KYZE型浮选柱的发展和应用

介绍KYZE型浮选柱的系统组成、充气器特性和适用范围,分析KYZE型浮选柱适合微细粒选别的特点,KYZE浮选柱表观充气速率范围从0.1 m/min扩展到1.8 m/min,满足从氧化矿到硫化矿等不同性质矿物选别的充气量要求。在国内外多个工业项目的应用,表明KYZE型浮选柱具有较好的选别性能。KYZE型浮选柱不仅可以单独使用,也可以和KYZB型浮选柱配套使用,用在浮选流程的精选作业上,对提高选厂的技术经济指标有较大帮助。     

旋流-静态微泡浮选柱浮选萤石的影响因素分析

旋流-静态微泡浮选柱是一种高效微细粒分选设备,通过逆流矿化、旋流矿化、管流矿化3种矿化方式有序集成,形成高效矿化方式,提高了回收能力。微泡浮选柱分选技术在矿物分选应用中,影响选别指标的因素很多,包括磨矿细度、矿浆浓度、矿浆温度、药剂制度、水质、浮选流程以及浮选柱本身的工作参数。针对低品位难选萤石矿,采用φ50 mm有机玻璃制作的实验室用旋流-静态微泡浮选柱进行分选,讨论了调浆时间、给料速度、循环泵工作压力、充气量和喷淋水等因素对萤石浮选效果影响的试验结果。     

浮选柱对赵庄煤泥分选试验研究

为了有效解决现场煤泥灰分偏高影响最终出厂精煤灰分指标的问题,对赵庄选煤厂煤泥的浮选柱浮选进行了试验研究。利用高斯-米杰里法研究充气量、矿浆浓度、起泡剂用量3种变量对浮选柱浮选试验指标的影响。结果显示,3个变量在利用浮选柱分选赵庄选煤厂煤泥时的最佳值分别为充气量1.8 m3/h、矿浆浓度60 g/L、起泡剂用量200 g/t,在最佳分选条件下的精煤分选指标,产率为75.11%、灰分为10.89%。     

利用微泡浮选柱分选中低品位铝土矿的试验研究

在研究矿石性质的基础上, 利用新型微泡浮选柱对河南某中低铝硅比铝土矿进行了实验室分选研究, 考察了捕收剂、抑制剂、充气量和淋洗水对分选结果的影响。闭路试验结果表明, 在优化条件下, 采用新型微泡浮选柱可得到精矿铝硅比为10.26, 氧化铝回收率87.24%的实验指标。试验证明新型微泡浮选柱对细粒铝土矿分选有良好的应用前景。     

矿用旋流-静态微泡浮选柱的分选原理及参数控制

矿用旋流-静态微泡浮选柱是一种新型高效分选微细粒物料的浮选设备，其影响分选指标的工作参数很多。本文主要讨论了矿物解离度、矿浆浓度和循环泵压力对浮选柱分选指标的影响。此外，简要讨论了浮选柱在选矿回路中的工艺配置问题。     

浮选机节能技术研究的新探索

以浮选动力学理论和叶轮搅拌、混合理论为基础 ,提出了一种新型结构的浮选机 ,并对其叶轮 -定子系统结构形式及参数、运转参数等对功耗的影响及浮选动力学进行了研究 ,在此基础上 ,设计了可有效降低能耗并能满足流体动力学状态要求的半工业样机 ,进行清水试验和半工业带矿试验 ,对比试验均取得了较好的效果 ,在选别指标略优的情况下 ,节能幅度在2 3 %左右     

FXZ-1型浮选柱的研究和工业应用

１ｍ浮选柱已在我国选煤厂成功地使用１年多,其优点是：处理量大,动力消耗低,分选效果好。阐述了５种煤泥的实验室试验结果,指出气泡发生器结构对浮选柱性能有重要影响。对浮选柱的高度、充气量、喷水等因素进行了讨论。     

海南某赤铁矿柱式反浮选试验

为了提高海南某赤铁矿选厂的磁选精矿品位,进行了旋流-静态微泡浮选柱阴离子反浮选试验研究,通过条件试验确定的浮选柱给料速度为230 mL/min,捕收剂用量1 800 g/t,粗选循环泵压力0.14 Mpa,浮选浓度38%,粗选浮选柱吸气量1.0 m³/h。试验结果表明：在给矿品位49.44%的条件下,采用脱硫+1粗1扫反浮选流程,获得了精矿产率为57.37%、铁精矿品位62.62%、铁回收率72.66%的较好指标。试验体现了浮选柱在赤铁矿浮选中分选流程短和分选效率高的优势。     

