Recovery mechanisms for pentlandite and MgO-bearing …

Recovery mechanisms for pentlandite and MgO-bearing gangue minerals 783 (c) Flotation of the 3.3 micron fraction of MgO Mineral Particles A more detailed analysis of the 3.3 ttm MgO mineral fraction under each set of reagent conditions was investigated to determine possible changes in MgO mineral recovery attributable to changes in chemical ...

Recovery mechanisms for pentlandite and MgO-bearing …

Recovery mechanisms for pentlandite and MgO-bearing gangue minerals in nickel ores from Western Australia. ... The addition of soda ash and CMC was shown to improve pentlandite flotation rate and recovery. Soda ash addition was found to be essential for improving flotation performance, as without it nickel recovery was unacceptably low.

Mechanisms for the improved flotation of ultrafine ...

Fig. 4 shows MgO recovery as a function of Ni recovery from the flotation of 10% pentlandite mixed with 90% lizardite in 100% de-ionized water, 1% bore water, 5% bore water and 100% bore water. It can be seen that compared with 100% de-ionized water, an addition of 1% bore water increased Ni recovery and decreased MgO recovery significantly.

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Removal behavior of slime from pentlandite surfaces and ...

To improve the flotation separation efficiency of pentlandite from serpentine gangue, sodium hexametaphosphate (SHMP), sodium silicate, carboxymethyl cellulose, and other agents can be used to disperse slime particles of MgO-type minerals on sulfide surfaces and improve sulfide flotation performance (Bremmell et al., 2005, Feng et al., 2012b ...

Effects of magnetite on magnetic coating behavior in ...

From Fig. 4, it is very obvious that the pentlandite had a higher recovery to the magnetic fraction than the serpentine mineral with or without the addition of magnetite.To maintain the same recovery, the required magnetic field intensity changed significantly with increasing amounts of magnetite. For example, to achieve a pentlandite recovery of 85% without any addition of magnetite, the ...

NICKEL AND COBALT ORES : FLOTATION | Semantic Scholar

Most of the world’s nickel is extracted from the mineral pentlandite, (Ni, Fe)9S8, which frequently occurs in ores containing predominantly pyrrhotite and various non-sulRdes, some of which contain magnesium (Table 1). The nickel content in such sulRde ores is generally low (0.2}3%) and varies from place to place in the same deposit. The low nickel content of the present-day nickel sulRde ...

(PDF) Process flowsheet development for beneficiation of ...

Process flowsheet development for beneficiation of nickel ore. ... mechanisms for pentlandite and MgO-bearing gangue ... and the dominant recovery mechanism of magnesia is shown to be recovery …

Removal behavior of slime from pentlandite surfaces and ...

The flotation results show that at pH value of 8, where the flotation of lizardite and pentlandite are routinely performed, S–g–PAM and S–g–PAA improve pentlandite recovery efficiently ...

Effect of MgO minerals on pentlandite flotation | Request …

Effect of MgO minerals on pentlandite flotation ... such as carboxylmethyl cellulose or phosphate-guar gum could improve Ni grade by increasing Ni recovery and decreasing MgO recovery. It was ...

Effects of lizardite on pentlandite flotation at different ...

The results show that the finer the lizardite slime is, the lower the pentlandite recovery will be at the routinely performed pH 8.5. The addition of aluminum ions prevents the detrimental effect ...

The effect of polyether on the separation of pentlandite ...

The effect of polyether on the separation of pentlandite from serpentine has been studied. In addition to flotation and sedimentation tests, electrophoresis and adsorption tests have been conducted.

Recovery of SO2 and MgO from By-Products of MgO Wet …

Nov 01, 2014· An industrial demonstration unit using natural gas as a heat source was built to calcine the by-products of MgO wet flue gas desulfurization from power plants; influencing factors on the SO 2 content in calciner gas were comprehensively analyzed; and an advantageous recycling condition of MgO and SO 2 from by-products was summarized. Results showed that the SO 2 content in the calciner gas …

Selectve agglomeration of magnetite in entlandite ...

or hetero-aggregation on pentlandite surfaces, and hence decrease the pentlandite flotation rate and ... mechanisms of magnesium silicates interference as follows: i) entrainment or . ... many experiments have been conducted to depress MgO minerals and improve the Ni recovery. A new process was implemented at Mt. Keith

The effect of polyether on the separation of pentlandite ...

