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本文主要论述矿物的晶体缺陷与其浮游性之间的关系,首先对晶体所表现的形式作了简要的介绍。 通过对方铅矿、闪锌矿、墨铜矿和钛铁矿的研究,认为: 1.方铅矿中Ag和Bi含量的增加,晶格常数随之减小而矿物表面的疏水性则有所增强。 2.闪锌矿中含铁量增加时,由于离子键数量的增加将导致用黄酸盐化捕收剂浮选时的回收率下降。 3.墨铜矿为层状矿物,是由两种层(氢氧镁石层和硫化物层)交插堆积而成,形成特殊的结构名为“杂化结构”。其分子式为(CuFeS_2)_n[MS·Al(OH)_2],式中n为可变值;当两层严格按相间排列时,n=1.526。我国寿王坟墨铜矿的n值,一般均大于1.526,这是由于层的无序堆积所致,即氢氧镁石层多于硫化物层,通过俄歇能谱进行表面成分的测定,亦得到证明。这也是墨铜矿的浮游性区别于其它金属硫化物的原因。 4.由于酸对钛铁矿表面FeO的溶解,就形成了表面的人工缺陷,与此同时,其不饱和阳电荷以及表面浮游活性质点钛密度的增加,有利于药剂与矿物的作用,最终导致钛铁矿浮游能力的显著提高。
This paper mainly discusses the relationship between mineral crystal defects and its floatability. Firstly, the crystal forms are briefly introduced. By studying galena, sphalerite, cupro and ilmenite, it is considered that: 1. The increase of Ag and Bi content in galena decreases the lattice constant and the hydrophobicity of mineral surface Enhanced. 2. When the amount of iron in the sphalerite increases, the recovery of the sorbent with the yellowing collector decreases as the number of ionic bonds increases. 3. The cuprite is a layered mineral, which is formed by the intercalation and stacking of two kinds of layers (the ferratumite layer and the sulfide layer), forming a special structure called “hybrid structure.” The formula is (CuFeS_2) _n [MS · Al (OH) _2], where n is a variable value; when the two layers are strictly arranged in phase, n = 1.526. The n value of the Shouwangfu copper-copper mine in China is generally greater than 1.526, which is attributed to the disordered deposition of the layers, that is, the magnesia layer is more than the sulfide layer, and the surface composition is determined by Auger spectroscopy. It has also been proved. This is why the flotation of the copper deposits is distinguished from other metal sulfides. 4. Due to the acid dissolution of the FeO on the ilmenite surface, artificial defects on the surface are formed, and at the same time, the increase of the unsaturated positive charge and the density of titanium on the surface of the planktonic active particles is beneficial to the effect of the agent and the mineral, Ilmenite significant increase in the ability to float.