FP-01浮选泡沫图像处理系统

比较了国内外图像处理技术在浮选过程中应用的三个代表性例子 ;介绍了FP - 0 1浮选泡沫图像处理系统 ;指出了图像处理技术在浮选过程控制中的应用前景。     

难选铁矿反浮选捕收剂的研究与应用现状

综述了国内外铁矿反浮选捕收剂研究及应用现状,论述了我国反浮选脱硅捕收剂研究与开发的主要内容,指出组合药剂是浮选药剂发展的必然结果,开发耐低温、中性的浮选药剂是我国浮选技术的发展趋势。     

浮选设备发展趋势

随着世界经济及国内经济的持续迅速增长和浮选理论研究和浮选设备技术的不断进步,浮选设备的种类不断增加,应用领域也不断扩大,本文综述了近年来国内外浮选设备的发展和应用现状,并提出了今后浮选设备的发展方向。     

泡沫铝材料研究现状分析

概述了泡沫铝材料国内外制备技术及应用研究现状,分析了泡沫铝材料制备工艺及性能优化研究过程中存在的问题,并对泡沫铝材料未来的研究及发展趋势做了简要分析。     

浮选动力学研究进展

简述了浮选动力学的理论研究基础及浮选动力学数学模型在国内外的研究现状.从三大方面对浮选动力学在选矿实践中的实际应用进行了简述:首先介绍了浮选动力学实用性模型在选矿实践中的建立,然后用所拟合的浮选动力学模型来描述与比较实际的选矿试验;其次介绍了用浮选动力学研究理论对矿物浮选行为进行描述、对所使用的浮选药剂的价值及选矿工艺流程的合理性上进行评价与解释;最后从浮选机内外环境的改善及浮选机优化设计的角度对浮选动力学研究进展进行了介绍.综述并根据浮选动力学的研究现状展望了浮选动力学今后的研究发展方向.      

浮选生产过程泡沫状态与药剂控制关系研究

针对泡沫状态与浮选药剂用量的对应关系,采用泡沫图像分析仪与液位计等在线检测设备对浮选生产过程中的泡沫状态进行量化处理,建立泡沫状态与浮选药剂控制之间的对应关系。基于量化后的泡沫特征变量,对浮选药剂用量给出了指导意见,并为后续开展浮选药剂智能控制提供了基础。经过长时间现场观察和大量数据分析,验证了理论研究的合理性,对于提高浮选生产过程的效率和稳定性具有重要意义。     

浮选分离/富集技术在分析化学中的应用进展

浮选分离/富集技术由于投入成本低、工艺简单、快速高效、富集倍数高、浮选结果可以用光谱分析法直接测定等,引起了科研工作者的广泛重视。本文分析了浮选分离/富集技术的研究现状;阐述了接触角、表面电位和气泡吸附量3个浮选分离/富集技术效率控制过程的基本原理;总结了影响浮选结果的主要因素,包括:待分离物、溶液pH值、表面活性剂、浮选添加剂、浮选温度、气流速度、离子强度、有机溶剂等;概括了当前国内外浮选分离/富集技术的主要应用领域;对进一步的研究方向进行了展望。     

国外信息

非可浮浮选:粗颗粒矿物浮选回收技术众所周知,由于粗颗粒矿物在传统浮选工艺中的回收指标不佳,因而一直被认为是非可浮的。但是,最近研究结果发现采用流化床泡沫(FBF)浮选技术能扩展可浮矿物粒度2～3倍,从而提高选矿厂的经济效益。AMIRA P1047就是一项采用流化床泡沫浮选来提高粗粒矿物回收率的工程项目。该项目计划     

气浮浮选法机理及其研究进展

气浮浮选是一个多变量控制的复杂过程,相关机理研究主要涉及界面化学领域。本文从泡沫浮选及气浮溶剂浮选两个方面论述了浮选的基本原理。在泡沫浮选方面,着重介绍了双电层的影响机制;在气浮溶剂浮选方面,将溶剂浮选与泡沫浮选及溶剂萃取进行了对比,介绍了目标浮选物在溶剂浮选体系的转移机制。为了对浮选理论作进一步的阐述,详细论述了捕集剂、起泡剂、pH值及电解质对于浮选分离效果的影响,简要概括了温度、时间以及气体流速的影响。     

PCM法制备泡沫铝的研究现状及应用前景

论述了PCM法 (powder compacting melting) 制备泡沫铝的国内外研究现状,重点对该工艺参数对发泡过程的影响、发泡机理及泡沫铝复合结构进行了讨论,展望了PCM法制备泡沫铝的应用前景.     

