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By adding reagents into the flotation cells to adjust the physical and chemical properties of a mineral, the desired mineral can float to the top of the flotation cells and …Web
Antimony flotation is a complicated industrial process with an unknown system structure. Manual manipulation is still widely used by observing the froth appearance, which relies on operators' experience. Therefore, this paper proposes a reagent predictive control strategy for the antimony flotation process based on …Web
1 Introduction. Froth flotation is the most popular mineral separation method. By adding reagents into the flotation cells to adjust the physical and chemical properties of a …Web
Computer vision-based flotation reagent control (FRC) is a nonintrusive, cost-effective, and reliable technique for changing a deviated flotation status to an optimal status, which produces a ...Web
Kaartinen et al. developed a reagent dosage control system based on expert rules in terms of empirical knowledge between image variables (froth color, bubble size distribution, froth speed, …Web
The sulfide minerals of such ores are readily concentrated by froth flotation, but the oxidized ores are difficult to concentrate by flotation (Holman et al., 1977; Mendiratta, 2000; Drzymala 2007 ...Web
[1, 2]. Figure 1 shows the principle of froth flotation. Figure 1: Principle of flotation [3]. Froth flotation can be regarded as a system [3], with various sub-processes and interactions. For flotation to take place an air bubble must be able to attach itself to a particle in the mineral suspension known as flotation pulp.Web
Froth flotation is a commonly used technique to concentrate minerals for metal recovery [5 ]. However, during the flotation process, a fraction of valuable …Web
Flotation reagentsIt is estimated that approximately 2 billion tonnes of ore are treated by froth flotation annually. Thus, the flotation process consumes a huge amount of reagents in the form of collectors, frothers, depressants and …Web
The ores are concentrated through froth flotation in the form of copper-sulfide or copper-iron-sulfide minerals (e.g. chalcopyrite, chalcocite and etc.), which are then melted in a high-temperature reheating furnace (± 1250 ℃). ... Copper recovery can be increased by optimizing the flotation reagent. It is found that the ... The relative ...Web
The only reagent with an increasing dosage is AF70 with 15 g/t comparing to the current consumption in the plant of 10 g/t. 5 Conclusions 1) A two-level full factorial …Web
Reagent addition is an important operation in the froth flotation process. In most plants, it is manually regulated according to the operator's experience, by observing the surface features of ...Web
The normal consumption of pine oil in single-stage flotation is between 0.05 and 0.15 lb. per ton of ore entering the plant, that of cresol being between 0.1 and 0.4 lb. per ton. SURFACE TENSION. Froth Flotation Frothers are chemicals used to strengthen the SURFACE TENSION of an air bubble. They do not create air bubbles.Web
Abstract. In the quest of new, less hazardous, and more ambient-friendly froth flotation reagents, the use of biosolids or humic acids as both collector and frother for the concentration of copper sulphide ores was investigated. Rougher flotation tests were conducted in Denver cells on a laboratory scale, and metallurgical indicators such as ...Web
The new proposed method was evaluated by a case study in pilot plant flotation column at Sarcheshmeh copper plant. The chemical reagents dosage, froth height, air, wash water flow rates, gas ...Web
Abstract. Copper oxide minerals are important copper resources, which include malachite, azurite, chrysocolla, cuprite, etc. Flotation is the most widely used method for the enrichment of copper oxide minerals in the mineral processing industry. In this paper, the surface properties of copper oxide minerals and their effects on the …Web
The reagent dosages of 12 g/t Z11, 11 g/t AP407, 3 g/t AF65 and 15 g/t AF70 produced the maximum Cu recovery (86.44%). The collector distribution demonstrated …Web
At present, the coal flotation process relies on artificial recognition of froth features for adjusting the reagent dosage, which cannot realize the optimal control of the quality of the clean ...Web
In addition, in, bubble sizes were also found to be suitable for controlling the dosage of sphalerite activator–copper sulphate. In, according to the bubble size, a feedback control circuit of flotation reagent dosages was designed. These researches demonstrate that the stability and index performance of the flotation process can be ...Web
reverse flotation reagent addition. Based on the froth images and transformer algorithm, the flotation dosing model automatically updates the reagent …Web
In addition, an increase of 1–2% in recovery or grade is economically remarkable in copper flotation plants. Therefore, the reagent dosage control is a very important aspect of the flotation strategy in commercial plants. In recent years, the reagent dosage control has attracted great interest of both academic and industrial researchers.Web
In this paper, the main and interaction effects of chemical reagent (collector and frother) dosages on the copper flotation performance using response surface methodology in …Web
distribution, froth speed, bubble collapse rate, and bubble load) and reagent dosage in zinc flotation. Xie et al. [15] proposed a sensitive froth image feature-based reagent addition control strategy based on the interval type II fuzzy control method. However, in most of these studies, only feed grade and froth features were taken as inputs.Web
PDF | Reagent addition is an important operation in the froth flotation process. In most plants, it is manually regulated according to the operator's... | Find, read …Web
The new proposed method was evaluated by a case study in pilot plant flotation column at Sarcheshmeh copper plant. The chemical reagents dosage, froth height, air, wash water flow rates, gas holdup, Cu grade in the rougher feed, flotation column feed, column tail and final concentrate streams were used to the simulation by …Web
Recently, the dynamic PDF of bubble size is utilized to evaluate operating status of reagent dosage in copper flotation process [18]. A novel bubble size distribution based reagent dosage predictive control algorithm is proposed to implement the product indices in copper roughing circuit.Web
In this paper, a novel reagent dosage predictive control method based on probability density function (PDF) of bubble size is proposed to implement the indices of …Web
Model predictive control (MPC) is a method that can be employed to optimise reagents' use. Experience suggests that linear MPC models are inadequate to explain reagent effects, and non-linear models for flotation effects are required. This study uses data from a lead-zinc flotation operation to compare linear and non-linear dynamic models.Web
In the concentrate obtained using cleaner flotation tests, the Co grade increased to 0.49% and Co recovery increased to 90.56%. These results show that froth flotation, carried out with the appropriate reagents, is a successful method for recovering Co by enriching the flotation plant tailings.Web
flotation cells, the concentrate is usuall y obtained by scrapin g the froth out of the upper f roth layer, so researchers usually focus on the froth structure characteristics o f the froth layer toWeb
ZHU Jian-yong, GUI Wei-hua, YANG Chun-hua. Probability density function of bubble size based reagent dosage predictive control for copper roughing flotation [J]. Control Engineering Practice, 2014, 29: 1–12. Article Google Scholar ZHAO Hong-wei, XIE Yong-fang, JIANG Zhao-hui, XU De-gang, YANG Chun-hua. An intelligent optimal …Web
The copper recovery (85.9%) and copper grade (6.7%) of a rougher concentrate obtained using humic acids as main collector for the flotation of a copper sulphide ore from Chile, were very similar to those of a copper concentrate produced by froth flotation under the same conditions with a xanthate type commercial collector.Web
