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含铅
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  containing lead
     Production Practice of 150mm×150mm Concasting Billet of Low Carbon Containing Lead Free-Cutting Steel
     低碳含铅易切削钢150mm×150mm连铸坯的生产实践
短句来源
     Simulation on the Optical Properties for the PbWO_4 Crystal Containing Lead Vacancy
     含铅空位PbWO_4晶体光学性质的模拟计算
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     Study on the production of lead stearate using waste material containing lead
     含铅废渣生产硬脂酸铅的研究
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     Optical polarized properties for the PbWO_4 crystal containing lead vacancy
     含铅空位的PbWO_4晶体光学性质及其偏振特性的研究
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     Treatment of wastewater containing lead with modified apatite
     改性磷灰石处理含铅废水的应用研究
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  lead bearing
     When pH is 5.0, and others are under the same condition, many experiments on real lead bearing wastewater have been done and the results show that lead bearing 915 mg/L wastewater can be reduced to below 0.21 mg/L after being treated, and the re-pollution can be avoided.
     在pH=5.0,条件相同时,对实际含铅废水进行多次实验,含铅915 mg/L的废水经处理后,可降至0.21 mg/L以下,且不存在二次污染。
短句来源
     After yellow element is extracted from peanut shells by the effect of mixed liquid of ethanol and acetic acid, the remains will be used respectively to treat simulated lead bearing wastewater, chromium bearing wastewater, nickel bearing wastewater, and also actual lead bearing wastewater discharged from a circuit board-making factory in Fuzhou.
     花生壳在乙醇和醋酸混合液作用下分离出黄色素后,剩余残渣分别用于处理模拟含铅废水、含铬废水、含镍废水、含铜废水、含铁废水及福州市某电路板厂待处理的含铅废水。
短句来源
     An experimental research of putting xonotlite secondary particles to train granular sludge and treating lead bearing wastewater has been carried out.
     硬硅钙石二次粒子培养颗粒污泥并用于处理含铅废水进行了实验研究。
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     A new technology——desulfurization of coke oven gas(COG) by adding zinc & lead bearing metallurgical dust (ZLMD) directly into coking coal was developed which makes it possible to avoid special equipment for recycling ZLMD and removal of sulfur in COG.
     将含铅锌冶金粉尘直接添加到炼焦煤中实现煤气脱硫的新技术 ,使得焦炉煤气脱硫不需要添加专门的脱硫设备成为可能 ,并可同时完成含铅锌冶金粉尘的回收利用 .
短句来源
     Effect of putting xonotlite secondary particles to train granular sludge and treating lead bearing wastewater
     添加硬硅钙石二次粒子培养颗粒污泥及其对处理含铅废水的影响研究
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  leaded
     Study the Craft of Flotation Gets Rid of Pb from the Leaded Gold Concentrate
     含铅金精矿浮选除铅工艺研究
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     In order to satisfy increasingly strict environmental protection rules,to meet the requirement of harmonious and sustainable development of human society. Experiments were conducted to replace leaded HB-2000LB cathode electrophoretic coatings with lead-free LB-20LF cathode electrophoretic coatings.
     为满足日益严格的环保法规和适应人类社会和谐、可持续发展的要求,开展了用无铅阴极电泳涂料LB-20LF置换含铅阴极电泳涂料HB-2000LB的试验工作。
短句来源
     At present, on one hand, industrial production discharges a large amount of leaded waste water, cause serious pollution to the water body and jeopardize the health of the human body finally;
     目前,一方面,工业生产排出了大量的含铅废水,对水体造成严重的污染,最终危及人体的健康;
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     China has banned the use of leaded gasoline and gasoline with RON less than 90 since July 1,2000. The implementation of new gasoline standard GB 17930-1999 indicates that the gasoline quality rises significantly in terms of environmental friendliness.
     从2000年7月1日起,我国禁止使用含铅汽油和研究法锌烷值低于90的低标号汽油。 汽油新标准GB17930-1999的实施,标志着汽油质量在减少发动机排放的进程中取得了显著的进步。
短句来源
     Comparison of Membrane Toxicity between the Extracts from Unleaded and Leaded Gasoline Exhaust Particulates
     含铅、无铅汽油尾气排出颗粒提取物的细胞膜毒性比较(英文)
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  “含铅”译为未确定词的双语例句
     Results In stationery,lead contents in pencils was(129.90±52.53)mg/kg,and the qualification rate was 95.83%.
     结果文具类含铅量为铅笔(129.90±52.53)mg/kg,合格率95.83%;
短句来源
     As for drinks,lead level of those stuffed with aluminium can was(0.27±0.09)mg/kg,qualification rate was 71.40%;
     果酸饮料类含铅量为铝罐听装(0.27±0.09)mg/kg,合格率71.40%;
短句来源
     The yield,grades of copper,silver and lead for the copper concentrate are 12.79%,21.05%,286.30g/t and 4.59%,respectively. The copper recovery is up to 93.40%,and the total recovery of silver is 81.11%.
     铜精矿的产率为12.79%,品位21.05%,银品位286.30g/t,互含铅4.59%,铜的回收率可达93.40%,银的总回收率为81.11%。
短句来源
     The pH is about 12 and lead content is 300~400mg/L in the wastewater.
     尾矿水pH在 12左右 ,含铅 3 0 0~ 40 0mg/L。
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     The pH is 6~9 and lead content is less than 1mg/L in the drainage,according with the national discharge standard.
     治理后的外排水pH在 6~ 9,含铅 <1mg/L ,均符合国家排放标准
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  containing lead
The paper reports the results of a comparative investigation into the leaching kinetics of two-phase alkali borosilicate glasses containing lead oxide in 3 M HCl solution at 100°C and the glasses free from lead oxide.
      
