Optimization of cavitation venturi tube design for pico and nano bubbles generation

作     者：Xiong Yu Peng Felicia 

作者机构：Department of Mining Engineering West Virginia University 

基　　金：West Virginia State Coal and Energy Research Bureau(WVCERB) the Department of Mining Engineering,West Virginia University 

出 版 物：《International Journal of Mining Science and Technology》 (矿业科学技术学报（英文版）)

年 卷 期：2015年第25卷第4期

页      码：523-529页

摘      要：Hydrodynamic cavitaion venturi tube technique is used for pico and nano bubble generations in coal column flotation. In order to determine the optimal design of hydrodynamic cavitation venture tube for pico and nano bubble generation, a four-factor three-level Central Composite Design of Experimental was conducted for investigating four important design parameters of cavitation venturi tube governing the median size and the volume of pico and nano bubbles. The test results showed that maximum volume of pico and nano bubbles, 65–75%, and minimum mean pico and nano bubble size,150–240 nm, were achieved at the medium ratio of the diameter of outlet of the venturi-tube and diameter of throat(3–4), medium outlet angle(11–13°), high inlet angle(26–27°) and high ratio of the length of the throat and the diameter of throat(2.3–3). Study the effects of the producing pico and nano bubbles on fine coal flotation was performed in a 5 cm diameter 260 cm height flotation column. The optimal percentage of pico and nano bubbles was about 70%, which produced maximum combustible material recovery of 86% with clean coal ash content of 11.7%.

主 题 词：Hydrodynamic cavitation venture tub edesign Pico and nano bubbles Bubble volume and mean size distributions Coal Column Froth flotation 

学科分类：081902[081902] 0819[工学-海洋工程类] 08[工学] 

核心收录：

D　O　I：10.1016/j.ijmst.2015.05.002

馆 藏 号：203742930...