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Tytuł:
Water quality effects on a sulfidic PGM ore: Implications for froth stability and gangue management
Autorzy:
Manono, M. S.
Corin, K.
Wiese, J.
Powiązania:
https://bibliotekanauki.pl/articles/110603.pdf
Data publikacji:
2018
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
entrainment
water quality
froth stability
electrolytes
Depressant behavior
Opis:
Polysaccharide depressants play a crucial role in the flotation of sulfidic PGM bearing ores as they prevent naturally floatable gangue (NFG) from reporting to the concentrate. This action is regarded as critically important because less dilution of the concentrate means lower costs for downstream processes. However, abnormal water conditions such as high concentrations of ions in the flotation system can modify the selectivity of these depressants. It is well known that the existence of selected electrolytes in water can alter the behaviour of some polysaccharide depressants by enhancing their adsorption onto gangue minerals and thereby prevent naturally floatable gangue from moving into the froth phase. Concurrently these same electrolytes may enhance frothability owing to their stabilising effect on the bubbles within the system. Plant water at various ionic strengths was investigated against sodium carboxymethyl cellulose (CMC) dosages in order to understand electrolyte-depressant interactive effects during the flotation of a Merensky ore in a batch flotation cell, using entrainment, rate of NFG recovery, and total gangue recovery as proxies. The study showed that the NFG recovery per unit mass of water decreased with increasing ionic strength at all CMC dosages, however the total amount of gangue reporting to the concentrate increased with increasing ionic strength at all CMC dosages. Thus, this paper considers the effects of both ionic strength and CMC dosage within flotation. It further investigates whether any interactive effects exist between froth stability and entrainment when considered simultaneously.
Źródło:
Physicochemical Problems of Mineral Processing; 2018, 54, 4; 1253-1265
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Utilization of N-carboxymethyl chitosan as a selective depressant for talc in flotation of chalcopyrite
Autorzy:
Liu, Cheng
Feng, Qiming
Shi, Qing
Zhang, Wencai
Song, Shaoxian
Powiązania:
https://bibliotekanauki.pl/articles/110512.pdf
Data publikacji:
2019
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
chalcopyrite
talc
flotation separation
N-carboxymethyl chitosan
Opis:
Flotation separation of chalcopyrite from talc is difficult because of the natural hydrophobicity of two minerals. In this work, the flotation separation of chalcopyrite from talc using N-carboxymethyl chitosan as a depressant for talc was studied. The micro-flotation results indicated that the flotation separation of chalcopyrite from talc cannot be realized effectively at pH 9 with low concentration of N-carboxymethyl chitosan, in the presence of calcium ions, talc was more efficiently depressed by N-carboxymethyl chitosan, while the chalcopyrite recovery was not influenced. Contact angle, zeta potential and adsorption results showed that Ca2+ and CaOH+ absorbed on the talc surface and increased the absorption amount of N-carboxymethyl chitosan on the mineral surface, and increased hydrophilicity of talc surface, resulting the selective depression for talc in chalcopyrite flotation.
