Modeling study of the bio-dissolution of copper concentrate …
Using three different particle size distributions (PSD) with the indices (d 80) of 45, 32 and 16 µm of a chalcopyrite concentrate from the main Iranian copper processing plant and two types of bacteria, one and two-step continuous tests were performed in stirred tanks. In the first phase, tests were performed at 50 ± 2 °C using moderate ...
Metals | Free Full-Text | Leaching Chalcopyrite Concentrate …
This article presents a copper leaching process from chalcopyrite concentrates using a low-pressure reactor. The experiments were carried out in a 30 L batch reactor at an oxygen pressure of 1 kg/cm2 and solid concentration of 100 g/L. The temperature, particle size and initial acid concentration were varied based on a Taguchi …
Evolution of size and chemical composition of …
Abstract. © 2018 The Minerals, Metals & Materials Society and ASM International An experimental study was conducted to elucidate the evolution of size and chemical …
(PDF) Evolution of Size Distribution of Copper Concentrate …
The size Experiments were conducted to investigate the effects of the initial particle size and oxygen concentration in the process gas on the size distribution of copper concentrate particles oxidized under suspension-smelting conditions.
A basic guide to particle characterization
size. Particle size measurement is routinely carried out across a wide range of industries and is often a critical parameter in the manufacture of many products. Particle size has a direct influence on material properties such as: • reactivity or dissolution rate e.g. catalysts, tablets • stability in suspension e.g. sediments, paints
Moisture effect on the combustion of a single copper concentrate
When a concentrate with high moisture content is charged, the particle size enlargement due to the agglomeration of concentrate particles causes an abrupt fall in the particle reaction rate. A mathematical model has been presented to study the combustion of a single copper concentrate particle with high moisture content.
The leaching behavior of copper and iron recovery from …
Effect of particle size on copper recovery rate (Leaching conditions:120 g/L H 2 SO 4, temperature of 70 °C, ... A novelty process to remove copper and recover iron concentrate from low-copper PyC has been successfully demonstrated by reduction roasting-leaching-magnetic separation. The results shown that the recovery rate of …
(PDF) Effect of particle size and liberation on flotation of a …
Flotation is a physicochemical process that has been used for more than a century in the concentration of copper ores. Mineralogy, particle size, degree of liberation, collector type and dosage ...
Guidance on Classification of Copper Concentrates for …
4. Particle size Copper concentrates have particles sizes <100 µm. Table 3 summarizes the particle size distributions of 23 copper concentrates and concludes on a typical median particle diameter of 27 µm. The respirable fraction (<10µm) is typically less than 33%. Particle size distribution Range 10th P 50th P 90th P D50 - µm 6-80 16 27 55
Effects of particle size on flotation performance in the …
The tested granular material was copper ore of particle size 0–2 mm and relative moisture content of 0.5–11%. ... and particle size of the flotation concentrate were determined and the best ...
Common & Basic Formulas for Mineral Processing …
From these samples the essential information is derived by means of analyses for metal content, particle size distribution, and content of water or other ingredient in the ore pulp. ... For example, a perfect copper concentrate for an ore containing copper only as chalcocite would run 79.8% copper, but if the smelter is best …
Combined Effect of Operating Parameters on Separation
Considering copper recovery, concentrate collection time, collector dosage, and pulp density were the most significant variables, in decreasing order of importance. Also, the separation efficiency was mostly influenced by the concentrate collection time. ... Mineralogical studies, such as particle size and degree of liberation …
(PDF) CHEMICAL COMPOSITION AND DUST GENERATION OF COPPER CONCENTRATE …
Experiments were conducted to investigate the effects of the initial particle size and oxygen concentration in the process gas on the size distribution of copper concentrate particles oxidized ...
Evolution of Size and Chemical Composition of Copper Concentrate
An experimental study was conducted to elucidate the evolution of size and chemical composition of La Caridad copper concentrate particles during oxidation under simulated flash smelting conditions. Input variables tested included particle size and oxygen concentration in the process gas.
Modeling study of the bio-dissolution of copper …
Using three different particle size distributions (PSD) with the indices (d 80) of 45, 32 and 16 µm of a chalcopyrite concentrate from the main Iranian copper …
Copper Concentrates
The production of concentrates implies the crushing and later milling of the ore down to a particle size allows releasing copper by flotation. The concentrates from different regions have approximately between 24% up to 36% of copper. Copper concentrates are then submitted to a final filtration and drying process to decrease the humidity to 8-9 ...