西南某铜矿浮选柱半工业试验研究

浮选柱半工业试验首先开展了处理量、循环泵压力、充气量等主要浮选柱工艺条件试验,在此基础上完成了72h的连选试验,获得的铜精矿品位为29.20%,回收率为94.99%,高于同期生产的浮选机指标。此外,旋流-静态微泡浮选柱对于各粒级铜矿物均具有较强的回收能力,其对铜矿中的主要铜物相回收率也高于常规浮选机。     

KYZ4380B型浮选柱系统研究与应用

探讨矿物分选对大型浮选柱的要求,分析大型浮选柱工业应用的结构参数,主要对KYZ4380B型浮选柱系统的发泡特性及浮选动力学特性进行研究,同时还对浮选柱的液位和充气量自动控制进行评价。该大型浮选柱系统在某选矿厂的工业应用,取得良好的生产指标。     

高气泡表面积通量充气器气泡特征参数试验研究

充气器生成气泡的特征参数是影响气泡表面积通量的关键因素。利用电导探针法和拍照测径法获取了充气器产生气泡的直径、速度及其分布特征。利用CCD高速相机获取了充气器的气泡分散特征。结合浮选柱的清水试验研究,分析了充气器喷嘴直径和充气压力两个关键参数对气泡特征参数影响。研究表明,KYZ浮选柱充气器能形成高气泡表面积通量的柱内分选环境。工业应用表明,KYZ浮选柱高气泡表面积通量充气器能够实现优异的分选性能。     

Effects of hydrodynamic parameters on entrainment and flotation performance

The separation selectivity and efficiency of the flotation process depends not only on differences in the physico-chemical surface properties of various minerals within an ore, but also on the hydrodynamics of flotation. The hydrodynamics relate directly to many sub-processes of the flotation, such as suspension of particles in the pulp, dispersion of the air into bubbles and the probability of particle–bubble collision. Mechanical entrainment plays a major role in the quality of the flotation concentrate and the separation selectivity. Therefore, the effects of some important hydrodynamic parameters on both the entrainment and the flotation performance were investigated by means of a fractional factorial experimental design. Furthermore, many flotation tests were performed in order to generate sufficient data for use in empirical modelling and neural network based modelling, in light of the results of the experimental design. The adaptability and reliability of the models developed, depending on the treatment of available experimental data, have been studied comprehensively. Evaluation of the observed and predicted results demonstrated that the effect of some chemical and hydrodynamic parameters of the flotation process on both the metallurgical performance and entrainment in the training region, can successfully be predicted, with an error of less than 6%, by using the developed neural networks models without particular assumptions and additional experiments. In order to prove the validation of the empirical and neural networks models developed and to compare their performances, a few additional tests were conducted under predetermined flotation conditions. The results of these additional flotation tests indicated that the neural network models were consistently more accurate than the empirical models with a negligible error.     

白钨精选段浮选柱代替浮选机探索研究

介绍了小型浮选柱在白钨精选段的半工业试验情况,通过调整浮选柱操作,得到比较理想的生产指标。和浮选机相比,精矿品位提高10.83%,回收率提高1.74%,提高了精矿品位,优化了工艺指标,节约了占地面积,为精选段探索技术改造方案奠定了基础。     

管段高紊流强化煤泥柱浮选的应用及作用机理

为了强化煤泥的柱浮选与细粒级回收,调整了旋流-静态微泡浮选床的管流段长度,分析了不同管流段长度下的煤泥浮选效果、产品特性和承载能力变化规律,并结合流体动力学和浮选动力学理论探讨了其强化作用机理。结果表明:管流段长度由1.5 m延长至3.0 m后,在精煤灰分相当的情况下,精煤可燃体回收率提高6.46%;细粒级0.074~0.045 mm和0.045 mm回收率分别提高7.96%和8.41%,设备承载能力提高0.09 t/(h·m2);同时各自增幅都随入料干煤泥量的增加逐渐变大。管流段延长可以增大管流段的紊流动能值,提高颗粒-气泡的碰撞速率,促进整体浮选指标的提升。     

Collection zone kinetic model for industrial flotation columns

The collection zone recovery of a flotation column was modeled using a rectangular distribution function for the kinetic rate constant and a tank in series model with different vessel sizes for the residence time distribution. It was demonstrated that an analytical expression can be obtained and that data from large industrial columns fits well, keeping the parsimony principle by using a simple and practical solution. An example for the estimation of the maximum kinetic rate constant, useful for scale-up purposes, is shown using data from industrial flotation columns.     

