The flotation results obtained in high salinity water at pH 8.0 after grinding with forged steel and Hi-Cr steel media as reported in the previous work (Mu and Peng, 2021) are also shown in Fig. 1.When forged steel was used as grinding media, 78.0% chalcopyrite recovery and 39.9% pyrite recovery with a low Cu grade of 4.3% were …

mill (Armenia) have demonstrated good results in increa-sing extraction of copper and molybdenum both in a bulk cycle and on their selective segregating [16]. When studying the flotation process of Erdenetiyn-Ovoo porphyry copper ores, an inclusion of 12 g/t of DC-80 acetylene alcohol into the basic reagent mode has allowed

DOI: 10.1016/S1003-6326(21)65539-5 Corpus ID: 233781556; Interaction effects of flotation reagents for SAG mill reject of copper sulphide ore using response surface methodology

In the Sungun Concentrator Plant, the crushed ore is fed into a semi-autogeneses (SAG) mill to produce a product with K80 = 3 mm (Fig.1). The SAG mill products are then transferred to the two ball mills, where the ore is ground to a level of K80 = 80 ȝm. Lime, collectors of Z11 and AP407 are added to the ball mill feed as well.

The determined physicochemical models in the form of quantitative equations have been derived for the optimal conditions of flotation and depression of …

The Lead Zinc Copper Flotation and Separation Circuit ... The flowsheet is designed for a compact mill of a size that provides economical treatment at this tonnage. ... The zinc is floated with additional quantities of a collector and frother after conditioning with lime and copper sulfate. The pH of the lead circuit is approximately 8.0 and ...

Abstract Flotation reagents have a complex behaviour in the beneficiation of base minerals in clayey ores. Interaction effects of reagents on the efficiency of copper …

The flotation results gradually deteriorated as the mill-water accumulated acid; the more acid it got, the poorer the results. Lime was then added in the tube-mill and the pulp made alkaline; this produced a tremendous increase in the volume of froth made, but without any definite improvement in the tailing.

introduced to the mill. Lime solution was added constantly to maintain pH of 11. 2.3.1. Classification Classification of the mill discharge was realized via laboratory scale hydrocyclone having a cut-off size of 20 µm. Following hydrocycloning, the underflow was immediately introduced to flotation, while the overflow was left to settle ...

GOLD RECOVERY BY FLOTATION. A test on a sample, crushed to pass a screen of 120 holes per linear inch, containing $37 gold and 4.8% copper, gave a recovery by flotation alone of 90% of the gold and 98.5% of the copper, but left $8 gold in the tailing. The concentrate carried 44% insoluble matter, which could be reduced by re …

Flotation reagents have a complex behaviour in the beneficiation of base minerals in clayey ores. Interaction effects of reagents on the efficiency of copper flotation for a highly clayey low ...

mill with a grinding concentration of 65%. Through a roughing, 1000g/t sodium sulfide, 500g/t lime, 150g/t butyl xanthate and 30g/t terpenic oil were used to conduct ... The effect of different dosage of lime on copper flotation was researched. In roughing process for 4 minutes, the grinding fineness of70% -0.074mm, 1000g/t

The Pyrite Depression in a Copper Only Flotation circuit is simple enough. If your froth flotation system only tries to recover chalcopyrite-copper, you need to bring the plant's pH up to the other side (right side) of the PYRITE curve.

Most copper-molybdenum ores adopt the mixed flotation-copper-molybdenum separation process, because molybdenite and chalcopyrite have similar floatability and serious concomitant, and this …

In practical ore production, lime is usually added in the flotation stage, that is, the stirring tank or the flotation cell. However, adding lime to the mill could variety the complex and violent electrochemical reactions during grinding process, and it was another crucial factor affecting copper mineral flotation [28], [29], [30]. During ...

Trans. Nonferrous Met. Soc. China 31(2021) 792âˆ'806 Interaction effects of flotation reagents for SAG mill reject of copper sulphide ore using response surface methodology Ali AHMADI, Mojtaba REZAEI, Seyed Mohammad SADEGHIEH Department of Mining Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran …

It is well known that different milling procedures may result in different flotation responses. In the present study, the effect of various grinding conditions such …

The traditional high alkaline process (HAP) always encounters challenges in handling pyrrhotite-rich type copper sulfide ore, especially the slow copper flotation rate and the unsatisfactory separation efficiency. In this study, HAP was optimized via pulp aeration and lime-aid grinding, and their beneficial effect was studied systematically.

1. Introduction. Wet milling in ball mills followed by flotation is the general practice employed in the beneficiation of copper sulphide ores in which the major minerals of commercial significance typically are chalcopyrite (CuFeS 2), bornite (Cu 5 FeS 4), covellite (CuS) and chalcocite (Cu 2 S). The flotation response of ground minerals can …

Highlights • Lime plays a critical role in flotation by controlling pulp chemistry and collector adsorption. • Lime is the most economical and commonly used reagent for …

Saturated lime solutions demonstrate a pH level of 12.4 to 12.5. Since nickel sulfide depression is highest at this pH level, most testing was carried out in saturated lime water. At pH 12.4, KEX did not float the copper sulfides. When flotation was carried out at lower pH's (8 to 10), the separation of copper from nickel was not sharp.

A lime slaking and addition system can consists of two systems to control the pH in the rougher and cleaner flotation circuits.A pebble lime silo will dose dry lime to the SAG mill feed belt; a hydrated …

Bagdadts sulphide-copper flotation mill has recently been revitalized in much the same way as the mine. The main feature of the mill improvement was a sys­ tem of alkalinity (pH) control which boosted recovery of sulphide-copper by 10 percent. This close pH control also involved additional controls of density and initial ore feed.

Copper sulfide ores must be concentrated before they can be economically transported to a smelter. Froth flotation is part of a copper beneficiation process in which finely ground …

Sodium hydroxide, sodium carbonate, sodium sulphate, sodium silicate and lime are not uncommonly employed. It is the writer's experience that so far as flotation itself is concerned, when a minor …

In the flotation plant, a proprietary blend collector Kimfloat900 (150 g/t), a thionocarbamate formulation, was used in the copper flotation circuit at pH 11.5–12. The pH was kept constant at the target values by adding lime into the ball mill and flotation. A TPS meter was used to measure pH and Eh values during the flotation process.

Fig. 2 shows the P 80 of different mineral species in an ore for a major copper operation. These values vary significantly, with the P 80 of total solids, sulfide minerals, iron minerals, copper minerals and molybdenum are ∼ 200, 105, 125, 94 and 85, respectively. Flotation optimization of complex ores often requires a better …

The commonest depressing reagents are lime, sodium cyanide, and zinc sulphate. Lime is extensively used to prevent pyrite from entering the concentrate of other minerals particularly copper and zinc sulphides. Its action is positive and progressive ; it is only necessary to add it to the pulp in sufficient quantity to make the pyrite unfloatable.

In the table on the opposite page the column refers to undiluted flotation reagents such as lime, soda ash and liquids with a specific gravity of 1.00. …

H/ORP MEASUREMENTCopper processing examplehigh pH is important in copper ore processing to max. mize this mineral's flotation properties. Most copper ore slurries tend to be acidic. Plants typically add lime to the slurry in the mill or fl. atation circuit, increasing …