Welcome to ATE! Call us:

+86-21-58386189, 58386176

Molybdenite recovered by a flotation process

Recovery of Molybdenum & Rhenium From Molybdenite …

Major losses of molybdenum and rhenium occur during flotation in the cleaner flotation sequences; therefore, a process that would accept lower grade, partially cleaned molybdenite flotation concentrates that contained some copper could significantly improve overall molybdenum-rhenium recovery.

Polymeric Depressants in Purification by Flotation of ...

Polymeric Depressants in Purification by Flotation of Molybdenite P.F.A. BRAGAa, b, A.P. CHAVESb, A.B. LUZa, and S.C.A FRANÇAa a bCoordination of Mineral Processes, CETEM – Centre for Mineral Technology, Brazil. b Department of Mining Engineering, Polytechnic School of the University of São Paulo, Brazil. ABSTRACT In Brazil, there are no official reserves of molybdenum, and the …

FLOTATION PROCESS FOR RECOVERING MOLYBDENUM

Jan 15, 1974· A process for recovering molybdenite from a metallurgical concentrate comprising a major proportion of copper sulfide and other sulfides and a minor portion of molybdenum sulfide is provided, in which the copper and other sulfides are selectively depressed by employing a mixed thiol-alcohol thereby enabling the molybdenite to be recovered by flotation.

INVESTIGATION OF EFFECTIVE PARAMETERS FOR …

recovery of molybdenite and copper were investigated. Molybdenite recovery in the bulk flotation circuit was consistently lower than that of the copper sulphides as well as being far more variable. This paper describes the methodically use of size by size recovery data, …

Effects of pH and pulp potential on selective separation ...

S consumption from 16kg/t to 6kg/t at a constant metallurgical efficiency in rougher flotation. In such a condition, the recovery of 92.88% and the separation efficiency of 90.03% were achieved in flotation of molybdenite, comprising only 3% of copper minerals.

A novel approach for flotation recovery of molybdenite ...

In this paper, a novel approach for flotation recovery of molybdenite, galena and pyrite from a complex molybdenum-lead ore has been investigated.

Molybdenite Flotation - 911metallurgist.com

Table of ContentsMolybdenite Extraction Plant Molybdenite Plant Feed ThickenerCyanide Leach CircuitFuel Oil for Molybdenite FlotationDifferential Flotation Process for Recovery of Molybdenite from Copper Concentrates Factors Directly Affecting Molybdenite Flotation: The average molybdenite recovery in the copper concentrator for the first nine months of 1980 was 67.13%.

molybdenite recovered by a flotation process

Molybdenite Flotation 911metallurgist. Byproduct molybdenite technology includes two stages A CuMo sulfides bulk flotation; and A molybdenite selective flotation. It is well known that molybdenite is a mineral with natural floatability (intrinsic hydrophobicity), and under conventional flotation technology is recovered . Get Price

Molybdenite flotation from copper/molybdenum concentrates ...

Abstract. Typically, rougher molybdenite flotation and recovery from bulk copper/molybdenum concentrates involves the use of alkalisulfides, Nokes reagents, cyanides, oxidants, and/or thermal treatment to depress copper sulfide minerals.

FLOTATION RECOVERY OF MOLYBDENITE - FMC CORP,US

May 21, 1974· 1. In a process for the separation of molybdenite from copper concentrates obtained by froth flotation in the presence of an organic collector, the improvement whereby the molybdenite is recovered in a more concentrated form comprising:

Mechanism study on flotation separation of molybdenite ...

According to the flotation process, collectors absorbed on mineral surface in the first-stage flotation should be removed for the following separation of chalcocite and molybdenite. Fig. 4 illustrates flotation production of chalcocite and molybdenite after collected by BX as function of sodium sulfide dosage. Recoveries of the two minerals ...

Review of the flotation of molybdenite. Part I: Surface ...

Mar 10, 2016· Molybdenite (MoS 2) is a naturally hydrophobic mineral with anisotropic surface properties.Its floatability is influenced by a number of factors such as, particle size and shape, face/edge ratio, degree of crystallization, face heterogeneity, pH, etc. Molybdenite is floated by using oily collectors, and its recovery is strongly affected by slime coating phenomena.

Use of polyethylene oxide to improve flotation of fine ...

The effects of pH and PEO on the flotation of the −10 μm size fraction of molybdenite are summarized in Fig. 6.As this figure demonstrates, while in the absence of PEO the recovery of the −10 μm fraction of molybdenite is very low, the depressing effect of pH can be dramatically reduced when PEO is added.

US5068028A - Molybdenite flotation from copper sulfide ...

A process for recovering molybdenite from feed materials containing copper sulfide and molybdenite (e.g. copper/molybdenum concentrates from flotation processes) wherein the feed material is treated with ozone and then floated to recover molybdenite.

Introduction to Mineral Processing - Chevron Phillips Chemical

Introduction to Mineral Processing. ... flotation is a process in which valuable minerals are separated from worthless material or other valuable minerals by inducing them to gather in and on the surface of a froth layer. Sulfide and non-sulfide minerals as well as native metals are recovered by froth flotation. This process is based on the ...

