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leaching     
相关语句
  浸出
    Study on Technology and Mechanism of Mechanical Activation Enhancing Leaching of Gold Concentrate Containing Arsenic
    机械活化强化含砷金精矿浸出的工艺及机理研究
短句来源
    COPPER LEACHING IN ANCIENT CHINA
    我国古代浸出法采铜
短句来源
    THE DIRECT LEACHING OF ROASTED MOLYBDENITE BY AMMONIA INSTEAD OF AQUEOUS AMMONIA
    用氨代替氨水直接浸出钼焙砂
短句来源
    Direct leaching of zinc sulfide concentrate by pyrolusite and simultaneous electrolysis of zinc and manganese dioxide
    硫化锌精矿、软锰矿直接浸出及Zn-MnO_2同时电解的研究
短句来源
    Physical Chemistry of the Selective Leaching of Polymetallic Ore
    多金属矿选择性浸出的物理化学
短句来源
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    STUDY ON PRESSURE ALKALINE LEACHING AND ITS APPLICATION TO URANIUM ORES
    铀矿加压碱的研究与应用
短句来源
    theoretical study of gold extraction by thiosulfate leaching-cathodic process and the mechanism of gold leaching
    硫代硫酸盐提金理论研究——阴极过程及金机理
短句来源
    Application of hydrogen peroxide to cyanide leaching of gold
    过氧化氢在氰化法金中的应用
短句来源
    Extraction Mechanism of Gold(Ⅰ)by Petroleum Sulfoxides from Gold-Thiourea Leaching Solution
    石油亚砜在硫脲金液中萃取Au(Ⅰ)之机理
短句来源
    THE STUDY OF DAMAGE MECHANISM OF ZINC LEACHING CINDER VOLATILE KILN LINING
    锌出渣挥发窑窑衬破损机理的研究
短句来源
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  浸取
    Study of leaching gold and silver by thiocyanate process
    硫氰酸盐法浸取金银的研究
短句来源
    A study on pre-treatment of refractory carbonaceous ore and cyanide leaching of gold
    细微碳质金矿的预处理和氰化浸取研究
短句来源
    Pretreatment of refractory gold ore I Study of gold leaching by thiosufate after roast
    难浸金矿石的预处理 Ⅰ.焙烧—硫代硫酸盐法浸取金的研究
短句来源
    LEACHING KINETICS OF Au-BEARING SULPHIDE CONCENTRATE BY FeCl_3 SOLUTION
    FeCl_3浸取含Au复杂硫化矿的动力学研究
短句来源
    A QUICK METHOD FOR SUCCESSIVE DETERMINATION OF THIOUREA AND Fe(Ⅱ) IN GOLD THIOUREA LEACHING SOLUTION
    硫脲法提金浸取溶液中硫脲与Fe(Ⅱ)连续快速测定法
短句来源
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  淋洗
    The molybdenum in leaching solution,absorbed or eluted solution and stripping solution can be directly determined by spectrophotometry.
    淋浸液、吸附淋洗夜和反萃取液中的钼可直接采用光度法测定 ;
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  leaching
They are functionally interconnected processes in the soil nitrogen cycle that are involved in the control of long-term nitrogen losses in ecosystems through nitrate leaching and gaseous N losses.
      
In the circulating fluidized-bed combustion of coal, the content of selenium in ash from the chimney was reduced to one-fourth of its original value and that in leaching water from the chimney decreased by two orders of magnitude using lime.
      
The Mn/Ce serial catalysts were characterized by Brunauer-Emmett-Teller (BET) analysis and the metal cation leaching was measured by inductively coupled plasma torch-atomic emission spectrometry (ICP-AES).
      
The metallic ion leaching is comparatively low (Mn>amp;lt;6.577 mg/L and Ce>amp;lt;0.6910 mg/L, respectively) in the CWAO process.
      
A two-step continuous flow leaching system consisting of an acidifying reactor and a leaching reactor was introduced to achieve the bioleaching of spent nickel-cadmium (Ni-Cd) batteries.
      
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The ore processed in Datun dressing mill in Yunnan province of China occurs in the hypotermal deposit. This ore is cassiterite-polymetallic sulphide ore with tin, copper, tungsten and bismuth content. Based on investigation results and plant practice a combined dressing-metallurgy technology for treatment of casiterite-polymetallic sulphide ore to separate tin, tungsten, bismuth, sulfur minerals from the rough tin concentrate has been developed. By this technology the run-of-mine ore is crushed, ground and sent...

The ore processed in Datun dressing mill in Yunnan province of China occurs in the hypotermal deposit. This ore is cassiterite-polymetallic sulphide ore with tin, copper, tungsten and bismuth content. Based on investigation results and plant practice a combined dressing-metallurgy technology for treatment of casiterite-polymetallic sulphide ore to separate tin, tungsten, bismuth, sulfur minerals from the rough tin concentrate has been developed. By this technology the run-of-mine ore is crushed, ground and sent to flotation of copper, and other sulphide minerals. The flotation cell product is processed by gravity method to produce rough tin concentrate which is cleaned to yield tin concentrate, tungsten concentrate, tin-tungsten middlings, bismuth concentrate and tin middlings with high sulfur content. These products are upgraded further by metallurgy method. The tin concentrate is direct sent to reduction smelting to yield matallic tin. The tungsten concentrate is refined by chloridizing volatilization to recover tin from it. Tin-tungsten middlings are subjected to decomposition by chlorhydric acid, refining by ammoniacal liquor, crystallization and calcining to produce WO_3 powder and tin concentrate. The bismuth concentrate are treated by chlorhydric acid leaching, electrowinning and refining to obtain metallic bismuth. The bismuth slag is treated by dressing method for recovery of tin. The tin middings with rich sulfur content are to fuming furnace as sulfidizing agent and for recovery tin. As the combined technology has been in operation, high tin recovery (95%) is achieved and 90% sulfur can be used, tungsten recovery is 70%, bismuth recovery is only 39.94% due to fineness of bismuth crystal which presents more in sheet form. This is one subject of investigation in future.