Process Integration of Sulphuric Acid Leach and Particle Size
Request PDF | Process Integration of Sulphuric Acid Leach and Particle Size Fractionation for Cleaner Copper Concentrate Production by Enhancing the Radionuclide Mobility | The growing demand of ...
Flotation of Gold and Gold-Bearing Ores
Untarnished gold of the appropriate particle size has been found to readily float with only a frother (Wang and Poling, 1983, ... Maintenance of a high copper-concentrate grades when clay minerals are present requires that gangue depressants be used. Silicates, guars, ...
Influence of particle size on copper recovery from sulfide …
Meanwhile, the effect of different particle sizes on the rate of the copper leaching was also investigated, and it was shown that the particle size affects the bioleaching rate significantly in ...
Distribution of Copper, Iron, and Sulfur in Copper Concentrate
The distribution of copper, iron, and sulfur during the oxidation of La Caridad copper concentrate particles under simulated flash smelting conditions was studied in a laboratory reactor. Six wet-sieved size fractions and the unsieved copper concentrate were oxidized at 1123 K and 40% and 70% O2 by volume in the process gas during the …
The Challenges and Prospects of Recovering Fine Copper …
Flotation is a common mineral processing method used to upgrade copper sulfide ores; in this method, copper sulfide mineral particles are concentrated in froth, and associated gangue minerals are separated as tailings. However, a significant amount of copper is lost into tailings during the processing; therefore, tailings can be considered …
Evolution of Size and Chemical Composition of …
In this paper, the terms initial particles and feed particles are used as synonymous. The chemical composition of all sieved fractions and the unsieved concentrate determined by AAS and gravimetry techniques are shown in Figure 3. The results showed that the copper content in the particles decreased as the pa…See more on link.springer
Copper Concentrate
WEBParticle density, shape, and size as well as size distribution, concentration, and composition influence the settling characteristics. Basically, a particle tends to settle …
(PDF) The Role of Particle Size and Shape on the Recovery of Copper …
The Role of Particle Size and Shape on the Recovery of Copper from Different Electrical and Electronic Equipment Waste. ... fully floated and a copper concentrate assayi ng 82.11% content was ...
Evolution of Size and Chemical Composition of …
... From the cumulative particle size distributions, 80% passing particle sizes (P80) and the product dust fraction were calculated. For the purposes of this study, …
Flotation rates and particle size distribution in the copper …
ABSTRACT. Flotation plant "V.Krivelj"- FR Yugoslavia, treats a porphyry copper ore and produce the copper concentrate. The main sulphide copper mineral is chalcopyrite. However there is a small amount of chacocite while the major sulphide mineral is pyrite. Copper contents in the ore body varies about 0.36% and sulphur content is less than 3%.
Integration of fine grinding and H2SO4 leach for the …
Thus, fine grinding is required to liberate individual minerals by reducing the particle sizes. Compared to the particle size of the original copper concentrate (Fig. 4 a-1, 2, 3 and 4), the 10-min fine grinding largely reduced mineral particle sizes in Fig. 4 (b-1), which is in close agreement with the statistically meaningful PSDs in Fig. 1.
Distribution of Copper, Iron, and Sulfur in Copper Concentrate …
The distribution of copper, iron, and sulfur during the oxidation of La Caridad copper concentrate particles under simulated flash smelting conditions was studied in a laboratory reactor. Six wet-sieved size fractions and the unsieved copper concentrate were oxidized at 1123 K and 40% and 70% O2 by volume in the process …
Optimization of Feed Blending Process for Copper Smelter
The two concentrate samples were taken at different point of time for a given blend from the dryer outlet before the feed point of smelter and analyzed for particle size. The particle size distribution for both the samples is shown in Fig. 3. A wide variation in the particle size, particularly finer fraction, is observed. This variation in ...
Flowsheet Development for Copper Concentrate Quality
The distribution of the valuable elements (Cu, Pb and Zn) as a function of the particle size in the copper concentrate is shown in Table 2. It shows that the highest distributions of the valuable minerals are in the sizes coarser than 20 (mu) m, which was suitable for flotation separation. In general, the results show no preferential ...
Analysis of the Effects of Grind Size on Production of …
In the production of copper concentrate, productivity is the efficiency with which the low grade copper su/oxide ore is concentrated into high grade copper concentrates. The process of lphide ... stated that, comminution involves the progressive reduction of particle size to cleanly liberate particles of valuable minerals such that, they can be ...