what ph is commonly used in copper ore flotation

20-11-2020· Hematite reverse flotation uses anionic or cationic collectors to remove gangue minerals from the raw ore and leave iron minerals in the flotation cell. Anionic collector: Use the fatty acid collector for reverse flotation after calcium ion activation. Make sodium hydroxide or sodium hydroxide mixed with sodium carbonate to adjust the pH to ...

26-01-2021· Copper sulphide ore deposits are of great economic significance for copper extraction. In order to enrich copper sulphides, froth flotation at alkaline pH is typically applied to reject associated gangue minerals, in particular pyrite before the subsequent pyrometallurgical treatment to extract copper from copper sulphides [].The selective separation in flotation is driven by a difference in ...

what ph is commonly used in copper ore flotation. Introduction to Mineral Processing. Lime is often used to raise the pH of the pulp and also reduce the flotation of iron ... are negatively charged at the pH commonly used for bulk sulfide flotation, namely 11. Read more.

25-03-2019· (1) Flotation reagent that is soluble in water generally using the method of formulating into an aqueous solution. Such as xanthate, copper sulfate, water glass and so on. (2) For some flotation reagents that are insoluble or poorly soluble in water, they can be dissolved to a special solvent and added into ore pulp.

01-11-2013· Laboratory rougher flotation tests were conducted with two samples of Cu–Mo ores in fresh water and in sea water as a function of pH. In both cases Cu recoveries were slightly lower in sea water than in fresh water for a wide range of pH (pH 7–12). Flotation of molybdenite was however strongly depressed in sea water at pH higher than 9.5.

Table 1: Grade/recovery performance of a hypothetical copper ore flotation process. Product % Weight % Cu Assay Feed 100 2.09 Concentrate 10 20.0 Tailings 90 0.1 (a) From Table 1, the Ratio of Concentration can be calculated as F/C = 100/10 = 10. If only

A high pH is important in copper ore processing to maximize this mineral's flotation properties. Most copper ore slurries tend to be acidic. Plants typically add lime to the slurry in the mill or floatation circuit, increasing its alkalinity. A typical copper operation contains many flotation cells, often with a pH …

The heptahydrate form is commonly used. It is used in the metal industry, in the flotation of base metal ores. It can be used alone or in combination with cyanide. Commercial deliver is mostly made in 25 kg and 50 kg bags. It is used as a depressant for the flotation of Pb-Zn, Cu-Zn and Cu-Pb-Zn ores, at alkaline pH, for siphalite.

Effective flotation collector reagent selection is dependent on the sulphide minerals present, their mineral associations in the ore, and circuit characteristics. Because an ore typically has more than one copper sulphide mineral type, often a combination of sulphide flotation collectors is used to maximize metallurgical performance.

20-02-2021· When flotation of various non-ferrous metal sulfide minerals with yellow drug type trapping agent (such as flotation of copper, lead, zinc, and other sulfide minerals from the ore), as the ore usually contains a certain amount of iron sulfide minerals, such as pyrite, albite, magnetic pyrite or sulfur arsenopyrite, etc., with lime suppression of iron sulfide minerals is one of the main methods ...

laboratory scale batch flotation tests of two sulphide ores at two grinds (80% passing 150 µm, 80% passing 212 µm). Copper mineralisation at Kansanshi occurs as both vein-hosted mineralisation, and to a lesser extent sediment-hosted mineralisation. Later breccia-hosted and supergene

high pH is important in copper ore processing to maximize this mineral's flotation properties. Most copper ore slurries tend to be acidic. Plants typically add lime to the slurry in the mill or floatation circuit, increasing its alkalinity.

(i) Ore properties i.e. grade, minerology, degree of oxidation, liberation of minerals. REAGENTS USED IN SULPHIDE FLOTATON Commonly used reagents in industrial flotation plants are Collector, Frother, Activator, Depressants, pH modifier. Amongst above, collectors are the most important reagents which play critical role in sulphide flotation.

08-06-2016· Has been used to float metallic and oxide copper ores. Also good to float carbonaceous or graphitic impurities from lead-zinc ores. Marsperse CB: A water soluble ligno sulfonate. 5-10% solution.1 to .5: A dispersing agent similar in action to Quebracho. Used in phosphate flotation. Methyl Amyl Acetate: A water white liquid with a high boiling ...

