نتایج جستجو برای: comminution properties

تعداد نتایج: 869792  

Journal: :Mineral Processing and Extractive Metallurgy Review 2021

The lunar surface is extremely harsh and current mineral processing metal extraction technologies are not adequately equipped to address this environment. In paper, we review the metals available for conditions at surface, analyze challenges associated with comminution, beneficiation, operations. potential beneficial effects of natural also evaluated. This investigation concludes that process p...

پایان نامه :دانشگاه آزاد اسلامی - دانشگاه آزاد اسلامی واحد تهران مرکزی - دانشکده علوم پایه 1391

one of the applications of nanotechnology is use of carbon nanotubes for the targeted delivery of drug molecules. to demonstrate the physical and chemical properties of biomolecules and identify new material of drug properties, the interaction of carbon nanotubes (cnts) with biomolecules is a subject of many investigations. cnts is a synthetic compound with extraordinary mechanical, thermal, el...

Journal: :Computers & Chemical Engineering 2017
Aaron Spettl Maksym Dosta Frederik Klingner Stefan Heinrich Volker Schmidt

In process engineering, the breakage behavior of particles is needed for the modeling and optimization of comminution processes. A popular tool to describe (dynamic) processes is population balance modeling (PBM), which captures the statistical distribution of particle properties and their evolution over time. It has been suggested previously to split up the description of breakage into a machi...

2003
Michael R. Bailey Robin O. Cleveland Tim Colonius Lawrence A. Crum Andrew P. Evan James. E. Lingeman James A. McAteer Oleg A. Sapozhnikov James C. Williams

OBJECTIVE: Shock Wave Lithotripsy (SWL) is the use of shock waves to fragment kidney stones. We have undertaken a study of the physical mechanisms responsible for stone comminution and tissue injury in SWL. SWL was originally developed on the premise that stone fragmentation could be induced by a short duration, high amplitude positive pressure pulse. Even though the SWL waveform carries a prom...

Journal: :The Orthopedic clinics of North America 2013
Anna N Miller Daphne M Beingessner

Distal humeral fractures are relatively rare and complex injuries. With appropriate preoperative planning and execution of surgical technique, good outcomes may be obtained in most patients. Patients should be counseled regarding loss of motion in these injuries, and elderly, osteoporotic patients with extensive comminution should be considered for total elbow arthroplasty as an alternative to ...

Journal: :The Iowa orthopaedic journal 2015
John T Riehl Keith Connolly George Haidukewych Ken Koval

BACKGROUND Many types of projectiles, including modern hollow point bullets, fragment into smaller pieces upon impact, particularly when striking bone. This study was performed to examine the effect on time to union with retained bullet material near a fracture site in cases of gunshot injury. METHODS All gunshot injuries operatively treated with internal fixation at a Level 1 Trauma Center b...

Journal: :The Journal of urology 2004
Yufeng Zhou Franklin H Cocks Glenn M Preminger Pei Zhong

PURPOSE We developed innovations in shock wave lithotripsy (SWL) technology. MATERIALS AND METHODS Two technical upgrades were implemented in an original unmodified HM-3 lithotriptor (Dornier Medical Systems, Inc., Kennesaw, Georgia). First, a single unit ellipsoidal reflector insert was used to modify the profile of lithotriptor shock wave (LSW) to decrease the propensity of tissue injury in...

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