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(2) Concentrate grade. The general rule is that the concentrate grade is higher when ore flotation is carried out in a leaner slurry, while the concentrate grade is reduced when it is floated in a thicker slurry. (3) The dosage of the agent. The flotation agent should maintain a certain mass fraction in the pulp to have a good flotation effect.


US4311584A US06/206,246 US20624680A US4311584A US 4311584 A US4311584 A US 4311584A US 20624680 A US20624680 A US 20624680A US 4311584 A US4311584 A US 4311584A Authority US United States Prior art keywords chromite ore flotation sub pounds Prior art date Legal status (The legal status is an assumption and is not a legal conclusion.


per ton of rougher concentrate. Con­ ditioning and flotation times were 10 and 5 min, respectively. Results ob­ tained with a concentrate from flotation using AERO 317-Pennfloat 3 are shown in table 4. The amount of gangue miner­ als depressed was about …


The Bureau of Mines, U.S. Department of the Interior, devised a flotation technique for upgrading chromite in chromium ores and gravity concentrates. The technique consisted of cationic flotation of chromite from a slime-free pulp acidified to ph 2.5 Or lower using h2so4 modifier. Flotation results showed that ore containing serpentine as the primary gangue mineral was more amenable to concentra


In the flotation process of Yanbian copper-nickel ore, serpentine slimes coating significantly reduce the Cu-Ni/MgO separation efficiency resulting in high MgO grade in the concentrate. The application of sodium phytate significantly improved the flotation performance and for MgO control in flotation of Yanbian ore.


smelters. Since the quality of nickel flotation concentrate depends heavily on its MgO content (generally less than 6–7% for or 2 grade nickel concentrate according to the standard requirement from National Non-ferrous Industry), reducing the entrainment of serpentine during flotation is becoming more and more pressing. Previous research has


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Flotation of Chromite Ore

Petrographic examination of the pH 2.0 flotation products showed olivine to be present in the concentrate while serpentine remained in the tailings. To increase the selectivity of Mouat ore to amine flotation of chromite, a selective olivine depressant must be found.


The effects of pH value,particle size,pulp concentration,variety and dosage of frother on the floatability of fine serpentine in Jinchuan copper-nickel sulphide were investigated by flotation tests and measurement of contact angle,zeta-potential and foam water recovery rate,the flotation mechanism of the fine serpentine was analyzed.The results show that the serpentine is a kind of natural ...


Serpentine, a magnesium silicate mineral with positive surface charge in many sulfide ores around the world, usually deteriorates the flotation behavior by covering the target mineral surface. In this paper, the effect of surface potential regulation on serpentine flotation was revealed by flocculation experiments, zeta potential measurements, infrared spectrum analysis, and DLVO theoretical ...


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At the same time, the addition of carbonate and sulfate can promote the flotation recovery of chalcopyrite and serpentine.However, it mainly achieves the effect of relatively suppressing serpentine by accelerating the flotation rate of chalcopyrite and reducing the MgO content in …


The separation of pentlandite from chalcopyrite The effect of quartz on the flotation of pyrite depressed. The separation of pentlandite from chalcopyrite pyrrhotite and gangue in nickel projects throughout the world V Lawson G Hill L Kormos G MarrsThe effect of serpentine and quartz on the flotation of pyrite at pH 9 is shown in Fig 2 It can be seen from the picture that serpentine particles ...


At the peak value of pH 8 it seems possible to concentrate chromite from serpentine gangue. The effect of collector concentration on minerals flotation at pH 8, is performed in Fig. 5b.


The refractory lead oxide ore has become an important source of lead metal with the continuous depletion of lead sulfide minerals. Lead oxide ore is of poor floatability and there are few cases to concentrate it successfully. In this study, the sulfidization-xanthate flotation method is applied for the beneficiation of lead oxide ore in Yunnan Province (China) with sodium hexametaphosphate and ...


The flotation results showed that sodium alginate could simultaneously depress the flotation of chlorite and serpentine effectively, but seldom influenced the floatability of chalcopyrite at pH 9. In the ternary mixture flotation, a concentrate with a Cu grade of 31% could be achieved at Cu recovery of 90%.


The battery limits for the Selinsing Stage 1 sulphide flotation circuit are the primary mill feed conveyor, the concentrate storage facility and the tails thickener underflow pump discharge as ...


In some cases the concentrate from the first three or four rougher flotation cells can be sent directly to cleaning without regrinding. After the rougher flotation concentrate is reground it is cleaned twice in additional "Free-Flow" Flotation Machines with the recleaned concentrate going to final concentrate filtration or, as the ...


