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Behavior Of Sio2 In The Leaching Process Of Alumina Clinker:

Behavior of SiO2 in the leaching process of alumina ...

2008-10-1 · Journal of University of Science and Technology Beijing Volume 15, Number 5, October 2008, Page 538 Metallurgy Behavior of SiO2 in the leaching process of alumina

Behavior Of SiO2 in the leaching process of alumina ...

It is essential for alumina production by alkaline process to know the behavior of minerals containing Al and Si in basic solution, and the behavior of SiO2 in the

Behavior of SiO2 in the leaching process of alumina clinker ...

Behavior of SiO2 in the leaching process of alumina clinker with high concentration. J u n l f n v r i f ce c n e h oo yBe n o r a ie st o in ea dT c n lg i g oU y S i

Behavior of SiO2 during Leaching Process of Alumina Sinter

2006-6-20 · Abstract: Some important secondary reactions during alumina sinter leaching have been analyzed thermodynamically, and the behavior of SiO2 in the process also

Decomposition Property of γ-2CaO·SiO2 during Leaching ...

Although γ-2CaO·SiO 2 is more stable than β-2CaO·SiO 2, it will still be decomposed by sodium carbonate solution during alumina leaching process, and this will cause

Effect of Sodium Carbonate Concentration on Leaching ...

The effect of sodium carbonate concentration on alumina leaching of low A/S ratio clinkers and SiO2 concentration in leached liquor was studied in this paper.

(PDF) Effect of Sodium Carbonate Concentration on

The alumina leaching rate and SiO2 concentration in leached liquor increase with the increase of sodium carbonate concentration, and the alumina leaching rate

Efficient separation of alumina and silica in reduction ...

2019-2-1 · Actually, alkali leaching results [14,15] prove that the composition of cubic phase is nearly equal to that of 3Al2O3·2SiO2. In other words, the amount of amorphous

低钙石灰烧结法处理粉煤灰高效提取氧化铝研究-Extraction of ...

Effects of different ratios of calcium oxide to alumina (C/A) and alkali to alumina (N/A) on sintering behavior, pulverization and alumina leaching performance

Efficient separation of silica and alumina in simulated ...

2019-3-15 · As an alkaline leaching method, roasting-leaching process is a potential way to separate silica and alumina in primary alumina-/silica-bearing minerals

Study of synergistic effect mechanism of compound

2020-6-30 · In the process of alumina clinker leaching, the effect of inhibiting the secondary reaction of compound polymer inhibitors composed of polyacrylic acid (PAA) and polyethylene glycol (PEG) adsorption on the surface of β-dicalcium silicate (β-C 2 S) was better than that of single polymer inhibitor (PAA or PEG). ...

Effect of CaO/SiO2 and Al2O3 on Viscous Behaviors of the ...

2016-3-16 · In the Blast Furnace (BF) process, the viscous behaviors of molten slags are essential to the efficiency and the productivity of operations. In this work, the effects of CaO/SiO2 and Al2O3 on the v...

The Sintering and Leaching of Low-Grade Diasporic

An improved lime-sintering process was developed to produce alumina from low-grade diasporic bauxite in this paper. Both clinkers sintered by the real bauxite and simulated bauxite at 1350 °C when the molar ratio of CaO to Al2O3 decreased to 1.4 were produced, the alumina leaching rates of which reached over 90% in sodium carbonate liquor. The main phases in the clinkers after sintering are ...

Effect of Sintering Conditions on the Stability of β-2CaO ...

2018-2-2 · Abstract. In the lime sintering method, adding suitable amounts of Na 2 O can improve the alumina leaching ratio effectively, and reduce the sintering temperature. Meanwhile, the formation of β-2CaO·SiO 2 will lead to a “secondary reaction”. The effect of sintering temperature and holding time on the stability of β-2CaO·SiO 2

Influence of Al2O3, CaO/SiO2, and B2O3 on Viscous

2017-12-31 · The effect of Al 2 O 3 , CaO/SiO 2 , and B 2 O 3 on the viscosity of high alumina and medium titania blast furnace slag was analyzed. An increase in CaO/SiO 2 ratio from 1.14 to 1.44 resulted in higher slag viscosity and break point temperature. They also increased with increasing Al 2O3 content but decreased with adding B2O3 and

Reaction Behavior of Al2O3 and Fe2O3 in Na2O-Al2O3 ...

2009-3-3 · The results also indicate that Al2O3 reacts easily with Na2O×Fe2O3 in sintering process, and Na2O×Al2O3 and Fe2O3 occur in clinker. For example, Al2O3 extraction rate of the clinker reaches to 98.51%. Fe2O3 has double effects on the formation of Na2O×Al2O3. On the one hand, it can accelerate the formation of Na2O×Al2O3 at 1273 K.

Experimental Study on Influence of Al2O3, CaO and SiO2

2021-4-10 · process to treat the gold silver gossan ore, a gold leaching rate of 75%–80% was obtained, and the silver leaching rate could be increased from 40%–45% to 75% after the sample was pretreated with sulfide solution. Celepo et al. [4] explored the pretreatment of alkaline solution before cyanide leaching for gold silver gossan ore.

