320m~3充气机械搅拌式浮选机工业试验研究

320 m3充气机械搅拌式浮选机是我国目前单槽容积最大的浮选设备,本文介绍了大型浮选机的结构特点、动力学试验和工业试验情况,试验表明浮选机搅拌力强,槽内矿粒分布均匀,浮选机单台富集比铜达20.62,硫达71.44,功耗较国外同类型浮选机节省5.88%。该浮选机的成功研制标志着我国完全掌握了浮选设备大型化关键技术。     

BGRIMM浮选机放大方法与技术

低品位矿产资源高效开发对大型浮选装备技术有强烈需求。几十年来,世界范围内浮选装备的研究主要致力于设备的大型化。浮选机放大方法是浮选装备大型化的关键问题。简要分析了世界上主要浮选装备的大型化历程及其放大方法。阐述了我国BGRIMM系列浮选机的放大方法。BGRIMM系列浮选机的放大方法从相似放大理论、计算流体力学仿真优化和工业试验验证三个方面实现浮选装备的大型化。提出了以平均叶轮搅拌雷诺数相等、以几何相似及悬浮相似为核心的浮选设备放大方法。通过动力学准数分析论证了系列浮选机一致的动力学特性。建立了准确的浮选机CFD仿真优化模型,通过CFD辅助放大设计实现了大型浮选机细节优化。工业试验研究作为浮选机放大研究的关键环节,验证了大型浮选机优良的动力学性能。放大方法指导了BGRIMM系列浮选机的大型化,推动了低品位矿产资源的高效开发。     

BGRIMM浮选机放大方法与技术

低品位矿产资源高效开发对大型浮选装备技术有强烈需求。几十年来,世界范围内浮选装备的研究主要致力于设备的大型化。浮选机放大方法是浮选装备大型化的关键问题。简要分析了世界上主要浮选装备的大型化历程及其放大方法。阐述了我国BGRIMM系列浮选机的放大方法。BGRIMM系列浮选机的放大方法从相似放大理论、计算流体力学仿真优化和工业试验验证三个方面实现浮选装备的大型化。提出了以平均叶轮搅拌雷诺数相等、以几何相似及悬浮相似为核心的浮选设备放大方法。通过动力学准数分析论证了系列浮选机一致的动力学特性。建立了准确的浮选机CFD仿真优化模型,通过CFD辅助放大设计实现了大型浮选机细节优化。工业试验研究作为浮选机放大研究的关键环节,验证了大型浮选机优良的动力学性能。放大方法指导了BGRIMM系列浮选机的大型化,推动了低品位矿产资源的高效开发。     

680m3充气机械搅拌式浮选机工业试验及应用

低品位矿石入选比例和选矿厂规模的日益增大,都对超大型浮选装备的处理能力、单机性能、智能化水平提出了更高的要求。680m_³超大型浮选机作为目前世界上容积最大的充气机械搅拌式浮选机,它的研制成功代表了我国浮选装备的研发能力及其智能化水平。研制过程中,针对超大型浮选机大型化的技术需求及应用特点,围绕浮选动力学、设备结构、智能控制三个方面,开发出了六项主要浮选装备创新技术,包括：浮选动力学调控技术、气泡矿化技术、流场控制技术、泡沫富集调控回收技术、智能优化控制技术和云平台数据存储与可视化操控技术。新研制的680m_³超大型浮选机被应用于铜尾矿再选工业应用中,形成了超大型浮选机尾矿再选的短流程浮选新工艺,实现了对尾矿中粗粒连生体矿物的有效回收,泡沫产品中+74μm矿物含量达30%以上,单机富集比8以上,并获得整个选厂综合回收率提升1.48个百分点的显著效果。     

我国目前最大的浮选机问世

北京矿冶研究总院、武钢大冶铁矿共同研制的JJF-20型浮选机,冶金部已于1982年6月初组织鉴定,颁发了技术鉴定证书,同意基本定型,批量生产。这是我国目前槽容最大的自吸式机械搅拌浮选机。该机研制成功,为我国浮选厂的大型化、现代化、自动化创造了条件。     

浅谈我国浮选设备的现状及发展方向

近几年来,我国浮选设备无论是规格还是品种,都有了较快的发展,除改造现有的仿苏米哈诺布尔(A 型)浮选机外,还相继研制出仿美国丹佛D-R 型的CHF-X、XJC 充气式机械搅拌浮选机,仿美国维姆科(Wemco)型的JJF、XJQ 自吸式机械搅拌浮选机等(附表),开始向多机种、大型化迈进。1.CHF-X、XJC 充气式机械搅拌浮选机这是我国目前应用较多、较好的一种新型浮选设备。CHF-X 的规格有14(双机构)米~3、8米~3、7米~3、4米~3、3.5米~3、2米~3,XJC 的规     

