2021-11-11 Soda roasting and leaching. Sodium hydroxide (NaOH, supplied by Junsei Chemical, 99% purity, Japan) was used for the soda roasting of the spent SCR deNO x catalyst.
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2014-5-1 Sodium stannate preparation from stannic oxide by soda roasting–leaching was proposed. • Effect of roasting and leaching parameters on the Sn leaching efficiency was tested. • Na 2 SnO 3 was easily formed when SnO 2 and Na 2 CO 3 were roasted in a CO/CO 2 atmosphere. • Na 2 SnO 3 3H 2 O with 95.8% purity was obtained from the ...
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2021-6-17 The detailed correlation of the differential thermal analysis with the mechanism of soda-ash roasting and roasting rate-determining steps was presented. Sodium chromate formed after roasting was leached in hot water with the optimisation of leaching parameters, purification of leach liquor and its recovery by crystallisation have been investigated.
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2019-8-15 After soda roasting–water leaching, the main components of CT are analyzed by ICP in Section 2.4 and shown in Table 2. Results show that CT constitutes only 0.63% Cr 2 O 3 and is rich in titanium and iron. Hence, CT can be returned to the blast furnace for the ironmaking process after removal of sodium.
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2012-12-1 Soda-lime roasting was carried out on fine red mud, which was separated from raw red mud physically with particle size below 75 μm, under reductive atmosphere prior to leaching and magnetic separation. The aim was to recover valuable components such as Al, Na and Fe from the fine red mud.
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2016-7-14 Metallurgical ContentRecover Gold by Roasting Pyrite OreRoasting of flotation concentratesRoasting Arsenopyrite Ore for GoldRoasting and leaching a
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2021-6-3 An efficient utilization of chromium-containing vanadium tailings: Extraction of chromium by soda roasting-water leaching and preparation of chromium oxide. Journal of Environmental Management 244 (2019) 119-126. [11] Kyong-Chol Kim, Tao Jiang, Yingzhe Xu ...
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2004-12-27 ed. The method were used for laboratory test is the scheelite roast with soda ash along with subsequent leaching of the roasting products with water. Scheelite concentrate was homogenized with a corresponding quantity of Na2CO3 (1.7 times the stoichiometrically required) and SiO2 and roasted for a period of 1 hour at a temperature of 810oC. Roasted
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2021-11-23 Leaching in KOH If anode slimes have not been previously leached in KOH, Arsenic and antimony are also solubilized with selenium after roasting. Alkaline roasting after KOH leached The study of 0.6 Na 2 CO 3 /slime weight ratios was performed in different time and temperature conditions. After roasting, tellurium remained in the solid.
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2021-6-17 The detailed correlation of the differential thermal analysis with the mechanism of soda-ash roasting and roasting rate-determining steps was presented. Sodium chromate formed after roasting was leached in hot water with the optimisation of leaching parameters, purification of leach liquor and its recovery by crystallisation have been investigated.
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The sequential extraction of vanadium and chromium from the chromium-bearing vanadium slag through two-stage soda roasting-water leaching was proposed. The precipitation order and thermodynamic ...
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2008-8-1 A soda ash roasting process for upgrading titania slag product of Rosetta ilmenite to a high grade titanium dioxide (TiO 2) is presented.The roasting process was carried out at moderate to high temperatures to yield a reaction product that would be easily
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2013-2-7 The present paper deals with soda ash roasting of red sediment ilmenite (47.03% TiO 2) and leaching of obtained titanium rich slag with hydrochloric acid for preparation of synthetic rutile.The experimental conditions used for roasting are Na 2 CO 3 to ilmenite ratio of 1: 1 at 1,223 K for 4 h. This soda ash slag product is subjected to hydrochloric acid leaching to remove the iron content.
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2012-12-24 Abstract−The present paper deals with soda ash roasting of red sediment ilmenite (47.03% TiO2) and leaching of obtained titanium rich slag with hydrochloric acid for preparation of synthetic rutile. The experimental conditions used for roasting are Na2 CO3 to ilmenite ratio of 1 : 1 at 1,223 K for 4 h. This soda ash slag product is subjected ...
