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1.
某铅锌矿原矿铅含量为1.26%,含锌6.53%,含硫30.38%。生产上采用“铅锌依次优先浮选-中矿顺序返回”工艺流程,生产指标为铅精矿铅品位50.69%,含锌12.61%,铅回收率75.53%,锌精矿锌品位48.77%,含铅1.59%,锌回收率73.91%。铅锌互含较高,锌精矿指标不理想。为了解决该问题,本文在了解现场生产工艺流程及矿石性质的基础上,针对该铅锌矿开展了详细的选矿工艺优化试验,通过对部分药剂制度进行优化,采用特效捕收剂BK-LY11,同时在锌浮选回路采用中矿再磨工艺,显著改善了铅锌互含情况,有效提高了铅锌选别指标,并成功应用于生产实践,优化后获得的铅、锌回收率分别提高了5.83、8.46个百分点。  相似文献   
2.
刘耀武  米寰鹏 《中国矿业》2021,30(S2):281-285
某铅锌矿原矿Pb品位6.67%,Zn品位13.26%,矿石中含有一定量的易浮脉石——碳质物,同时含硫较高,原矿S品位32.51%,属复杂难选铅锌矿石。矿石中方铅矿嵌布粒度不均匀,且与闪锌矿、黄铁矿共生关系复杂,严重影响选矿过程中铅锌分离及铅硫分离。根据原矿性质,采用“易浮脉石预先浮选-铅锌依次优先”浮选工艺流程进行试验研究,实验室闭路试验获得铅精矿铅品位53.22%,铅回收率85.07%,含锌8.73%;锌精矿锌品位56.19%,锌回收率83.68%,含铅1.23%,实现了铅、锌矿物和黄铁矿的高效分离。  相似文献   
3.
Galena, also known as PbS, was widely used in the production of lead glazes from the beginning of the 18th century to the second half of the 20th century. Although the PbO‐SiO2 system has been studied for years, the PbS–SiO2 phase diagram, involved in the formation of a glaze with galena, has not yet been investigated. Temperature transformations for the system 75 wt% PbS‐25 wt% SiO2 are investigated in a high‐temperature resolved X‐ray diffraction experiment with synchrotron radiation and compared to those of the equivalent system 70 wt% PbO‐30 wt% SiO2. Lanarkite, PbO·PbSO4, is the phase predominantly formed as soon as galena decomposes during the heating. The results show that the system melts at a temperature higher than the PbO–SiO2 system, but far lower than those expected for the PbO–PbSO4–PbS system. A historical misfired lead glaze produced with galena is also studied. The presence of galena, lanarkite, and mattheddleite, Pb10(SiO4)3.5(SO4)2Cl2, is determined and discussed in terms of the composition of the galena mineral used and the firing conditions in light of the high‐temperature transformations previously obtained.  相似文献   
4.
共生铅-锌混合精矿硫酸化焙烧分离铅、锌研究   总被引:1,自引:0,他引:1  
采用硫酸化焙烧工艺对某共生铅-锌混合精矿进行了铅锌分离试验研究。在硫酸化焙烧过程中,硫化铅和硫化锌与氧气反应生成硫酸铅和硫酸锌;利用硫酸锌易溶于水、硫酸铅不溶于水的特性,采用水浸工艺对焙烧产品进行铅、锌分离。结果表明:在焙烧物料球团直径小于8.0 mm、空气流量1.0 L/min、焙烧温度650℃、焙烧时间2.5 h、硫酸钠用量2.4%、硫酸钙用量3.6%、常温常压下浸出1.5 h、浸出液固比1.5∶1,得到了锌浸出率96.05%~96.68%、平均96.35%,铅渣品位56.89%~57.25%、平均57.11%的指标,铅、锌分离效果明显。  相似文献   
5.
Trace elements and rare earth elements(REE)of the sulfide minerals were determined by inductively-coupled plasma mass spectrometry.The results indicate that V,Cu,Sn,Ga,Cd,In,and Se are concentrated in sphalerite,Sb,As,Ge,and Ti are concentrated in galena,and almost all trace elements in pyrite are low.The Ga and Cd contents in the light-yellow sphalerites are higher than that in the brown and the black sphalerites.The contents of Ge,Ti,In,and Se in brown sphalerites are higher than that in light-yellow sphalerites and black sphalerites.It shows that REE concentrations are higher in pyrite than in sphalerite,and galena.In sphalerites,the REE concentration decreases from light-yellow sphalerites,brown sphalerites,to black sphalerites.The ratios of Ga/In are more than 10,and Co/Ni are less than 1 in the studied sphalerites and pyrites,respectively,indicating that the genesis of the Tianqiao Pb-Zn ore deposit might belong to sedimentary-reformed genesis associated with hydrothermal genesis.The relationship between LnGa and Lnln in sphalerite,and between LnBi and LnSb in galena,indicates that the Tianqiao Pb-Zn ore deposit might belong to sedimentary-reformed genesis.Based on the chondrite-normalized REE patterns,δEu is a negative anomaly(0.13-0.88),andδCe does not show obvious anomaly(0.88-1.31); all the samples have low total REE concentrations(<3ppm)and a wide range of light rare earth element/high rare earth element ratios(1.12-12.35).These results indicate that the ore-forming fluids occur under a reducing environment.Comparison REE compositions and parameters of sphalerites,galenas,pyrites,ores,altered dolostone rocks,strata carbonates,and the pyrite from Lower Carboniferous Datang Formation showed that the ore-forming fluids might come from polycomponent systems,that is,different chronostratigraphic units could make an important contribution to the ore-forming fluids.Combined with the tectonic setting and previous isotopic geochemistry evidence,we conclude that the ore-deposit genesis is hydrothermal,sedimentary reformed,with multisources characteristics of ore-forming fluids.  相似文献   
6.
