查询词典 pyrite

However, when occurring in Mesozoic remelted granite, pyrite is featured mainly by high gold content in pentagonal dodecahedron and in its complex; low content in cubic pyrite; Au/Ag ratio between 1-2; both N and P types of pyrite present in most deposits and P type only in a few deposits.

产于中生代重熔花岗岩中时，黄铁矿以五角十二面体居多，五角十二面体及其聚形含金较高，立方体含金性较差；Au/Ag比值在1-2之间，As的含量较高(＞600×10〓)；Co、Ni的含量则较低，一般为10n×10〓；热电性以既有P型又有N型的P、N混合型为特征，少数金矿床表现为单一的P型。

This subject is on the basis of a detail investigation of present utilization and recovery of pyrite cinder, and taking pyrite cinder from the Jinshandian vitriol factory of Wuhan Steel and Mining Industry Corporation as raw material. FeSO_4 is produced by adopting baking of pyrite cinder and vitriol lixiviation, and introducing the new high price ion during the course of making Poly ferric Sulphate to make Iron-modified flocculants.

本课题在对目前硫铁矿烧渣回收及利用现状进行深入综合考察的基础上，利用武钢矿业公司金山店铁矿硫酸厂的硫铁矿烧渣为原料，采用还原焙烧，酸浸工艺制取硫酸亚铁，在制取聚合硫酸铁的基础上引入新的高价离子，制取复合聚铁絮凝剂。

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。

Further more researches indicate that it is just the bacteria adhereing that decrease surface free energy of pyrite and reduce the effect of catching pyrite by catching medicament. But the desulfurization is not the oxidation action of microbial or decreasing its hydrophile of pyrite.

而且发现正是由于T.f菌及其分泌物的吸附使黄铁矿的表面自由能减小，从而降低了捕收剂对黄铁矿的捕收效果，不是由于细菌氧化的作用或通过增加黄铁矿的亲水作用而脱除黄铁矿硫的。

Especially, the typically stromatolitic pyrite, micro-strawberric pyrite, microgranular pyrite and rarely helical and silky pyrite have roughly been explained with the biogenic agency.

特别对较典型的叠层石黄铁矿、显微莓球黄铁矿、黄铁矿的微小球粒及较罕见的螺旋状和丝状黄铁矿用生物成因进行了初步解释。

Located in the prospecting lines Nos.47 and 37-33 on the middle 270m section, the mineral typomorphic characteristics are as follows: pyrite possesses the combination of octahedron with pyritohedron, pyritohedron with octahedron, etc It appearsas hole-centre and mix center conduction, if being electron-centre conduction, the absolute magnitudes of thermoelectromotive force and thermoelectromotive coefficient of pyrite are bigger relatively; pyrite contains Cu; the relative absorbency in quartz D(subscript H2O0.9403, D(subscript CO2)0.1961, D(subscript CO2)/D(subscript H2O)0.2591 in prospecting lines 37-33 is smaller than average D(subscript H2O1.3267, D(subscript CO2)0.3090, D(subscript CO2)/D(subscript H2O)0.338 2 in the deposit.

江西茅排金矿区270m中段47勘探线及37~33勘探线的矿物标型特征为：黄铁矿形态见有八面体和五角十二面体，五角十二面体和八面体等聚形；出现空穴心型导电和混合型导电黄铁矿，若为电子心型导电黄铁矿，其热电动势和热电系数的绝对值相对较大；黄铁矿成分中检测出Cu；石英相对吸光度（37~33勘探线）D(下标 H2O)0.9403，D(下标 CO2)0.1961，D(下标 CO2)/D(下标 H2O)0.2591，略低于矿区研究样品的平均值D(下标 H2O1.3267，D(下标 CO2)0.3090，D(下标 CO2)/D(下标 H2O)0.3382。

］ The expiration properties and the optimal activation time of mechanically activated pyrite was deduced by measuring the maximal potential difference of the galvanic cell in the same electrolyte with the activated pyrite and the unactivated pyrite as the electrode material respectively.

摘 要］通过比较由活化和未活化黄铁矿在相同种类、相同浓度的电解质溶液中构成原电池的最大电势差，确定了活化矿的失效性和最佳活化时间。

Based on discussion of industry environment of pyrite mine,sulfuric acid,phosphate fertilizer industry the position of enterprise strategy of pyrite mine enterprise was defined and new development was for the pyrite mine enterprises were put forward.

分析了硫铁矿企业所处的矿、酸、肥行业环境，明确了企业战略定位及发展方向，对我国硫铁矿企业的生存与发展提出了新的思路。

High temperature is favorable to the formation of low valence state-As minerals and to the addition of As into pyrite crystal lattice, thus is favorable for the formation of P type of pyrite. However, at low temperature, high valence As minerals are easily formed and this case is not suitable for As to add into the pyrite crystal lattice to substitute S, thus the low temperature is beneficial to the formation of N type of pyrite.

As在白然界中的赋存状态与温度的关系表明：高温有利于形成低价态的As矿物，也有利于As呈低价态进入黄铁矿晶格中替代S而形成P型导电；低温则有利于形成高价态As的独立矿物，不利于As呈低价态进入黄铁矿晶格中替代S。，因而有利于形成N型导电。

In the space, along with increased distance from the main ore-controlling structures, the frequency of P type of pyrite and their thermoelectricity also decreased gradually. Within one lode, from the upper to the lower parts of an ore body, the vertical change of pyrite in thermoelectricity as the follows:① when the ore body is stable, that is when the ore body is uniformly and continuously mineralized, the Dp andαvalues keep increased from shallow to deeper parts;② when an ore body is discontinuously mineralized, the Dp andαvalues have a wavy increasing tendency from the shallow to the deeper;③ when the deeper part of an ore body contains abundant, Co and Ni high mafic dykes, the Dp andαvalues of pyrite decreased from the shallow to the deeper parts of an ore body, that is, an reversed zoning of pyrite thermoelectricity occurs for pyrite in this situation contain more Ni and Co and belongs to N type.④ For the deposits hosted in the Archean metamorphic rocks, because all of the pyrite in this case is N-type, the vertical change of pyrite is not featured by the transition of pyrite type, but by the increased values of Vnp and α from the shallow to deeper parts of an ore body.

在空间域上，水平分带规律为：随远离主干断裂，矿脉中P型的出现频率逐渐降低或热电系数值逐渐变小；在同一条矿脉中，这是由于矿化不均匀性及脉岩的影响，由矿体的上部到下部，它的垂向变化特征可以有如下几种变化形式：①由矿体的浅部到深部，黄铁矿的Dp值、或α值呈稳定升高的趋势时，矿体往往表现为矿化均匀，连续性好、延伸稳定；②由浅部到深部，黄铁矿的Dp值、α值呈波状变化，但总体又具有增大的趋势时，所在的矿体连续性差；③当矿脉的下部发育有大量的基性脉岩时，由于基性脉岩中常含有较高的Co、Ni，使其中黄铁矿的Co、Ni含量较高而呈N型导电，由矿体的上部到下部，黄铁矿的Dp值、α值呈减少的趋势，而造成黄铁矿热电性特征的逆向分带，④产于太古代变质岩中的中深脉状金矿，由于其中的黄铁矿均为N型导电，所以垂向变化规律并不表现为导型的改变，只是Vnp值或α值从矿体的上部到下部由小变大。

It is also known as one of the most poisonous naturally occurring substances.

它也被称为一个最自然发生的有毒物质。

The greatest stress is found at the location on the cross section where V is the largest.

最大应力出现在横截面上V为最大的地方。