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2015-4-17 Soda roasting-caustic soda leaching method was used to recycle the tungsten from 1.4 % tungsten contained alkali leaching slag. The influence of leaching temperature, reaction time, alkali concentration and liquid-solid ratio on the leaching rate of tungsten were
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This study reports on the leaching characteristics of COPR from the soda ash roasting process that contained 8,500 mg/kg of Cr(VI), indicating poor recovery during the leaching process.
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2011-6-24 The kinetics of roasting is given in Fig. 4. The time period of 45 minutes was optimized. 2. Leaching Fig. 1. XRD of devolatilized catalyst. Leaching experiments were carried out by taking the soda roasted Fig. 3. Variation of roasting temperature, Condn: 20% soda, time-1h. Fig. 2. TG and DTA analysis of mixture of catalyst and sodium car-bonate.
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2016-7-14 Metallurgical ContentRecover Gold by Roasting Pyrite OreRoasting of flotation concentratesRoasting Arsenopyrite Ore for GoldRoasting and leaching a sulphide concentrateRoasting and Processing Sulpho-telluride ore to recover
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2021-11-23 Leaching in KOH If anode slimes have not been previously leached in KOH, Arsenic and antimony are also solubilized with selenium after roasting. Alkaline roasting after KOH leached The study of 0.6 Na 2 CO 3 /slime weight ratios was performed in different time and temperature conditions. After roasting, tellurium remained in the solid.
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The sequential extraction of vanadium and chromium from the chromium-bearing vanadium slag through two-stage soda roasting-water leaching was proposed. The precipitation order and thermodynamic ...
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2012-12-24 Abstract−The present paper deals with soda ash roasting of red sediment ilmenite (47.03% TiO2) and leaching of obtained titanium rich slag with hydrochloric acid for preparation of synthetic rutile. The experimental conditions used for roasting are Na2 CO3 to ilmenite ratio of 1 : 1 at 1,223 K for 4 h. This soda ash slag product is subjected ...
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2015-4-17 Soda roasting-caustic soda leaching method was used to recycle the tungsten from 1.4 % tungsten contained alkali leaching slag. The influence of leaching temperature, reaction time, alkali concentration and liquid-solid ratio on the leaching rate of tungsten were
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2018-5-23 Arsenopyrite – Soda Ash Roasting. Arsenic Leaching; Arsenic Precipitation; The ability to process complex precious metal sulfide concentrates containing antimony and arsenic, in an economic and environmentally safe manner, is an important
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The soda-ash roasting method has been proved to be an effective way for boron extraction from low-grade ludwigite ore, by improving the leaching activity of B 2 O 3 with the aid of sodium carbonate [13,14].
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2011-6-24 The kinetics of roasting is given in Fig. 4. The time period of 45 minutes was optimized. 2. Leaching Fig. 1. XRD of devolatilized catalyst. Leaching experiments were carried out by taking the soda roasted Fig. 3. Variation of roasting temperature, Condn: 20% soda, time-1h. Fig. 2. TG and DTA analysis of mixture of catalyst and sodium car-bonate.
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2016-7-14 Metallurgical ContentRecover Gold by Roasting Pyrite OreRoasting of flotation concentratesRoasting Arsenopyrite Ore for GoldRoasting and leaching a sulphide concentrateRoasting and Processing Sulpho-telluride ore to recover
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Different combinations of their roasting processes (with and without salt additives, with oxides, carbonates, or their compositions) and leaching processes (with water or acid) during hydrometallurgical processing were analyzed.The experiment results on the extraction of vanadium in the form of soluble vanadates from the titanomagnetite ore ...
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2017-12-22 Lithium in the pellets is converted by roasting from Li2Si2O5 to Li2SO4. Soluble Li2SO4 is extracted by leaching the roasted pellets with water. Concentration of the leach solution by evaporation precipitates some carbonate impurities. Soda ash is
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2021-11-23 Leaching in KOH If anode slimes have not been previously leached in KOH, Arsenic and antimony are also solubilized with selenium after roasting. Alkaline roasting after KOH leached The study of 0.6 Na 2 CO 3 /slime weight ratios was performed in different time and temperature conditions. After roasting, tellurium remained in the solid.
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