No. 1688, Gaoke East Road, Pudong new district, Shanghai, China.
No. 1688, Gaoke East Road, Pudong new district, Shanghai, China.
Closed-circuit flotation tests showed that reverse flotation de-silicating can be achieved by a new reagent scheme (DTAL, SFL and MIBC) to obtain a bauxite concentrate …
Over the last three years significant progress has been made in developing a viable reverse flotation technology to upgrade the Chinese diasporic bauxite to an alumina to silica mass ratio greater ...
In the reverse flotation of bauxite ore, dispersants are used to increase the opportunity of interactions between fine particles and reagents (depressants and collectors) in the pulp. Sodium carbonate has been widely used as a dispersant for kaolinite and has proven to be effective in reverse flotation (Marino, 2012, Liu-yin et al., 2010).
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 ...
During bauxite flotation, flotation indexes decrease with increasing water circulation time, resulting in the discharge of bauxite flotation wastewater as well as a waste of resources and great ...
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 …
In a fundamental study, the best conditions determined in the first step were evaluated for the flotation of kaolinite from bauxite ore using laboratory scale ex-periments. Tests with …
Surface pretreatment of low-grade bauxite using oxalic acid was carried out prior to the flotation experiments. 500 g of bauxite samples with a 60% pulp density was firstly ground to 85% < 0.075 mm. After the slurry was transferred to a beaker, a certain amount of oxalic acid solution was added to keep its concentration of 0.01, 0.05, 0.5 mol/L.
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-amine as the …
high-sulfur bauxite is mainly sulfide, containing a small amount of sulfate. It is difficult to remove sulfur sulfate through flotation, so the primary target mineral for desulfitization is pyrite. 2.2. Methods 2.2.1. Flotation test All flotation experiments were performed in a flotation cell (1.5 L, XRF, China), and the agitation speed was ...
synthesized PAFS had polymeric aluminum, iron and hydroxyl structures. Wastewater disposal test of synthetic PAFS shows that the removal rates of COD, turbidity and chromaticity are 45.61%, 75% and 94.18%, respectively. 1 Introduction High-sulfur bauxite flotation tailings is a kind of solid waste discharged from the bauxite ore beneficiation
This paper is one of a study that implements reverse flotation methods as an alternative beneficiation on bauxite processing. This study is aimed to increase alumina content in bauxite so its qualified as feed of Bayer Process …
The technological schemes of direct or reverse flotation separation of aluminum silicate minerals from bauxite were suggested. The fundamentals involved the technologies were studied. The relationship of collectors, dispersant and pH can be determined by solution chemical calculation in the direct flotation of bauxite by anionic collectors.
Bauxite flotation wastewater can be recycled back to the process after treatment by a combined biological-coagulation method. Biological pretreatment, in which Labrenzia …
High-sulfur bauxite Desulfurization Flotation Regulator Introduction High-sulfur bauxite resources exceed 800 million tonnes in China [1]. Sulfur contained in this kind of bauxite severely ... The natural pulp pH value was measured after the test sample ore was ground to 78 ± 2% < 0.074 mm, and pulp density was controlled to 30%. The SO
Closed-circuit flotation tests showed that reverse flotation de-silicating can be achieved by a new reagent scheme (DTAL, SFL and MIBC) to obtain a bauxite concentrate …
In this study, the bauxite ore for batch flotation test and diaspore and kaolinite samples for micro flotation test were obtained from Dengfeng, Henan Province, China. The valuable mineral and primary gangue mineral of bauxite ore are diaspore and kaolinite, respectively. Table 1 shows the chemical composition of this bauxite sample.
During bauxite flotation, flotation indexes decrease with increasing water circulation time, resulting in the discharge of bauxite flotation wastewater as well as a waste of resources and great environmental safety risks. To determine how to return the wastewater back to the flotation process, this study aimed to identify the main components affecting the flotation …
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. …
tion of diaspore and kaolinite was investigated by flotation test. It is found that HAS depresses diaspore but acti- vates kaolinite in acidic pulp,while HPAM activates both diaspore and kaolinite in the pH range of 2.0 - 10. ... As for reverse flotation of bauxite, it is found that the suitable modifiers are the key components to ensure a ...
Batch pre-desilication test results of a high reactive silica boehmitic bauxite from Nyírád (Hungary) ar e shown on Figures 4.4-9 [8]. The bauxite contained 48.8 % Al 2 O 3, of which 37 % was ...
This paper reports an innovative development: concentrating gibbsite via reverse froth flotation in order to obtain a metallurgical-grade bauxite concentrate. Tailings from an …
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.
In this work, oxalic acid was selected as surface modifier to pretreat low-grade bauxite, and flotation performances were investigated through batch flotation tests. The surface pretreatment mechanisms were explored through adsorption experiments and advanced analysis techniques including ICP analysis, XPS analysis, and zeta potential measurement.
Apart from studies on the flotation of copper minerals, in this Special Issue, there are two papers on the recovery of fine bauxite [13] and elemental sulfur [14] by flotation.
The effect of Al3+ in backwater on the flotation of diaspore bauxite was investigated by micro-flotation tests and the underlying mechanisms were investigated by inductively coupled plasma (ICP) measurement, zeta potential measurements, solution chemistry analyses, and synchrotron near edge X-ray absorption fine structure (NEXAFS) analyses. The …
As the mainstreams of bauxite desulfurization technologies, the bauxite pre-desulfurization (roasting, electrochemistry, biology, flotation, etc) and Bayer process desulfurization (oxidation and precipitation) need to be fully understood for the further improvement of desulfurization performance.
However, oleic acid collectors are still widely used in bauxite flotation as the most commonly used collectors (Deng et al., 2015; Wang et al., 2017) ... Figure 1 is the flow chart of the flotation test. For single mineral …
Kaolinite removal from bauxite by flotation Rem: Revista la de Minas, vol. 69, núm. 3, julio-septiembre, 2016, pp. 349-353 Universidade Federal de Ouro Preto ... Each test was fed with 200 g of bauxite ore and 700 mL of water, the % solids of the pulp being 22%. The gas flow rate was 6 NL/ min. These experiments were done at
2.1. Test sample ores The acidified high-sulfur bauxite used in this test came from bauxite mines in Henan province (1#), Zunyi province (2#), Gongyi Henan province (3#) and Changtong Henan province (4#). The main chemical compositions of these bauxite ores are shown in Table 1, while their mineral phase analysis is shown in Table 2.