Electrical Properties and the Structure of Halogen-Containing Lead Borate Glasses: I.
      
Electrical Properties and the Structure of Halogen-Containing Lead Borate Glasses: II.
      
Effect of Gamma Radiation on Optical and EPR Absorption Spectra of Phosphate and Fluoride Glasses Containing Lead
      
The induced optical and EPR absorption spectra of phosphate and fluoride glasses containing lead are investigated.
      
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  lead bearing
Certain samples of lead bearing minerals have an affinity toward contamination when prepared for gas source mass spectral analysis.
      
The results indicate that the better sinterability of the lead bearing β.q.ss glass-ceramic than the lead free one could be explained by changes of bulk to surface nucleation and increase of its activation energy for crystallization.
      
At the other hand, it could not be observed any differences between the nucleation mechanism and the activation energy for crystallization of the lead bearing and lead free gahnite glass-ceramics.
      
Electrochemical migration (ECM) tests on lead bearing and lead free solder joints on Cu lamination on FR-4 board were conducted by applying constant voltage.
      
The reduction of lead calcium silicate, the principal lead bearing phase in the feed material to a commercial blast furnace, is initiated at about 750 °C.
      
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  leaded
The use of leaded gasoline in the South Asian countries may be a main source of Pb in this region.
      
Benzene emission comparisons by gas chromatography of leaded versus unleaded and "gasohol" versus straight-hydrocarbon fuel vapo
      
Results indicated that leaded fuels emitted more benzene than unleaded fuels.
      
Though benzene concentrations varied for unleaded vapors, leaded gasohol fuels had higher benzene levels than their straight-hydrocarbon counterparts.
      
These higher benzene emission levels may be an indication that volatility increases in leaded and some gasohol brands.
      
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Volumetrically selenium can be determined by precipitating as lead selenate,and then titrate the precipitated lead with EDTA solution. Selenate can be precipitated quantitatively with lead nitrate in slight acidsolution containing 30% ethyl alcohol. It is best precipitated at pH 2--3. If seleniumis present as selenite, it can be oxidized to selenate with excess potassium perman-ganate, the excess of which is removed with hydrogen peroxide. Lead in precipitates is determined by dissolving the precipitate in alkaline...

