In order to study the effect of starch concentration on the particle settling rate in the middle thickener, an industrialscale test was conducted. Five hundred kilograms of starch (concentration about 23 kg/t or 23,000 g/t) was added to the middle thickener feed (cleaner concentrate box 2) during a working shift, at the molybdenum processing plant.
Starches, particularly when anionically modified, were found to be effective depressants in anionic silica flotation. British gums and dextrins were beneficial for …
The quality of ore is more importance for iron and steel industry [1], thus mining of iron ore is of most importance for any country [2]. In past days, mining was focused on high grade iron ore ...
What is Coagulation and Flocculation? Flocculation and coagulation treatment chemicals are used in effluent wastewater water treatment processes for solids removal, water clarification, lime softening, sludge thickening, and solids dewatering.. Coagulants. Coagulants in water treatment are chemicals that are used to remove suspended solids …
Flocculants are used in the following industrial applications: sludge concentration, volume reduction, and ore dressing. Anionic flocculants Used in many industries that handle …
Starch molecules derived from natural sources like potato, corn, and tapioca have worked well for iron-bearing minerals compared to other synthetic flocculants. In the flocculation of hematite, either raw or degraded starch makes a polymeric interaction …
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Novel carbon nanofiller-based starch-g-polyacrylamide hybrid flocculation materials (St-PAM-CS) were in situ prepared using potato starch (St), acrylamide (AM), and hollow mesoporous carbon spheres (CSs; diameters of 300–400 nm). Structures of different St-PAM-CS systems were characterized by Fourier transform infrared (FTIR) …
Although water-soluble synthetic polymers find wide applications as flocculants, the potential problem associated with their use is lack of biodegradability and high cost. Polysaccharides owing to their distinctive features like ability to undergo different chemical reactions, biodegradability and sustainability inspire hope to obtain effective, …
Wheat starch was shown to be the most appropriate selective flocculant. Recommended articles. References (30) D.F. Bagster et al. ... This study highlights the utilization of different flocculants in the settling of Iron Ore Tailings slurry (IOTs) in a tailings pond. ... slurry concentration, and flocculant concentration. Rheological …
Most commercial flocculants are synthetic water soluble polymers with average molecular weights in the region 1000 to 30 × 10 6.They are generally supplied as powders that have a limited storage life, particularly when made up into solution. While there is an understandable reluctance for manufacturers to divulge their exact chemical nature, it …
The effect of anionic and non-ionic flocculants dosages on the electrokinetic zeta potential of iron ore tailings particles is shown in Fig. 4, Fig. 5 respectively at pH 6.5 and 10. The zeta potential measured in the absence of flocculant dosage at pH 6.5 and 10 are −12 and −26.5 mV respectively (Fig. 2).With the addition of …
The present investigation aims at detailed beneficiation of the low-grade goethitic ore of Gua iron ore mines from Jharkhand using selective flocculation process and modified starch as flocculant. The main purpose of this study is to determine the modified starch to be a novel flocculant for iron fines processing. Chemical composition of iron …
Introduction. Bauxite ores in China have characteristics of diasporic-type with high content of aluminum and silica, low content of iron and low Al 2 O 3 to SiO 2 mass ratio. In diasporic-bauxite ore processing, silicates are easily over-ground and the fine silicate slimes are harmful to direct and reverse flotation beneficiation of bauxite (Wei et …
Reagents used for this study were of LR grade and were chosen for their known selectivity in iron oxide ore flocculation. Starch is a hydrophilic polymer having chemical formula (C 6 H 10 O 5) n.PAM shows good solubility in water with chemical formula (C 3 H 5 NO) n.Starch of 0.1% concentration and polyacrylamide of 0.5% …
Microalgae can remove nutrients and organic contaminants from municipal wastewater reverse osmosis concentrate (ROC) and enable resource recovery via biomass production. Two cationic starch flocculants (starch-graft-poly cationic moiety 2-methacryloyloxyethyl trimethyl ammonium chloride (St-g-PDMC) and starch-graft-poly …
The results showed that CAFS was a cationic polymeric flocculant with high charge density, and its mesh starch chains grafted polyaluminum and polyferrous, and suggested CAFS as a novelFlocculation mechanism in water treatment, with good results for the studied conditions. A combined flocculant (CAFS) was prepared with …
The flocculation effects of polyamine-modified starch flocculants and commercial flocculants under different dosages and pH values were compared. The results showed that the starch-modified flocculant had the best effect and the cationic starch derivatives flocculation performance increased with increasing DS, and exhibited …
The flocculant mother liquor was dried in an oven at 75 °C until constant weight, and the solid content was measured to be 0.288 g/mL. 2.2. Characterization of starch-based flocculant and acquisition of conventional flocculants
BASF's solid liquid separation range includes flocculants, coagulants and dewatering aids that are employed across a diverse range of applications, including thickening, clarifying, …
In a study by Sami et al., starch was used to assist the function of chitosan in attracting the anionic commercial dye molecules. The application of chitosan–starch-based nanocomposites as flocculant was reported to remove 90% of congo red (CR) dye at an initial concentration of 0.015 mM, low pH value and 12 h of flocculation.
Fig. 16, Fig. 17 show the flocculation effect of the starch-acrylamide flocculant with the iron ore and quartz. Starch-acrylamide interacts with hematite to form hematite flocs to satisfy the flotation particle size requirement, which is 40 μm (Fig. 16). The 3D view of the hematite floc was created by ArcScene software based on the elevation ...
Semantic Scholar extracted view of "Effect of primary flocculant type on a two-step flocculation process on iron ore fine tailings under alkaline environment" by Ying Yang et al. ... A bench scale study was carried out to investigate the influence of polyacrylamides as co-depressant in a blend with starch depressant on the reverse …
In the present paper, an attempt has been made to beneficiate iron ore tailings by selective flocculation using guar gum and starch as flocculants along with sodium hexametaphosphate (SHMP) as the ...
Wang et al. used the starch, acrylamide (AM), 2-trimethyl ammonium ethyl methacrylate chloride (DMC) and potassium persulfate as raw material to prepare a starch substrate-based cationic copolymer flocculants. The starch-based cationic copolymer has shown better flocculation performance compared to commercially available coagulants …
Comparative Studies on Settling,Pulp Density, Settling Velocity, Flocculant Dose, and Filtration of Iron Ore Slime by Graft Copolymers and Commercial Flocculants - written by S. R Pandey published on 2013/08/07 download full …
Out of several reagents used in iron ore reverse flotation, depressants play a crucial role in selectively making the iron oxides hydrophilic and prohibiting them from …
concentration compared to the flocculant dose. It was also found that the iron value can be upgraded to 63-66.9 % from the feed iron value of 37.65-55.33 % with the recovery of 63-90 %.
