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Trans. Nonferrous Met. Soc. China 28(2018) 775-782 Comparative kinetic analysis of conventional and ultrasound-assisted leaching of scheelite by sodium carbonate Jin-hong YANG, Li-hua HE, Xu-heng LIU... of scheelite was studied, and the corresponding kinetic equations were established. The results indicate that the obtained apparent activation energy with or without ultrasound is same 72 kJ/mol, and both......
称轴与晶轴c平行,在c轴方向是一个被压扁的四面体,另外,2个二次对称轴与晶轴a,b相交45°,沿水平方向分布.白钨矿为离子晶体,其中的W原子与O原子以WO4四面体存在,W-O原子间不容易发生解离；而Ca2+相对容易从矿物晶体中解离,活泼性较高. 图1 白钨矿单晶胞模型图 Fig. 1 Unite cell model of scheelite 图2所示为白钨矿(001)面...4.268 eV,属于绝缘体,晶体导电性较差. 图2 白钨矿(001)表面能带结构图和原子态密度图 Fig. 2 Band structure(a) and density of state of atoms in scheelite (001) surface(b) 图3 萤石(111)面能带结构图和原子态密度图 Fig. 3 Band......
; Al-Na2SiO3聚合物抑制剂对含钙矿物浮选行为的影响 图2 Pb-BHA配合物捕收剂体系下白钨矿,方解石和萤石的可浮性 Fig. 2 Floatability of scheelite, calcite and fluorite with Pb-BHA as collector (cPb=3×10-4 mol/L, cBHA=1.5×10-4 mol/L, φterpineol... Effect of Na2SiO3(a) and Al-Na2SiO3(b) polymer dosages on scheelite and calcite flotation (pH=9.0±0.1, cPb=3×10-4 mol/L, cBHA=1.5×10-4 mol/L, φterpineol=12.5 μL/L) 图4 硅酸钠与硫酸铝的质量比对白钨矿和方解石浮选回......
process of scheelite flotation in actual production 图2 pH对白钨矿低温浮选行为的影响 Fig. 2 Effect of pH on low-temperature flotation behavior of scheelite 2.1.2 油酸钠用量对白钨矿低温浮选行为的影响 图3所示为pH=10时油酸钠用量对白...二醇聚氧乙烯醚,直链十六醇聚氧乙烯醚. 图3 pH=10时油酸钠用量对白钨矿低温浮选行为的影响 Fig. 3 Effect of collector concentration on low-temperature flotation behavior of scheelite at pH=10 2.1.3 聚氧乙烯醚添加比率对白钨矿低温浮选行为的影响 固定油......
: The enhancing effect of nano-bubbles in ultrafine scheelite flotation was studied using a homemade nano-bubble generator based on the hydrodynamic cavitation. The effects of storage time, NaOl... cavitation; scheelite; flotation 纳米气泡是指尺寸在几百个纳米范围内的小气泡.大量的AFM观察和散射光实验[1-2]证实纳米气泡确实存在于液体和疏水固体界面上.通过空化作用产生纳米气泡是形成纳米气泡常见的方式之一.空化是指液体内局部压力降低时,液体内部或液固界面上气核的形成,发展和溃灭的过程[3].根据空化产生的方式,一般将其分为4类:水力空化,超声空化,光空化和粒......
; 文章编号:1672-7207(2018)08-1851-06 Influence of degassing on aggregation of ultra-fine scheelite particles CHEN Hao, OU Leming, ZHOU Weiguang (School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China) Abstract: The influence of degassing on aggregation of ultra-fine scheelite was studied through sedimentation test, Zeta potential measurement......
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heteropoly complexes and their derivatives[J]. Journal of the Chemical Society Chemical Communications, 1979, 17: 777-779. Behavior of accompanying rare earth during process of decomposing scheelite... to decompose rare earth minerals. The heteropoly acid can promote the decomposition of rare earth. When the mass fraction of WO3 and rare earths in scheelite are 26.11% and 0.13%, and the concentration......
floatabilities of calcium minerals and the huge difference between scheelite and wolframite have resulted in difficulties during their separation by flotation in Shizhuyuan Mine. In this study, novel collectors, lead complexes of benzohydroxamic acid(Pb–BHA),were introduced to modify the surface properties of scheelite and wolframite, thereby effectively and selectively improving floatability. The Pb–BHA......
High-pressure scheelite-type polymorph of SmCrO4: synthesis, structural characterization and magnetic propertiesRegino Sáez-Puche,Mahmoud Gamal Rabie,Julio Romero de Paz,José-Manuel Gallardo-Amores... scheelite form of SmCrO4 oxide was obtained by heating the zircon-type SmCrO4 oxide at 4 GPa and 803 K. X-ray diffraction revealed that this scheelite SmCrO4 phase crystallized with tetragonal symmetry......
