Grovetown, GA, United States
Grovetown, GA, United States

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Wang Y.P.,University of Alberta | Li D.Y.,University of Alberta | Parent L.,Suncor Energy | Tian H.,GIW Industries Inc.
Wear | Year: 2011

This study was conducted with attempt to break through the bottleneck using a new concept - high-entropy microstructure. It has been recently demonstrated that an alloy containing more than five elements with the concentration of each element in the range of 5-35% could have a so-called high-entropy microstructure, which is very fine without large-sized intermetallic phases that reduce the resistance to fracture during high-stress wear and impact wear. In this study, this new concept was applied to modify a white cast iron by adding a few carbide-forming elements to the material simultaneously. The carbide-forming elements mutually competed to form their own carbides and this competition also helped to suppress the growth of the carbides, so that carbide refinement could be achieved. Strong carbide-forming elements, Ti, V, Mo and W, were simultaneously added to Fe-20Cr-5C alloy. As the amount of added elements increased, primary M7C3 in the original white cast iron was eliminated with the formation of various finer carbides, including eutectic M7C3, MC and M6C. Compared to unmodified white cast iron, the modified alloys have demonstrated promising improvement in the wear resistance. © 2011 Elsevier B.V.


Furlan J.,GIW Industries Inc. | Visintainer R.,GIW Industries Inc. | Sellgren A.,Lulea University of Technology
Canadian Journal of Chemical Engineering | Year: 2016

Recent loop testing performed at the GIW Hydraulic Lab[1,2] has provided pump performance data for two highly non-Newtonian slurries with significantly different characteristics: a high clay content slurry with minimal coarse solids; and a typical, low clay content, two-component tailings slurry. The importance of air removal in the sump and pipe loop was demonstrated using a simple, yet novel de-aeration system. In addition to the measurement of performance losses, determination of the upper limit of "pumpability" for these slurries relative to their concentration and associated yield stress was investigated. However, once the slurry was de-aerated, no limits could be found, other than those dictated by suction side losses (NPSHA) or excessive pipeline friction gradients, indicating that the only true limit in practice is one of system economics, i.e. pump operating and capital cost. Experimentally measured pump head and efficiency were compared against corresponding predictions from two different models: the Walker and Goulas technique[3] and the Graham et al. technique,[4] with special focus given to the dependence of the losses on pump rotary speed. © 2016 Canadian Society for Chemical Engineering.


Furlan J.M.,GIW Industries Inc. | Mundla V.,Case Western Reserve University | Kadambi J.,Case Western Reserve University | Hoyt N.,Case Western Reserve University | And 2 more authors.
Powder Technology | Year: 2012

The effects of solid particle concentration on hydraulic performance and wear need to be considered during the design of slurry transport equipment used in the petroleum and mining industries. The acoustic properties of slurry flows such as velocity, backscatter, and attenuation as a function of volume fraction of solid particles are examined in this study. An ultrasound A-mode imaging method is developed to obtain particle concentration in a flow of soda lime glass particles (diameter of 195. μm) and water slurry in a 0.0254. m diameter pipe. Based on the acoustic properties of the slurry, a technique is developed to measure local solid particle concentrations. The technique is used to obtain concentration profiles in homogeneous (vertical flow) and non-homogeneous (horizontal flow) slurry flows with solid particle concentrations ranging from 1 to 10% by volume using a window size of 0.159. cm. The profiles show average concentration within each window vs. distance from the transducer face. For horizontal flow, profiles are obtained for average flow velocities of 2.0, 3.0, and 3.5. m/s. The algorithm developed utilizes the power spectrum and attenuation measurements obtained from the homogeneous loop as calibration data in order to obtain concentration profiles in other (i.e. non-homogenous) flow regimes. A computational study using FLUENT is performed and a comparison is made with the experimental results. Reasonable agreement between the experimental and computational results is observed. The ultrasound technique has proven to be useful in characterizing slurry flows containing concentrations too high to be investigated using optical techniques. © 2011 Elsevier B.V.


