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Polyacrylamides (PAM) are used as flocculants in the copper-molybdenum mining industry to improve the settling rate of flotation tailings.
Polyacrylamides (PAM) are used as flocculants in the copper-molybdenum mining industry to improve the settling rate of flotation tailings.
Pyrite and galena flotation with KEX had recoveries greater than 90% for each mineral (pH = 8). After adding chitosan (0.67 mg/L), the pyrite recovery decreased to 23% (pH 4−9). In a flotation with mixtures of pyrite and galena, the recovery of galena was much higher than separately, concluding that chitosan is preferentially adsorbed on pyrite.
For the sedimentation of copper flotation tailings, the cylinder test results showed that two different techniques may be used to achieve the required performance, i.e., a high …
In the flotation of complex sulfide ores, a high pH value is generally used to separate valuable sulfide minerals from pyrite or pyrrhotite with xanthate collectors (e.g., Shen et al., 1998, Ball and Rickard, 1976). Fig. 1 shows that pH values larger than 11 are necessary to markedly depress pyrite flotation in the presence of xanthate collectors. The flotation of …
The same characteristic peaks appearing at 3334 and 3191 cm −1 of AOH and HKUST-Hs are respectively assigned to the free and associated amino groups from polyacrylamide (Fig. 3 b). Compared with CMCs-GSH, both absorption peaks of -CH 2 (2932 and 2869 cm −1 ) and carbonyl (1654 cm −1 ) become stronger for AOH and HKUST-Hs, …
Flotation is a process to enrich valuable materials from their natural reserves based on a difference in surface hydrophobicity in water [1]. ... Anionic polyacrylamide Magnafloc 1011 (MF1011) with a molecular weight of 1.75 × 10 7 g/mol was supplied by BASF Australia Limited. The selection of MF1011 as a PAM flocculant was based on its wide ...
To achieve efficient separation of chalcopyrite and molybdenite, cationic polyacrylamide (CPAM), nonionic polyacrylamide (NPAM) and anionic polyacrylamide (APAM) with molecular weight of 12 million were added as depressants of chalcopyrite, and compared their depressing performance with the traditional copper-molybdenum separation …
Generally, froth flotation is the most widely used approach to separate valuable minerals from gangue minerals due to their different floatability [8], [9], [10], [11].It has been found that the chalcopyrite and molybdenite have quite similar natural floatability and are very difficult to separate [12], [13] from each other. In order to enlarge their floatability difference, some …
Therefore, this study aimed to use the polycarboxylate ether/ester (PCE) superplasticizer first time as a mineral surfactant to improve both the settling and the …
Employing a combination of two types of polyelectrolyte might become necessary to enhance both the settling rate of the flocs and the water clarity of a fine-particle suspension in a high-capacity thickening process. The sequence of addition, mixing, type and dosage of polymer all affect the overall performance and capacity of a thickening process. For the sedimentation …
Polyacrylamides (PAM) are used as flocculants in the copper-molybdenum mining industry to improve the settling rate of flotation tailings. These types of reagents are recirculated to flotation in the water that is …
Depressant function of high molecular weight polyacrylamide in the xanthate flotation of chalcopyrite and galena Huang, P.; Wang, L.; Liu, Q. International Journal of Mineral Processing 128: 6-15 2014. ISSN/ISBN: 0301-7516. Accession: 082931245. Article emailed within 1 workday.
High-molecular-weight polymers based on anionic polyacrylamides (PAMs) are used as tailing flocculants in mineral processing plants. The recirculation of water recovered from the tailing thickeners...
A high molecular weight polyacrylamide (PAM) was tested as a potential selective depressant in the differential flotation separation of galena and chalcopyrite using potassium ethyl xanthate (KEX ...
The selectivity of thiocarbamates for iron sulfide minerals is higher than that of xanthate and nigra. In the flotation of polymetallic sulfide ores, methylthiocarbamate has a very effective collection performance for copper and zinc minerals. In the flotation of a copper sulfide ore, ethyl xanthate and amyl xanthate are used in combination.
COPPER INDUSTRY The pulp or tailings from the flotation cell need enter into thickening tank for further settlement. Flocculant can be fed for the promoting of subsidence and obtaining of overflow.
Pyrite flotation was induced by xanthate (1.1 × 10 −4 mol/L) and activated by copper cations (2.6 × 10 −4 mol/L). In the presence of sulfite (1.9 × 10 −3 mol/L), the recovery …
Depressant function of high molecular weight polyacrylamide in the xanthate flotation of chalcopyrite and galena. Int. J. Miner. Process. (2014) P. Huang et al. ... Flotation experiments showed that a recovery difference of 88.45 % was achieved in a binary mixed-mineral system with a DLD dosage of 40.00 mg/L at pH 8.00, indicating that DLD ...
In this paper, results of the depressing effect of a medium-DA PAM on the flotation of relevant copper sulfides such as bornite, enargite, and chalcopyrite are presented. Copper sulfide flotation is assessed using microflotation, as a function of pH, and PAM …
In this work, cationic polyacrylamide (CPAM) which was degraded by mechanical shear was used as a chalcopyrite potential selective depressant to separate molybdenite from chalcopyrite by flotation while using kerosene as a collector. Micro-flotation experiments of single minerals show that CPAM was the most suitable to be used as the chalcopyrite …
ular weight polyacrylamide were used. Table 1 con-tains a list of each polymer's characteristics. Prior to the occulation experiments, the stock solution of the polymer with a concentration of 0.5% w/v was pre-pared. 0.5 g polymer was added to the distilled water and mixed for 1 h in a magnetic stirrer at room tem-perature.
