Narzędzia help

Preferencje help
Widoczny [Schowaj] Abstrakt
Liczba wyników
first last
cannonical link button

http://yadda.icm.edu.pl:80/baztech/element/bwmeta1.element.baztech-36c0a878-1f99-4541-af94-df168f0b0eaf

Czasopismo

Physicochemical Problems of Mineral Processing

Tytuł artykułu

Flocculation/dispersion of hematite with caustic digested starch

Autorzy Tang, M.  Wen, S. 
Treść / Zawartość
Warianty tytułu
Języki publikacji EN
Abstrakty
EN Selective flocculation of hematite with starch is a process well-known in practice. However, the separation of hematite from other minerals depends strongly on the methods of starch digestion performed either as heating-digestion or alkali-digestion (different type and dosage of alkali). The purpose of this study is to identify possible influence of the alkali-digested starch on flocculation of ultra-fine hematite when the starch was digested at different concentrations of sodium hydroxide at room temperature. Adsorption of starch digested with sodium hydroxide at different concentration on hematite was investigated by abstraction and co-precipitation tests. Turbidities tests, settling rates, flocculation/dispersion measurement and Fourier transform infrared spectroscopic analysis (FTIR) have also been conducted. Based on the results of the above mentioned tests it is suggested that the flocculating power of caustic digested starch towards fine particles may be significantly weakened, while its dispersing ability starts to play a role instead, if the concentration of sodium hydroxide is high enough in starch digestion. When the weight ratio of NaOH /starch is lower than 2, incomplete gelatinization of starch granules may lead to coagulation of fine particles of hematite mostly due to non-selective electrostatic attraction. The weight ratio of NaOH /starch from 2 to 4 helps to flocculate mineral surfaces selectively and efficiently, assuring a complete digestion of starch granules and a small amount of acidic functional products on the starch chain. However, much smaller and homogenous short-chain granules resulting from higher concentration of sodium hydroxide (the weight ratio of NaOH /starch is more than 4) used to digest starch may weaken the flocculating capacity of the caustized starch for hematite and lead to its dispersion.
Słowa kluczowe
EN starch   alkali-digestion   flocculation   dispersion  
Wydawca Oficyna Wydawnicza Politechniki Wrocławskiej
Czasopismo Physicochemical Problems of Mineral Processing
Rocznik 2015
Tom Vol. 51, iss. 2
Strony 477--489
Opis fizyczny Bibliogr. 34 poz., rys., tab.
Twórcy
autor Tang, M.
  • State Key Lab of Complex Nonferrous Metal Resources Clean Utilization, 650093, China and Department of Mineral Processing, Kunming University of Science and Technology, Yunnan, China, 650093, mtang-kmust@foxmail.com
autor Wen, S.
  • State Key Lab of Complex Nonferrous Metal Resources Clean Utilization, 650093, China and Department of Mineral Processing, Kunming University of Science and Technology, Yunnan, China, 650093
Bibliografia
AFENYA P.M., 1982, Adsorption of xanthate and starch on synthetic graphite, Int. J. Miner. Process 1, 303-319.
CAO Q., TIAN P., WU Q.L., 2009, Modeling diameter distributions of poly (N-isopropyacrylamide-co-methacrylic acid) nanoparticles, J. Appl. Polym. Sci. 111, 2584-2589.
CASU B., REGGIANI M., 1964, Infrared spectra of amylose and its oligomers, J. Polym Sci. C: 7, 171-185.
DRZYMALA J., FUERSTENAU D.W., 1981, Selective flocculation of hematite in the hematite-quartz-ferric Ions-polyacrylic acid system: Part I. Activation and deactivation of quartz, Int. J. Miner. Process 8, 265-277.
DUBOIS M., GILLES K.A., HAMILTON J.K., REBERS P.A., SMITH F., 1956, Colorimetric method for determination of sugars and related substances, Anal. Chem. 28, 350-356.
CHATTOPADHYAY S.S., SINGHAL R.S., KULKARNI P.R., Optimization of conditions of synthesis of an oxidized starch from corn and amaranth in film-forming applications, Carbohydr. Polym. 34, 203-212.
GERSMANN H.R., NIEUWENHUIS H.J.W., BICKEL A.F., 1963, The mechanism of autoxidations in alkaline media, Carbohydr. Res. 74, 1383-11385.