The adsorption of polyether on serpentine surface may change the surface characteristic of serpentine. As a direct surface chemistry investigation of the different minerals, individual electro-kinetic studies were conducted for pentlandite and serpentine particles as a function of pH in 0.001 M KNO 3.It can be seen from Fig. 7 that serpentine has an IEP of around pH 11.8.

REDUCING THE MAGNESIUM OXIDE CONTENT IN

The stage recovery of MgO for a test carried out without a depressant showed that 57.7% of the MgO was recovered during the first five minutes of the test. Thus, there is need to effectively depress the fast floating MgO during the early stages of the flotation process. Nickel recovery and grade were increased by …

Chemical precipitation method for chromium removal …

(412 mL) and MgO (85 mL). The optimum pH of 9.8-10.3 with removal efficiency of 99.98% and the good sludge with high settling rate and lower volume was obtained using MgO precipitating agent. Hence the MgO was found to be a good precipitating agent for removal and recovery …

The Separation of Pentlandite from Chalcopyrite ...

Marrs, G, 2014. The separation of pentlandite from chalcopyrite, pyrrhotite and gangue in nickel projects throughout the world, in Proceedings 12th AusIMM Mill Operators’ Conference 2014, pp 153–162 (The Australasian Institute of Mining and Metallurgy: Melbourne).

Flotation Kinetics: Mass & Water Recovery VS Entrainment ...

This covers the recovery of entrained solids with water and the relationship between mineralogy and flotation performance; both are described in terms of flotation kinetics. The starting points for the relationship between mass and water recovery other products of a flotation rate test. In addition to concentrate mass, metal or mineral and floatable gangue. If the mass of water in each ...

v115n12a13 The effect of sodium carbonate on the ...

increased the nickel recovery from 82% to 90%, while the Ni grade did not change. To study the mechanism by which sodium carbonate increased the flotation recovery of pentlandite, the effect of sodium carbonate on the settling behaviour of the nickel ore was investigated. The results (Figure 3) …

Publications List Grano - University of Adelaide

Recovery mechanisms for pentlandite and MgO bearing gangue minerals in nickel ores from Western Australia, Accepted for publication. Minerals Engineering, Vol 10 (8) pp 775-786. 46. Small, G.L., Grano, S.R., Ralston, J. and Johnson, N.W., (1997). Methods to increase fine mineral recovery in the Mount Isa Mines Lead/Zinc Concentrator. Minerals ...

MgO Depression in Ci-Ni Flotation - Froth Flotation ...

To participate in the 911Metallurgist Forums, be sure to JOIN & LOGIN Use Add New Topic to ask a New Question/Discussion about Flotation. OR Select a Topic that Interests you. Use Add Reply = to Reply/Participate in a Topic/Discussion (most frequent). Using Add Reply allows you to Attach Images or PDF files and provide a more complete input. Use Add Comment = to comment on someone else’s ...

The Separation of Pentlandite from Chalcopyrite ...

Marrs, G, 2014. The separation of pentlandite from chalcopyrite, pyrrhotite and gangue in nickel projects throughout the world, in Proceedings 12th AusIMM Mill Operators’ Conference 2014, pp 153–162 (The Australasian Institute of Mining and Metallurgy: Melbourne).

Flotation Kinetics: Mass & Water Recovery VS Entrainment ...

This covers the recovery of entrained solids with water and the relationship between mineralogy and flotation performance; both are described in terms of flotation kinetics. The starting points for the relationship between mass and water recovery other products of a flotation rate test. In addition to concentrate mass, metal or mineral and floatable gangue. If the mass of water in each ...

v115n12a13 The effect of sodium carbonate on the ...

increased the nickel recovery from 82% to 90%, while the Ni grade did not change. To study the mechanism by which sodium carbonate increased the flotation recovery of pentlandite, the effect of sodium carbonate on the settling behaviour of the nickel ore was investigated. The results (Figure 3) …

Publications List Grano - University of Adelaide

Recovery mechanisms for pentlandite and MgO bearing gangue minerals in nickel ores from Western Australia, Accepted for publication. Minerals Engineering, Vol 10 (8) pp 775-786. 46. Small, G.L., Grano, S.R., Ralston, J. and Johnson, N.W., (1997). Methods to increase fine mineral recovery in the Mount Isa Mines Lead/Zinc Concentrator. Minerals ...