Synthesis and alumina leaching mechanism of calcium ...

process, but the main phase of the clinker is C4A3S but not 12CaO·7Al2O3, which is consistent with the research of GOODBOY [11]. He found that C4A3S clinker has a good alumina leaching property. It substitutes 12CaO·7Al2O3 as the main phase while the C/A (molar rate between CaO and Al2O3) decreases from 1.71 to 1.33, and a high alumina ...

Conversion of coal gangue into alumina, tobermorite and ...

A large amount of coal gangue from coal mining and processing is regarded as waste and usually stockpiled directly. In order to recycle the valuable elements from the coal gangue, an integrated process is proposed. The process consists of three steps: 1) concentrating alumina from the coal gangue via activation roasting followed by alkali leaching of SiO2 which produces alumina concentrate for ...

(PDF) The effect of chemical composition on the leaching ...

The slag chemical leaching process from EAF carbon steel slag are controlled by the composition influences the leaching behaviour of the slag and thus, oxide species (i.e. CaO, MgO, . . . ) and specific crystalline phases it can be used to forecast the outcome of leaching test.

Development and characterization of sol gel silica

2010-5-19 · desired coatings [18]. The attractiveness of the process lies in tailoring functional properties of coatings by changing precur-sors, thermal treatments or addition of particles in sol. The main advantage of the process is the ability to form inorganic struc-tures at a relatively low temperature and to produce thin homo-

Influence of Al2O3, CaO/SiO2, and B2O3 on Viscous

2017-12-31 · The effect of Al 2 O 3 , CaO/SiO 2 , and B 2 O 3 on the viscosity of high alumina and medium titania blast furnace slag was analyzed. An increase in CaO/SiO 2 ratio from 1.14 to 1.44 resulted in higher slag viscosity and break point temperature. They also increased with increasing Al 2O3 content but decreased with adding B2O3 and

Synthesis and alumina leaching mechanism of calcium ...

process, but the main phase of the clinker is C4A3S but not 12CaO·7Al2O3, which is consistent with the research of GOODBOY [11]. He found that C4A3S clinker has a good alumina leaching property. It substitutes 12CaO·7Al2O3 as the main phase while the C/A (molar rate between CaO and Al2O3) decreases from 1.71 to 1.33, and a high alumina ...

JOURNA L OF NON-CRYSTIILI, SOLIDS Effects of glass ...

2020-1-24 · The leaching and dissolution behavior of two sodium-aluminosilicate glasses, with structures containing one versus ... concentration is a direct function of the alumina content. The concentration of NBO sites influ- ences the reaction rate with H20 , H ÷ and H3 O+ ... This process results in charge compensation and the mobilization of alkali ...

Reaction Behavior of Al2O3 and Fe2O3 in Na2O-Al2O3 ...

2009-3-3 · The results also indicate that Al2O3 reacts easily with Na2O×Fe2O3 in sintering process, and Na2O×Al2O3 and Fe2O3 occur in clinker. For example, Al2O3 extraction rate of the clinker reaches to 98.51%. Fe2O3 has double effects on the formation of Na2O×Al2O3. On the one hand, it can accelerate the formation of Na2O×Al2O3 at 1273 K.

CHAPTER : 6 General Principles & Process of Isolation of ...

2020-4-24 · Concentration of ore is done by leaching. Bauxite is treated with NaOH. Following reaction takes place:- Al2O3+2NaOH+3H2O→2 Na [Al(OH)4] and impurities of Fe2O3, TiO2 &SiO2 are removed. ↓ Na [Al(OH)4], then reacts with CO2 then pure Alumina is

A Mathematical Model for Control and Optimization of ...

2020-9-10 · Rotary Alumina Kiln Process . WEI PENG, RENE V. MAYORGA Faculty of Engineering and Applied Science . University of Regina, 3737 Wascana Parkway, Regina, Saskatchewan, S4S 0A2, CANADA . Abstract: Temperature is a crucial factor for clinker quality in the Industrial Rotary Alumina Kiln Process (IRAKP).

Experimental Study on Influence of Al2O3, CaO and SiO2

2021-4-10 · process to treat the gold silver gossan ore, a gold leaching rate of 75%–80% was obtained, and the silver leaching rate could be increased from 40%–45% to 75% after the sample was pretreated with sulfide solution. Celepo et al. [4] explored the pretreatment of alkaline solution before cyanide leaching for gold silver gossan ore.

Extraction of Alumina from Nawan Kaolin by Acid Leaching ...

ABSTRACT: This paper investigated the production of alumina from Nawan kaolin by acid leaching with sulfuric and hydrochloric acids. Kaolin was calcined at 850°C and was leached with 6 M acid at 90°C, 5M NaOH followed by HCl solutions were added to the leaching liquor, and the precipitated aluminum hydroxide was converted to alumina by calcination at 900°C.

(PDF) The effect of chemical composition on the leaching ...

The slag chemical leaching process from EAF carbon steel slag are controlled by the composition influences the leaching behaviour of the slag and thus, oxide species (i.e. CaO, MgO, . . . ) and specific crystalline phases it can be used to forecast the outcome of leaching test.