Grinding-flotation system

Mineral static potential or mineral electrode potential is an important parameter. It plays an important role in flotation. It has been demonstrated that the floatability of minerals has direct relation with electrode potential because the grinding-flotation system is similar to the multi-electrode reaction coupled system. Therefore, it is important to study the variance rules of the mineral electrode potential under different conditions. 

Pulp potential in grinding process, is controlled by many factors, such as oxygen dissolved in pulp, oxidation of iron fine powders fi om the grinding media and particles of sulphide minerals, whose electrochemical interactions are very complex in the grinding-flotation system of sulphide minerals ore (Nakazawa and Iwasaki, 1985). 

Primary molybdenum ores at a relatively coarse grind go through an initial stage of flotation. At Climax Molybdenum, for example, the first separation is made at 35% + 100 mesh. The flotation system uses vapour oil as a promoter and pine oil as frother. A sulfonated coconut oil (syntax) is added to the system to emulsify the oil. 

Gu Guohua, 1998. Redox reaction in grinding and flotation system of sulphide minerals and original potential flotation (Ph.D Thesis). Central South University of Technology (in... 

The flowsheet used in this plant (Figure 19.8) consists of a rod mill-ball mill grinding system and a copper rougher-scavenger flotation circuit, followed by two cleaning stages. Initially, the plant used a rake classifier, but now the rake classifiers have been replaced by cyclones. 

Abstract This chapter reviews the development of froth flotation achieved in the past one hundred years and accounts for the achievements of the theory of flotation of sulphide minerals in four aspects, which are the natural flotahility of sulphide minerals, the role of oxygen in the flotation of sulphide minerals, the interaction of collectors with sulphide minerals, the effect of the semi-conductor property of sulphide minerals and electrochemical behaviors in the grinding system. Furthermore, the purpose of this book is revealed in the end. 

In flotation practice, the reducing environment produced in the grinding system may be useful for the interaction between galena and xanthate to form collector salt and not suitable for the formation of dixanthogen. It may promote the selective flotation separation of galena from pyrite. 

In the open system, the pulp potential after grinding will increase with the process of aeration of agitation and flotation (see Fig. 10.14). Because the flotation of galena needs relatively low potential in which lead xanthate is formed easily on the galena surface. Therefore, the flotation operational time must couple with the change... 

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