MgO Depression in Ci-Ni Flotation - Froth Flotation ...

To participate in the 911Metallurgist Forums, be sure to JOIN & LOGIN Use Add New Topic to ask a New Question/Discussion about Flotation. OR Select a Topic that Interests you. Use Add Reply = to Reply/Participate in a Topic/Discussion (most frequent). Using Add Reply allows you to Attach Images or PDF files and provide a more complete input. Use Add Comment = to comment on someone else’s ...

10.1016/j.mineng.2014.12.038 | DeepDyve

Jun 11, 2020· In addition, there was also an increase in the pentlandite recovery with increasing magnetite addition. Comparing no magnetite addition with magnetite addition of 3% at a magnetic field intensity of 200 kA m −1 , the recovery of pentlandite increased from 75.79% to 97.90%.

Application of three xanthates collectors on the recovery ...

The optimum nickel and pentlandite recovery was achieved at particle size of 64.73 µm milled for 1.5 h, pH of 9.65 and using a new flotation cell. Also, SEX collector recovered more nickel and pentlandite contents compared to PAX and SIBX collectors when optimum parameters of particle size, milling time, pH and flotation cell were considered.

Optimisation of Reagent Addition during Flotation of a ...

Optimisation of Reagent Addition during Flotation of a Nickel Sulphide ore at the Nkomati Mine Concentrator Prepared by: ... orebody in the Mpumulanga Province of South Africa consisting of pentlandite, chalcopyrite, pyrrhotite, pyrite and magnesium bearing silicates. ... MgO Recovery by Size after 30 Minutes of Flotation.....76 Figure 5-9 ...

THE EFFECTIVENESS OF MAGNESIUM OXIDE- BASED …

The Effectiveness of Magnesium Oxide-Based Additives in Mitigating Fouling Problems in Kraft Recovery Boilers Liming Zhao Master of Applied Science Department of Chemical Engineering and Applied Chemistry University of Toronto 2011 ABSTRACT Magnesium oxide-based additives have been used in kraft recovery boilers to minimize deposit

Mineralogy & Flotation: Floatability VS Selectivity Test ...

Mineralogy is the driving force behind flotation performance. A flotation batch and rate test measures this as mass pull recovery and concentrate grade. The real data from a rate test can be processed to determine the flotation kinetics of metal, mineral and gangue. What we cover here is what are kinetics and what do they mean. Special attention is paid to the definition of floatable gangue ...

CHAPTER 3 COMPARISON OF DIFFERENT PYRRHOTITE …

recovery is obtained and plotted in figures. 3.4 RESULTS AND DISCUSSION 3.4.1 The effect of xanthate on pentlandite – pyrrhotite separation Figure 3.1 shows the effect of collector ( potassium amyl xanthate, PAX ) on the selectivity of pentlandite and pyrrhotite separation, and the test procedures are shown in Table 3.1.

Nov 2005 - CSM, WMR, BHPB

Perseverance’s concentrate at Leinster for example is ~7:1, Mt Keith’s concentrate ranged from 2.5 to 3.5 but could improve by a factor of 1.7 in 2005 if a gravity circuit was installed to upgrade the concentrate for a 2% reduction in recovery, however, it was not yet (then) required because of the high Fe:MgO …

Reaction Mechanism and Kinetics of Methanol Produced to ...

The experimental results indicate that it does not affect too much to the skeleton structure of HZSM-5 molecular sieve with adding MgO. When reaction temperature, ratio of methanol and ethanol, and weight hourly space velocity are between 200 and 300 °C, 3:1, and 4 h …

Magnesium oxide | MgO - PubChem

Magnesium oxide (MgO). An inorganic compound that occurs in nature as the mineral periclase. In aqueous media combines quickly with water to form magnesium hydroxide. It is used as an antacid and mild laxative and has many nonmedicinal uses. MeSH. Contents. 1 Structures Expand this section.