Improvement of the filtration characteristics of calcite slurry by hydrocyclone classification

Vehmaanperä, Paula; Safonov, Dmitry; Kinnarinen, Teemu; Häkkinen, Antti

doi:10.1016/j.mineng.2018.08.042

Cited by 15 publications

(3 citation statements)

References 34 publications

(50 reference statements)

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“…As a result, the spacing of the inclined channels is often large. Hydrocyclone is a continuous classification device that utilizes centrifugal force to accelerate the settling rate of particles and has gained popularity in mining, − chemical and petrochemical industries, − and wastewater treatment − due to the advantages such as ease of operation, high throughput, less maintenance cost, less floor space requirement, and ease of installation. Zhao et al has studied the effect of an integrated multichannel inlet of the Archimedes spiral.…”

Section: Introductionmentioning

confidence: 99%

A New Method for Continuous Classification of Fine Catalyst Particles from a Slurry Bed Fischer–Tropsch Reactor

Zhang

Wang

et al. 2023

Ind. Eng. Chem. Res.

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During the operation of an industrial Fischer−Tropsch plant, fine catalyst particles are continuously generated in the slurry bed, which results in a series of problems, such as reduced flowability of liquid from the filter, reduction of unit processing capacity, and increased catalyst consumption. To solve these issues, a new classification method based on hydrocyclone was proposed to classify fine particles continuously. Cold model experiments using a mimic liquid−solid medium were conducted to verify the feasibility of this new method. The optimized structure and operating conditions were determined by studying the influences of structural parameters, operating conditions, and material physical properties systematically. Side-stream tests were then conducted to evaluate the actual classification performance. The results showed that the performance of the new classification method is primarily influenced by the medium temperature, i.e., the liquid viscosity. When slurry temperature is 200 °C, the coarse loss ratio can be reduced to less than 5% in a single-turn classification test and the fine removal ratio can be maintained at around 30%. With further increases in the temperature (i.e., at lower liquid viscosities), better classification performance can be expected. Finally, a prediction model was established, which can predict the whole classification performance of the new classification method. The model can be used to guide the process design and operation of this method.

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Section: Introductionmentioning

confidence: 99%

A New Method for Continuous Classification of Fine Catalyst Particles from a Slurry Bed Fischer–Tropsch Reactor

Zhang

Wang

et al. 2023

Ind. Eng. Chem. Res.

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“…Therefore, among the various solid-liquid separation technologies and equipment, the hydrocyclone is currently one of the most widely used equipment in industry. So far, the hydrocyclone is widely used in many industries such as mineral processing [7], petroleum [8], chemical industry [9], coal, mining [10], metallurgy [11], and tailings disposal [12].…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation of Flow Field Characteristics and Separation Performance Test of Multi-Product Hydrocyclone

et al. 2019

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A traditional hydrocyclone can only generate two products with different size fractions after one classification, which does not meet the fine classification requirements for narrow size fractions. In order to achieve the fine classification, a multi-product hydrocyclone with double-overflow-pipe structure was designed in this study. In this work, numerical simulation and experimental test methods were used to study the internal flow field characteristics and distribution characteristics of the product size fraction. The simulation results showed that in contrast with the traditional single overflow pipe, there were two turns in the internal axial velocity direction of the hydrocyclone with the double-overflow-pipe structure. Meanwhile, the influence rule of the diameter of the underflow outlet on the flow field characteristics was obtained through numerical simulation. From the test, five products with different size fractions were obtained after one classification and the influence rule of the diameter of the underflow outlet on the size fraction distribution of multi-products was also obtained. This work provides a feasible research idea for obtaining the fine classification of multiple products.

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“…Among the classifying equipment [1,2] currently available, hydrocyclones are one of the most popular pieces of equipment [3,4,5] and can be applied in minering [6] and bio-engineering [7,8] processes and slurry treatment [9] (an emerging field). Based on previous studies, hydrocyclones have proven to be universal devices with various advantages such as its compact size, no moving parts, simple and inexpensive manufacturing, and minimal maintenance.…”

Section: Introductionmentioning

confidence: 99%

Three Output Membrane Hydrocyclone: Classification and Filtration

Lin

2019

Molecules

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In this study, through simulation and experimental verification, we proposed a novel hydrocyclone in which a tubular ceramic membrane passed through the overflow outlet to the underflow outlet. The centers of overflow and underflow outlets were tubular membranes equipped with an exit of outside-in filtration, and the overflow the underflow outlets were shaped into annular (donut shape) exits. Thus, this novel hydrocyclone has three outlets, namely the overflow dilute liquid, the underflow concentrated liquid, and clear filtrate. This system enabled higher dilution of hydrocyclone overflow concentration than that in the traditional system. Furthermore, underflow was more concentrated, and we obtained a clear filtrate. Therefore, this device can simultaneously perform classification and filtration, which is valuable for special liquid recycling. For instance, in wafer cutting fluid recovery in solar energy processes, the fluid with more silicon can function as the overflow, the fluid with more silicon carbide can function as the underflow, and the polyethylene glycol (PEG) organic solvent can function as the clear filtrate.

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Improvement of the filtration characteristics of calcite slurry by hydrocyclone classification

Cited by 15 publications

References 34 publications

A New Method for Continuous Classification of Fine Catalyst Particles from a Slurry Bed Fischer–Tropsch Reactor

A New Method for Continuous Classification of Fine Catalyst Particles from a Slurry Bed Fischer–Tropsch Reactor

Numerical Simulation of Flow Field Characteristics and Separation Performance Test of Multi-Product Hydrocyclone

Three Output Membrane Hydrocyclone: Classification and Filtration

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