The possibility of flotation separation of calcite and scheelite was explored. The morphology of active ingredients was imaged by atom force microscopy, and infrared spectrum was obtained. ... The froth was scraped out using a plastic blade for 3 min. The froth products were dried and then weighed to calculate the flotation recovery. Zu-chao ...
The optimum pH range for separation of scheelite from calcite was very narrow (pH = 7–8), indicating that the depressant performance of acidified sodium silicate was easily affected by the pH of the slurry. Yan et al reported the use of the mixed collector OPS/BHA to achieve flotation separation of scheelite and calcite (Yan et al., 2017 ...
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generally composed of other minerals such as carbonate minerals represented by calcite (Sanchez-Espana et al., 2002). The flotation separation of magnesite and calcite, which belong to alkaline earth carbonate minerals, is the most commonly used method in industrial separation (Brik, 2011; Tang et al., 2020; Yang et al., 2020).
The results indicated that the separation of fluorite and calcite was impossible in the absence of depressant due to the similar floatability. With the depressant SL, the floatability of calcite was significantly reduced. When the slurry pH was 8.5, the recovery of calcite was about 20%. However, under the same flotation conditions, the ...
Scheelite (CaWO 4), calcite (CaCO 3) and fluorite (CaF 2) are the main three calcium minerals in actual tungsten ores (Fig. 1), in which the calcite content severely restricts the flotation of scheelite in tungsten ore.Our previous studies have proven that lead complexes of benzohydroxamic acid (Pb-BHA) are efficient collector for separating …
The selective depressant of ASKG was first studied and successfully realizing the fluorite and calcite separation by us. The micro-flotation results illustrated that the flotation recovery of fluorite still kept over 90% and that of calcite was around 8% using ASKG as depressant at pH 9.0.
The Plastic Waste Discharges from Rivers and Coastlines in Indonesia report provides the first Indonesia-wide assessment integrating local waste data with actual hydrological conditions to tell the …
Investments to Tackle Plastic Pollution. INDONESIA. This country fact sheet presents the plastic material flow, policy, and investment landscapes, offering quick and easy …
The experiment of mixed-mineral flotation is carried out to determine the effect on the separation of magnesite-calcite mixed minerals. As shown in Fig. 4 a, the recovery of magnesite increases at first and then decrease when the pH is >9.5, and the optimal pH is 9.5 with the recovery of 47.78%. The recovery of calcite increases from 24.65% to ...
This paper proposes luteolin (LUT) as a novel depressant for the flotation-based separation of scheelite and calcite in a sodium oleate (NaOL) system. The suitability of LUT as a calcite depressant is confirmed through micro-flotation testing. At pH = 9, with LUT concentration of 50 mg·L−1 and NaOL concentration of 50 mg·L−1, …
In this study, OBHA was used as collector for the flotation separation of fluorite and calcite. Under a natural slurry pH environment, the recovery of fluorite reached 80 % while calcite recovery was less than 5 % with 3 × 10 −4 mol/L OBHA. The flotation separation of fluorite from calcite can be achieved without the addition of depressants.
Fig. 3 shows the effect of water glass on the flotation performance of scheelite and calcite as a function of (a) water glass dosage and (b) solution pH value. As shown in Fig. 3 (a), when the dosage of water glass is less than 300 mg/L, the flotation recovery of scheelite decreases slightly, illustrating that scheelite is less sensitive to water glass at …
The flask was sealed with a plastic wrap and placed in a constant temperature shaking box at 20 °C for 30 min. Then, the pulp in the flask was taken out and centrifuged at 1800 r/min for 15 min. ... The flotation separation of scheelite and calcite can be realized by using ST as depressant and FX-6 as collector. According to the …
In this work, the synthesis method of amidoxime collector PEBH and its application in the separation of cuprite and calcite were introduced. Subsequently, its collecting performance and selectivity for cuprite and calcite were validated through single/ artificial mixed mineral flotation experiments and the interaction mechanism of PEBH on cuprite was further …
The maximum recovery difference between bastnӓsite and calcite ( R) is presented in Fig. 5, which directly reveals that the separation efficiency of bastnӓsite from calcite using DDHA as the collector is probably better than that using OHA or BHA. Download : Download high-res image (240KB) Download : Download full-size image; …
Fig. 2 shows the effect of three different dosing sequences of mixed depressant on the floatability of scheelite and calcite. When adding Cu 2+ first and then adding CA, scheelite and calcite maintain a good separation effects over a wide pH range (pH=7–10). When adding CA first and then adding Cu 2+, and mixing the reagent …
In general, precipitated calcium carbonate (PCC) is used as a mineral filler in paper industries; while natural calcite (CaCO3) ore is also suitable for industrial use if it is a finely ground high-grade material. Naturally, calcite is found in the form of high- or low-grade ores and it is one of the most widely distributed industrial minerals on the earth's …
This research investigates the behavior towards the plastic waste separation in Indonesia according to the Norm Activation Model (NAM), Theory of Planned Behavior …
A literature review of the plastic pollution problem and policy responses in Indonesia, the world's second-largest plastic waste producer. Learn about the challenges, gaps, and …
The effect of carboxyl methyl cellulose (CMC) on the flotation separation of scheelite from calcite using sodium oleate as collector was studied in this work. The results of flotation tests indicated that CMC could selectively depress the flotation of calcite. However, the addition of calcite strongly strengthened the depressing effect of CMC ...