In the process of flotation, serpentine is easy to get into the concentrate together with useful minerals, which seriously affects the quality of concentrate products.


flotation, concentrate filtration, and; tailing disposal sections. In the crushing section of the plant the ore from the mine is broken down to about 3/8-in. size in two or three stages without the use of water except as a spray to remove dust, this being the economical limit of dry crushing machinery in modern practice. ...


In sulfide ore processing, serpentine may report to flotation concentrate through attachment to the valuable minerals as "slime coatings" [1–3] . As a kind of magnesium silicate gangue mineral, large quantities of serpentine in flotation concentrates can cause problems during smelting, often resulting in the imposition of smelter ...


If the main gangue in nickel-copper sulfide ores or precious metals sulfide ores is serpentine transformed from primary silicate minerals, it is difficult to get a high quality concentrate with lower MgO content that is suitable for smelting by physical mineral processing only such as floatation. This thesis put forward a new method to process this kind of ores.


In the ternary mixture flotation, a concentrate with a Cu grade of 31% could be achieved at Cu recovery of 90%. ... on flotation system of serpentine and pyrite and its mechanism were investigated ...


floatation process chromite prodorecozaChromite The only mineral ore of chromium metal Geology. flotation process chromite sghitech flotation process chromite hotrunnersolutionsin flotation of chromite and serpentine chromite is an important strategic mineral usually associated with Chromite is found in beach sands derived from the weathering of chromite bearing rocks and laterite …


Large amounts of serpentine in the flotation concentrate reduces the effectiveness of smelting, often resulting in the imposition of smelter penalties on mineral processing companies [2]. ...


Carbonation converts serpentine, the primary gangue or undesirable mineral, to magnesite. It prevents slime coating of fine gangue minerals on pentlandite, the main nickel-bearing mineral, during froth flotation, and improves nickel recovery and concentrate grade.


single copper concentrate has been modeled for this study. In 2011, approximately 13 million metric tons (Mt), or about 80 percent of the world's primary copper supply, originated from concentrate produced by flotation (International Copper Study Group, 2012). In 2011, about 60 percent of primary


In nickel-copper sulfide ore processing, serpentine is a common gangue mineral encountered in complex sulfide ores and can easily cause entrainment during flotation [].Large amounts of serpentine in the flotation concentrate reduces the effectiveness of smelting, often resulting in the imposition of smelter penalties on mineral processing companies [].


Dispersive effect of low molecular weight sodium polyacrylate on pyrite-serpentine flotation 1203 used as pH regulators. Deionized double distilled water was used for the micro-flotation tests, adsorption and zeta potential measurements. 10 20 30 40 50 60 70.0.0.0.0.0 k k k k ¹ ¹ º ¸ i j ¸ ¿ · ¿ · ¿ º j ¸ ¸ i º ¿ ¸ º j j ...


Different from galena, serpentine has strong depression effect on all the three sizes of pyrite. So the flotation separation of fine grained galena and pyrite can be achieved. A concentrate with Pb grade of 65.09% and recovery of 67.72% can be achieved in the mixed minerals flotation when serpentine was added as depressant.


Due to the limitation of freshwater sources and increasingly stringent disposal standards [13, 74, 79], the minerals industry has attempted to increase water use efficiency, reduce freshwater utilization, and minimize water discharge, or seek alternatives to fresh water [57, 59, 78, 84, 101].It is widely accepted that flotation is the most popular mineral processing method consuming the ...


The production of flotation concentrate is expected to commence in July 2022 as soon as all of the flotation cells, concentrate thickener and filter press have been commissioned.


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flotation of chromite ore pdf

Abstract. The Bureau of Mines investigated column vs conventional flotation of chromite and fluorite ores. Fine-bubble column flotation of deslimed chromite ore produced a 44.7 % Cr 2 O 3 rougher concentrate at 87.1 % recovery, whereas conventional flotation produced a 40.4 % Cr 2 O 3 concentrate at 85.4 % recovery.


In this study, pentlandite was selectively separated from serpentine using magnetic coating technology by adjusting and optimizing pH, stirring speeds, magnetic field intensities, and dosages of sodium hexametaphosphate (SHMP) and sodium oleate (SO). A magnetic concentrate with Ni grade of 20.8% and Ni recovery of 80.5% was attained under the optimized operating conditions. …


The flotation results showed that coarser serpentine possessed a weaker depression effect on the pyrite flotation process, and the use of KAl(SO 4) 2 ·12H 2 O could efficiently limit the detrimental effect of fine serpentine on pyrite with a maximum increase of …