多段螺旋溜槽在选别硫酸厂烧渣中的应用

硫酸厂排出的含铁５０％左右的烧渣，过去仅作为水泥的添加剂，价格低。利用多段螺旋溜槽经过一次选别，可以获得含铁品位大于５５％的铁精矿，供炼铁使用。回收率约５０％，精矿价格提高５～６倍，其分选尾矿仍然可以作水泥的添加剂。分选效果表明，多段螺旋溜槽与普通的螺旋溜槽相比，在品位相当的情况下，回收率提高５％左右。     

瓮福磷矿选矿厂精矿仓设计

瓮福磷矿选矿厂精矿仓首次采用网架式地面矿仓，造价低，空间利用率高，设备运行平稳可靠，操作灵活方便，工作环境好。超长梭式胶带布料机的设计也是成功的。     

钼精矿供应紧张支撑钼市场

介绍了2006年上半年国际、国内钼市场的产量、供需平衡及进出口情况。西方世界钼产量平稳，钼价格呈现出上涨趋势。西方世界钼铁平均价格1月份为53．5～55．8美元／kg，6月份为58．71～60．07美元/kg，上涨9．72％；中国产钼铁在鹿特丹仓库现货价格1月份为50．99～53．70美元／kg，6月份为58．51～60．03美元／kg，上涨14．74％。分析了上半年国际、国内钼市场的形势，预测下半年国际钼市场钼精矿供应仍将紧张，副产钼供应平缓，因此下半年的钼市场将得到支撑。     

微波快速测量球团铁精矿混合原料水分新方法

对目前几种测量水分的方法进行了评述，研究了用微波快速测量球团混合铁精矿原料水分的新方法，并分析和讨论了不同混合铁精矿原料水分含量对检测结果的影响。实验结果为：当球团混合铁精矿原料的含水量为6．97％-9．81％时，检测误差小于0．17％。该研究有望为球团混合铁精矿原料水分快速测量提供一种新力法．     

Kinetics of the oxidation of ilmenite

The oxidation of ilmenite (FeTiO₃) in air and dry oxygen was investigated over the temperature interval 600 to 970°C. Dense platelets of ilmenite crystals as well as powder samples of ilmenite were oxidized. The weight data were recorded employing a thermobalance. The oxidation kinetics of ilmenite platelets were parabolic except for the initial stages during which logarithmic kinetics were observed. For powder samples the logarithmic rate law was followed primarily. The logarithmic rate law was attributed to free penetration of oxygen through cracks and short-circuit paths. The activation energies associated with the logarithmic rate law were nearly one-half of those obtained from parabolic oxidation. The growth morphology of the products of oxidation of ilmenite was observed with a scanning electron microscope. The effect of growth morphology on the kinetics is discussed, and a probable reaction mechanism is suggested for the oxidation of ilmenite.     

Leaching of complex sulphide concentrate in acidic cupric chloride solutions

The chemical analysis of a complex sulphide concentrate by emission spectrometry and X-ray diffraction shows that it contains essentially copper, lead, zinc and iron in the form of chalcopyrite, sphalerite and galena. A small amount of pyrite is also present in the ore but does not be detected with X-ray diffraction. The cupric chloride leaching of the sulphide concentrate at various durations and solid/liquid ratios at 100 ℃ shows that the rate of dissolution of the ore is the fastest in the first several hours, and after 12 h it does not evolve significantly. If oxygen is excluded from the aqueous cupric chloride solution during the leaching experiment at 100 ℃, the pyrite in the ore will not be leached. The determination of principal dissolved metals in the leaching liquor by flame atomic absorption spectrometry, and the chemical analysis of solid residues by emission spectrometry and X-ray diffraction allow to conclude that the rate of dissolution of the minerals contained in the complex sulphide concentrate are in the order of galena 〉 sphalerite 〉 chalcopyrite.     

氯化物介质矿浆电解法浸出硫化铜精矿

研究了在ＦｅＣｌ３ＨＣｌＮａＣｌ体系中直接电解浸出硫化铜精矿矿浆制取铜粉的工艺条件及机理。试验表明，在阳极初始溶液含Ｆｅ３＋６０ｇ／Ｌ、ＨＣｌ３０ｇ／Ｌ、ＮａＣｌ１５０ｇ／Ｌ，阴阳极电流密度分别为３５０和６００Ａ／ｍ２，１００℃的条件下浸出５ｈ，可获得铜浸出率９８．８％、渣含铜０．３４％、铜粉纯度９７．５％的结果；Ｆｅ３＋浓度是影响铜浸出率最显著的因素，阳极上发生的主要反应是Ｆｅ２＋的氧化；元素硫产生的机理是酸直接分解黄铜矿生成Ｈ２Ｓ，Ｈ２Ｓ溶解后再被Ｆｅ３＋氧化。     

Bioleaching of refractory gold ore （ Ⅲ ）——Fluid leaching Jinya refractory gold concentrate by Thiobacillus ferrooxidans

A novel fluidized-bed reactor was designed and installed for bloleaching in a semi-continuous way, by which a process for biuleaching-cyanidation of Jinya refractory gold arsenical concentrate was studied. The arsenic extraction rate reaches 82.5 % after 4-day batch biooxidation of the concentrate under the optimized condition of pH 2.0, ferric ion concentration 6.Sg/L and pulp concentration 10%. And leached rate of gold in the following cyanida.tion is over 90%. The parameters of three series fluidized-bed reactors exhibit stability during the semi-continuous bioleaching of the concentrate.Armmic in the concentrate can be got rid of 91% after 6-day leaching. Even after 4 days, 82% of arsenic extraction rate was still obtained. The recovery rates of gold are 92 % and 87.5 % respectively in cyaniding the above bioleached residues.The results will provide a base for further commercial production of gold development.     

Extraction behaviours of titanium and other impurities in the decompositio process of ilmenite by highly concentrated KOH solution

To effectively utilize ilmenite and recycle KOH solution,the extraction behaviours of titanium and other associated impurities in the decomposition process of ilmenite by highly concentrated KOH solution were studied.Experiments on the extraction behaviours of titanium as well as other associated impurities of ilmenite such as iron,silicon,calcium,and aluminiurn were carried out.The effects of various parameters,including reaction temperature,KOH concentration,reaction time,alkali-to-ore mass ratio,and particle size on the extraction rate of titanium and other impurities were examined.When the finely ground ore (58-75 μm) reacted with KOH solution (80wt％) in an alkali-to-ore mass ratio of 7:1 at 260°C for 60 min,almost complete extraction of titanium was achieved,while the extraction rate of aluminium was 78％ and that of other impurities was less than 22％.Moreover,high purity (98.2wt％) TiO2 with the anatase structure could be gained in the purification process.     

时空结构视野下旅游客源市场定量初探——以浙江嘉兴乌镇为例

在客源时间分布上,计算乌镇游客游览时间强度指数,得到游客游览时间主要集中在二、三季度,并以7、8月份为最高峰。而在客源市场的分布上,鸟镇已经形成了以浙江为核心,上海、北京等地为一级,安徽、河南等地为二级的国内客源市场。在长三角古村落旅游发展迅速的今天,乌镇与周边的周庄、同里等古镇的竞争日益激烈,而旅游产品的创新、加大宣传迅速占领国内二级客源市场等措施将有助于乌镇在竞争中脱颖而出,占领主导地位。