国外浮选设备的发展及应用

作者较翔实地介绍了国外浮选设备的研制和应用情况,总结出国外浮选设备发展的两个特点,即浮选机大型化和浮选柱在细粒浮选中的应用。     

8米~3机械搅拌充气式浮选机的生产实践

前言近年来国内外选矿厂的浮选设备,随着向大型化发展的同时,各种新型“机械搅拌充气式浮选机”相继问世,並被广泛地采用于新、扩建的选矿厂,及将旧有机械搅拌式浮选设备,如FW型、米哈诺布尔型,改造成充气式     

新型微细粒浮选机与机械搅拌浮选机的对比工业试验研究

介绍长沙矿冶研究院新型微细粒浮选机的工作原理及特点,并进行工业试验研究。结果表明,同传统机械搅拌浮选机相比,新型微细粒浮选机获得了较好的浮选指标,一次精选可获得84.01 g/t的金精矿,而传统机械搅拌浮选机需三次精选。新型微细粒浮选机具有富集比高、工艺流程相对简单、能够实现节能降耗的特点,是一种应用前景广泛的细粒浮选设备。     

KYF-200型浮选机的工业应用

KYF-200型充气机械搅拌式浮选机是北京矿冶研究总院研制的超大型浮选设备,也是目前我国工业应用的大型浮选设备。对KYF-200型浮选机在江西铜业集团大山选矿厂的工业应用进行简要介绍,工业应用表明KYF-200型浮选机具有良好的机械性能和工艺性能,具有全面推广应用价值。     

Flotation characteristics of Shenfu coal macerals

The flotation characteristics of Shenfu coal macerals was researched. Taking flotation recovery and enrichment of macerals as the evaluation objects, the influence of the agent dosage, pulp concentration, impeller speed and aeration rate on the separating effect was investigated. And the optimum process conditions of flotation were confirmed. The results show that the agent dosage, pulp concentration, impeller speed and aeration rate have a significant impact on flotation recovery and enrichment of macerals. The float recovery was 73.28% and enrichment ratio of vitrinite was 83.89% when CTAB dosage of 1.0 kg/t, pulp concentration of 100 g/L, impeller speed of 1 700 r/min and aeration rate of 0.25 m³/(m²·min) were used. The tailings yield was 60.30% and enrichment ratio of inertinite was 61.44% when CTAB dosage of 0.5 kg/t, pulp concentration of 100 g/L, impeller speed of 1 700 r/min and aeration rate of 0.20 m³/(m²·min) were used.     

低品位高铁铝土矿浮选脱硅试验研究

低品位高铁铝土矿矿石硬度较高而易过磨,造成浮选指标恶化。通过QEMSCAN分析磨矿产物各粒级组成,发现磨矿产品粗、细粒级两级分化严重且大部分三水铝石矿物在细粒级矿样中富集。考查了磨矿细度、抑制剂添加量、高分子调整剂添加量、捕收剂用量与浮选矿浆浓度等单因素对浮选的影响并确定最优浮选条件。在最优浮选条件下进行闭路试验,取得了精矿氧化铝含量54.47%、铝硅比7.02、氧化铝回收率75.96%的良好浮选指标。     

Improving flotation energy efficiency by optimizing cell hydrodynamics

Flotation is not a particularly energy intensive process. Therefore, flotation optimization has traditionally been focused on grade and recovery performance improvements. However, with the growing need for energy efficiency and the dramatic increase in flotation cell size in recent years it is worth considering how well energy is utilised within flotation cells. In conventional flotation cells a certain amount of energy is required to meet the basic requirements for flotation (air dispersion, solids suspension and particle-bubble collision). This paper investigates how that energy is dissipated in the flotation cell to determine the most efficient use of the imparted energy. The distribution of turbulence and its effect on flotation kinetics are investigated in a mechanical 3 m³ flotation cell for a range of hydrodynamic conditions. The effect of the different conditions are evaluated considering the Power Number (N_P); a dimensionless number that is a useful hydrodynamic indicator as it represents the ratio of energy added to the flotation cell dissipated as shear to that used to generate bulk flow. Results show that flotation rate in the collection zone and the fraction of the cell with higher turbulence increases as more of the power drawn by the impeller is dissipated as shear in the impeller-stator region (higher Power Number). This should promote higher collision rates and more efficient use of the energy imparted in the flotation cell.     

