نتایج جستجو برای: comminution properties

تعداد نتایج: 869792  

Journal: :Journal of endourology 2006
Michaella E Maloney Charles G Marguet Yufeng Zhou David E Kang Jeffery C Sung W Patrick Springhart John Madden Pei Zhong Glenn M Preminger

BACKGROUND AND PURPOSE Shockwave lithotripsy (SWL) has become a first-line intervention for treatment of nephrolithiasis. However, few studies have examined the effects of modifications in the method of shockwave energy administration on comminution efficiency. We propose that a gradual increase in output voltage will produce superior stone fragmentation in comparison with a constant or a decre...

Journal: :Journal of orthopaedic surgery 2015
Jonathan Cowie Raymond Anakwe Margaret McQueen

PURPOSE To identify factors that affect functional outcome one year after distal radial fracture treatment. METHODS 521 women and 121 men aged 16 to 92 (mean, 59) years with distal radial fractures underwent external fixation (n=123), open reduction and internal fixation (n=63), a combination of both (n=10), distal radial osteotomy for symptomatic malunion (n=90), or casting with (n=194) or w...

Journal: :Journal of orthopaedic surgery 2012
Mohammad Zahid Aamir Bin Sabir Naiyer Asif Mohammad Julfiqar A Q Khan Sohail Ahmad Yasir S Siddiqui

PURPOSE To evaluate the use of fibular grafting for fresh femoral neck fractures with posterior comminution. METHODS 18 women and 15 men aged 20 to 60 years underwent osteosynthesis and fibular strut grafting supplemented with 7.0-mm cannulated hip screws for Garden grades III (n=21) and IV (n=12) femoral neck fractures associated with posterior comminution. All fractures were reduced by clos...

2014
Wang Yanhua Wu Fuhua Guo Zhaohan Peng Mingxing Zhang Yanan Pang Zhen Ling Du Minhua Zhang Caiying Liang Zian

This study was aimed to optimize the extraction process for Salvia miltiorrhiza Bunge polysaccharide using response surface methodology The results showed that four operating parameters including microwave power, microwave time and the particle size had notable effects on the polysaccharide extraction of Salvia miltiorrhiza Bunge. The effects could be ranked in decreasing order of importance as...

2016
Wei Zhang

This research is focused on the Phase I SABC milling circuit of the Wushan porphyry copper mine. Improvements to the existing circuit were targeted without any significant alterations to existing equipment or the SABC circuit. JKSimMet simulations were used to test various operating and design conditions to improve the comminution process. Modifications to the SABC comminution circuit included ...

Journal: :The Journal of bone and joint surgery. British volume 1992
D J Pemberton B McKibbin R Savage K Tayton D Stuart

We report our experience with carbon-fibre reinforced plastic (CFRP) plates in the management of 19 problem fractures complicated by either infection, nonunion, comminution or contamination. The combination offers secure fixation without inhibition of callus formation.

Journal: :Journal of the Society of Powder Technology, Japan 1992

Journal: :Journal of the Japan Society of Colour Material 1979

Journal: :JES. Journal of engineering sciences 2021

dability of limestone in their mixtures. This behavior may be attributed to the Representative samples limestone, ilmenite, and quartz, were dry batch ground separately binary mixtures – ilmenite limestone-quartz different compositions ball mill. The study aimed investigate effect mixture composition on mill product characteristics as reflected each two components. results indicated that quartz...

Journal: :journal of mining and environment 2012
m. jahani m. noaparast a. farzanegan g. langarizadeh

in this research, the efficiency of the comminution circuit as well as the efficiency of size classification equipment of the concentrator plant 2 of sarcheshmeh copper complex was studied. the comminution circuit of this plant includes one sag mill in a closed circuit with a vibrating screen and one ball mill with a size classification system of hydrocyclone. the goal of this work was to calcu...

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