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机器视觉作为设备操作人员的工具,在泡沫浮选设备的监测中得到了广泛的应用。利用泡沫图像数据集建立预测识别模型,以初级泡沫特征参数为输入,以品位和回收率等浮选指标为输出。根据是否需要手动提取浮选泡沫图像特征,可以将特征提取算法划分为两大类别:一种是基于颜色、形态特征等的传统手动特征提取方法,另一种是基于深度神经网络的自动特征提取方法。本文总结并归纳了近年来浮选泡沫图像特征提取算法领域的研究进展,分析了各种方法的优势和不足,对当前难以人工识别泡沫状态及实现浮选自动化提升浮选效率,具有一定的指导价值。 相似文献
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《有色冶金设计与研究》2016,(3)
采用BIFPS型泡沫图像分析仪得到的泡沫特征参数,实时计算气泡表面积通量,并以此参数为寻优目标,建立了充气量设定值的基本控制规则,并在此基础上实现单个浮选槽的专家系统控制。对比试验及正式投用结果证明,气泡表面积通量对浮选生产具有重要的指导意义。 相似文献
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从混合泡沫中浮选稀土的选矿研究 总被引:2,自引:0,他引:2
本文根据混合泡沫中矿物特性,提出了浮选分离稀土与萤石等矿物的工艺。指出泡沫予先脱药处理,羟肟酸(铵)浮选稀土以及脱泥是解决泡沫分离,回收高品位稀土■矿的技术关键。试验证明该工艺流程对包头矿石有良好的适应性,可从不同矿石的混合泡沫中,获得高品位稀土■矿。 相似文献
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浮选过程泡沫图像特征识别研究 总被引:2,自引:0,他引:2
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。 相似文献
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某金矿选矿系统浮选作业存在矿浆矿化程度较差、泡沫层薄、泡沫虚且载矿效果差的问题,对浮选指标产生负面影响。为了提升浮选指标,减少金属量损失,开展了浮选药剂制度优化试验研究及生产实践。结果表明:新型捕收剂对该矿石浮选效果较好,选择性能较强;采用碳酸钠、硫酸铜、新型捕收剂等组成的新药剂制度,并通过调整优化,矿浆的矿化程度逐渐转好,泡沫层变厚且泡沫载矿效果较好,浮选指标明显提升,在精矿产率略有降低的前提下,精矿金品位提高了1.69 g/t,金回收率提高了1.79百分点,尾矿金品位降低了0.12 g/t,增加了企业的经济效益。 相似文献
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以动力学参数K(浮选速率系数)为依据,来评判黄铜矿、黄铁矿快速浮选分离的可能性.首 先,在不同矿浆浓度、浮选粒度及浮选机转速等条件下考察黄铜矿和黄铁矿纯矿物K值的变化,在一 定程度上阐释了黄铜矿、黄铁矿快速浮选分离的动力学机理及其可能性;同时,为使黄铜矿、黄铁矿快 速浮选分离技术在工业上具有适用性,进一步研究黄铜矿与黄铁矿组成的2种粒级的混合矿在适当 浮选条件下的动力学特性.结果表明,适当的浮选条件,可扩大黄铜矿与黄铁矿之间的浮选速率差异,从而实现黄铜矿的快速优先浮选. 相似文献
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铜矿浮选过程控制模型的参数识别研究 总被引:2,自引:0,他引:2
依据所建立铜矿浮选过程数学模型以及系统的实际运行数据,采用实时最小二乘法进行动态模型的在线识别和某些操作参数的动态补偿,使模型反映更多的过程信息。在线参数辩识结果表明,用实时最小二乘法所确定的模型能很好地预报生产过程,为下一步最佳工况寻优,设计最优化控制系统打下良好基础。 相似文献
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J. LASKOWSKI D. W. FUERSTENAU G. GONZALEZ R. H. URBINA 《Mineral Processing and Extractive Metallurgy Review》2013,34(1-2):135-155
This paper summarizes the results of numerous investigations on the structure, surface properties and flotation behaviour of chrysocolla. Until the late sixties, chrysocolla was considered to be a hydrated copper silicate without fixed mineral composition. Recent articles, however, have revealed that chrysocolla is a definite mineral having an orthorhombic unit cell and a characteristic fibrous structure. The results reported by various researchers seem to indicate that mobile superficial copper ions, as well as the silica skeleton, are responsible for the similarities observed in the surface properties of all chrysocolla samples which prevail in spite of the well known differences in composition of chrysocolla specimens. The equilibrium diagram for the system copper oxide-silica-water has been introduced as a valuable tool for predicting the surface properties of chrysocolla. However, the conditioning pH is the most critical parameter which determines the surface characteristics and the flotation behaviour of chrysocolla. It has been recognized that this mineral is a microporous solid whose nature can be considerably altered by heat treatment around 550°C. This so-called “thermal activation of chrysocolla” could result in the crystallization of individual surface oxides and/or the sintering of the micropores, which in turn significantly enhances the flotation response of copper silicate. Studies of the sulfidization of malachite and chrysocolla have revealed that the sulfidization process produces different sulfide surfaces on natural and thermally activated chrysocolla. It is only in the latter case that the superficial film exhibits the same electrochemical properties as the surface of sulfidized malachite. 相似文献
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为了阐明银含量对方铅矿浮选的影响,提高含银方铅矿中伴生银的综合回收效率,通过全面梳理前人研究成果,对含银方铅矿的资源状况、工艺流程和药剂制度进行了总结。首先,从不同维度和层面(从试验到模拟、从宏观到微观)综述了银含量对方铅矿的影响,其中包括银含量对方铅矿浮选行为及表面接触角的影响。然后,评述了前人利用红外光谱、微热动力学、电化学和量子化学等分析方法开展的有关银含量对方铅矿浮选行为影响机理的研究进展,上述分析方法相互验证,均证实银矿物对方铅矿的浮选有促进作用,且银含量与促进程度呈正相关。最后,针对含银方铅矿今后研究方向和银铅锌矿资源开发,提出科学、合理的建议,如:在现场生产中应尽量避免使用石灰调浆,如必须使用时,应控制好石灰用量,从而减少伴生银的损失。 相似文献
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Ü. Yenial F. Burat A. E. Yüce A. Güney 《Mineral Processing and Extractive Metallurgy Review》2013,34(6):412-421
PET and PVC cannot be separated by gravity separation techniques due to their close density. For this reason, plastic recycling needs other separation techniques. Froth flotation, which is used in mineral processing, could be useful because of its low cost and simplicity. The main objective of this research is to investigate the flotation characteristic of PET and PVC and determine the effects of plasticizers on plastic separation without any alkali pre-treatment. In selective flotation experiments, water bottles and waste water pipes were used for this purpose, and Triton XL-100 N and diethylene glycol dibenzoate were used as plasticizers. Various parameters such as pH, plasticizer concentration, conditioning time, and flotation time were investigated. According to the results, PET particles were floated with 100% purity, and the product remaining in flotation cell (PVC particles) was obtained with 86.1% purity. 相似文献
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基于浮选过程自动控制的特点与要求,根据总体控制方案,确定了浮选作业目标函数,并将总目标函数分解为各作业段的子目标函数,分别寻优,实时控制。这种方法简化了过程模型,适用于复杂的选别流程,可供其他选矿厂参考。 相似文献
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