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 ...

Bauxite desilication by flotation, which can process low grade bauxite into high quality bauxite (Gibson et al. 2017; Feng et al. 2009), has become an important technical guarantee for the ...

Besides, 2-BTHA has both thioether and hydroxamate groups, and might be introduced into high-sulfur bauxite to realize desulfurization flotation. However, to our knowledge, there is no report on this aspect. Hence, in this study, we prepared 2-BTHA, and applied it to the flotation separation of pyrite from diaspore.

Reverse flotation is a process that the gangue minerals report to froth products while the valuable minerals stay in the flotation cell as tailing. According to the types of the collector, it can be generally divided into anionic collector reverse flotation and cationic collector reverse flotation. ... bauxite reverse flotation is mainly to ...

The reverse flotation separation of kaolinite and diaspore was achieved at pH 5.5–8.5 by using dodecylamine as a collector and cationic polyacrylamide as a depressant. At pH 5.5–8.5, DDA was mainly in the form of ( C 12 H 25 NH 3 +) 2 and C 12 H 25 NH 3 + cationic ions in aqueous solution, and the main species were of Al OH and Al …

Bauxite flotation, an important part of the Bayer process with dressing, can improve the utilization rate of medium- and low-grade bauxite resources and contribute greatly to the sustainable development of the alumina industry. A large amount of water is needed for bauxite flotation, and most of this water can be recycled by adding a …

1. Introduction. In China, bauxite reserves are general diaspore resources with Al 2 O 3 /SiO 2 mass ratio ranging from 4 to 6 (Deng et al., 2016).To prepare for the feed of Bayer process (normally Al 2 O 3 /SiO 2 mass ratio is more than 8), flotation is an effective physical separation method commonly used to remove part of aluminosilicate …

Flotation experiments showed that packing-plates in the collection zone of a column can improve bauxite flotation performance and increase the …

This paper reports an innovative development: concentrating gibbsite via reverse froth flotation in order to obtain a metallurgical-grade bauxite concentrate. Tailings from an industrial plant have undergone attrition scrubbing and desliming; the quartz silica contained in the tailings has undergone flotation. Starch was used as a depressant, and ether …

The purpose of this work was to evaluate the reverse flotation in Amazonian Bauxite beneficiation to improve its chemical quality (decreases reactive silica grade and …

Aluminum-silicates such as pyrophyllite, illite, kaolinite and chlorite are impurity minerals in diasporic-bauxite, it being necessary to remove these silicate minerals to improve the mass ratio of Al 2 O 3 /SiO 2 of diasporic-bauxite for the Bayer process. A new quaternary ammonium salt (DTAL) has been shown to be efficient in the flotation of ...

This study can be used to guide the application of backwater in the flotation of diaspore bauxite in industry. C 1s NEXAFS approximate energy ranges and primary absorption peaks [45].

The bauxite flotation plants in China, most of which were built and put into production after 2009, retained good flotation indexes by discharging the backwater out of the recycling system and replacing it with fresh water. There are no reports on research and industrial applications of backwater treatment of bauxite flotation.

Bauxite is the main raw material for the alumina industry. Direct flotation is the most widely used method for bauxite beneficiation. In this study, a large number of direct flotation tests were ...

In addition, Fig. 2b shows that the flotation recovery of diaspore and kaolinite had few change with the addition of KCl whether at acidic or alkalic solution, which suggested that KCl had little effect on the adsorption of collector and the flotation of bauxite, the results is consistent with the report of Zhou . Hence, it can be concluded ...

High-sulfur bauxite samples were obtained from Guizhou Province, China. The chemical analysis results of high-sulfur bauxite are shown in Table 1, and the sulfur content is reported to reach up to 3.66%.The phase analysis results of mineral samples are shown in Table 2.Based on Table 2 (Cheng, Niu, et al., 2019), it can be seen that the …

An innovative self-designed medium was packed in a bench-scale flotation column to study its influence on the flotation recovery of bauxite. Computational fluid dynamics (CFD) simulation was conducted to reveal the impact of the packing medium on the turbulent characteristics of collection zone in the column. Simulation results show that multilayer …

There are 4.71 billion tons of bauxite ores reserves in China until 2015 [], and the majority is diaspore bauxite, which has a low ratio of alumina to silica (A/S).Diaspore bauxite was unsuitable for direct extraction of alumina with Bayer process and the Bayer-mineral processing method was developed to be a new approach to make better use of …

The reverse-flotation process cannot achieve effective separation of Al 2 O 3 and SiO 2 from high-ferrous bauxite [13] because high-ferrous bauxite is characterized by a high content of Al 2 O 3 ...

Further studies of bauxite ore flotation were also conducted, and the reverse flotation separation process was adopted. The concentrates with the mass ratio of Al2O3 to SiO2 of 9.58 and Al2O3 recovery of 83.34% are obtained from natural bauxite ore with the mass ratio of Al2O3 to SiO2 of 6.1 at pH value of 11 using the organosilicon cationic ...

2. National & Regional Engineering Research Center for Gang Resources from Metal Mines, Kunming 650093, China. Abstract. With the depletion of high quality bauxite raw …

Abstract. This paper reports an innovative development: concentrating gibbsite via reverse froth flotation in order to obtain a metallurgical-grade bauxite …

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 ...

Flotation experiments showed that packing-plates in the collection zone of a column can improve bauxite flotation performance and increase the smaller bauxite particles recovery. Using packing-plates, the recovery of Al2O3 increased by 2.11%, and the grade of Al2O3 increased by 1.85%. The fraction of 20 m mineral particles in concentrate ...

Flotation has been typically used to increase the mass ratio of Al/Si diaspore ores. •. This study reviewed how different flotation factors can effect on upgrading …

Global Bauxite Flotation Desulfurization Frother Market Insights, Forecast to 2029 - This research report focuses on the Bauxite Flotation Desulfurization Frother Market. It analyzes market size, trends and demand forecasts, as well as growth factors and challenges. The report provides market data breakdowns by type, application, company, …

(This article belongs to the Special Issue Flotation Chemistry of Oxidized Ore) Download keyboard_arrow_down. Browse Figures. Versions Notes. Abstract. A …

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 process condition to obtain low-silica bauxite as the feed for the Bayer process. The experiments were carried out in a 1 L of flotation cell tank.

The open-circuit flotation results also show that a bauxite concentrate with m(Al2O3)/m(SiO2) over 9.3 and Al2O3 recovery over 76% can be obtained from diasporic-bauxite ore.

Bio-related techniques have been proved to be efficient and specific in eliminating impure minerals such as goethite, hematite and kaolinite from aluminum hydroxides in bauxite processing. In this study, the bacterium Paenibacillus polymyxa (P. polymyxa) mediated dissolution and flotation of bauxite were experimentally …