Clean crystalline boric acid is isolated from a slurry, obtained by reaction between a borate ore and sulfuric acid, and seriously contaminated with clay slimes and sodium sulfate, by the steps of adding a crystal modifier to the slurry, stirring said slurry at a temperature from about 55* to about 100*C., cooling said slurry to a temperature near Glauber''s salt transition temperature, adding ...

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Sodium silicate(s), also known as "water glass", are one of the oldest and most widely used industrial chemicals. Its first use in North American mining operations can be traced back to around 1925, which coincided with early use of xanthates in mineral flotation.

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12%Therefore, ammonium sulfate and copper sulfate have the optimum combination: ammonium sulfate of 200 g·t −1 and copper sulfate of 300 g·t −1. Rougher-collector experiments. Xanthate and dithiophosphate are the most common collectors for sulfide ore flotation. Structures of flotation reagent dictate its performance.

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We proposed a novel surface treatment method using sodium hypochlorite for facilitating co-separation of ABS and PC from WEEE plastics by flotation for recycling. Optimization of surface treatment ...

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It was shown that from a flotation feed contained 360 ppm Fe2O3 and 1190 ppm Al2O3, sand concentrate contained 29 ppm Fe2O3 and 564 ppm Al2O3, was produced. The optimum flotation conditions were 3.86 kg/t sodium dodecyl sulphate dose, 3.22 flotation pulp pH, 1226 rpm impeller speed, and 22.24 L/min airflow rate.

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The fludity was used for characterizing the degree of acid hydrolysis. The substitution degree was measured by the spectrophotometric method. The optimized hydroxyropylation conditions were as follows: reaction temperature 40°C, reaction time 18h, amount of sodium hydroxide 1.2%, amount of anhydrous sodium sulfate 12%, respectively.

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The results of flotation tests showed that sodium silicate performed better as depressant of iron oxide, but had little effect on silica flotation in the apatite- iron oxide- silica flotation system.

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Authors present an optimization of anionic flotation using tall oil fatty acids mixed with anionic phospholane as an anionic collector. ... and amine was used in cationic reverse flotation. Sodium ...

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The following optimal costs of reagents, g/t: 140-200 potassium xanthate, 70-100 ing agent, 100 copper sulfate; the concentrate yield is 41-43 %; it is extracted to, %: 95 Fe, 49 Cu, 96 Zn, 98 S0, 18-19 Pb. At flotation 18,7% of lead goes into flotation concentrate and 80.5% is lead sulfate.

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1.. IntroductionPyrite is one of the major diluents of copper, lead and zinc concentrates. One explanation for the high flotation of pyrite in alkaline pH conditions is its inadvertent activation by copper either dissolved from copper minerals present in the ore or added in the zinc circuit to activate the flotation of sphalerite Bushell and Krauss, 1962, Voigt et al., 1994.

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Flocculation-DAF of sulfate-bearing flocs generated from the sodium sulfate solution The effect of the polymer flocculant concentration on the flotation of sulfate-loaded flocs is shown in Fig. 4 . It was observed that non-flocculated precipitates do not float properly, leading to a fairly low sulfate removal (1800 to 1100 mg·L − 1 ).

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Talbot (37) has investigated the flotation of Cu(II) with sodium lauryl sulfate, and Miller and Sullivan (38) have studied the fractiona- tion of Hg(II) nitro complexes. Schonfeld and his coworkers have observed that surfactants which can act as chelates as …

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Table XIV: Stat-Ease Statistical Model Flotation Equation Spreadsheet Optimization Model Predicted Co Recovery = 94.68 % Co Value $ 108.70 Predicted Cu Recovery = 90.97 % Cu Value $ 4.81 Predicted Au Recovery = 68.86 % Au value $ 3.79 Spreadsheet Optimized Conditions Total Value $ 117.30 Grind Time 75 min Rougher Collector PAX Rougher Dosage 1 ...

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As an example of the beneficial effect of copper sulfate in the activation of zinc sphalerite toward flotation, the series of results shown in Fig. 1 is of interest.These represent rougher tests on a sample of heavy pyritic ore. The particular sample in question contained about 5.6% zinc as marmatite; and was treated in a circuit made alkaline with lime, using pine oil as a frother and ...

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pare different flotation techniques and flota-Flotation Solutions for Helminth Ovaa Magnesium Sulfate (MgSO 4; SG 1.20) 450 g MgSO 4 1,000 ml tap water Zinc Sulfate (ZnSO 4; SG 1.18–1.20) 331 g ZnSO 4 1,000 ml warm tap water Sodium Nitrate Solution (NaNO 3; SG 1.18–1.20) 338 g NaNO 3 1,000 ml tap water Saturated Salt (NaCl; SG 1.18–1.20 ...

