Бидний тухай
Бүтээгдэхүүн
Холбоо барихХязгааргүй брэндийн үнэ цэнэ
Sofol-ийн хийж байгаа зүйл бол хэрэглэгчдэд хэмнэлттэй, тохиромжтой үйлдвэрлэлийн шугамыг тохируулах, брэндийн үнэ цэнийг бий болгох явдал юм.
Нүүр хуудас
021-58386189
Цэс
Sofol-ийн хийж байгаа зүйл бол хэрэглэгчдэд хэмнэлттэй, тохиромжтой үйлдвэрлэлийн шугамыг тохируулах, брэндийн үнэ цэнийг бий болгох явдал юм.
1. Introduction. Fluorite is the main fluorine chemical material, and fluorine chemical products and materials are widely used in various industries, such as machinery, electronics and metallurgy (Garand and Mucci, 2004, Zhang and Song, 2003).They also have important applications in emerging industries such as energy saving, …
Phosphorus, one of the most abundant elements on earth (Krauss et al. 1984; Brunner 2010), is an indispensable nutrient needed for life (Cordell and White 2014; Rowe et al. 2016; Rothwell et al. 2020).As being one of the most important macro-nutrients for plants, approximately 95% of phosphorous is driven from phosphate rocks and used mainly for …
Flotation recovery increased with increasing adsorption density to about recovery at maximum oleate adsorption density at pH 9.0 to 10.0 in the region of the zero point of charge (zpc) of the Nigerian baryte and to about recovery and maximum oleate adsorption density at the temperature range 30 to 40°C, also at the zpc of the …
Agglomeration has shown to be a viable option (Runolinna et al., 1960), and some other methods in fine particles processing, such as selective flocculation flotation, hydrodynamic cavitation and micro bubble flotation, can be used for reference to conduct more work in ilmenite flotation (Matis et al., 1993, Subrahmanyam and Forssberg, 1990 ...
These well explained the sequential flotation separation of barite, fluorite and calcite at pH ∼ 9.0 and 11.0. This work also provided the adhesion force criterion for …
The flotation performance of barite and fluorite at pH 7.5 as a function of GS dosage was presented in Fig.3. It shown that the flotation recovery of barite decreased significantly from 90% to less than 5% with the increasing GS dosage. However, the flotation recovery of fluorite was almost not affected in the presence of GS.
In addition, CA has been reported as a depressant in mineral flotation. Gao et al. (2016) applied CA as the depressant, sodium fluoride as the regulator and sulfuric acid as the collector to separate calcite from fluorite. A calcite concentrate with 85.2% recovery was obtained from a feed ore containing 39.97% fluorite and 17.87% calcite.
The flotation recovery of bastnaesite was significantly affected by dissolved fluorite and barite species. After treatment with fluorite and barite supernatants, the flotation recovery sharply decreased from 62.16% to 8.11% and 24.09%, respectively, at pH 3 and from 90.00% to 9.68% and 39.61%, respectively, at pH 11. (2)
1. Introduction. Pyrite (FeS 2, iron disulfide), is the most abundant sulfide mineral and commonly associated with valuable minerals such as sphalerite, chalcopyrite, galena, gold as well as coal (Wang and Forssberg, 1991, Wang, 1995, Dimitrijevic et al., 1996, Jiang et al., 1998).Pyrite has very low economic significance and is usually …
Fluorite is the most important fluorine industrial raw material and its products have been widely used in many fields such as metallurgical engineering, building materials, ceramics, and medicine (Jang et al., 1995, Jiang et al., 2018). ... C. Liu et al. Selective flotation of apatite from calcite using 2-phosphonobutane-1,2,4-tricarboxylic ...
It is followed by a systematic review of common reagents involved in fluorite flotation, including collectors, depressants, regulators, modifiers, and frothers. …
Wei et al. [13] used sesbania gum as a flotation separation depressant for fluorite and calcite. The experimental results demonstrated that the addition of 100 g/t sesbania gum at pH = 9 partially depressed calcite. Yang et al. [14] used guar gum as a depressant to study its effect on the separation of smithsonite from calcite.
The authors provide insight into the problem of selective flotation of fluorite from quartz–fluorite ores. The flotation of fluorite mineral from ores by using acidized water …
The flotation of bastnaesite, as a major mineral source of rare earth elements, attracting much attention in the mineral processing field, is challenging owing to the natural flotability of calcium-bearing minerals. To promote the application of flotation, we systematically investigated the flotation behavior of bastnaesite, barite, and calcite, …
Fluorite has a fluorine content of approximately 48.7%, and it is the main mineral resource used for the production of fluorine in industries. ... Wei et al. [13] used sesbania gum as a flotation separation depressant for fluorite and calcite. The experimental results demonstrated that the addition of 100 g/t sesbania gum at pH = 9 …
A new version of the automatic activation technique for the determination of fluorine, silicon and barium in fluorspar and barytes using an isotopic neutron source is presented. The main components of the automatic equipment consist of a sampling device and a "one-chamber" irradiation and measurement part with source transfer between the irradiation …
The dominant flotation mechanism for talc and other fluorosilicate minerals is entrainment. However, some talcs exhibit poor natural hydrophobicity which makes them susceptible to floating [22, 23 ...
