Progress in flotation de-silica
In this work,the main flotation parameters of high silica bauxite (A/S 5.0) including particle size, pulp pH, collector dosage and dispersant dosage were studied. With an optimal condition of 33% ...
(PDF) Reduction of Reactive Silica from Bauxite
The bauxite from Pará-Brazil is a mixture of minerals where gibbsite (Al(OH)3), kaolinite (Al4[Si4O 10](OH)8), quartz, hematite, goethite, rutile and octahedrite are the most important minerals.
Role of silica and alumina content in the flotation of iron …
The flotation results with oleic acid and dodecylamine show better recovery of iron values in the hematite–quartz mixture as well as in the naturally occurring high silica ore compared to the hematite–clay mixture and the high alumina ore respectively. Similarly results on a variety of iron ores show that high silica content as quartz in ...
Light Metals 2016 | SpringerLink
Investigation of Flotation Behaviors of Refractory High-Silica Bauxite. Guihong Han, Lulu Liu, Yanfang Huang, Shuzhen Yang, Dianyuan Dang; Pages 11-14. Download chapter PDF Study on effective extraction of Al and Fe from high-iron bauxite through "calcification-carbonization" method. Zhang Weiguang, Zhang Ting'an, Lv Guozhi, Zhang Xuhua ...
Extraction of alumina and silica from high-silica …
In this paper, a novel process is proposed to extract Al 2 O 3 and SiO 2 from high-silica bauxite without residue discharge, that is, sintering bauxite with Na 2 CO 3 …
Reverse flotation for removal of silicates from diasporic-bauxite
The diasporic-bauxite in China is characterized by a high content of Al 2 O 3 and SiO 2 and a low ratio of Al 2 O 3 to SiO 2 (m ... The diasporic-bauxite ores used in the flotation tests were supplied from Zhengzhou Henan China, and crushed to 0–3 mm by a jaw crusher and double-roller. In the X-ray powder diffraction analysis, it was found ...
INVESTIGATION OF FLOTATION BEHAVIORS OF …
Keywords: High-silica bauxite; Flotation; Al 2O 3 recovery; A/S Abstract High content of silica results in high soda consumption, which limits the use of high-silica bauxite in the production of Bayer alumina. In this work,the main flotation parameters of high silica bauxite (A/S 5.0) including particle size, pulp pH, collector
Progress in flotation de-silica
In this work,the main flotation parameters of high silica bauxite (A/S 5.0) including particle size, pulp pH, collector dosage and dispersant dosage were studied.
Research on the Desulfurization of High Sulfur Bauxite
Effects of particle size of the high-sulfur bauxite, flotation agent dosage, pulp pH main flotation parameters on the sulfur removal rate were mainly discussed. And the optimum conditions can be obtained. ... And the mass ratio of alumina (Al 2 O 3) to silica (SiO 2) (A/S) is 4.41. Especially, the total sulfur content is high to 5.61%.
Mechanochemical Activation of Bauxite | SpringerLink
Separation of silica from bauxite via froth flotation. Minerals Enginnering, (2009), v. 22, n° 04, p. 315–318,. Google Scholar P. Smith. The processing of high silica bauxites — Review of existing and potential processes. ... Mechanochemical treatment of high silica bauxite with lime. Minerals Engineering, vol. 15, p.211–214, 2000 ...
Advances in Beneficiation of Low-Grade Bauxite | SpringerLink
Aluminum industries use bauxite as the major raw material . Bauxite containing less than 50% Al 2 O 3 is called low-grade bauxite ore, which is generally used for the production of aluminum appliances such as abrasives, ceramics, and refractories . The presence of impurities, including silica, iron oxides, and calcium contribute to the …
The processing of high silica bauxites
This paper reports a study that implements reverse flotation method to separate silica from West Kalimantan bauxite ores. The study is aimed to find the good …
Leaching Behaviors of Lithium-Rich Bauxite Flotation
The lithium-rich bauxite flotation tailings are obtained from the Sanmenxia bauxite in Henan Province. The chemical composition of the lithium-rich bauxite flotation tailing samples is presented in Table 1. As seen in Table 1, the Li 2 O content was 0.59%, and the main impurities were Al 2 O 3 and SiO 2. Sodium bicarbonate (AR purity) was ...
Study on New Desilication Technology of High Silica Bauxite
: There are abundant diasporic bauxite resource in China. The gravity separation and flotation process are utilized for treating this kind of ore. When the ore grinding fineness is -200 mesh 80%, the qualified bauxite concentrate can be obtained, and it contains Al 2 O 3 71.62%, SiO 2 8.94%, and its Al 2 O 3 recovery rate is 75.43%, A/S …
A study of bauxite tailing quality improvement by reverse flotation
Reverse flotation has been applied to process high silica bauxite in order to increase the bauxite qual ity, particularly fo r Chinese diaspore [4]. Xia et al [5] used Gemini cationic surfactant ...