Review of Molybdenum Recovery Processes | SpringerLink

Nov 27, 2014· Our purpose in this paper is to review present molybdenum recovery processes from a historical viewpoint and to point out areas where research should be concentrated. As in many mineral deposits, ore grades of molybdenite are trending toward lower values and substantially different grade-recovery economics are likely to occur.

Selective flotation separation of molybdenite and talc by ...

PDF | Humic acid (HA) has been studied as a potential selective depressant for molybdenite in the flotation separation of molybdenite and talc in this paper. In the single mineral flotation tests ...

Factors affecting the flotation recovery of molybdenite ...

Investigations have been conducted to characterize the surface chemical and flotation properties of molybdenite in aqueous environments typical of those that exist in the copper circuits of plants which process porphyry copper ores. ... Factors affecting the flotation recovery of molybdenite from porphyry copper ores. ... Raghavan, Srini; Hsu ...

Molybdenum Ore Processing by Flotation

Metallurgical ContentThe Molybdenum Process FlowsheetGrindingCoarse Flotation CircuitRegrind CircuitFine Flotation CircuitConcentrate TreatmentTailingsFlotation of Molybdenite from Copper This molybdenum flotation circuit, based on 250-500 tons per 24 hours is designed for low-grade molybdenum ore having high-grade streaks and with pyrite-quartz gangue.

A novel approach for preferential flotation recovery of ...

Request PDF on ResearchGate | A novel approach for preferential flotation recovery of molybdenite from a porphyry copper–molybdenum ore | In this paper, three flotation approaches, bulk ...

US2957576A - Recovery of molybdenite by flotation - Google ...

1. a process for recovering molydenite from a flotation concentrate containing copper sulfide and molybdinite which comprises subjecing an aqueous pulp of the concentrate to froth floation in the presence of a frothing agent, from 0.1 to 0.5 pound per ton of concentrate of an aqueous emulsion containing from 5 to 30 percent by weight of a dimethylpolysiloxane having a viscosity of at least 200 ...

A novel approach for preferential flotation recovery of ...

Then the rougher tailing of the molybdenum circuit will be treated by the copper circuit to obtain a high recovery of copper along with a high recovery of other co-present metal values. Through this flotation process, the influence of lime on molybdenite floatability is remarkably impaired and the high recovery of molybdenite will be obtained. 2.

US2664199A - Flotation recovery of molybdenite - Google ...

US2664199A US306638A US30663852A US2664199A US 2664199 A US2664199 A US 2664199A US 306638 A US306638 A US 306638A US 30663852 A US30663852 A US 30663852A US 2664199 A US2664199 A US 2664199A Authority US United States Prior art keywords concentrate molybdenite flotation copper iron Prior art date 1952-08-27 Legal status (The legal status is an assumption and is …

1 Froth Flotation – Fundamental Principles

flotation rate, particle size recovery, air flow, pulp density, etc.) As a result, it is difficult to study the effects of any single factor in isolation, and compensation effects within the system can keep process changes from producing the expected effects (Klimpel, 1995).

Recovering molybdenite from ultrafine waste tailings by ...

Request PDF on ResearchGate | Recovering molybdenite from ultrafine waste tailings by oil agglomerate flotation | Neutral oils like kerosene, diesel, transformer and rapeseed oil were used as ...

Recovering molybdenite from ultrafine waste tailings by ...

Highlights Conventional flotation is an ineffective process in recovery of ultrafine molybdenite. The mean particle size of concentrate using transformer oil as bridging is 2.05 μm. The bigger the d 50 a, the smaller the d 50 p, and the higher the molybdenum recovery. Oil agglomeration flotation has achieved good results under industrial scale.

Flotation of Chalcopyrite and Molybdenite in the Presence ...

The interaction of OM with sulphide minerals and its effects on their flotation are little understood. Although chalcopyrite recovery and grade are generally high in the flotation of most copper and molybdenum ores, this is not the case for molybdenite, whose flotation is much lower and sensitive to changes in hydrodynamic and pulp conditions in the flotation cell [9,10,11,12].

Interaction Mechanism between Molybdenite and Kaolinite in ...

This paper aims to understand the fundamental interaction mechanism between molybdenite and kaolinite in gypsum solution using kerosene as collector. Micro-flotation tests were conducted to study the effect of gypsum solution on the flotation performance of mixed −74 μm molybdenite and −10 μm kaolinite mineral. The results showed that the recovery of molybdenite decreased from 86% to 74% ...

OPTIMIZATION OF FLOTATION PARAMETERS FOR …

flotation rate constant responds to second-order kinetics model with correlation coefficient of 0.99. At the end of the multi stage flotation test performed under the optimum flotation parameters, Mo recovery and content for final concentrate were found as 72.3% and 52.15%, respectively.

US3834893A - Combined chemical treatment and flotation ...

an off grade or low grade molybdenite ore material containing insoluble non-sulfide gangue as well as other impurities is treated by a combination of chemical and flotation steps to produce a molybdenite concentrate of commercially acceptable grade. the ore material, usually a molybdenite flotation concentrate, is subjected to roasting in the presence of concentrated sulfuric acid and is ...