Źródło:
Physicochemical Problems of Mineral Processing; 2019, 55, 1; 108-115
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Use of PASP and ZnSO4 mixture as depressant in the flotation separation of chalcopyrite from Cu-activated marmatite
Autorzy:
Wei, Qian
Jiao, Fen
Qin, Wenqing
Dong, Liuyang
Feng, Liqin
Powiązania:
https://bibliotekanauki.pl/articles/109451.pdf
Data publikacji:
2019
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
chalcopyrite
marmatite
polyaspartic acid
mixed depressant
adsorption
Opis:
In this study, the synergistic depressive effect of polyaspartic acid (PASP) and zinc sulfate (ZnSO4) in the flotation separation of chalcopyrite from Cu-activated marmatite was investigated by micro-flotation experiments and ore sample flotation tests, and the possible depressive mechanism was proposed from contact angle measurements, fourier transform infrared (FT-IR) analysis, inductively coupled plasma (ICP) measurements and X-ray photoelectron spectroscopy (XPS) analysis. Microflotation tests indicated that the mixed depressant PASP/ZnSO4 (PZ) exerted strong depressive effect on Cu-activated marmatite in the pH range of 9~12, but it had little effect on chalcopyrite flotation. The ore sample flotation experiments indicated the PZ system decreased the grade of Zn in Cu concentrate by 4.18%, and the depressant consumption was reduced by more than a half. The results from contact angle measurement demonstrated that the hydrophobicity of Cu activated-marmatite surface was higher than that of chalcopyrite surface in presence of PZ. FT-IR analysis demonstrated the more intensive chemisorption of PZ on Cu-activated marmatite surface. ICP measurements showed that PASP had an excellent complexing ability with Cu2+ and Zn2+, which not only reduced the activation of Cu species, but also generated Zn-PASP complex on marmatite surface. XPS analysis indicated a stronger interaction between PZ and Cu-activated marmatite surface, and the depressant PZ may mainly react with Cu-activated marmatite surface through the copper atoms.
Źródło:
Physicochemical Problems of Mineral Processing; 2019, 55, 5; 1192-1208
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The selective depression effect of sodium hexametaphosphate on the separation of chlorite and specularite
Autorzy:
Zhao, Fugang
Yu, Xiankun
Gao, Xiangpeng
Li, Mingyang
Chen, Xiangxiang
Powiązania:
https://bibliotekanauki.pl/articles/24085963.pdf
Data publikacji:
2023
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
flotation
depressant
chlorite
specularite
adsorption
Opis:
Flotation is the most known beneficiation method for the separation of complex and refractory iron ores. As a typical iron-containing silicates, it is difficult to separate chlorite from specularite, because of the similar surface physicochemical properties. In this study, the selective depression effect of sodium hexametaphosphate (SHMP) was conducted via the cationic micro-flotation. The surface adsorption mechanism between SHMP and the two mineral surface was explored through surface adsorption amount tests, Zeta-potential measurements, Fourier transform infrared (FT-IR) and X-ray photoelectron spectroscopy (XPS) analyses. The micro-flotation results indicated that SHMP could selectively depress around 90% of chlorite, while its effect on the floatability of specularite was negligible (<20% depressing). The surface adsorption amount tests, Zeta-potential measurements analysis demonstrated that SHMP selectively adsorb on chlorite surface while on the surface of specularite is feeble. The further surface adsorption analysis via FT-IR and XPS proved that SHMP selective adsorption occurred on the chlorite surface mainly by chemisorption mainly through the chelation reaction between O in the phosphate groups of SHMP molecular and metal ions on surface of chlorite.
Źródło:
Physicochemical Problems of Mineral Processing; 2023, 59, 2; art. no. 166495
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The flotation separation of barite-calcite using sodium silicate as depressant in the presence of sodium dodecyl sulfate
Autorzy:
Chen, Xiong
Gu, Guohua
Liu, Donghui
Zhu, Renfeng
Powiązania:
https://bibliotekanauki.pl/articles/110272.pdf
Data publikacji:
2019
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
flotation
calcite
barite
sodium dodecyl sulfate
sodium silicate
Opis:
The flotation separation of barite from calcite using sodium dodecyl sulfate (SDS) as the collector and sodium silicate (SS) as the depressant has been concretely studied in this paper. The results show that SDS has high collecting ability for both barite and calcite and that the flotation separation of barite from calcite cannot be achieved by using SDS alone. The depressant sodium silicate has a selective depression effect on calcite by the control of the pulp pH at 9.0 in the presence of SDS. Through locked cycle tests, a concentrate containing 95.54% BaSO4 can be obtained from an actual ore containing 24.5% BaSO4, with a recovery of 86.11%. The zeta potential measurements, adsorption analysis and infrared spectrum studies reveal that the pre-adsorption of sodium silicate strongly favors the adsorption of SDS on the calcite surface and adversely affects SDS adsorption on the barite surface. This property is the reason for the selective depression of SS on calcite.
