Study on the Vibration Lamella Thickener and its Application in Mineral Processing Plant

2012 ◽  
Vol 215-216 ◽  
pp. 333-341 ◽  
Author(s):  
Xing Long Zhou ◽  
Zhe Yi Long ◽  
Wen Yuan Hu ◽  
Xiao Ming Zhang ◽  
Zhi Xin Shi ◽  
...  
Keyword(s):  
Mechanical Vibration ◽  
Research Progress ◽  
Stable Operation ◽  
Processing Plant ◽  
Inclined Plate ◽  
Plate Group ◽  
Group Module ◽  
New Type ◽  
Sloping Plate

The development status and research progress of inclined plate sedimentation equipment, as well as the research progress of how to prevent the blockage of sedimentation channel were discussed. The main disadvantages of traditional inclined plate thickener were analyzed. A kind of new type lamella thickener which could vibrate the inclined plate was introduced. The core technologies of the vibration lamella thickener are that the inclined plate sedimentation channels are integrated and modularized, the integral sloping plate group module are suspension supported by using springs and each module mounted an independent mechanical vibration excite. By implementing an intermittent high frequency weak vibration to the sloping plate group module, the regular automatic cleaning of the surface of inclined plate was carried out, which could prevent the fine materials adhesive to the oblique plate and guarantee the settlement channel is not blocked, so as to achieve the purpose of long-term stable operation of the equipment. Vibration lamella thickener has been used in many concentrators successfully, including the classification of feed pulp, desliming and thicken of middle materials, dewatering and thickening of concentrate and tailing, and paste discharge of tailing thicken at al.. It is highly valued from clients by their good application in practical production.

scholarly journals Current and New Approaches to Predict the Deflections of One-Way Flexural Members with a Focus on Composite Steel Deck Slabs Voided by Circular Tubes

Materials ◽  
2021 ◽  
Vol 14 (2) ◽  
pp. 421
Author(s):  
Chang-Hwan Lee ◽  
Iman Mansouri ◽  
Jaehoon Bae ◽  
Jaeho Ryu
Keyword(s):  
Structural Function ◽  
Flexural Members ◽  
Long Span ◽  
Deck Slabs ◽  
New Type ◽  
New Perspective ◽  
Flexural Tests ◽  
Prediction Approach ◽  
Steel Deck

A new type of composite voided slab, the TUBEDECK (TD), which utilizes the structural function of profiled steel decks, has recently been proposed. Previous studies have confirmed that the flexural strength of TD slabs can be calculated based on the full composite contribution of the steel deck, but for long-span flexural members, the deflection serviceability requirement is often dominant. Herein, we derived a novel deflection prediction approach using the results of flexural tests on slab specimens, focusing on TD slabs. First, deflection prediction based on modifications of the current code was proposed. Results revealed that TD slabs exhibited smaller long-term deflections and at least 10% longer maximum span lengths than solid slabs, indicating their greater efficiency. Second, a novel rational method was derived for predicting deflections without computing the effective moment of inertia. The ultimate deflections predicted by the proposed method correlated closely with the deflection under maximum bending moments. To calculate immediate deflections, variation functions for the concrete strain at the extreme compression fiber and neutral axis depth were assumed with predictions in good agreement with experiments. The proposed procedure has important implications in highlighting a new perspective on the deflection prediction of reinforced concrete and composite flexural members.

Experimental Study on the Drying Performance of the High Temperature Heat Pump Dryer

2012 ◽  
Vol 550-553 ◽  
pp. 3219-3223
Author(s):  
Xing Wang Zhu ◽  
Chun Xia Hu ◽  
Zhi Min Guo ◽  
Yu Gui Su
Keyword(s):  
High Temperature ◽  
Heat Pump ◽  
External Environment ◽  
Stable Operation ◽  
Obvious Effect ◽  
Electromagnetic Valve ◽  
Exhaust Temperature ◽  
Temperature Heat ◽  
High Temperature Heat Pump

In this paper，a high temperature heat-pump dryer and a corresponding semi-enclosed test drying room for using the dryer are built up respectively. While the average dry bulb of the external environment is 25°C and the relative humidity is 55%, the performance of the dryer is obtained when the dryer is running continuously for five hours. The results show that: the electromagnetic valve-capillary institution has an obvious effect on the lower the dryer exhaust temperature. It makes the suction temperature of compressor dropped 10 °C~15 °C, which can reduce the exhaust temperature and prevent compressor’s overheating. When the exhaust temperature keep at 100~110 °C, it can not only guarantee the temperature of wind coming from the dryer is high, but also can make sure the drying system’s long-term stable operation.

