硫化物的

The occurrence mechanism of gold is discussed on the basis of microtexture and crystallographyThe fact that the fineness of gold in the deposit is low suggests that the development degree of sulfi...

该矿区金的成色较低的事实，说明了硫化物的发育程度直接影响着金的成色。推断石湖金矿是在多期次成矿的晚期才大量富集的。

L the normal zonning in order of greisen type tin deposit 〓tourmalite type tin deposit 〓 cassiterite quartz type tin deposit 〓cassiterite sulfide tin deposit copper-lead-zinc 〓 sulfide deposit 〓lead-zinc sulfide deposit 〓antimony deposit, which may be related to the high-level em placement of the intrusions;2 the reversed zoning in order of lead-zinc deposit 〓copper-lead-zinc deposit 〓tin polymetallic deposit, which may be result from the descending of heat centre of the intrusions with their cold and solidification.

该成矿系列的矿床在空间上有序分带，即以岩体为中心的顺向分带为：云英岩型锡矿床〓电英岩型锡矿床〓锡石石英型锡矿床〓锡石硫化物型锡矿床〓铜铅锌金属硫化物矿床〓铅锌硫化物矿床〓锑矿床，逆向分带为：锡多金属矿床〓铜铅锌硫化物矿床〓铅锌硫化物矿床，造成这种分带现象的内在因素是高热能且富含矿热液的黑云母花岗岩的高侵定位和岩体热中心的向下移动。

Results show that sulfides can be refined and disperse evenly after continuous multi-pass rolling, with the average width of sulfides being 4.91μm, the average length being 14.27μm, the average aspect ratio being 3.03, and the average area being 44.72μm2. The sulfides can refine the microstructure due to their pinning effect, and the reefing effect shows Zener relation.

结果表明，连续、多道次变形的轧制工艺能够使硫化物破碎并均匀弥散化，硫化物平均宽度4.91μm，平均长度14.27μm，平均长宽比3.03，平均面积44.72μm2；硫化物组织细化的原因是作为第二相粒子钉扎晶界，硫化物颗粒细化组织满足Zener关系。

On the base of sodium hydroxide and zinc acetate to adsorb the sulfide and the sodium borate buffer added to enhance the deposition effect,the deposition of zinc hydroxide and zinc sulfide was separated from the solution by a centrifuge ,then the soluble sulfide was determined by the method of methylence blue.

在Zn(CH3COO)2和NaOH溶液固定硫化物和硼砂缓冲液加强沉淀效果的基础上，提出用离心法将硫化物从溶液中分离出来，采用亚甲基蓝法测定水样中硫化物浓度的方法。

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。

From the point of spatial distribution of mineral assemblage of a hydrothermal sulfide congeries, the upper part is dominated with chimney, and the lower part with massive sulfides followed by stockwork sulfides in the deep part. This seems to be a common feature of various hydrothermal active areas.

从矿物组合的空间分布来看，热液硫化物堆积体上部以烟囱体为主，下部以块状硫化物为主，深部以网脉状硫化物为主，这在不同热液活动区似乎具有普遍性。

To reduce the poisonous compounds in the breeding ponds,five species of bacteria including denitrobacteria ,photosynthetic bacteria,thiobacteria and bioflocculation bacteria were screened from the breeding water.

针对养殖水体中因氨态氮、硫化氢和小分子有机酸富营养化引起的污染问题，分离筛选出硝化细菌、反硝化细菌、光合细菌、硫化细菌和生物絮凝菌等具有不同生理功能的污染物治理菌株，经优化配伍制备出性能优良的复合功能菌，结果表明：硝化细菌对氨态氮的去除率达97.8%，亚硝态氮的去除率达95.7%，反硝化细菌对硝态氮的去除率为96.4%，光合细菌和硫化细菌对硫化氢的去除率为55%，微生物絮凝菌的絮凝效率为83%；复合功能菌对CODCr、NH4+-N，总氮、硫化物的去除率分别可达94.3%，89.6%，88.7%和71.3%。

Simulating the real conditions in sour petroleum tanks, the naturnal oxidation tendency of iron sulfides formed by hydron sulfide reacting with iron hydroxide, ferric oxide and magnetite was studied.

模拟油品储罐中的实际情况，重点研究了由硫化氢气体与铁及铁的腐蚀产物（包括铁的氧化物和氢氧化物）反应所生成的铁的硫化物的自然氧化倾向性。

The experiment and the research indicate that:(1) Through the Hot-Continuous-Rolling production technics under small reduction ratio of 4.04 and 5.08, the rectangular continuous-casting billet of 235×265mm can be used to produce big size steel stick of Φ140mm and Φ 125mm whose macrostructure and mechanical properties meet the standards, this technics is viable;(2) This rolling technics can make the deformation penetrate to the center of the billet by low temperture and low velocity and big roller diameter and large reduction quantity at every pass and optimum design and arrangement of rollers, which is the key of Hot-Continuous-Rolling technics under small reduction ratio;(3) The sending technics used in Xining Special Steel Co.,Ltd can not use waste-heat of billet adequately, but the sensitive temperature section of A1N or sulphides or inclusions separating out is avoided, creating a favorablecondition for insuring good surface quality of final rolled steel;(4) The Hot-Continuous-Rolling technics under small reduction ratio has a close relationship with the billet quality control and the hot sending process control and the cooling control after rolling.

通过实验研究表明：(1) 235×265mm矩形连铸坯分别采用4.04和5.08的小压缩比热连轧生产工艺，所生产的Φ140mm和Φ125mm的大规格棒材，其低倍组织和机械性能均符合标准要求，该工艺是可行的；(2)本实验所采取的低温低速、大辊径大道次压下量轧制工艺加上轧辊孔型的优化设计与配置，可以使加工变形渗透到铸坯的中心，这一点是实现小压缩比热连轧生产工艺的关键；(3)西宁特钢在红送过程中虽然铸坯余热未能得到充分的利用，但是有效地避开了A1N、硫化物的析出及夹杂物偏析的敏感温度区，为保证最终轧材良好的表面质量创造了有利的条件；(4)小压缩比热连轧生产与铸坯质量控制，热送过程控制以及轧后冷却控制密不可分。

After preliminary study, it is found that the main factors which control the hydrocarbon and mercury anomaly patterns to form upon metallic ore deposits have four: a.

经初步研究表明，金属矿床上方形成各类烃汞异常模式的主要决定因素有四个：一是烃汞运移的通道；二是成矿期的热差效应；三是金属硫化物的氧化作用：四是地温差异。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。