Źródło:
Physicochemical Problems of Mineral Processing; 2019, 55, 2; 346-355
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The effect of lizardite on talc flotation using carboxymethyl cellulose as a depressant
Autorzy:
Deng, Jie
Yang, Siyuan
Zhang, Wencai
Liu, Cheng
Li, Hongqiang
Powiązania:
https://bibliotekanauki.pl/articles/1449414.pdf
Data publikacji:
2020
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
talc
lizardite
flotation
CMC
magnesium ion
Opis:
The effect of lizardite on talc flotation when using carboxymethyl cellulose (CMC) as a depressant was studied by micro-flotation experiments and adsorption measurements, zeta-potential measurements, magnesium ion dissolution analysis, and solution chemistry calculation. The results for the micro-flotation experiments showed that the addition of lizardite further decreased the floatability of talc at pH 8.5 when using CMC as the depressant. The mechanism was that magnesium ions dissolved from lizardite lattice, then formed hydrolyzed species of magnesium cations and interacted with talc surfaces, which promoted CMC adsorption, and thus decreasing talc floatability.
Źródło:
Physicochemical Problems of Mineral Processing; 2020, 56, 4; 702-709
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The effect of a novel depressant on the separation of talc and copper –nickel sulfide ore
Autorzy:
Gu, Guohua
Chen, Zhixiang
Zhao, Kaile
Song, Siyu
Li, Shuangke
Wang, Chongqing
Powiązania:
https://bibliotekanauki.pl/articles/110492.pdf
Data publikacji:
2019
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
Sodium alginate
talc
copper–nickel sulfide
polysaccharide depressant
flotation
Opis:
This paper researched the influence of the polysaccharide polymer sodium alginate (SAG) on the depression of talc at a fixed room temperature about 25 °C through micro flotation and batch flotation experiments, zeta potential and contact angle measurements as well as infrared spectroscopy analysis. The flotation results displayed that the SAG had a significant influence on the flotation of talc but less influence on sulphide flotation. Compared with the depressant carboxymethyl cellulose (CMC) and guar gum, using of the SAG gave the highest copper recovery. It could not only eliminate a talc removal step, but also significantly decrease in the depressant consumption by half at least. Sodium alginate apparently adsorbs on the talc surface and promotes hydrophilization, as revealed by contact angle tests (contact angle decreased from 75 to 33° after treating with SAG). It is demonstrated that the SAG obviously absorbed at the surface of talc but rarely for chalcopyrite through the results of zeta potential measurements and infrared spectroscopy analysis.
Źródło:
Physicochemical Problems of Mineral Processing; 2019, 55, 1; 116-127
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Selective separation of chalcopyrite from jamesonite with guar gum
Autorzy:
Chen, Xiong
Gu, Guohua
Zhu, Renfeng
Wang, Chongqing
Powiązania:
https://bibliotekanauki.pl/articles/110473.pdf
Data publikacji:
2019
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
guar gum
chalcopyrite
jamesonite
flotation depressant
Opis:
A novel reagent, guar gum (GG), is investigated as the depressant on the depression of chalcopyrite and jamesonite, when mixed aerofloat (CSU11) is used as the collector in flotation tests. Kinetics, dynamic potential, adsorption and infrared spectra analysis are performed to study the interaction mechanism between GG and minerals. The flotation results display that selective flotation separation of chalcopyrite from jamesonite is achieved under conditions of depressant GG 2.5 mg/dm3, collector CSU11 10 mg/dm3 and frother MIBC (Methyl isobutyl carbinol) 10 mg/dm3 at pH 5.3. As to mixed minerals flotation, the Cu grade and recovery in the concentrate is 21.35 % and 85.12 %, respectively, indicating that GG has a selective depression effect on jamesonite. Flotation kinetics shows that the addition of GG can dramatically reduce the floatability of jamesonite but hardly influences that of chalcopyrite. The zeta potential and adsorption reveal that the depressant GG adsorbs strongly on the surface of jamesonite. Infrared spectra reveal a dominant chemisorption between GG and jamesonite, while GG occurs weak chemisorption on chalcopyrite surface. This is the reason why GG has excellent selectivity for jamesonite and less effect on chalcopyrite.
