磁黄铁矿

After superimposition of magmatic mineralization, chert-bearing water-rich carbonates, such as dolomite, ankerite and/or calcite were turned into serpentitite-talcite; greite and pyrite into pyrrhotite.

经过岩浆叠加改造，底部的纹层状含燧石富水高镁碳酸盐岩变为蛇纹石岩；胶黄铁矿、黄铁矿大部分变为磁黄铁矿。

A new dressing technology, selective flotation separation of gold, and flotation separating pyrite from arsenopyrite with chlorinated lime as the oxidizing agent, and magnetic separation of pyrrhotite from arsenopyrite is adopted and good beneficiation indexes are achieved.

天马山矿矿石属含砷高硫难选金矿石，对该矿石进行了选矿工艺研究，采用优先浮选金、漂白粉作氧化剂氧化浮选分离黄铁矿和毒砂、磁选分离磁黄铁矿和毒砂工艺，综合回收金硫砷，取得较好选别指标。

The investigation on depressant s of pyrrhotite at home and abroad is reviewed in this paper.

本文概括了与磁黄铁矿浮选电化学有关的几个方面的研究情况和国内外对磁黄铁矿抑制剂的研究概况。

Metal minerals consist of major pyrrhotite, pentlandite, chacopyrite, violarite and pyrite, with minor millerite, niccolite, magnetite, ilmenite and galena.

矿体的形态产状：似层状矿体、似板状矿体、脉状矿体、纯硫化物脉状矿体、上悬透镜状矿体、主要金属矿物有磁黄铁矿、镍黄铁矿、黄铜矿、紫硫镍矿、黄铁矿；次要矿物：针镍矿、红砷镍矿、磁铁矿、钛铁矿、方铅矿等。

The flotation behavior of pyrrhotite was investigated by using sodium diethyldithiocarbamate as a collector.

考察了乙硫氮为捕收剂时磁黄铁矿的浮选行为，发现在pH2-12的范围内，磁黄铁矿均可表现良好的可浮性。

When pyrite is heated to 535℃～560℃, the Curie temperature of the newly formed pyrrhotite is not stable, and the Curie temperature of newly formed pyrrhotite may tend to be stable when pyrite is heated to above about 560℃.

在535℃～560℃的加热过程中生成的磁黄铁矿居里温度不稳定，直到加热至高于约560℃时才生成居里温度稳定的磁黄铁矿。

Research on ore deposit features indicates that the composition of different variety of pyrrhotite are similar to that of pyrrhotite in mantle conclusions, reflecting their mantle derivation.

矿床地质研究认为，本区不同磁黄铁矿变种与相应的地幔包体磁黄铁矿成分相近，反映出它们地幔来源的特点。

At present,the rate laws and reaction mechanisms of pyrite oxidation,pyrite and chalcopyrite formation,uraninite and magnetite dissolution in aqueous solutions are mainly studied,and it is discovered that (1)oxidation rate of pyrite controlled by surface reaction assume fractional dependence on Fe3+ and O2 molalities in acid solutions;(2)Pyrite cannot nucleate directly from solutions below 300 ℃,it can only form initially through sulfidation of a FeS precursor. The rate equation of reaction between FeS and H2S to form pyrite is of the second order;(3)Chalcopyrite is formed by reactions of pyrrhotite or pyrite with Cu2+,the former proceeds via a series of mediate metastable phases of Cu-Fe sulfide,whereas the rate equation of the latter is apparently of the first order which is controlled by surface reaction;(4)The nonlinear behavior of magnetite dissolution at acid pH can be represented by a shrinking core model coupling with surface reaction and diffusion transport.

目前主要研究了水溶液中黄铁矿氧化、黄铁矿和黄铜矿形成、晶质铀矿和磁铁矿溶解的速率定律和反应机理，发现：(1)酸性溶液中黄铁矿的氧化速率对Fe3+和O2浓度呈分数依赖并受表面反应的控制；(2)低于300 ℃时黄铁矿不能从溶液中直接成核，而需初始地通过FeS先驱物的硫化生成，FeS与H2S反应形成黄铁矿的速率方程为二级；(3)磁黄铁矿或黄铁矿与Cu2+反应均可形成黄铜矿，前者经历了一系列准稳的Cu-Fe硫化物的中间物，后者的速率方程为表观一级并受表面反应的控制；(4)酸性pH时磁铁矿的非线性溶解行为可采用表面反应扩散输运耦合的收缩核模型来描述。

The primary ores of the Laozuoshan gold deposit is a heavily disseminated and massive gold ores the main metallic mineral of which is pyrrhotite that account for approximately 11% occurring in migmatitic granite in disseminative and massive form and its gangue minerals take about 80% with quartz and feldspar as main minerals.

老柞山金矿原生矿石为稠密浸染状、致密块状金矿石，矿石中主要金属矿物为磁黄铁矿，约占11%，磁黄铁矿以浸染、致密块状分布于混合花岗岩中；脉石矿物约占80%，以石英、长石为主。

The results show that jamesonite and pyrrhotite have good floatability in the pH range of 2-10 and marmatite has good floatability in the acid and it is difficult to separate these minerals. In the pH range of 6-8, the separation of jamesonite and pyrrhotite, marmatite is possible when using mercaptoacetic acid and mercaptoethanol as depressants. In case of the presence of Cu2+ ion, however, it is difficult to separate the three minerals. Infrared spectrum demonstrates that there are a number of function groups such as —SH,—COOH,—OH in the molecular structure of depressant.

结果表明：用丁黄药作捕收剂，脆硫锑铅矿和磁黄铁矿在pH 2~10范围内都有良好的可浮性，铁闪锌矿在酸性条件下可浮性好，三者分离困难；在pH 6~8之间，采用巯基乙酸和巯基乙醇作抑制剂，脆硫锑铅矿与磁黄铁矿和铁闪锌矿的分离是可能的；但铜离子存在时， 3种矿物之间的选择性分离是难以实现的。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了