的情况下才能有效地形成以 ZnS 为主要成分的结晶膜.菱锌矿解离面上 CO_3^(2-)对 Zn^(2+)离子的屏蔽作用对其表面的硫化有一定的影响.
Products on the sulphurized surfaces of cerussite and smithsonite have been studied by means of infrared spectra,Auger electronic spectra,X-ray pho- toelectron spectroscopy and X-ray diffraction techniques etc.Results show that there are lead sulphide,lead sulphate and subcarbonate on the liberated surface of cerussite after cerussite is sulphurized.These compounds not only exist in the way of chemical adsorption,but may come into the crystal lattices of minerals by the exchange reaction between S^(2-) and CO_3^(2-) ions.So crystalline film with large amounts of PbS is formed on the surface of cerussite.Only when smithsonite is thermally sulphurized can the crystalline film with ZnS as the main component be formed effectively.The shielding action of CO_3^(2-) to Zn^(2+) on the liberated surface of smith- sonite has a certain effect on its sulphurization.
出处
《广东有色金属学报》
1992年第2期83-88,共6页
Journal of Guangdong Non-Ferrous Metals
关键词
白铅矿
菱锌矿
硫化
表面性质
cerussite
smithsonit
sulphurization
liberated surface
crystalline film
