The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
The dry separation of fine coal provides a feasible, low-cost and pollution-free method for the pre-arsenic removal from coal prior to combustion. In this study, the arsenic (As) occurrence of the coal from Wangjiazhai coal mine in China and the corresponding migration law in the dissociation process were investigated. Accordingly, it was proposed for the vibrated dense medium fluidized bed (VDMFB)...
Screening is an indispensable unit operation for the large-scale separation of materials. A variable amplitude screen (VAS) has a high screening efficiency and reliable performance in coal beneficiation and is widely used for coal classification. In this study, the kinematic characteristics and process analysis of a novel VAS for coal classification were investigated. The vibration test results show...
Screening has been widely used for the classification of particulate materials. Equal-thickness screen, which is characterized by large capacity and high efficiency, has been extensively applied in coal processing in recent years. In this paper, the method of multistage sampling and multilayer screening was used to analyze the particle size of screening products, the effects of screen surface inclination,...
The fluidization of Geldart B particles commonly falls under the bubbling fluidization category, where the coalescence of bubbles is the dominant phenomenon. If the diameter of bubbles becomes too large, the fluidization quality will deteriorate and lead to significant maldistribution of bed density. In this study, a pronation-grille baffle was introduced into a gas-solid dense phase fluidized bed...
Stable fluidization with consistent flow and a reasonable separating density are keys to the highly efficient separation in a secondary air-distribution fluidized bed separator (SADFBS). In this study, a binary dense medium was formed by mixing fine coal with magnetite powders. The optimum secondary air-distribution layer (SAL) height of 13mm was obtained by verifying the density uniformity of the...
Dry beneficiation of fine coal is increasingly significant for the clean utilization of coal resources in drought regions. In this paper, a continuous vibrated gas-fluidized bed separator was developed for fine coal dry beneficiation. The fluidization behavior and the kinematic properties of fine coal particles in this separator were systematically investigated. The results show that the bed expansion...
Coal is one of the most important primary energy sources worldwide. With the shortage of water resources and increasing acid rain, the studies on dry coal beneficiation have become more and more important. In this study, a gas-vibro fluidized bed introducing active pulsing gas into an air-dense medium fluidized bed was used for the deash and desulfurization of fine coal. The effects of gas velocity...
The segregation characteristics of fine lignite (−3+1mm) in a vibrated gas-fluidized bed were examined. The pressure drop, ash contents and mass of a certain size fraction in lignite particles as a function of height through the bed, ash separation index, corresponding bed snapshots, and bubble size were investigated by varying superficial gas velocity. The effects of vibration parameters (frequency,...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.