Ion Flotation of Scandium

Scandium was recovered from dilute chloride solutions with potassium salt of saturated C_8～C_(12)fattyacids as surfactant by Ion flotation.The optimum comprehensive results of physical properties,stability andscandium concentration of the foam formed with potassium caprate CH_3(CH_2)_8 COOK can be obtained.Re-covery of scandium in the foam was 98% at pH 3.8～5.0 and 25～55℃.The experimental results of 0.3 L/minairflow rate was satisfactory for flotation column.It is of a great potential for using ion flotation technique toconcentrate scandium from dilute solutions.     

Effect and mechanism of diphosphonic acid on flotation characteristic of fersmite and intergrowth gangue

1　INTRODUCTIONThereservesofniobium containingmineralsinChinatakethesecondplaceintheworld ,anddis tributemainlyinBaiyuneboofInnerMongolia ,TaimeiofGuangdongProvinceandYichunofJiangxiProvince ,etc .Niobium containingmineralsweredis coveredover 130kinds ,butonlyafewofthemhadindustrialvalue .Fersmiteisoneoftheseveralvaluedindustrialniobium containingminerals[1,2 ] .Theprocessingofniobium containingmineralsistoodifficultduetotheirfinesizeandnumerousspeciesandcomplexcomposing .Inmiddleperi…     

浅论各种因素对铝土矿选矿浮选效果的影响

通过对铝土矿浮选效果的影响因素分析,探索矿浆浓度、矿浆的pH值、矿浆温度等因素对浮选效果的影响趋势,以期找到各因素的最佳临界点,从而提高浮选效果。     

高频红外吸收法测定银中的碳硫

作者采用高频红外吸收法同时测定Ag中的C和S,对试样的制备、助熔剂的选择、分析条件等进行了较详细的研究.方法快速、简便、灵敏度高,C、S的测定范围分别为0.002%～1%和0.002%～0.1%,对自己配制的合成样进行6次平行测定,其RSD分别为:C = 0.34%和S = 2.01%,C、S的回收率都在95%～105%,获得了满意的结果.     

DFT research on activation of sphalerite

Activation of sphalerite ZnS, (Zn, Fe)S, (Zn, Cu)S were carried out using the density functional theory (DFT) method. The electronic structures and related properties of three kind of zinc sulfide compounds were investigated. In addition, the relation between electronic structure and flotation behavior was discussed. The results show that, ZnS has a broader band gap than (Zn,Cu)S and (Zn,Fe)S do, and it has low electrochemistry activity to react with flotation collectors to render the surface hydrophobic. When the Zn atom in ZnS is replaced by Cu atom,the band gap will be reduced, and the top valence band will be occupied by Cu 3d orbit, thus it is beneficial to the interaction between mineral surface and collector.     

氯化钠对铝硅矿物浮选的影响及其作用机理

采用季铵盐DTAL作捕收剂,研究了氯化钠对一水硬铝石和叶蜡石浮选的影响及其作用机理.随着氯化钠浓度的增加,叶蜡石的浮选回收率显著提高,而一水硬铝石的可浮性受其影响很小.机理研究表明:氯化钠对一水硬铝石的zeta-电位没有影响,而能显著降低叶蜡石的zeta-电位,增强捕收剂与叶腊石的静电作用,促进捕收剂的吸附而活化其浮选;叶蜡石表面电位的降低是因为氯离子对叶蜡石存在选择性吸附作用并对其结构进行插层,使得叶蜡石的层间距从0.93 nm增大至1.40 nm.溶液化学计算表明:氯化钠改变溶液的离子强度,显著降低了季铵盐阳离子表面活性剂的临界胶束浓度,使得吸附了捕收剂的矿物表面更容易疏水上浮.     

FLOTATION MECHANISM OF FLUORITE AND HEMATITE WITH SODIUM NAPHTHENE SULFONATE

ＦＬＯＴＡＴＩＯＮＭＥＣＨＡＮＩＳＭＯＦＦＬＵＯＲＩＴＥＡＮＤＨＥＭＡＴＩＴＥＷＩＴＨＳＯＤＩＵＭＮＡＰＨＴＨＥＮＥＳＵＬＦＯＮＡＴＥ￥Ｇｅ，Ｙｉｎｇｙｏｎｇ；Ｑｕｅ，Ｘｕａｎｌａｎ（ＣｈａｎｇｓｈａＲｅｓｅａｒｃｈＩｎｓｔｉｔｕｔｅｏｆＭｉｎｉｎｇ...     

ROOM TEMPERATURE CLEANER FLOTATION TECHNIQUE FOR SCHEELITE ROUGH CONCENTRATE

ＲＯＯＭＴＥＭＰＥＲＡＴＵＲＥＣＬＥＡＮＥＲＦＬＯＴＡＴＩＯＮＴＥＣＨＮＩＱＵＥＦＯＲＳＣＨＥＥＬＩＴＥＲＯＵＧＨＣＯＮＣＥＮＴＲＡＴＥ①ＴｉａｎＸｕｅｄａＣｈｅｍｉｓｔｒｙ＆ＣｈｅｍｉｃａｌＥｎｇｉｎｅｒｉｎｇＣｏｌｅｇｅ，ＸｉａｎｇｔａｎＵｎｉｖ...     

难熔金属碳化物Cr_3C_2、VC、WC、TaC、NbC及Ti(C、N)粉中硫的测定

研究了燃烧──—电导法测定金属陶瓷添加剂Cr3C2；VC；WC；TaC；NbC及Ti（C、N）粉中硫的测定条件，建立了分析方法．方法相对标准偏差5％左右，仪器的灵敏度为3X10－6，最低检测限为1ppm．     

闪锌矿(110)表面离子吸附的动力学模拟

为了查清高碱电位环境对闪锌矿表面性质抑制作用的根本原因 ,采用C2 Soterware分子力场中的万能力场方法 ,对闪锌矿 (110 )表面CaOH 和OH-两种离子的吸附进行了动力学模拟 ,并对吸附能和吸附质量云图进行了分析。模拟结果表明 ,相对于OH-来说 ,CaOH 在闪锌矿 (110 )表面的吸附能更负 ,吸附量更大。由此可知 ,这些吸附在表面的离子又与OH-和硫化矿氧化产物产生的SO2 -4等离子作用形成不溶性亲水表面产物 ,从而导致矿物受到抑制 ,这也正是高碱电位调控成功的原因之一。