浮选过程泡沫图像特征识别研究

在浮选过程中,通过观测矿浆泡沫状态来判断药剂添加量的程度。运用图像检测方法,提取矿浆中泡沫图像特征,获取浮选过程加药量的程度,实现加药量进行调节,浮选过程加药量的自动控制提供条件。     

浮选泡沫图像主成分的分类与识别

通过对大量浮选泡沫图像的分析,获得能够表示泡沫层的特征参数。采用灰度共生矩阵法提取参数特征并对特征参数进行正交变换处理,然后用BP神经网络进行分类,获得不同类别的浮选效果。研究结果表明,对特征参数进行正交变换修正后,大大提高了分类识别的正确率。     

新型实验室XFD-63单槽浮选机的研制

实验室XFD-63单槽浮选机更新换代、技术创新对实验室选矿试验工作发挥着重要作用。通过叶轮无级调速、自动曲柄摆杆刮泡机构的改进,使浮选机结构更加简化,刮泡结构新颖,选别性能优良。     

Recent developments and advances in formulations and applications of chemical reagents used in froth flotation

Over the last two decades, significant advances have been made in the field of chemical reagents used in froth flotation, a solids separation technique whose success depends on the use of a wide variety of both inorganic and organic reagents, including polymers, for controlling the wetting behavior of solid surfaces, particle dispersion or aggregation, and bubble stability. Novel discoveries include new chemistries of reagents, especially collectors, depressants and frothers, new blends of known chemical compounds, new applications of known reagents, and the development of scientific methodologies for reagents design and testing of potential formulations. Even though the most important application of froth flotation has been the processing of raw materials, in recent years new applications of flotation continue to grow. Depletion of easy-to-process, high-grade ores and an increasing demand for clean technologies require new flotation reagents, that are environmentally friendly, more versatile, and economic. This article reviews recent developments of new chemistries for froth flotation, some of which are now available as commercial products, and their applications.     

Effect of Oleic Acid on Froth Properties and Reverse Flotation Performance of Thermal Coal

Reverse flotation was proposed as a potential method for the upgradation of low rank thermal coal. Higher combustible matter recovery in the float could be obtained using reverse flotation method compared to conventional flotation method. In order to reduce the entrainment of fine particles, oleic acid (OA) was used as froth regulator in coal reverse flotation process. Experimental data showed that the total volume of froth product in the absence of OA was almost 3 times more than that in the presence of 0.45 kg/Mg OA dosage. Reverse flotation results showed that the ash content of froth product increased with the increase of OA dosage which indicated that the entrained coal particles could be decreased by the addition of froth regulator OA.     

Bubble and Froth Stabilizing Agents in Froth Flotation

The mineral processing industry relies heavily on froth flotation to beneficiate complex minerals. The performance of the process depends on a multitude of chemical reagents affecting the solid mineral particles as well as the air bubbles used to collect the valuable mineral particles. In flotation, bubbles and froths are transiently stable by the use of a frothing agent or the presence of inorganic electrolytes in the process water. This review presents the primary stages characterizing bubble coalescence. The effect of flotation reagents and inorganic electrolytes on the stability of bubbles and the mechanisms which delay the coalescence of bubbles are discussed. Recently it had been proposed that solid particles external to the flotation system may be intentionally added to stabilize the froth phase, which has attracted attention from the flotation community. This gave rise to additional studies on the topic. The final section of the paper was therefore designed to capture the progress made on this particular subject. The use of solid flotation aids offers a promising future to increase the recovery of valuable particles as these external particles may be customized. The advantage of solid particles over soluble reagents is that they may be recovered and re-used making them environmentally and economically attractive.     

Effect of Froth Structure and Mobility on Plant Performance

Abstract

The role of processes operating in the mineralised froth encountered in production scale flotation machines is discussed in relation to both process operation and mathematical modelling techniques used for simulating process response on complex process flowsheets. The structure of froths (and associated drainage patterns) developed on a continuously operated flotation cell over a wide range of operating conditions is reported. The concept of shear induced drainage in the froth is introduced, where mobility in froths on producing cells is seen to reduce froth separation effects. The relation of shear induced drainage to modern cell design is discussed, particularly in terms of maximising froth separation effects to enhance process separation efficiency.     

从河南某钼矿浮选尾矿中综合回收钼和白钨的试验研究

针对某含钨、钼尾矿进行试验研究,确定了浮选工艺条件,通过小型闭路试验获得白钨精矿含WO356.45%、回收率为69.94%,钼精矿含Mo48.50%、回收率57.06%的指标。     

降低包头白云鄂博稀土精矿成本新工艺研究

在如何降低稀土精矿浮选成本方面进行了探索。将生产中所用的稀土浮选原料强磁中矿更换为强磁扫选精矿的反浮泡沫,不需特别的脱药措施,只采用稀选车间现有的工艺流程和浮选药剂组合方案,即可获得所需的稀土精矿,使每吨稀土精矿的成本降低一半左右。同时,还对从混合泡沫中分选稀土精矿的捕收剂作用机理进行了探讨。