- منطقة بودونغ الجديدة ، شنغهاي ، الصين .
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The urgency to engineer the removal of atmospheric CO2 has driven the exploration of innovative methods for direct conversion into valuable products, with a specific emphasis on calcite as a promising approach for carbon dioxide sequestration.
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Consequently, the selective separation of scheelite from calcite is crucial for the efficient use of scheelite resources. ... POCA effectively minimizes pollutant emissions during the flotation process, contributing to the process's green and sustainable nature. Additionally, this study offers a theoretical foundation and experimental support ...
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In contrast, chemical efficiency is defined as the main injected chemicals (calcium and urea) precipitating as calcium carbonate. Thus, a chemical efficiency does not ensure overall process efficiency unless precipitation takes place in …
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This paper has presented a mini review of previously published articles dealing with bio-cement production using enzyme-induced calcite precipitation (EICP) technique. EICP is a biological, sustainable, and natural way of producing calcite without the direct involvement of microorganisms from urea and calcium chloride using urease …
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of the process. Metal sulphide/silicate impurity minerals can be re moved by the froth-flotation process using amines and xanthate ... Calcite is one of the most abundant simple salts in the earth 's ... The reasons are (1) flotation is highly efficient as compared with the physical separation processes. (2) Magnetic separa-tion proved ...
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Adsorption and depression mechanism of an eco-friendly depressant dextrin onto fluorite and calcite for the efficiency flotation separation. Author links open overlay panel Yuangan Chen a, Bo Feng a b c ... During the flotation process, the surface of fluorite and calcite is prone to partial dissolution, which makes the surface …
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The keywords related to MICP were divided into five modules: biomineralization and soil improvement, calcite self-healing concrete, permeability, MICP, carbonate precipitation and self-healing concrete. ... The CO 2 capture efficiency of the MICP process should be assessed and optimized under different conditions.
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Presently, the flotation desilication process of magnesite is mature but flotation separation process of calcium-containing gangue minerals (dolomite and calcite) is challenging because the crystal structures, surface properties, and physicochemical properties of magnesite, dolomite, and calcite are similar and mineral interactions, …
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Adsorption and depression mechanism of an eco-friendly depressant dextrin onto fluorite and calcite for the efficiency flotation separation. Author links open overlay panel Yuangan Chen a, Bo Feng a ... [12]. During the flotation process, the surface of fluorite and calcite is prone to partial dissolution, which makes the surface ions convert ...
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Therefore, it is imperative to find efficient and economic inhibitors to increase the separation efficiency of magnesite and calcite. In the previous research, we studied the influences of sodium hexametaphosphate, sodium tripolyphosphate and dextrin for the flotation behavior of magnesite and calcite under the condition of NaOl as collector.
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The XRD results showed the precipitation of calcite and dolomite. The combination that produced the highest amount of thermally stable calcite with a minimal amount of aragonite, highest precipitation efficiency was further selected for the sand consolidation experiment.
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Future research should also attempt to replicate the formation of coherent nanoparticles in minerals or ceramics by crystallization from an amorphous precursor, with the aim of developing an energy-efficient process for increasing the fracture toughness of ceramic materials.
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As the exploitation of easily processed fluorite deposits continues, it is critical to improve the flotation separation efficiency of difficult-to-process fluorite resources (fluorite-calcite type ore), and the utilization of highly selective depressants or collectors is an effective method to overcome this problem.
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Flotation is widely employed as a technique for separating scheelite from calcite [4], [5]. Sodium oleate is frequently utilized as a collector in scheelite flotation [6], [7], yet its selectivity is limited [8], [9]. Consequently, the selection of suitable depressants during the flotation process is essential for enhancing separation efficiency.
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An efficient method of microbial-induced calcite precipitation (MICP) for cementation of sand particles and the influence of initial pH value of the culture medium on the growth of bacteria was discussed and results showed that the urease-producing bacteria S. pasteurii can be cultured at the initial pH values of 7–10, while a higher pH …
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Having a higher amount of Urea-CaCl 2 solution helps for an efficient MICP process. The effective preparation of cementation solution lead to having more calcite precipitation in every gap or space and the surrounding of the particles in turn creates overall strength. ... The way of injection solution has its effect on the amount and …
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However, the dissolution or precipitation of calcite/dolomite planes on minerals/solution interface during long-term GCS process develops intergranular porosity and thus affects the permeability and stability of reservoirs. To investigate this process, both calcite and dolomite were dissolved in acetic and carbonic acids.
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