Źródło:
Physicochemical Problems of Mineral Processing; 2019, 55, 1; 237-247
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Selective flotation of witherite from calcite using potassium chromate as a depressant
Autorzy:
Qiu, Yangshuai
Zhang, Lingyan
Jiao, Xuan
Guan, Junfang
Li, Ye
Qian, Yupeng
Powiązania:
https://bibliotekanauki.pl/articles/110784.pdf
Data publikacji:
2019
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
witherite
calcite
selective flotation
sodium oleate
potassium chromate
Opis:
Witherite has been widely used as an industrial and environmental source of barium, with calcite being the primary associated carbonate mineral. However, few studies have been conducted to effectively concentrate witherite from barium ores. In this work, with the treatment of potassium chromate (K2CrO4) and sodium oleate (NaOL), witherite was selectively separated from calcite through selective flotation at different pH conditions. In addition, contact angle, Zeta potential, adsorption and X-ray photoelectron spectroscopy measurements were performed to characterize the separation mechanisms. The results demonstrated that NaOL had a strong collecting ability for both witherite and calcite; nevertheless, witherite could be effectively selected from calcite with the highest recovery at pH 9 in the presence of K2CrO4. From the XPS measurements, NaOL and K2CrO4 were found to be primarily attached to the surfaces of witherite and calcite through chemisorption. The presence of K2CrO4 on the surface of calcite adversely influenced the NaOL adsorption, which could make the flotation separation efficient and successful.
Źródło:
Physicochemical Problems of Mineral Processing; 2019, 55, 2; 565-574
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Quinic acid as a novel depressant for efficient flotation separation of scheelite from calcite
Autorzy:
Huang, Zheyu
Kuang, Jingzhong
Yu, Mingming
Ding, Dan
Powiązania:
https://bibliotekanauki.pl/articles/24085979.pdf
Data publikacji:
2023
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
quinic acid
scheelite
calcite
depression
selective adsorption
Opis:
There are difficulties to the conventional depressant for achieving separation of scheelite from calcite for the sake of their similar surface properties. The paper reported that a new depressant quinic acid (QA) was used for separating scheelite from calcite. The adsorption experiments, zeta potential experiment, contact angle, FTIR, XPS analysis and crystal chemistry analysis were utilized to known the depression mechanism of selectivity. The results showed that the recovery of calcite decreased drastically after QA added, whereas hardly influenced on scheelite. The tungsten concentrate could reach 66.24% WO3 grade and 89.46% recovery with 1.5×10-4 mol•L-1 QA at pH=9. The surface adsorption quantity of the QA on calcite was much greater than scheelite, which enhanced significantly the hydrophilicity of calcite surface. Due to its negative charge, QA could be adsorbed on the surface of calcite which had positive charge instead of that of scheelite with negative charge. Subsequently, free carboxyl groups of QA could chelated with Ca2+ species on the calcite surface to form stable chemical adsorption in order to prevent the Pb-BHA to form further adsorption on that, so there was no increase significantly on hydrophobicity. However, QA was obviously weak for adsorbing while Pb-BHA which could still be chemically adsorbed on scheelite surface of pre-treated with QA.
Źródło:
Physicochemical Problems of Mineral Processing; 2023, 59, 2; art. no. 166008
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Partial purification and identification of cardiodepressant factor from the posterior pituitary lobe in rats
Autorzy:
Goraca, A.
Walkowiak, B.