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In this study, curdlan was used as an efficient and eco-friendly calcite depressant for flotation of fluorite/calcite. Firstly, the structure and molecular weight of curdlan were characterized. Floatation test results showed that the flotation difference between fluorite and calcite was expanded by curdlan, thus enabling the flotation …
The pure minerals of brucite and calcite used in the test were from the Dashiqiao area of Yingkou, Liaoning Province. The X-ray diffraction patterns and chemical composition analysis results for brucite and calcite are shown in Fig. 1 and Table 1, respectively.The theoretical chemical composition of brucite is 69.12 % MgO, and the …
A large share of low-density microplastics (LDMPs) are largely absent from sea surfaces. The present study employs a model that considers the potential of an …
The selective adsorption of GG on the calcite contributed to the separation of fluorite from calcite. Previous research findings have confirmed that the band gap of calcite (5.14 eV) was lower than fluorite (12.1 eV), which means the energy required for electron transition on calcite was smaller and the electronic mobility of calcite was ...
The flotation separation of smithsonite from calcite and quartz using a alkyl diamine ether (GE-609) as the collector was investigated through micro-flotation experiments and the real ore ...
Low-grade and high-reserve scheelite, which is associated with calcite, has similar surface properties that cause difficulty in separation. In this study, sulfomethylated kraft lignin (SMKL) was used as a novel eco-friendly inhibitor for the flotation separation of scheelite and calcite. The flotati …
To understand the consequences of ocean plastic pollution in coastal regions, through the eyes of local people, this study examines the knowledge, use, disposal and local consequences of single use plastics …
Separation performance of CO 2 from calcite surface in gas mixture. Since CO 2-adsorbent materials often work in a multi-gas co-existing environment, the CO 2 separation performance is another significant criterion. Flue gas (CO 2 /N 2) is the most common exhaust gas which can lead to the greenhouse effect [4], [44].
In 2020, Indonesia's solid waste generation reached 67.8 million tonnes (MoEF 2021).1 This number is estimated to continuously grow for the near future. Plastic pollution is part of the country's broader challenge of solid waste management. Plastic waste from Indonesia, as the world's second-largest plastic waste producer, has
1. Introduction. Copper (Cu), an essential metal material to social development, is widely used in many aspects [1], [2], [3].With the consumption of resource for a long time, copper sulfide ores, which are high-grade and easily processed, are facing the problem of exhaustion [4], [5], [6].In this case, the complex and unmanageable …
With a population of 250 million, Indonesia is the fourth most populous country and second-largest plastic polluter in the world after China. The country produces 3.2 million tonnes of unmanaged plastic waste a year, of which about 1.29 million tonnes ends up in the sea. In addition, approximately 10 billion plastic carry bags, equal to 85,000 tonnes, are …
DOI: 10.1016/j.colsurfa.2021.127571 Corpus ID: 240599473; Investigation on the flotation separation of smithsonite from calcite using calcium lignosulphonate as depressant @article{Sun2021InvestigationOT, title={Investigation on the flotation separation of smithsonite from calcite using calcium lignosulphonate as depressant}, …
This is an essay in the field of mineral processing engineering. In China, fluorite mainly exists in the form of concomitant deposits. In the flotation process, other useful minerals are usually preferentially floated, and a large amount of fluorite exists in tailings. In this paper, the restrained fluorite and calcite in the floating tungsten tailings …
Honey calcite has a smooth texture and can be polished to a high shine. This polishing brings out its sunny color and makes it even more striking to look at, especially when the light catches it just right. Where you can find honey calcite. Honey calcite is located mainly in Mexico, where it is found in various mineral-rich regions. …