Beneficiation of Barite Ores. Srdjan M. Bulatovic, in Handbook of Flotation Reagents: Chemistry, Theory and Practice, Volume 3, 2015 34.2 Barite ore deposits. Barite is the only barium mineral used in the production of BaSO 4 of various purities. Barite is not only produced from primary barite deposits, where barite is the primary mineral but there is …
In this review, analyses of the fundamental reasons for the difficulties of flotation separation of fluorite from calcite are performed, from the similar surface properties of both calcium minerals to the …
The separation of calcite from fluorite and barite in a mixed mineral pulp can be achieved by floating fluorite and barite, with >4 × 10 −4 g/L valonea extract to depress calcite flotation, leaving the calcite in the tailings.
1. Introduction. Fluorite is one of the most important fluorine-containing minerals in Earth's crust, and it is composed of calcium and fluorine [1], [2].As an important non-metallic strategic mineral resource, fluorite plays an irreplaceable role in traditional industries such as metallurgy, chemical engineering, and building materials, and in …
However, with higher fluorite amounts of 1.0, 1.2, and 1.4 g 1L, the residual fluorine concentration decreased to approximately 10 mg L1, which meets the drainage standard. Thus, the ...
Procédé de séparation pour minerai paragénétique de baryte de fluorine de faible qualité riche en calcite, comprenant les étapes suivantes : S1 : le concassage ; S2 : le classement pour obtenir un minerai de qualité fine, un minerai de qualité moyenne et un minerai de qualité grossière ; S3 : la réalisation d'une resélection de crible sur le minerai …
This collector has been used in flotation of silicates, such as andalusite, quartz, and kyanite, but also finds application in barite flotation (Zhu et al., 2015, Jin et al., 2016). For example, micro-flotation tests with 0.3 g/L SPS as collector and 1.28 × 10 −6 mol/L of hexametaphosphate (SHMP) as depressant in an alkaline environment pH ...
Roles of barite size on the fluorite flotation using the reagent scheme of GS/NaOl were studied. • The barite particle size significantly affected the fluorite flotation …
Flotation can play an important role in the removal of fluorine from coal. In this study, the optimal amount of flotation reagents was determined by statically designed experiments. Under the optimum condition of 100 g/t diesel oil, 150 g/t 2-octanol, and 200 g/t sodium hexametaphosphate and a 5-minute flotation time provided a 56.81% yield of ...
As shown in Figure 1 a, under the explored stirring speed, the residual concentration of fluorine in water was reduced to less than 13 mg·L −1 within 20 min. In the first 5 min, the reduction rate of fluorine increased with the increasing stirring speed. However, for the precipitation between 5 and 15 min, the reduction rate decreased with …
The flotation performance of 37–74 µm fluorite and different size fractions of barite (−10, 10–37, 37–74 µm) were conducted as a pH function using 1×10 −4 mol/L of collector NaOl and the results of which are presented in Fig. 1.As is shown, the flotation recoveries of fluorite were very high (~90%) across the entire studied pH range in the …
During flotation, particles are separated based on the differences in their surface hydrophobicity. Hydrophobic particles attach to bubbles, facilitating the differentiation between floating and sinking particles [16], [18]. Therefore, flotation can be used to separate the two active materials in black mass (BM) derived from spent LIBs.
For effective removal and utilization of fluorine resources from industrial wastewater, stepwise removal and recovery of fluorine were accomplished by seeding crystallization and flotation. The effects of seedings on the growth and morphology of CaF2 crystals were investigated by comparing the processes of chemical precipitation and …
The single mineral flotation results show that it may be possible to separate fluorite from barite with TSP in the presence of NaOl. Therefore, flotation tests of mixed fluorite and barite (the mass ratio is 4:1) were conducted at pH 8.5 using different dosages of TSP and the best results achieved were shown in Table 1.It can be seen from Table 1 …
The precipitates were then floated to recover calcium fluoride. By stepwise seeding crystallization and flotation, the products with a CaF 2 purity of 64.42% can be used to replace parts of metallurgical-grade fluorite. Both removal of fluorine from wastewater and the reutilization of the fluorine resource were realized.
Dong et al. (Dong et al., 2019b) found that when the dosage of sodium fluorosilicate reached 188 mg/L, the flotation separation of scheelite and calcite could be achieved throughout the entire experimental pH value. However, improper treatment of fluorine-containing wastewater not only severely corrodes equipment but also …
conclusions : the cell flotation has given best results (CaF 2 grade in the fluorite concentrate and lower BaSO 4 grade in the same concentrate), contrary to …
Specifically, the synergistic effect of collectors and depressants on the recovery of fluorite is elaborated for the first time. Finally, the most widely seen fluorite-flotation cases, …
Онлайн чат
Шууд утас