本文根据试验结果和生产实践,阐述了采用选矿冶金联合工艺分离锡石——多金属硫化矿粗锡精矿中锡钨铋硫矿物的过程。论述了多种有用矿物致密共生的矿石采用选矿冶金联合工艺的必要性和重要性,证实了选矿冶金联合工艺是有效分离上述矿石的各种矿物的有效方法。

This experimental investigation suggests a new flowsheet for the hydrometallurgy of zinc. The flowsheet possesses several advantages: no alkali consumption, high recovery of rare metals, high quality of purified solution, ease of filtration of iron-rich leach residue, etc. After scaling up to one-cubic meter capacity, the experiment has proven that: (1) high-temperature zinc calcine is amenable to hydrometallurgical extraction with excellent results; (2) zinc sulfite is an active reducing agent capable of performing...

This experimental investigation suggests a new flowsheet for the hydrometallurgy of zinc. The flowsheet possesses several advantages: no alkali consumption, high recovery of rare metals, high quality of purified solution, ease of filtration of iron-rich leach residue, etc. After scaling up to one-cubic meter capacity, the experiment has proven that: (1) high-temperature zinc calcine is amenable to hydrometallurgical extraction with excellent results; (2) zinc sulfite is an active reducing agent capable of performing reduction at low temperature, in a short time, with small excess of reagent and high reductive rate. The required zinc sulfite may be prepared by using zinc calcine or flue dust to absorb the acid waste gases (containing 0.2-0.5% SO_2), thus simultaneous solving the waste gas pollution problem; (3) The enrichment of indium by cyclic leaching operations not only simplifies the flowsheet but also increases its enrichment factor in solution; (4) a high speed oxidation of ferrous ions is guaranteed by using a turbo-stirrer; and (5) the use of limestone as a neutralizing agent for part of the spent cell acid can achieve acid equilibrium in the system and obtain an iron residue with low zinc content.

本试验研究提供了一个湿法炼锌的新型流程。此流程具有:不耗碱、稀散金属回收率高、溶液质量好、铁渣过滤快等优点。1m~3扩大试验证实:(1) 高温锌焙砂用于湿法炼锌效果良好;(2) 亚硫酸锌是一种活性还原剂,还原过程温度低、时间短、过剩系数小、还原率高。亚硫酸锌可由制酸尾气(含SO_20.2~0.5%)用焙砂或烟尘吸收获得,同时顺便解决了废气污染问题;(3) 采用循环富集沉铟,既简化流程又提高铟的富集倍数;(4) 使用透平搅拌保证了Fe~(2+)的高速氧化;(5) 采用石灰石作中和剂解决了系统的酸平衡问题并获得贫锌铁渣。

Synthetic samples were prepared and studied to simulate the phase changes of iron—cobalt compounds in the reduction roasting—ammoniacal leaching processing of oxidized ore. Metallic phases formed from reduction of oxides of iron and cobalt at temperatures of 500-800℃ are alloys. By controlling the conditions of reduction, cobalt in the oxides of iron and cobalt can be completely reduced to the metallic phase while most of the iron is reduced to Fe_3O_4. In ammoniacal leaching, the Fe-Co alloy with...

Synthetic samples were prepared and studied to simulate the phase changes of iron—cobalt compounds in the reduction roasting—ammoniacal leaching processing of oxidized ore. Metallic phases formed from reduction of oxides of iron and cobalt at temperatures of 500-800℃ are alloys. By controlling the conditions of reduction, cobalt in the oxides of iron and cobalt can be completely reduced to the metallic phase while most of the iron is reduced to Fe_3O_4. In ammoniacal leaching, the Fe-Co alloy with cobalt of a face-centered cubic structure disappears first, followed by the disappearance of the alloy with α-Fe structure. Most of the FeO dissolves rapidly, while a small portion remains undissolved during the rest of the leaching process. The percentage of cobalt in the FeO phase decreases as the amount of FeO phase increases. It seems that the cobalt in Fe_3O_4 is insoluble in the ammoniacal solution.

本文用合成样品对氧化矿还原焙烧过程中铁钻化合物物相变化进行了考察。以铁钴氧化物为原料,在550~800℃还原生成的金属相都是以合金状态存在。控制还原条件,能将铁钴氧化物中钴全部还原到金属相,铁大部分还原到Fe_3O_4相。在浸取过程中,具有面心立方金属钴结构的铁钴合金相先消失,具有α-Fe结构的铁钴合金相后消失。绝大部分FeO相很快溶出,剩下小部分FeO相在以后浸出中不再变化。FeO相中含钴量,随FeO相含量的增加而降低。Fe_3O_4相中的钴在氨溶液中似乎是不溶的。

 
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