HOUOT R., 1983, Beneficiation of iron ore by flotation _Review of industrial and potential applications, Int. J. Miner. Process 10, 183-204.
IWASAKI I., LAI R.W., 1965, Starches and starch products as depressants in soap flotation of activated silica from iron ores, Soci. Min. Eng. Transac DEC: 364-371.
JEBBER K.A., ZHANG K., CASSADY C. J., CHUNG-PHILIPS A., 1996, Ab Initio and Experimental Studies on the Protonation of Glucose in the Gas Phase, J. Am. Chem. Soc. 118, 10515 - 10563.
KHOSLA N.К., BHAGAT R.P., GANDHI К.S., BISWAS A.К., 1984, Calorimetric and other interaction studies on mineral-starch adsorption systems, Colloids Surf. 8, 321-336.
LIU Q., CHARLET G., YELLE S., ARUL J., 2002, Phase transition in potato starch-water system I. Starch gelatinization at high moisture level, Food Res. Int. 35, 397-407.
LIU W., WEI D., GAO S., HAN C., 2011, Adsorption mechanism of N-laurel-1,3-diamino propane in a hematite-quartz flotation system, Min. Sci. Tech. (China), 21, 213-215.
MAHER G.G., PEORIA, 1983, Alakli gelatinization of flours, Starch/Stäkrke 35, 271-276.
MATTISSON M.F., LEGENDRE K.A., 1944, Determination of carboxyl content of oxidized starches, Anal. Chem. 24, 1942-1944.
MA X., BRUCKARD W.J., 2010, The effect of pH and ionic strength on starch-kaolinite interactions, Int. J. Miner. Process 94, 111-114.
MONTES S., ATENAS G.M., 2005, Hematite floatability mechanism utilizing tetradecylammonium chloride collector, Miner. Eng. 18, 1032-1036.
NAKAZAWA Y., WANG Y., 2003, Acid hydrolysis of native and annealed starch and branch-structure of their Naegeli dextrins, Carbohydr. Res 338, 2871-2882.
NIEMELA K., 1990, Conversion of xylan starch, and chitin into carboxylic acids by treatment with alkali, Carbohydr. Res. 204, 37-49.
PAVLOVIC S., BRANDAO P.R.G., 2003, Adsorption of starch, amylose, amylopectin and glucose monomer and their effect on the flotation of hematite and quartz, Miner. Eng. 16, 1117-1122.
PERES A.E.C., CORREA M.I., 1996, Depression of iron oxides with corn starches, Miner. Eng. 9, 1227-1234. PINTO C.L.L., DE ARAUJO, A.C., PERES A.E.C., 1992, The effect of starch, amylose and amylopectin on the depression of oxidize- minerals, Miner. Eng. 5, 467-478.
RAO K.H., NARASIMHAN K.S., 1985, Selective flocculation applied to Barsuan Iron ore tailings, Int. J. Miner. Process 14, 67-75.
ROCHA L., CANCADO R.Z.L., PERES A.E.C., 2010, Iron ore slimes flotation, Miner. Eng. 23, 842-845.
ROBERTS S.A., CAMERON R.E., 2002, The effects of concentration and sodium hydroxide on the rheological properties of potato starch gelatinization, Carbohydr. Polym. 50, 133-143.
SHENG Y., WANG Q., XU X., JIANG W., GAN S., ZOU H., 2011, Oxidation of cornstarch using oxygen as oxidant without catalyst, LWT--Food Sci. Technol. 44,139-144.
SHIBATA J., FUERSTENAU D.W., 2003, Flocculation and flotation characteristics of fine hematite with sodium oleate, Int. J. Miner. Process 72, 25-32.
SOMASUNDARAN P., WANG D., 2006, Chapter 4 Mineral-flotation reagent equilibria, in Developments in Mineral Processing, 17, 73-141.
SUBRANMANIAN S., NATARAJAN K.A., 1988, Some studies on the adsorption behavior of an oxidized starch on hematite, Miner. Eng. 1, 241-254.
TANG M., LIU Q., 2012, The acidity of caustic digested starch and its role in starch adsorption on mineral surfaces, Int. J. Miner. Process 112-113, 94-100.
TOMASIK P., SCHILLING C.H., 2004, Chemical modification of starch, Adv. Carbohydr. Chem. Biochem. 59, 175-403.
WEISSENBORN P.K., WARREN L.J., DUNN J.G., 1994, Optimisation of selective flocculation of ultrafine iron ore, Int. J. Miner. Process 42, 191-213.
WEISSENBORN P.K., WARREN L.J., DUNN J.G., 1995, Selective flocculation of ultrafine iron ore: 1 Mechanism of adsorption of starch onto hematite, Colloids Surf. A: 99, 11-27.
WOOTTON M., HO P., 1989, Alkali Gelatinisation of Wheat Starch, Starch/Stärke 41, 261-265.
YANG Y., LI Y., ZHANG Y., LIANG D., 2010, Applying hybrid coagulants and polyacrylamide flocculants in the treatment of high-phosphorus hematite flotation wastewater (HHFW): Optimization through response surface methodology, Sep. Purif. Technol. 76, 72-78.
Kolekcja BazTech
Identyfikator YADDA bwmeta1.element.baztech-36c0a878-1f99-4541-af94-df168f0b0eaf
Identyfikatory
DOI 10.5277/ppmp150209