Method for determining characteristics of centrifugal sedimentation process of fine particle coal
A technology of centrifugal sedimentation and process characteristics, applied in measurement devices, instruments, scientific instruments, etc., can solve the problems of single particle or low concentration of computational fluid dynamics simulation method, and achieve the effect of real and reliable data and wide adaptability
Active Publication Date: 2017-05-31
CHINA UNIV OF MINING & TECH
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[0004] The purpose of the present invention is to provide a method for determining the characteristics of the centrifugal sedimentation process of fine-grained coal. The static analysis method in the prior art can only reveal the overall operation effect of the centrifugal sedimentation process. low condition problem
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Embodiment 1
[0035] Embodiment 1: The determination method; including the steps of shrinking sample preparation-centrifugal sedimentation-integral freezing-device wall separation-layered cutting-sample analysis, firstly mix and divide the -3mm raw coal and take the coal sample required for the test; then Add raw coal and water to the centrifugal cup to prepare the slurry with the concentration required for the test; place the centrifugal cup in the centrifuge, and carry out centrifugal sedimentation under the set speed and time conditions; place the centrifugal cup after centrifugal sedimentation in the freezer Middle 6h; use the wall heating method to take out the frozen and formed pulp from the centrifugal cup, and use a fixed plane rotating mechanical thin blade to cut the formed coal layer layer by layer according to a certain thickness; after drying the coal samples of each layer, determine the particle size, density composition, etc. analyze. This research method can be used to solid...
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Abstract
A method for determining characteristics of a centrifugal sedimentation process of fine particle coal belongs to a method for determining the characteristics of a centrifugal sedimentation process. The method for determining the characteristics of the centrifugal sedimentation process of the fine particle coal is as follows: ore pulp is prepared from evenly-mixed and divided-3mm raw coal and water, the ore pulp is centrifugally settled, and wholly frozen, frozen-molded solid ore pulp is taken out from a container by a container wall low temperature heating method, coal seams are cut layer by layer by use of a fixed plane rotation mechanical thin blade, and after the cutting, each layer of the sample is dried, and the particle size, density components and the like of each layer of the sample are analyzed; and the characteristics of the centrifugal sedimentation process of the fine particle coal are determined by whole freezing-container wall separation-layer-by-layer cutting as a core. The method for determining the characteristics of the centrifugal sedimentation process of the fine particle coal can be used for nondestructive analysis of the centrifugal sedimentation process of the fine particle coal, detailed analysis of properties of the coal seams with different settlement heights, and investigation of centrifugal parameters and ore pulp characteristics, has wide adaptability, and is suitable for the study and optimization of treatment effects of separation of coal samples with different sizes and density by centrifugal force field.
Description
technical field [0001] The invention relates to a method for determining the characteristics of the centrifugal sedimentation process, in particular to a method for determining the characteristics of the fine coal centrifugal sedimentation process. Background technique [0002] Centrifugal separation equipment (such as centrifuges, cyclones, hydrocyclones, jet milling classifiers, etc.) has the characteristics of small separation particle size, high efficiency, and large processing capacity per unit volume, and is widely used in gas-solid and liquid-solid systems for tiny solids Separation of particles. Centrifugal sedimentation is the basic working process of dense medium cyclone separation, coal slime centrifuge, hydraulic classification cyclone and other equipment in the production of coal preparation plant. The layering characteristics of the centrifugal sedimentation process largely determine the separation and classification. Effect. [0003] At present, the methods ...
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IPC IPC(8): G01N5/00G01N15/04
CPCG01N5/00G01N15/042
Inventor 王大鹏朱子祺胥萌石磊苗真勇晋伟
Owner CHINA UNIV OF MINING & TECH