Volumetrically selenium can be determined by precipitating as lead selenate,and then titrate the precipitated lead with EDTA solution. Selenate can be precipitated quantitatively with lead nitrate in slight acidsolution containing 30% ethyl alcohol. It is best precipitated at pH 2--3. If seleniumis present as selenite, it can be oxidized to selenate with excess potassium perman-ganate, the excess of which is removed with hydrogen peroxide. Lead in precipitates is determined by dissolving the precipitate in alkaline buffersolution containing ascorbic acid and excess standand EDTA solution. The solution isback titrated with standard manganous salt solution with Eriochrome black T asindicator. This proposed method for the determination of selenium is rapid and accurate.Te, Gu, Fe, etc., if present in small amounts, cause no interference,

本文提出使硒成为硒酸铅沉淀,再用EDTA容量法滴定沉淀中的铅以间接测定硒的方法。硒酸铅的沉淀作用最好在pH值为2—3及含30%体积乙醇的水溶液中进行,所得沉淀溶于过量EDTA溶液内,用亚锰盐回滴法测定所含的铅可得精确结果。少量的碲及铜、铁等元素不妨碍测定。

For the determination of traces of lead and small quantities of copper in pure cobalt, the method of anodic stripping voltammetry with hanging mercury drop electrode was used when the copper content was much larger than lead. The method can be applied to 0.04-48 r of lead, 5-550 r of copper and 0.100-0.400 g of cobalt in 25 ml of solution, the concentration of nitric acid being 0.24 M or lower. The interference of copper with the determination of lead was found to be negligible even when Cu: Pb=1000: 1.

本文选用悬汞电极阳极溶出伏安法,在铜量远大于铅量的情况下,完成了金属钴中少量铜及痕迹量铅的测定。确定了25毫升溶液中,含钴量在0.100——0.400克范围内,溶液中硝酸浓度不高于0.24M,含铅量在0.04——48微克,含铜量在5——550微克范围内,均可用本法测定。铜大于铅量1000倍时,尚不干扰铅的测定。

This article describes a new process for the continuous decopperization of crude lead, which has been applied in the Shenyang Smelter since September 1974. The basic principle of the process and the structure of the furnace are described. The production practice, operational experience, principal technical indices and process improvements in the past five years are given in detail. The article further describes the following new propositions about the process. (1) There is no relationship between the copper...

This article describes a new process for the continuous decopperization of crude lead, which has been applied in the Shenyang Smelter since September 1974. The basic principle of the process and the structure of the furnace are described. The production practice, operational experience, principal technical indices and process improvements in the past five years are given in detail. The article further describes the following new propositions about the process. (1) There is no relationship between the copper content in decoppered lead and the lead content in the matte produced. Even when the Cu content in the decoppered lead is less than 0.08%, high Cu: Pb ratio matte can be produced. (2) The ratio be- tween sulfur and copper (S/Cu) in the charge should be 0.5 instead of 0.25. A ratio of 0.25 is not sufficient for the process. (3) In order to decrease the lead content in the matte and to raise the Cu: Pb ratio, it is necessary and reasonable to add some scrap iron to replace the lead in it. To judge the correct end point of iron addition is the crux of the process. The composition of the crude lead treated is as follows (%): 96-97.5 Pb, 0.8- 1.3 Cu, 0.3 As, 0.8 Sb and 0.2-0.5 S. The blast-furnace crude lead is charged into the furnace as hot liquid. Then 0.6-0.8% soda, 0.2-0.3% coke and 2% lead sulfide con- centrate are added. The decoppered lead is discharged from the end of furnace by syphoning. De- pending on the degree of aggregation, the matte and slag are discharged about once a day. After discharging the slag, scrap iron is added into the matte to replace the lead in it. The Cu content of the output lead is 0.05-0.08%, it may be cast into anodes directly for e1ectrolysis. Lead content of the tapped slag is<2%. The matte has a Cu: Pb ratio of 3-5 (average 4), and can be sent to the copper smelter to re- cover copper without additional treatment. The productivity of the furnace bed is 10-l2 t/m~2. day. The decopperization efficiency is about 95%. In the output lead the recovery of Pb is about 99%, Sb-80%, As-70%. The volatility of lead is 0.3-0.4%. Finally, it is pointed out that maintaining a S: Cu ratio of 0.5 is of importance to the decopperization and matte formation process and in the elimination of bloc- kage.

本文简要地叙述了沈阳冶炼厂的粗铅连续脱铜新工艺。文中就脱铜过程阐述了如下一些新的论点:脱铜铅含铜与产出的冰铜含铅(或铜铅比)无关。在脱铜铅含铜低于0.08%的同时,能够产出钢铅比较高的冰铜;炉料中的硫铜比应保持0.5,而不是0.25;为了降低冰铜含铅,提高铜铅比,向冰铜中加入铁屑置换其中的铅是必要的,合理的,准确地判断加铁过程的终点是这一操作过程的关键。

 
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