Powiązania:
https://bibliotekanauki.pl/articles/69490.pdf
Data publikacji:
2000
Wydawca:
Polskie Towarzystwo Fizjologiczne
Tematy:
myocardial depressant factor
posterior pituitary lobe
hemorrhagic shock
cardiodepressant factor
purification
rat
identification
Źródło:
Journal of Physiology and Pharmacology; 2000, 51, 1
0867-5910
Pojawia się w:
Journal of Physiology and Pharmacology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On the use of $Na_2SO_3$ as a pyrite depressant in saline systems and the presence of kaolinite
Autorzy:
Arancibia-Bravo, María P.
Lucay, Freddy A.
Sepúlveda, Felipe D.
Cisternas, Luis A.
Powiązania:
https://bibliotekanauki.pl/articles/1446523.pdf
Data publikacji:
2021
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
Na2SO3
IPETC
clays
flotation
saline solution
artificial neural networks
Opis:
The effect of Na2SO3 as a pyrite depressant in NaCl and KCl saline media and the presence of kaolinite were evaluated by zeta potential tests. Chalcopyrite was also included in the study, because pyrite usually accompanies this mineral. Subsequently, the floatability results of both minerals in the NaCl solution were optimized based on the design of experiments (DoE). The Box–Behnken DoE was applied considering the percentage of kaolinite $(X_1)$, collector dose $(X_2)$, and depressant dose $(X_3)$ as factors. The results were modeled using artificial neural networks (ANNs) to construct contour plots and to determine the optimal conditions. In particular, maximization of the mass recovery of chalcopyrite and minimization of that of pyrite were sought. The particle swarm optimization algorithm was used as an optimization technique. The results indicated that the optimal conditions to maximize the floatability of chalcopyrite were kaolinite 6.85%, collector dose $3.58 × 10^{–3} mol$ / $dm^3$, and depressant dose $3.49 × 10^{–5} mol$ / $dm^3$. On the contrary, the optimal conditions to minimize the floatability of pyrite were 5% kaolinite, collector dose $5 × 10^{–4} mol$ / $dm^3$, and depressant dose $6.4 × 10^{–5} mol$ / $dm^3$. Under these conditions, the mass recoveries of chalcopyrite and pyrite were 66.1% and 14.0%, respectively. The results also indicated that the presence of kaolinite negatively affects the flotation of chalcopyrite, while the effect of $Na_2SO_3$ is not significant. In general, the findings suggest that $Na_2SO_3$ is a viable alternative to consider as a pyrite depressant in saline environments.
Źródło:
Physicochemical Problems of Mineral Processing; 2021, 57, 4; 168-179
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
New method of electrostatic separation of the oxidized iron ore
Autorzy:
Idres, A.
Bouhedja, A.
Bounouala, M.
Benselhoub, A.
Powiązania:
https://bibliotekanauki.pl/articles/89112.pdf
Data publikacji:
2016
Wydawca:
Politechnika Wrocławska. Wydział Geoinżynierii, Górnictwa i Geologii. Instytut Górnictwa
Tematy:
iron ore
electrostatic separation
reagent-collector
reagent–depressant
efficiency
Opis:
The complexity of the mineralogical, chemical and exogenous parameters generates a low efficiency of electrical separation of oxidized iron ore. For this purpose, a study was conducted to provide a method for electrostatic separation and to select the chemical reagents. And this, for increasing the contrast of the dielectric separating minerals in the corona discharge field. The reagent-collector used is the auramine with a specific consumption of 0.3 kg/t. Whereas, the reagent depressants is carboxymethyl cellulose mixture with a specific consumption of 0.25 kg/t. From the obtained test results electrical treatment of oxidized iron ore are satisfied for proposed process.
