Study on Parameters of Slurry Pipeline Transportation Technology in Grade

2014 ◽  
Vol 687-691 ◽  
pp. 556-559
Author(s):  
Guang Yue Pu ◽  
Yong Xia Bu ◽  
Chun Lei Pan ◽  
Hong Wei Liu
Keyword(s):  
Iron Ore ◽  
Hydraulic Characteristics ◽  
Pipeline Transportation ◽  
Two Phase ◽  
Mining Areas ◽  
Turbulent Transition ◽  
Solid Liquid ◽  
Minimum Operating ◽  
Iron Ore Concentrate

In generally, there are multiple factories. According to mining areas, it supplies different quality iron ore concentrate. And according to the unique requirements of owners, different grades concentrate cannot be confused. Therefore, the grade of slurry pipeline transportation is needed to be used. When in the study of grade transmission, we must focus on Hydraulic characteristics of solid-liquid two-phase for different quality of iron ore concentrate. Slurry concentration and Critical velocity of flow is especially important. Research shows that the deposition rate of laminar or turbulent transition velocity is higher than the occasion when the slurry has concentration, so the minimum operating speed is controlled by sedimentation; the concentration lower limit is 62%. If the concentration is over 68%, the yield stress of slurry will increase, and the pipeline pressure will drop, which is very sensitive to slight changes in concentration. Therefore, the solid weight concentration range is 62% to 68%,as the selection range of design.

State Modeling and Verification of Resistance Loss along the Long-Range Solid-Liquid Two-Phase Pipeline

2012 ◽  
Vol 461 ◽  
pp. 854-859
Author(s):  
Jian De Wu ◽  
Xu Yi Yuan ◽  
Yu Gang Fan ◽  
Xiao Dong Wang
Keyword(s):  
Complex Terrain ◽  
Iron Ore ◽  
Production Data ◽  
Mechanism Analysis ◽  
Pipeline Transportation ◽  
Two Phase ◽  
Production Practice ◽  
Engineering Significance ◽  
Resistance Loss ◽  
Solid Liquid

This paper studies the content from the urgent needs of production practice, it will take mechanism analysis to be a breakthrough to solve the problem of the resistance loss of complex terrain of iron ore slurry transportation. Through the analysis of past formula of pipeline resistance loss, combined with the actual characteristics of Dahongshan pipeline, correction formula of pipeline transportation resistance loss is derived. And we use the actual production data to prove the accuracy of the formula, the error is under control within 10%. The formula ignores energy loss due to the movement of particles, so the bias between the calculated and measured values still exists. But the formula still has important engineering significance.

scholarly journals Iron-Ore Sintering Process Optimization / Optymalizacja Procesu Aglomeracji Rudy Żelaza

2015 ◽  
Vol 60 (4) ◽  
pp. 2895-2900 ◽  
Author(s):  
M. Fröhlichová ◽  
D. Ivanišin ◽  
A. Mašlejová ◽  
R. Findorák ◽  
J. Legemza
Keyword(s):  
Iron Content ◽  
Iron Ore ◽  
Raw Materials ◽  
Size Composition ◽  
Sintering Process ◽  
Iron Ore Sintering ◽  
Iron Ore Sinter ◽  
A Charge ◽  
Iron Ore Concentrate

The work deals with examination of the influence of the ratio between iron ore concentrate and iron ore on quality of produced iron ore sinter. One of the possibilities to increase iron content in sinter is the modification of raw materials ratio, when iron ore materials are added into sintering mixture. If the ratio is in favor of iron ore sinter, iron content in resulting sintering mixture will be lower. If the ratio is in favor of iron ore concentrate and recycled materials, which is more finegrained, a proportion of a fraction under 0.5 mm will increase, charge permeability property will be reduced, sintering band performance will decrease and an occurrence of solid particulate matter in product of sintering process will rise. The sintering mixture permeability can be optimized by increase of fuel content in charge or increase of sinter charge moisture. A change in ratio between concentrate and iron ore has been experimentally studied. An influence of sintering mixture grain size composition, a charge grains shape on quality and phase composition on quality of the produced iron sinter has been studied.

The role of normal and activated bentonite on the pelletization of barite iron ore concentrate and the quality of pellets

2003 ◽  
Vol 130 (1-3) ◽  
pp. 277-282 ◽  
Author(s):  
O.A Mohamed ◽  
M.E.H Shalabi ◽  
N.A El-Hussiny ◽  
M.H Khedr ◽  
F Mostafa
Keyword(s):  
Iron Ore ◽  
Activated Bentonite ◽  
Iron Ore Concentrate

scholarly journals Mechanism Research and Discussion of the Quality of Precision Machining of a Fifth-order Variable-diameter Pipe Using Abrasive Flow