The effect of a carboxylated polyacrylamide (PAM) of 11.9% of degree of anionicity on molybdenite flotation was previously reported. In this work the depressing effect of a polyacrylamide of 8.15% ...
Molybdenite Flotation in the Presence of a Polyacrylamide of Low Anionicity Subjected to Different Conditions of Mechanical Shearing Darwin Estrada 1, Luver Echeverry 1, Andres Ramirez 1 and Leopoldo Gutierrez 1,2,* 1 Department of Metallurgical Engineering, Universidad de Concepcion, 4070371Concepción, Chile;
This study aimed to recover cobalt using tailings of the Küre flotation plant, which were determined to contain 0.17% Co. Flotation tests were conducted on samples taken from the tailings to ...
In a copper‑molybdenum processing plant, copper sulfide concentrate (such as chalcopyrite) is floated together with molybdenite in the first stage. [7] The separation of molybdenite and copper sulfide is achieved in the second stage through flotation. [8] In most scenarios, copper sulfides, such as chalcopyrite, are depressed using a depressant (e.g. …
Anionic polyacrylamide (APAM) has widely been employed in backfill mining to accelerate the sedimentation of fine tailings particles and increase the concentration of tailings slurry. ... (Method B) and pelletized sintering heap construction method (Method C) of copper flotation tailings on column bioleaching behaviors. In the three heap ...
For example, the Cu/Mo flotation operates at pH > 10.5 to depress pyrite and improve the quality of the concentrate [2], ... Influence of hydrolyzed polyacrylamide (hpam) molecular weight on the cross-linking reaction of the HPAM/Cr3+ System and transportation of the HPAM/Cr3+ system in microfractures. Energy Fuels ...
Copper Sulfate Image Changing Color Thermo Pigment Powders Polyacrylamide Powder, Find Details and Price about Copper Sulfate Pentahydrate Copper Sulfate from Copper Sulfate Image Changing Color …
Anionic polyacrylamide used for Copper processing: 1.Brand name:Chinafloc 2.Model:Chinafloc A2015 3.Delivery time:10days after confirming the order 4.Payment term:L/C or TT 5.Capacity for 20FCL 18MTS with pallets 20MTS without pallets ... The slurry or tailings from the flotation cells reports to a thickener where flocculant is added to promote ...
A high molecular weight polyacrylamide (PAM) was tested as a potential selective depressant in the differential flotation separation of galena and chalcopyrite using potassium …
In the flotation of Cu-Pb polymetallic sulfide ore, Cu-Pb bulk flotation followed by Cu-Pb separation is a common method for recovering Cu and Pb [3], [4]. However, the flotation separation of chalcopyrite from galena is challenging due to the homogenization and similar floatability [2], [5], [6]. Therefore, Cu-Pb bulk concentrate should be ...
Sodium Hexametaphosphate SHMP Dispersant Flotation Agent for Copper Smelting US$600.00-1,300.00 / Ton: 1 Ton (MOQ)
Solid-liquid separation accelerated by reagents such as flocculants have been extensively studied, which include polyacrylamide (PAM), polyethylene oxide (PEO), chitosan-based polymers, etc [7].To match the different mineral compositions of tailings, the flocculants can be synthesized for different kinds of electric charge types and molecular weight (MW).
PAMDTC exhibited superior depression efficacy on molybdenite to unmodified polyacrylamide (PAM) based on micro-flotation tests results when using diethyldithiocarbamate (DEDTC) as the collector. In addition, it was found that the degree of substitution (DS) of allyldithiocarbamate group in PAMDTC would greatly influence its depression power and ...
Low molecular weight polyacrylamide (PAM) polymers were used to separate copper-activated sphalerite from pyrite in the presence of isobutyl xanthate (IBX). The effects of carboxyl, sulfonate, hydroxyl or thiourea functional groups attached to the polymers on the flotation recoveries of sphalerite and pyrite were studied as a function of polymer …
A durable and recyclable Cu@MoS 2 /polyacrylamide/copper alginate nanocomposite double network (Cu@MoS 2 /PAAm/CA NCDN) hydrogel photo-Fenton-like catalyst was prepared for efficient removal of high concentration tetracycline (TC) in pharmaceutical wastewater. This hydrogel catalyst exhibits a remarkable synergistic effect …
Cationic polyacrylamide(CPAM) for air flotation and sludge dewatering 1.high viscosity 2.dissolve easily 3.Resistance to shear 4.Certification: ISO9001:2008. 5 ...
In this work, sodium alginate/sodium humate @ Polyacrylamide (SA/SH@PAM) hydrogel beads were prepared using sodium alginate as encapsulant, sodium humate as filler, and polyacrylamide wrapped on the outer layer. Removal and recycling performance toward batch and column adsorption of Cu (II) was investigated. The results indicated that …
In this work, cationic polyacrylamide (CPAM) which was degraded by mechanical shear was used as a chalcopyrite potential selective depressant to separate molybdenite from chalcopyrite by flotation ...