Pagalthivarthi K.V.,GIW Industries Inc. | Furlan J.M.,GIW Industries Inc. | Visintainer R.J.,GIW Industries Inc.
ASME/JSME/KSME 2015 Joint Fluids Engineering Conference, AJKFluids 2015 | Year: 2015

Flow through centrifugal pump casing is highly complex in nature due to the complex geometry of the casing. While simplified two dimensional modeling of pump casing reveals the overall flow pattern and pressure distribution, a complete 3D model of pump casing is essential to fully capture the interaction of the primary main stream flow and the secondary flows especially in areas of heavy recirculation. This paper presents steady state finite element simulation of multi-size particulate slurry flow through three dimensional pump casing. The flow field and concentration distribution is presented for different cross-sectional planes. The multi-size particulate flow simulation results are compared with two mono-size particle simulations using (1) the concentration weighted mean diameter of the slurry and (b) the D50size of the slurry. Qualitative comparison is made with the wear rate predicted by the simulations and the field data. Simulations and field data show that at low flow rates, the side-wall gouging wear near the tongue region becomes significant. Copyright © 2015 by ASME.


Pagalthivarthi K.,GIW Industries Inc. | Visintainer R.,GIW Industries Inc.
Journal of Computational Multiphase Flows | Year: 2013

Multi-size particulate dense slurry flow through three-dimensional rectangular channel is modeled using penalty finite elements with 8-noded hexahedral elements. The methodology previously developed for two-dimensional channel is extended. The computed eddy viscosity of the pure carrier flow is modified to account for the presence of solid particles. Predictions from Spalart-Almaras and k-Ïμ turbulence models are compared to show consistency of trends in results. Results are also found to compare well with experimental results from the literature.


Taylor P.,GIW Industries Inc. | Tian H.,GIW Industries Inc.
Journal of Failure Analysis and Prevention | Year: 2016

An unusual high-temperature failure is presented involving the bearings and drive shaft of a centrifugal slurry pump. The unique characteristics of the failure are explored including localized heating and interactions between the ductile iron bearing collar and the shaft material. Maximum surface temperature of the shaft at the time of failure is estimated to be 2100–2300 °F. Partial melting of the ductile iron bearing collar and softening of the shaft appears to have resulted in both the inclusion of ductile iron in the shaft material in the molten state and a form of friction stir welding which joined the two components. Hardness values in excess of 900 Vickers were recorded around the material interface. It is theorized that rapid diffusion of carbon into the shaft material occurred during failure facilitated by mechanical mixing due to severe high-temperature deformation. Graphite nodularity and phase analysis of the ductile iron collar and an embedded ductile iron fragment were conducted by means of microscopy and image analysis. © 2016 ASM International


Taylor P.,GIW Industries Inc. | Tian H.,GIW Industries Inc.
Materials Science and Technology Conference and Exhibition 2015, MS and T 2015 | Year: 2015

An unusual high temperature failure is presented involving the bearings and drive shaft of a centrifugal slurry pump. The unique characteristics of the failure are explored including localized heating and interactions between the ductile iron bearing collar and the shaft material. Maximum surface temperature of the shaft at the time of failure is estimated to be 2100-2300°F. Partial melting of the ductile iron bearing collar and softening of the shaft appears to have resulted in a form of friction stir welding (FSW). Hardness values in excess of 900 Vickers were recorded around the material interface. It is theorized that rapid diffusion of carbon into the shaft material occurred during failure facilitated by mechanical mixing due to severe high temperature deformation. Graphite nodularity and phase analysis of the ductile iron collar and an embedded ductile iron fragment were conducted by means of microscopy and image analysis. © Copyright 2015 MS&T15.


Trademark
GIW Industries Inc. | Date: 2011-06-22

Wear resistant, metal claddingfor pumps, cyclones, pipelines and other solids handling equipment.


Trademark
GIW Industries Inc. | Date: 2014-02-11

Industrial castings, namely, white iron castings, corrosion-resistant alloys, heat-resistant alloys, nickel-based alloys, carbon steel, low-alloy steel, abrasion-resistant alloys. Pumps, namely, slurry pumps and dredge pumps. Urethanes; rubber pumps, shrouds and vanes. Design and fabrication of slurry pumps, dredge pumps and castings for industrial and/or commercial use.


Trademark
GIW Industries Inc. | Date: 2012-01-18

Wear resistant white iron for pumps, clycones, pipelines and other solids handling equipment.

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