2020 ◽  
Vol 66 (6) ◽  
pp. 358-374
Author(s):  
Junye Li ◽  
Lixiong Wang ◽  
Hengfu Zhang ◽  
Jinglei Hu ◽  
Xinming Zhang ◽  
...  
Keyword(s):  
Surface Quality ◽  
Incident Angle ◽  
Precision Machining ◽  
Two Phase ◽  
Variable Diameter ◽  
Diameter Pipe ◽  
Order Variable ◽  
Solid Liquid ◽  
Fifth Order

The solid-liquid two-phase abrasive flow precision machining technology is widely used in aerospace, precision machinery, the automotive industry and other fields, and is an advanced manufacturing technology that effectively improves the inner surface quality of workpieces. In this paper, the fifth-order variable-diameter pipe parts are researched. By discussing the collision between the abrasive particles and the wall surface, it is revealed that the material removal of the workpiece is caused by plastic deformation, and the mechanism of precision machining of the abrasive flow is clarified. Through numerical analysis and experimental research, it is found that the incident angle can affect the precision machining quality of the abrasive flow. When the inlet velocity of the abrasive flow is 45 m/s and the incident angle is 15°, the fifth-order variable-diameter pipe can obtain the best surface quality. Abrasive flow machining improves the surface quality of small holes better than that of large holes. To obtain uniform surface quality, it is necessary to use two-way machining to perform abrasive flow machining. The surface texture of the fifth-order variable-diameter pipe workpiece after precision machining by abrasive flow becomes clear and smooth, and the surface quality is significantly improved. The research results can provide theoretical guidance and technical support for the popularization and application of solid-liquid two-phase abrasive flow precision machining technology, with significant academic value and application value.

Hydraulic characteristics of molten salt pump transporting solid-liquid two-phase medium

2017 ◽  
Vol 324 ◽  
pp. 220-230 ◽  
Author(s):  
Wenjie Cheng ◽  
Boqin Gu ◽  
Chunlei Shao ◽  
Yi Wang
Keyword(s):  
Molten Salt ◽  
Hydraulic Characteristics ◽  
Two Phase ◽  
Phase Medium ◽  
Solid Liquid

Intelligent Plant Design of Complex Landform Long Distance Pipeline Transport of Iron Concentrate

2011 ◽  
Vol 48-49 ◽  
pp. 632-636 ◽  
Author(s):  
Jian De Wu ◽  
Hua Wang ◽  
Yu Gang Fan ◽  
Xiao Dong Wang
Keyword(s):  
Production Efficiency ◽  
Plant Design ◽  
Pipeline Transportation ◽  
Time Data ◽  
Long Distance ◽  
Two Phase ◽  
Management Level ◽  
Iron Concentrate ◽  
Solid Liquid ◽  
Improve Production Efficiency

Under the premise of transportation inconvenient, reducing pollution and environmental protection, iron concentrate pipeline transportation developing rapidly. However, due to pipeline related to fluid mechanics, solid-liquid two-phase flow, rheology, and other subjects, many scientific problems are still not resolved. Because of these problems, a further study on running control, security management, and optimize operations of pipeline transportation are needed, ensuring pipeline security, stability and efficient running. Intelligent plant design of pipeline transportation presents in this paper, taking intelligent data integration technologies, holding real-time data, running conditions of pipeline transportation and equipment, devices modeling integrated into a platform, achieving optimal scheduling, the goal of intelligent scheduling, as a result it can improve the management level, achieve energy conservation, improve production efficiency.

scholarly journals Numerical Thermodynamic Analysis of Two-Phase Solid-Liquid Abrasive Flow Polishing in U-Type Tube

2014 ◽  
Vol 6 ◽  
pp. 921831 ◽  
Author(s):  
Junye Li ◽  
Zhaojun Yang ◽  
Weina Liu ◽  
Weihua Cai ◽  
Zemin Qiao
Keyword(s):  
Kinetic Energy ◽  
Turbulent Kinetic Energy ◽  
Dynamic Pressure ◽  
Turbulent Viscosity ◽  
Internal Surface ◽  
Two Phase ◽  
Solid Liquid ◽  
Abrasive Flow Polishing ◽  
Type Tube

U-type tubes are widely used in military and civilian fields and the quality of the internal surface of their channel often determines the merits and performance of a machine in which they are incorporated. Abrasive flow polishing is an effective method for improving the channel surface quality of a U-type tube. Using the results of a numerical analysis of the thermodynamic energy balance equation of a two-phase solid-liquid flow, we carried out numerical simulations of the heat transfer and surface processing characteristics of a two-phase solid-liquid abrasive flow polishing of a U-type tube. The distribution cloud of the changes in the inlet turbulent kinetic energy, turbulence intensity, turbulent viscosity, and dynamic pressure near the wall of the tube were obtained. The relationships between the temperature and the turbulent kinetic energy, between the turbulent kinetic energy and the velocity, and between the temperature and the processing velocity were also determined to develop a theoretical basis for controlling the quality of abrasive flow polishing.

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