Źródło:
Mining Science; 2016, 23; 33-41
2300-9586
2353-5423
Pojawia się w:
Mining Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ligandy receptora NMDA w leczeniu zaburzeń depresyjnych
The NMDA receptor ligands in anti-depressant therapy
Autorzy:
Stasiuk, Weronika
Warchulińska, Joanna
Olszewska, Anna
Poleszak, Ewa
Powiązania:
https://bibliotekanauki.pl/articles/943323.pdf
Data publikacji:
2016
Wydawca:
Instytut Medycyny Wsi
Tematy:
depresja
receptor nmda
terapia przeciwdepresyjna
Opis:
Wprowadzenie. Nowy kierunek badań nad zaburzeniami depresyjnymi koncentruje się na hamowaniu aktywności receptora NMDA, co stwarza nowe możliwości leczenia chorób wywołanych nadmierną aktywacją układu glutaminianergicznego. Cel pracy. Celem prezentowanej pracy jest przegląd ligandów (w szczególności antagonistów) receptora NMDA działających na jego ekspresję i funkcje oraz ich wpływ na działanie klasycznych leków przeciwdepresyjnych. Opis stanu wiedzy. Skuteczność obecnie stosowanych metod leczenia zaburzeń depresyjnych jest niezadowalająca i obarczona wieloma skutkami ubocznymi. Niepokojący jest również fakt, iż u wielu pacjentów rozwija się lekooporność. Dlatego też opracowuje się nowsze, skuteczniejsze metody leczenia. Wykazano, że jednym z istotnych mechanizmów działania przeciwdepresyjnego jest blokowanie receptora NMDA. Podsumowanie. Wprowadzenie do lecznictwa antagonistów receptora NMDA stwarza nowe możliwości terapeutyczne zaburzeń depresyjnych, a także wydaje się być interesującą alternatywą w leczeniu depresji lekoopornych.
A new direction in research on depressive disorders focuses on reducing the activity of the NMDA receptor, which opens up new possibilities for the treatment of diseases caused by the excessive activity of the glutamatergic system. The aim of this work is the study of ligands (especially antagonists) of the NMDA receptor, which influence its expression and function as well as their impact on the action of classic anti-depressant medications. The effectiveness of currently utilized depressive disorder treatment methods is unsatisfactory and linked to many sideeffects. It is also a worrying fact that many patients develop drug resistance. This is why there is a continued effort for the development of newer, more effective treatment methods. It has been shown that one of the key anti-depressant mechanisms of action is through the blockage of the NMDA receptor. The introduction into the treatment regime of antagonists of the NMDA receptor opens new therapeutic possibilities in the treatment of depressive disorders, as well as being a potential alternative in the treatment of drug resistant forms of the disease.
Źródło:
Medycyna Ogólna i Nauki o Zdrowiu; 2016, 22(51), 3
2083-4543
Pojawia się w:
Medycyna Ogólna i Nauki o Zdrowiu
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Investigations on soluble starch as the depressant of hematite during flotation separation of apatite
Autorzy:
Bai, Shaojun
Ding, Zhan
Fu, Xianyu
Li, Chunlong
Lv, Chao
Wen, Chao
Powiązania:
https://bibliotekanauki.pl/articles/110115.pdf
Data publikacji:
2019
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
soluble starch
depressant
hematite
apatite
FTIR
XPS
Opis:
In this paper, soluble starch was studied as a depressant of hematite during flotation separation of apatite using sodium oleate as a collector. Surface charge measurement, soluble starch adsorptions, Fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS) were used to understand the interaction mechanisms between minerals (hematite and apatite) and soluble starch. The results indicated that chemical interaction between hematite and soluble starch was present, and supported the bonding of hydroxyl, while physical adsorption of soluble starch molecules with apatite occurred. Results of micro-flotation studies suggested that soluble starch was considered as a selective depressant for hematite. The maximum recovery difference between hematite and apatite of 77.5% was obtained with 40 mg/dm3 soluble starch. The flotation experiment results of natural iron ore showed that flotation indexes with 59.73% Fe, iron recovery of 81.5% and 75.68% of dephosphorization ratio were achieved at a soluble starch dosage of 60 mg/dm3. However, a higher dosage of soluble starch addition caused the difficulty for flotation separation of apatite from hematite. Our results provided theoretical basis for the flotation separation of apatite from iron oxide ores.
Źródło:
Physicochemical Problems of Mineral Processing; 2019, 55, 1; 38-48
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 29

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