特大型320m~3浮选机在某铜钼矿的应用实践

特大型320 m3浮选机在工业生产上首次实现规模化应用,经过一年多运行,设备运转连续稳定,浮选技术指标优越,浮选作业成本得到降低。在铜原矿品位0.348%的情况下,获得铜精矿品位21.50%、铜回收率86.30%的技术指标,与同期160 m3浮选机生产铜精矿品位提高0.71%,铜回收率提高0.68%,年多回收铜金属量294.66 t,为企业创利润1 473.3万元。大型高效化设备在生产实践中起到的提高技术指标、降低生产作业成本,提高企业市场竞争力作用愈加明显。     

高铝高硅铝土矿重选—浮选联合分级脱硅研究

我国有大量高硅铝土矿资源,单一重选或浮选法往往难以高效且经济地回收铝土矿。本文以云南昭通地区一水硬铝石型高铝高硅铝土矿为研究对象,其含Al_2O_367.25%、SiO_213.50%、铝硅比(A/S)4.98,针对性地采用重选—浮选联合分级脱硅流程,即粗粒级螺旋溜槽重选脱硅富集,细粒级螺溜尾矿水力旋流器脱泥后再浮选脱硅,分别产出合格的粗粒重选精矿和细粒浮选精矿,获得产率70.62%、含Al_2O_371.62%、回收率75.43%、A/S 8.02的高品质铝土矿总精矿。本研究提出的重选—浮选联合分级脱硅工艺对类似高铝高硅铝土矿资源的经济高效选矿富集具有指导意义。     

萃取浮选法从浮选金尾矿中提金

系统地试验了四类化合物对尾矿中金的捕收性能,通过浮选试验,找出了从尾矿中提取金的最佳捕收剂一次乙基二甲基二矿代氨基甲酸酯,它可将尾矿中金由５ｇ／ｔ提高到２２５０ｇ／ｔ以上,富集比高达４５０。为工具开发应用打通了道路,也为我国资源充分利用的研究提供了一条可行笥方案。     

Interfering ions in the flotation of a phosphate ore in a batch column

The “Barreiro” carbonatite complex is located in Araxá, MG, Brazil. The production of apatite concentrate from this ore started in 1978 and the current production capacity is 800,000 tonnes.The ore is subjected to the following unit operations in the concentrator: grinding, classification, low field magnetic separation, desliming, apatite and barite flotation, high field magnetic separation, filtration and drying.Barite and apatite flotations were performed in 300 ft³ (8.5 m³) Wemco mechanical cells until 1992. The replacement of the mechanical cells by flotation columns occurred in two stages: fine fraction flotation circuit in 1993 and coarse fraction flotation circuit in 1994. All the 66 mechanical cells were replaced by 6 flotation columns (3.0 m × 4.5 m × 14.5m), resulting in improved selectivity and recovery and significant reductions in the consumption of the collectors for barite and, mainly, for apatite.The flotation process control monitoring in laboratory bench scale mechanical cells was then inadequate due to the discrepancy with the industrial practice. A specific methodology was developed for batch column flotation testing. The technique was checked by means of comparison with the industrial plant practice of apatite and barite flotation, showing its reproducibility and reliability for process development testwork.The batch flotation column was utilised to evaluate the effect of ions (dosed in the conditioning stage) on the flotation of barite and apatite. Flotation tolerance limits were established for the ions calcium, magnesium, phosphate, fluoride and rice bran oil soaps. Due to the fact that these ions were dosed as sodium salts (in the case of anions) or as chlorides (in the case of cations), the effect of sodium and chloride ions was also assessed (tests with the addition of sodium chloride).The results led to the environmental benefit of a full process of water recirculation in the concentrator without impairing the flotation performance.     

铁闪锌矿中稀有金属铟的高效提取应用研究

针对云南某含铟硫化铅锌矿高铁的特点,开展了选冶联合技术攻关。通过优化浮选工艺及药剂制度,锌精选使用富集比更高浮选柱代替浮选机,使用起泡性更清脆MIBC代替2#油;在湿法提铟过程中,氧化锌低酸浸出液直接萃取工艺基础上,增加了低酸浸出液锌粉置换,置换沉铟渣浸出、置换后液空气氧化等新工艺使冶炼厂稀有金属铟的处理能力从30吨/年提高到50吨/年以上,金属铟的总回收率由原来的48.75%大幅度提高到65.12%,取得了较好的经济效益。