论文部分内容阅读
自然金和银金矿是天然产出的含有金、银和少量铜的合金 ,它们最常见 ,是矿石中的金的主要产出形式。用重选、浮选或氰化法从含 0 1～ 2 0 g/tAu矿石中回收它们已工业化了。本文对有关自然金浮选出版物进行评述。对其它金矿物的回收稍有涉及 ,但是对自然金矿石的基质矿物 (如硫化铁矿物和贱金属硫化物 )也做了一些评论。金和银金矿产在不同类型的矿石中 ,其粒度范围广泛 ,从块金到细粒金 ( 0 1μm) ,甚至细到扫描电镜分辨率以下。浮选应用粒度范围为2 0 0～ 1μm。金和银金矿无捕收剂浮选是一个浮选理论问题 ,这个问题现在还未彻底解决。但是 ,在某些矿石浮选时确实不用捕收剂。了解金与捕收剂 (如黄药或黑药 )作用理论可以指导浮选实践。其作用可能包括黄药在金表面上吸附和黄药离子与氧发生电化学反应。在金浮选实践中影响其浮选的因素包括金粒的物理条件 (粒度、形状、局部组成变化、表面复盖膜 )、矿石的矿物组成 (黄铁矿、毒砂、贱金属硫化矿物和石英 )、干扰的矿物 (叶腊石、炭 )和非矿石物质 (水泥充填物、矿山木材和磨损的铁屑 )。浮选化学条件包括捕收剂 (黄药、黑药、巯基苯并噻唑、胺 )、起泡剂 (MIBC、Aerofroth)、活化剂 (硫酸铜 )、抑制剂 (石灰、氰化物、亚硫酸盐、硫化物、古尔胶 )、p
Natural Gold and Silver Gold is a naturally occurring alloy containing gold, silver and a small amount of copper, the most common of which is the major form of gold in the ore. It has been industrialized to recover them from 0 1 ~ 20 g / t Au ore by gravity separation, flotation or cyanidation. This article reviews natural gold flotation publications. The recovery of other gold minerals is slightly involved, but some comments are made on the matrix minerals of natural gold ores such as iron sulfide minerals and base metal sulfides. The gold and silver gold minerals are found in different types of ores with a wide range of grain sizes, from lump gold to fine grain gold (0 1 μm), even down to SEM resolution. Flotation particle size range of 200 ~ 1μm. Gold and silver gold collector flotation is a flotation theory, the problem is not yet completely resolved. However, there is indeed no need for collectors in the flotation of some ores. Understanding the theory of action of gold and collectors (such as xanthate or black drug) can guide flotation practices. Its role may include the adsorption of xanthate on the gold surface and the xanthate ion-electrochemical reaction with oxygen. Factors influencing flotation in gold flotation include the physical conditions of the gold particles (size, shape, local composition change, surface coverage), the mineral composition of the ore (pyrite, arsenopyrite, base metal sulphide minerals and Quartz), interfering minerals (pyrophyllite, charcoal) and non-ore substances (cement fillings, mine timber and worn iron filings). Flotation chemistries include collectors (xanthate, black drug, mercaptobenzothiazole, amine), foaming agent (MIBC, Aerofroth), activator (copper sulfate), inhibitors (lime, cyanide, sulfite , Sulphide, guer gum), p