Synchronous Desulfurization and Desilication of Low-Grade and High
The existence of sulfur and silica in bauxite influence the product quality of Bayer alumina. The synchronous desulfurization and desilication of low-grade and high-sulfur bauxite through reverse flotation processes were studied using modified starch as depressants in this work. The effects of depressant dosage, modified depressant dosage and collector …
Experimental Investigation on Desiliconization of Low-Grade Bauxite …
Low-grade bauxite resources are abundant in China. However, the high content of silica can not meet the production requirments of alumina. Desiliconization experiments were carried out during the process of one roughing-one cleaning direct flotation in this work using diasporic high-silica bauxite as experimental ore samples, …
(PDF) Kaolinite removal from bauxite by flotation:
By reverse flotation of the ore, a high-grade bauxite concentrate with A/S ratio 8.54 was obtained, however the Al2O3 recovery remained low at 42.87%. ... It was deduced that the separation of ...
Desilication and Recycling of Alkali-Silicate Solution for
Various methods have been applied for bauxite desilication, including flotation desilication,3 biologic desilication,4,5 and desilication by roasting.6 Among these methods, roasting-alkali leaching desilication at atmospheric pressure1,2,7,8, – 9 is the most effective and widely used, because of its advantages of high silica removal ratio …
PAPER OPEN ACCESS A study of bauxite tailing …
Previous research has indicated that bauxite ore can be upgraded by applying reverse flotation method to reduce its silica content in the ore. Therefore, this …
Removal of silicates from gibbsite-bauxite ore by using …
The results of XRF of flotation products show that increasing of alumina content and decreasing of silica content. The optimum pH range of bauxite flotation using DDA and AERO 3000C as collectors can be achieved at pH 4 – 10. From the results, flotation performance using DDA is better than AERO 3000C because get higher Al 2 O …
A review of pretreatment of diasporic bauxite ores by flotation …
Separation of diaspore from bauxite by selective flocculation using hydrolyzed polyacrylamide. Wenli Liu Yue-hua Hu Wei Sun. Materials Science, Environmental Science. 2014. Selective flocculation is a new method to solve the problem of China's bauxite de-silication besides flotation and reverse flotation. The method of selective flocculation ...
Characterization and flotation of low-grade boehmitic bauxite …
Bauxite is the main raw material in primary aluminum production and its reactive silica content and mass ratio of Al 2 O 3 to SiO 2 (A/S) has a critical role in the economic viability of Bayer process. As a major source of the reactive silica, clay impurities should be removed from the ore as much as possible by a beneficiation method such as …
Investigation of Flotation Behaviors of Refractory …
High content of silica results in high soda consumption, which limits the use of high-silica bauxite in the production of Bayer alumina. In this work,the main flotation parameters of …
Alkali Methods for Alumina Extraction from the By-products of High …
More than 90% of bauxite resource in China is diasporic bauxite with the characteristics of a high alumina content (Al 2 O 3 >55%) and a low A/S (mass ratio of alumina to silica) of 5.0–8.0 . As the best quality ore has consumed, more than 70% of bauxite resource in China is characterized with middle-low grade (A/S<7) now in many …
Separation of silica from bauxite via froth flotation
Separation of silica from bauxite via froth flotation @article{Massola2009SeparationOS, title={Separation of silica from bauxite via froth flotation}, author={Camila Peres Massola and Arthur Pinto Chaves and J.R.F. de Lima and Christian Fonseca de Andrade}, journal={Minerals Engineering}, year={2009}, …
Bauxite Beneficiation and Processing | Dry …
However, a high-grade bauxite contains up to 60% Al2O3, and many operating bauxite deposits are well below this, occasionally as low as 30-40% Al2O3. Because the desired product is a high purity Al2O3, the …
Investigation of Flotation Behaviors of Refractory High- Silica Bauxite …
Request PDF | Investigation of Flotation Behaviors of Refractory High- Silica Bauxite: TMS/Light | High content of silica results in high soda consumption, which limits the use of high-silica ...
New insights into flotation mechanism of diasporic bauxite …
1. Introduction. Bauxite is the main source of aluminum metal, and one of its typical types is diasporic bauxite, of which the valuable mineral is diaspore and the main associated gangues are aluminosilicate minerals such as kaolinite, illite, and pyrophyllite [1].Diasporic bauxite is often of poor quality (the content ratio of alumina and silica is too …
Synchronous Desulfurization and Desilication of Low …
and High-Sulfur Bauxite by a Flotation Process Wencui Chai, Guihong Han, Yanfang Huang, Yijun Cao, and Jiongtian Liu Abstract The existence of sulfur and silica in bauxite influence the product quality of Bayer alumina. The synchronous desulfurization and desilication of low-grade and high-sulfur bauxite through reverse flotation processes