浮选柱技术的应用现状及发展趋势

相比于传统浮选机,浮选柱具有结构简单、易于调控、浮选效率高等优势,更适于处理品位低、嵌布粒度细、矿物组成复杂的矿石资源,其研究和应用逐渐成为矿物加工领域关注的焦点。介绍了浮选柱的发展历程和分类,重点阐述了各种新型浮选柱CPT浮选柱、Jameson浮选柱、充填型浮选柱、旋流-静态微泡浮选柱、CCF浮选柱、KYZ浮选柱、CFC浮选柱在矿物浮选中的应用现状,通过与浮选机的浮选指标对比,在处理微细粒难选矿物时,浮选柱具有常规浮选机所不可比拟的分选效果;同时归纳了电解浮选技术、磁浮选技术、流态化浮选技术与柱浮选技术结合的代表性浮选设备—磁浮选柱、电解浮选柱、流态化浮选柱等的应用进展;最后,指出了浮选柱的未来研发方向应侧重于自动控制系统的完善、流体动力学数值模拟的研究以及与综合力场的结合等方面。     

Effect of impeller rotational speed on the size dependent flotation rate of galena in full scale plant cells

The first three rougher cells in the lead circuit of the Elura concentrator (formerly Pasminco Australia Limited) were selected as the plant cells for investigation. Metallurgical surveys were performed and various hydrodynamic measurements taken, allowing the galena flotation rate constant and the bubble surface area flux (S_b) in these cells to be calculated over a wide range of gas flow rates, and at two impeller rotational speeds. It was determined that altering the impeller rotational speed did not significantly change the rate constant dependency on S_b when flotation was considered on an unsized basis.The analysis was further extended to examine the same cells parameters on a size-by-size basis. The results obtained have been used to identify differences in the flotation behaviour of the various particle size fractions, independently of surface hydrophobicity. It is shown that the physical conditions for effective flotation of fine (<9 μm) and coarse (>53 μm) particle size fractions differ substantially, suggesting that a specific hydrodynamic environment will favour a high flotation rate for fine galena, which may be detrimental to the recovery of coarse galena, and vice versa. These observations are in accord with metallurgical practice that suggest that it is difficult to improve fine particle flotation without also compromising coarse particle stability efficiency simply by modifying the cell hydrodynamics alone. A fundamental flotation model was applied to quantify differences in the flotation rate of the various particle size fractions with impeller rotational speed.     

银的赋存特征及其对选矿的影响

国内某大型银多金属矿,由于矿石性质的变化,导致银浮选指标和浸出率都发生了改变。为了查明影响银选矿指标的矿物学因素,使用光学显微镜、矿物自动分析仪(MLA)、扫描电子显微镜及X射线能谱分析等手段对矿石中银的赋存特征进行了系统的研究。结果表明,银主要赋存在辉银矿、银黝铜矿、深红银矿中,分别占64.19%、22.25%、10.37%,且银矿物与方铅矿等硫化物的共生关系紧密。银矿物主要以粒间银、包裹银的形式产出,分别占73.88%、22.27%,其中,包裹部分以脉石包裹为主,占13.47%。银矿物的粒度总体较细,集中在20~75μm,20μm以下部分占22.36%;尤其是20μm以下脉石包裹部分占6.81%,这部分银易损失到浮选尾矿中。矿石中方铅矿与闪锌矿的嵌布粒度较细,共生紧密,在磨矿过程中难以完全单体解离。根据上述研究成果,在保证银的选矿回收率、氰化浸出率,兼顾对铅、锌、硫进行综合回收情况下,建议首先通过银铅锌硫混合浮选后再分离的工艺获得银铅锌精矿和硫精矿,然后对银铅锌精矿进行再磨氰化浸出。     

KYF-70充气机械搅拌式浮选机在精选的应用研究

介绍KYF-70充气机械搅拌式浮选机的结构特点,测定70 m3浮选机在精选段作业的矿浆悬浮能力及带矿条件下的充气量.矿浆悬浮能力测试表明KYF-70充气机械搅拌式浮选机对-45μm含量高于80％的矿浆悬浮能力好,槽内矿浆粒度分布均匀,液面稳定.应用情况表明,KYF-70充气机械搅拌式浮选机应用于精选段作业浮选效果良好,...     

焦家金矿工艺矿物学研究

研究结果表明 ,金的浮选指标取决于金矿物在黄铁矿、脉石中的分布率和金的载体矿物黄铁矿的嵌布粒度以及脉石中金矿物的粒度。矿石氧化使黄铁矿变成褐铁矿也会影响浮选效果 ;金矿物与黄铁矿的解离程度影响金回收率 ;正常氰化条件下 ,金精矿磨得愈细 ,氰化渣含金愈低。该研究成果为优化浮选、氰化工艺条件提供了依据