查询词典 lead sulfide

Lead is rarely found free in nature; its major ore is the sulfide galena.

铅在自然界中很少呈游离态，主要存在硫化物和方铅矿中。

The water is laden with toxic substances such as hydrogen sulfide, cadmium, arsenic and lead.

令人难以置信的是，即便是在这种情况下，也存在着生命。

Such technologies might someday lead to the development of an effective, pocket-size sulfide meter.

这类技术也许有一天会发展成有用的口袋型硫化物侦测器。

Through thermodynamic calculation and electrochemical analysis of multiple redox reactions on the minerals of galena, sphalerite and pyrite in different system, it could be found that pulp chemical environment in which hydrophobe of collectorless flotation produced was beneficial to reduce collector dosage in existing flotation system; electrochemical analysis on sphalerite had been engaged; and pulp chemical environment of OPF for lead-zinc-iron sulfide minerals and relevant selective measure for collector and modifer were established.

通过对方铅矿、闪锌矿、黄铁矿在水体系、调整剂体系、捕收剂体系中由局部电池造成的多种氧化—还原反应的热力学分析和电化学测试，补充和完善了铅锌铁硫化矿浮选电化学理论。提出了矿物表面无捕收剂疏水体生成的矿浆化学环境有利于降低现有浮选体系中捕收剂用量的观点；成功地进行了闪锌矿的电

The metal elements of the volcanic-hosted massive sulfide deposit have two sources, the copper and zinc are derived from rhyolitic magmas whereas the lead are probably related to old sediments overlying the rhyolites.(4) It is suggested here that the volcanic rocks hosting massive sulfide deposit in the north Qilian orogen, which are previously considered as a bimodal suite of Neo-proterozoic to middle Cambrian age in a continental rift, are virtually related to subduction magmatism in Ordovician age, and there might have no continental rift magmatism of Neo-proterozoic to middle Cambrian in the north Qilian.

Th/Ta比高(5.0～11.7)，εNd为较大的负值(-2.6～-8.4)，流纹岩的形成可能是两个端元组分混合的过程、或是上地壳混染的结果，形成在活动陆缘环境；(3)北祁连块状硫化物矿床成矿金属物质具有两种来源，Cu、Zn等来源于流纹岩，而Pb的来源可能与古老沉积物有关；(4)本文认为，前人厘定的北祁连新元古代-中寒武纪赋存块状硫化物矿床的大陆裂谷双峰式火山岩应是与俯冲作用有关的奥陶纪火山岩，说明北祁连可能不存在新元古代-中寒武纪的大陆裂谷活动。

The relation between unhairing effect and residual sodium sulfide in limed water was studied to lead to a complete solution of sulfide, lime and organic substance pollution in unhairing and liming process.

实验首先研究了脱毛废液中残余硫化钠含量与脱毛效果的关系，从理论上和实际应用中都解决了脱毛废液中硫化物、石灰和有机物的污染，将污染消除在生产过程中。

The present invention adopts ammonium salt solution as leach, and adopts the liquid-phase oxidation activating agent formed from surfactant sodium ligno-sulfonate or sodium dodecyl sulfonate, liquir phase oxidation catalyst Cu(2+) and sulfur-extracting agent tetrachloroethylene to implement quick leaching process of sulkfide mineral in gas-liquid-solid three-phase reactor, all the sulfurs contained sulfide in mineral powder can be converted into elementary sulfur and sulfuric acid radical, the contained zinc, copper, nickel, cobalt, lead, cadmium and silver can be changed into soluble salt, and fed into leach or remained in the leaching out slag.

本发明涉及的有色金属硫化矿的铵盐液相氧化直接浸出方法，其特征在于：采用铵盐溶液作浸出剂，采用由表面活化剂木质磺酸钠或十二烷基磺酸钠，液相氧化催化剂Cu2+、萃硫剂四氯乙烯组成的液相氧化活化剂，在气液固三相反应器内，实现硫化矿的快速浸出过程，矿粉中各种硫化物所含的硫转变为单质硫和硫酸根，所含的锌、铜、镍、钴、铅、镉、银等变成可溶性盐类进入浸出液中或留在浸出渣中，消除传统流程中二氧化硫，硫化氢，氮氧化物及含砷含汞含铅等有毒烟气的排放。

The recoveries of rhodium by lead and nickel sulfide fire assay were 81.5%±1.2% and 75.1%±3.9%, respectively, and the latter was proved to be independent on matrices of chemical standards and geological standard materials.

铅试金法的流程回收率（ n =4）为81.5%±1.2%；镍锍试金法的流程回收率（ n =6）为75.1%±3.9%，对简单化学标准和地质标准物质基体，铑的回收率相近。

JP2Rhodium of 10-9 level was accurately measured by NAA combined with lead fire assay, and 10－10 level was accurately measured by NAA combined with nickel sulfide fire assay.

铅试金中子活化法可实现10－9铑含量的准确测量，镍锍试金中子活化法可实现10－10铑含量的准确测量。

The sulfide deposits have the stratabound nature and show zoning controlled by different distances from the eruption center. Moreover, there are metallogenetic specializations of thick-bedded basic lava-hosted iron deposits and acid volcanic rock-hosted copper-zinc deposits or lead-zinc-copper deposits.

矿床具有层控性及距火山喷发中心带距离不同而控制的分带性规律，还有厚层基性熔岩形成铁矿、酸性火山岩赋存铜―锌型或铅―锌―铜型矿的岩性成矿专属性。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。