Sodium Isobutyl Xanthate (MC-CIBXS) Historically been considered a good choice for the flotation of sulphide ores such as copper, lead, nickel and zinc. Dithiophosphate and Mercaptobenzothiazol Blend (MC404) A mixture of dithiophosphate and mercaptobenzothiazol widely used in tarnished and secondary copper ore flotation, also used in tarnished lead and zinc ore flotation in alkaline circuits.

BULK FLOTATION OF COMPLEX COPPER ORE FROM SIOCON ... As a result, modifiers that regulate the pH are of great importance. The most commonly used pH regulators are lime, soda ash and, to a lesser extent, caustic soda. In sulfide flotation, however, lime is by far the most extensively used.

Copper is most commonly present in the earth's crust as copper-iron-sulphide and copper sulphide minerals, for example, chalcopyrite (CuFeS2), bornite (Cu5FeS4) and chalcocite (Cu2S).

11-04-2019· Xanthate, as the flotation collector with strong collection effect, is mainly used to enhance the hydrophobicity of the mineral surface to meet the requirements of flotation.Xanthate is commonly used in the flotation process of sulfide minerals. Xanthate is a combination of alcohol, sodium hydroxide and carbon dioxide, which is an anionic collector.

The flotation pH in most of the plants is above 10 and most often over 11. The relatively high pH used in the operating plants is not designed to depress pyrite, but rather as a frother modifier. In reality, the higher pH produces a stable froth with better carrying power than at a lower pH for the majority of porphyry copper- molybdenite ores.

16-05-2016· Although basic porphyry copper flotation and metallurgy has remained virtually the same for many years, the processing equipment as well as design of the mills has continually been improved to increase production while reducing operating and maintenance costs. Also, considerable attention is paid to automatic sensing devices and automatic controls in order to assure maximum metallurgy and ...

Commonly sulfuric acid is used as a leachant for copper oxide, although it is possible to use water, particularly for ores rich in ultra-soluble sulfate minerals. [ citation needed ] In general, froth flotation is not used to concentrate copper oxide ores, as oxide minerals are not responsive to the froth flotation chemicals or process (i.e.; they do not bind to the kerosene-based chemicals).

copper flotation use of lime icas2017conference. Improving copper flotation recovery from a refractory . Lime is commonly used as a pH regulator and depressant against iron minerals during the flotation recovery of copper minerals from copper porphyry sulfide ore.

10-08-2015· The neutral point in the pH scale is 7.0, and the alkalinity of a pulp normally ranges from 7.0 to 8.5, although there are cases where a pH value as high as 13.0 has to be maintained.

Keywords: flotation, process optimization, Taguchi orthogonal array, ANOVA. 1. Introduction Froth flotation is widely used for separating base metal sulphide minerals in complex ores. One of the major challenges faced by the flotation of these ores is the ever varying grade and mineralogy as the ore is exploited (Kabuda et. al., 2011).

Two different flotation separation strategies are used. Differential flotation sequence: A differential copper-cobalt flotation separation which begins with selective copper flotation by raising the slurry pH to 10 with lime and using a dithiophosphate copper collector.

01-08-2018· The rheology of slurries comprising equivalent concentrations of the copper ore and talc/muscovite (as used in the flotation and froth stability measurements) was measured using an AR1500EX (Thermal Analysis, Germany), with a standard 4-panel vane rotor geometry. This geometry is more suitable for analysis of mineral suspensions.

01-10-2015· Here, rougher flotation is most Selective at a pH of 9.5 as pH levels in the 9 to 10 range yielded 1% to 2% better recoveries. Mineralogy data also supports this and shows between 3% and 10% of the copper is present as low-grade middlings in pyrite, and further supports the benefit of floating middlings pyrite to maximize copper rougher recovery.

17-01-2016· In some ore-processing plants, the flotation of pyrite is carried out at neutral pH or slight acid conditions, such as Dongguashan copper ores-dressing plant in Anhui, China. Besides, CuSO 4 is often used as an activator for the activation of pyrite [ 10, 11 ].