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Effects of sodium sulfate on the freshwater microalga Chlamydomonas moewusii: implications for the optimization of algal culture media J Phycol. 2016 Feb;52(1):75-88. doi: 10.1111/jpy.12367. Epub 2016 Jan 11. Authors Roi Mera 1 ...

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Potash Flotation Process. Potash occurs in soft deposits generally associated with sodium chloride and varying amounts of clay slime, which because of its colloidal character, complicates the beneficiation process. Potash ores generally contain 20 to 40 percent KCL with the balance being NaCl and a small amount of clay slime, the latter usually ...

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This sodium sulfate solution is easily processed in the new water recovery plant, where the majority of the water recycles back into the plant as pure condensate. ... Reagent Optimization for Improved Selectivity of Floating Co ... Flotation of a Porphyry Copper Ore with Cellulose-Surfactan

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The most routinely used depressants for suppression of gangue minerals in rutile flotation are inorganic reagents such as sodium fluorosilicate, sodium hexametaphosphate, depressant aluminum sulfate, sodium silicate and acidified sodium silicate among others [,,, ].

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Valorization of sodium sulfate waste to potassium sulfate fertilizer: experimental studies, process modeling, and optimization May 2020 International Journal of Green Energy 17(6):1-8

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Examples of modifiers are dextrin, dyes, lignin, polyphosphate, sodium cyanide, sodium silicate, sodium sulfide, starch, tannin, and zinc sulfate. The third period, 1951 to present, is characterized by the development of reagents specifically for flotation applications using a targeted design approach.

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However, the flotation of gibbsite by using amines as collectors can not be applied for the south western Sinai gibbsite ore because a significant amount of quartz is present. Bulut and Yurtsever [8] found that, sodium dodecyl sulfate, as an alkyl sulfate collector, is effective in the acidic pH range during the flotation of alumina

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The aim of this study was to design a local, floating, mucoadhesive drug delivery system containing metronidazole for Helicobacter pylori eradication. Face-centered central composite design (with three factors, in three levels) was used for evaluation and optimization of in vitro floating and dissolution studies. Sodium alginate (X 1), low substituted hydroxypropyl cellulose (L-HPC B1, X 2 ...

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Although flotation is known as the main method for enrichment of this ore, operation costs and complexity of this method should be considered for better selection and optimization of chemical reagent types and dosage to get higher recovery and higher grade concentrates (Li and Zhang, 2012).

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12%In this research, flotation of copper, lead and zinc minerals from a copper oxide–sulfide ore was studied. The identification tests showed that the sample is a mixture of quartz, chalcopyrite, galena, cerussite, hemimorphite and iron oxide minerals with 5.04% CuO, 1.61% PbO, 2.07% ZnO and 56.40% SiO2. The experimental design methodology (RSM) was conducted to …

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Later the effects of sodium sulfate and boric acid additions were examined. The initial conditions for nickel electrowinning were (1) a cell-feed electrolyte of 90 g/l Ni with nickel present as NiSO4, pH 3.5, (2) a temperature of 50° C, (3) a current density of about 2.15 amp/dm² (20 amp/ft²), and (4) a metal extraction, or nickel drop per ...

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The effect of particle size and reagent dosages are usually the most commonly studied parameters for flotation, whereas optimization through the study of the response of the petrographic components and the rank based on the vitrinites' reflectance of coal particles (V-types) are rarely investigated. ... (sodium sulfate) ore (Somin Compañía ...

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The earlier techniques for oocysts purification included saturated salt flotation, Sheather's sugar flotation, saturated magnesium sulfate flotation and chromium sulfate separation method (Jenkins et al., 2017; Ryley and Ryley, 1978; Smith and Ruff, 1975). The differential density flotation method is classical for oocyst purification, but it ...

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Sodium hydrosulfide (NaSH) is a chemical reagent with numerous applications within predominately three (3) industries: Kraft Paper Milling. In Kraft, pulping sulfidity is controlled through the use of reduction furnaces which reduce sodium sulfate plus caustic soda to sodium sulfide.

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Optimization of a Copper/Molybdenum Flotation Circuit by Depressing Pyrite from ... 3302 promoter as chalcopyrite collectors, fuel oil as molybdenite collector, and sodium sulfite, inc sulfate, calcium hydroxide and potassium dichromate as pyrite depressants

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