The co-extraction behavior of galena-pyrolusite in a sodium chloride solution and the electrochemical mechanism of this process were investigated, and some factors affecting the leaching rate of Pb and Mn were optimized. The results show that all the factors such as the concentration of NaCl, HCl and pyrolusite ore, reaction time, temperature, adding times of HCl, affect the leaching rate of Pb. The main affecting factors are the concentration of NaCl, reaction time and temperature. The Tafel polarization curves and EIS plots of the galena and pyrolusite in the NaCl solution demonstrate that during the oxidation process of galena mineral electrode, film forms on the galena surface, which prevents galena from deeper oxidation. However, the film resistance can be greatly reduced in the presence of sodium chloride, thus promoting the reaction rate of galena.  相似文献   
7.
研究了方铅矿在丁铵黑药浮选体系中,尤其是在强碱性介质中的电化学行为。结果表明:丁铵黑药在方铅矿表面以单质硫及捕收剂金属盐为主;采用高碱工艺优先浮选方铅矿,相应的药剂浓度需达到103mol/L以上,该浓度将在一定程度上影响浮选选择性,加大了生产成本,并且对环境不友好。以上这些不足可以采用与乙硫氮混合使用的方法得到解决。在pH=11.0的高碱条件下,合适的乙硫氮及丁铵黑药的质量比为1:1,与之相匹配的药剂用量为2.2?105mol/L左右,丁铵黑药浓度为2.0?105mol/L左右,且电位稳定在0.2V左右最佳。  相似文献   
8.
From the maximal extrapolated film pressure πmax values for n-octane and n-propanol, the dispersion and non-dispersion components of the surface free energy of galena precoated with potassium ethyl xanthate (collector) were estimated and they were then correlated with the floatability of galena. The collector layer deposited by methanol evaporation did not produce any significant changes in the surface free energy of galena. Polymolecular adsorption of the collector occurred from aqueous solution. The adsorbed collector layer of ~8 statistical monolayers in thickness produced a considerable decrease in the dispersion component of the surface free energy and complete disappearance of non-dispersion interactions. At this surface coverage, a certain change in the properties of the adsorbed layer appeared which was probably connected with the formation of polymolecular layers containing dixanthogen. The work of the water adhesion being significantly lower than the work of water cohesion appeared insufficient to achieve a high floatability of galena.  相似文献   
9.
低硫铅锌矿选矿工艺的研究   总被引:2,自引:0,他引:2  
某硫化铅锌矿含铅8.79%,含锌13.24%,采用一段磨矿(细度73%-0.075mm)、选浮铅、中矿循序返回的优元宵服选流程及混合捕收剂乙、丁黄药和SN-9,得到:铅精矿品位71.55%,回收率91.89%;锌精矿品位50.34%,回收率85.38%,并综合回收了伴生的镉、银。  相似文献   
10.
The flotation tests,zeta potential measurements,and Fourier transform infrared spectroscopy(FTIR) analysis on galena,sphalerite,and pyrite were studied in a collecting-depressing-reactivating(CDR) system.In this system,sulphide minerals were first collected and acti-vated by the collector,and then depressed strongly by Ca(OH)2 in a strong alkaline solution.Finally,they were reactivated by H2SO4.The flotation tests of pure minerals showed that in the Ca(OH)2 depressing process sulphide minerals had similar flotation characteristics because they had already been influenced by the collector.Hence,the flotability differences between them were reduced.However,in the H2SO4 re-activating process considerable differences in the flotability between galena and sphalerite/pyrite were produced.That is to say,galena was relatively easy to be reactivated by H2SO4,but sphalerite and pyrite were not reactivated at pH 11.The zeta potentials of sulfide minerals measured by the Zeta Plus presented irreversible characteristics on the change of pH values.The results of the FTIR spectra analysis indi-cated that the collectors already adsorbed on the mineral surface were removed partially by Ca(OH)2.  相似文献   
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