Shobhana Dey et al., Response o f process parameters for processing of iron ore slime using column flotation, International Journal of Mineral Pr ocessing, Vol 140, (2015), 58-65. 16.Web

The pre-treatment of bauxite ore from Tayan, West Kalimantan includes washing and screening fine bauxite particles (-2mm) prior as the feed to the Bayer process for producing alumina.Web

Experiment apparatus used for fine bauxite ore flotation: 1—Washing water device; 2—Plexiglass column; 3—Slurry inlet; 4—Packed plates; 5—Peristaltic pump; 6—Air …Web

Abstract. Bauxite is processed in alumina refineries by the Bayer process in which Al-containing minerals are dissolved in hot NaOH. The insoluble solids (bauxite processing residue mud and sand) are washed, sometimes partially neutralized (using CO 2 or seawater treatment), and deposited in impoundments surrounding the refinery using …Web

In this investigation, the fine-grained bauxite ore flotation was conducted in a plate-packed flotation column. This paper evaluated the effects of packing-plates on recovering fine bauxite particles and revealed the fundamental mechanisms. Bubble coalescence and break-up behaviors in the packed and unpacked flotation columns …Web

By reverse flotation of the ore, a high-grade bauxite concentrate with A/S ratio 8.54 was obtained, however the Al 2 O 3 recovery remained low at 42.87%. Although the A/S rate achieved by the flotation was adequate for the Bayer process, Al 2 O 3 recovery was considered to be low for flotation process. It was deduced that the …Web

This paper systematically investigated the leaching behavior of bauxite lithium-rich beneficiation tailings in caustic solution, together with their phase and morphological changes. The main chemical compositions (mass percent) of bauxite flotation tailings were 40.56% Al2O3, 34.00% SiO2, 4.34% K2O, 3.31% TiO2, 1.83% …Web

Abstract and Figures. Alunite is the main non-bauxite source of aluminum. Due to the low Degrees Of Freedom (DOF) of alunite, froth flotation, as a pre-concentration method, is a viable ...Web

Reverse flotation of iron ore is now drawing more attention in iron ore industry as an efficient beneficiation process (Ma et al., 2011, Filippov et al., 2010, Araujo et al., 2005, Houot, 1983). In reverse cationic flotation, silica and silicates are floated after depressing the iron oxide by suitable reagents such as starch, dextrin, and CMC.Web

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 ...Web

The XRF results showed that the main elemental composition of the ore samples used for the flotation tests was characterized by 58.61% Al 2 O 3, 21.11% SiO 2, 3.07% Fe 2 O 3, ... According to the bauxite flotation process, the main factors influencing flotation wastewater were fine bauxite residue, flotation reagent residue, flocculant …Web

The reverse flotation of quartz and other gangue silicate minerals with alkyl amines is an important and well known strategy for the processing of iron ore, low grade bauxite ore, and phosphate rock.Web

An important result of recent bauxite flotation research was the opening in 2002 of the first bauxite mineral processing plant in China (and in the world) which uses direct flotation to prepare a bauxite concentrate for the Bayer process (Zhao et al., 2010). One million tons/yr of bauxite ore can be treated at this plant.Web

The yield of red mud during the processing of bauxite enriched and calcined at 950 °C was 37.62%. ... Aside from the contained minerals from the original bauxite ore feed (e.g., hematite ...Web

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

The first step is to heat the bauxite ore to temperatures of 200°c along with a sodium hydroxide solution. This will convert the aluminium oxide to a solution of sodium aluminate. The silica will dissolve itself in the process. The chemical equation is. Al 2 O 3 + 2 NaOH → 2 NaAlO 2 + H 2 O.Web

The molecular structure of cationic surfactants is closely related to their flotation performance. In this paper, three cationic surfactants with different head group structures were selected as collectors of kaolinite, and the substituent effects were studied by the DFT method. The DFT calculation results showed that increasing the number of …Web

Several processes such as floating process [7, 8], lime process [9−14], and roast-leach process have been developed and applied to producing alumina from …Web

flotation" refers to flotation that collects unwanted material at the froth phase, while the economic material is collected in the base phase. This is beneficial for …Web

Abstract. A high sulfur content is one of the challenges in the processing of refractory bauxites in China. The high carbon content of bauxite makes it more difficult to …Web

The current practice to process bauxite ore from Tayan, West Kalimantan, by PT Aneka Tambang is to wash and screen bauxite ore. The washed bauxite that has particle size +2 mm is believed to have ... understand the reverse flotation of washed bauxite tailing, thus attempts to increase the quality of washed bauxite tailing by such …Web

production is from bauxite by the Bayer process. The bauxite ore with high alumina content. and a high mass ratio of alumina to silica (A/S ratio) is preferred in the alumina industry. The.Web

Bauxite is the principal ore of aluminum processed through conventional Bayer process that involves the ore digestion in concentrated NaOH at a 150-230°C temperature and * 20 atm. pressure [1] [2 ...Web

Reverse flotation 1. Introduction It is well known that almost all of the metallurgical alumina (Al 2 O 3) production in the world has been obtained through the Bayer process used bauxite as a primarily raw material.Web

Bauxite concentrate with an aluminum-to-silicon (A/S) mass ratio of 6.37 and a 77.63wt% recovery rate were achieved via a flow sheet consisting of "fast flotation using a flotation cell, one roughing flotation and one cleaning flotation using flotation columns". Compared with the full-flotation-cells process, the cell-column integration process ...Web

The low-grade bauxite, which is abundant in China, cannot be directly used in Bayer process. Flotation of low-grade bauxite is an effective way to improve the grade. ... sodium oleate dosage 2200 g/t, modified humics dosage 10 g/t. The A/S and Al 2 O 3 recovery of the low grade bauxite ore can reach 7.5 and 72.29% under the optimal …Web

Bauxite is the major alumina (Al 2 O 3 ) bearing ore used in the aluminum manufacturing industries. The bauxite containing less than 50% Al 2 O 3 is called low …Web

Zhang et al. [13] utilized a plate-packed flotation column (PFC) for fine bauxite, and the Al 2 O 3 recovery and grade increased by 2.11% and 1.85%, respectively, compared to the result obtained ...Web