Solvent-Based Polymer Swelling Characterization for the Development of the Nano/Micro-Particle Polymer Composite MEMS Corrosion Sensor

2014 ◽  
Author(s):  
Feng Pan ◽  
Abdoul Kader Maiga ◽  
Po-Hao Adam Huang
Keyword(s):  
Reaction Products ◽  
Material Transport ◽  
Sensing Element ◽  
Micro Electro Mechanical Systems ◽  
Polymer Swelling ◽  
Corrosion Sensor ◽  
Mems Technology ◽  
New Type ◽  
Oxide Removal

The concept of using Micro-Electro-Mechanical Systems (MEMS) for in-situ corrosion sensing and for long-term applications has been proposed and is currently under development by our research lab. This is a new type of sensing using MEMS technology and, to the knowledge of our team, has not been explored previously. The MEMS corrosion sensor is based on the oxidation of metal nano/micro-particle embedded in elastomeric polymer to form a composite sensing element. The polymer controls the diffusion into and out of the sensor while the corrosion of the metal particles inhibits electrical conduction which is used as the detection signal. The work presented here is based on part of the methods developed for the removal of native and process-induced metal oxides. A major aspect is the study of the swelling dynamics of the polymer matrix (polydimethylsiloxane, PDMS) intended for enhancing material transport of etchants into and reaction products out of the composite during oxide removal. More specifically, the characterization of the swelling of copper particles-PDMS composite samples in liquid solvent baths is presented.

scholarly journals Catalytic Micro Gas Sensor with Excellent Homogeneous Temperature Distribution and Low Power Consumption for Long-Term Stable Operation

Proceedings ◽  
2018 ◽  
Vol 2 (13) ◽  
pp. 927 ◽  
Author(s):  
Anmona Shabnam Pranti ◽  
Daniel Loof ◽  
Sebastian Kunz ◽  
Marcus Bäumer ◽  
Walter Lang
Keyword(s):  
Temperature Distribution ◽  
Low Power ◽  
Gas Sensor ◽  
Gas Flow ◽  
Pt Nanoparticles ◽  
Stable Operation ◽  
Catalytic Layer ◽  
Micro Gas Sensor ◽  
Homogeneous Temperature

This paper presents a long-term stable thermoelectric micro gas sensor with ligand linked Pt nanoparticles as catalyst. The sensor design gives an excellent homogeneous temperature distribution over the catalytic layer, an important factor for long-term stability. The sensor consumes very low power, 18 mW at 100 °C heater temperature. Another thermoresistive sensor is also fabricated with same material for comparative analysis. The thermoelectric sensor gives better temperature homogeneity and consumes 23% less power than thermoresistive sensor for same average temperature on the membrane. The sensor shows linear characteristics with temperature change and has significantly high Seebeck coefficient of 6.5 mV/K. The output of the sensor remains completely constant under 15,000 ppm continuous H2 gas flow for 24 h. No degradation of sensor signal for 24 h indicates no deactivation of catalytic layer over the time. The sensor is tested with 3 different amount of catalyst at 2 different operating temperatures under 6000 ppm and 15,000 ppm continuous H2 gas flow for 4 h. Sensor output is completely stable for 3 different amount of catalyst.

scholarly journals Research Status and Development Trend of Magnetic Fluid Acceleration Sensors

2021 ◽  
pp. 10-15
Author(s):  
Mu Xueyu ◽  
Yang Shaojie ◽  
Kong Xiangdong
Keyword(s):  
General Structure ◽  
Inertial Mass ◽  
Development Trend ◽  
Research Progress ◽  
Acceleration Sensor ◽  
Magnetic Liquid ◽  
Existing Problems ◽  
Acceleration Sensors ◽  
New Type ◽  
The Difference

As a new type of accelerometer, in recent years, the magnetic liquid acceleration sensor has attracted widespread attention worldwide, and related research results have also continued to emerge. This article mainly introduces the theoretical basis and general structure of the magnetic liquid acceleration sensor, and according to the difference of inertial mass, briefly describes the research progress of the magnetic liquid acceleration sensor by national and foreign scholars in recent years and some in existing problems. Finally, suggestions and prospects for the future development trend of the magnetic liquid acceleration sensor are given.

scholarly journals Research Progress of Carrier-Free Antitumor Nanoparticles Based on Phytochemicals

2021 ◽  
Vol 9 ◽  
Author(s):  
Siliang Jiang ◽  
Yu Fu ◽  
Xinyang Zhang ◽  
Tong Yu ◽  
Bowen Lu ◽  
...  
Keyword(s):  
Public Health ◽  
Research Progress ◽  
Public Health Issue ◽  
Lifestyle Behaviors ◽  
Increase Cancer Risk ◽  
Traditional Treatment ◽  
Acquired Drug Resistance ◽  
Nanodrug Delivery ◽  
Carrier Free

Cancer is a major worldwide public health issue, responsible for millions of deaths every year. Cancer cases and deaths are expected to increase rapidly with population growth, age, and lifestyle behaviors that increase cancer risk. Long-term chemotherapy results in acquired drug resistance. Traditional treatment methods have limitations and cannot effectively treat distal metastatic cancers. Application of nanocarriers in multi-chemotherapy must be promoted. With research progress, the shortcomings of traditional nanocarriers have gradually become evident. Carrier-free nanodrugs with desirable bioactivity have attracted considerable attention. In this review, we provide an overview of recent reports on several carrier-free nanodrug delivery systems based on phytochemicals. This review focuses on the advantages of carrier-free nanodrugs, and provides new insights for establishment of ideal cancer treatment nanosystems.

Thin-Film High-Barrier Technology for New Type Packaging Material

2010 ◽  
Vol 113-116 ◽  
pp. 2333-2336 ◽  
Author(s):  
Chun Wei Li ◽  
Xue Song Jiang ◽  
Qun Li Zhang ◽  
Shu Yan Xu ◽  
Gui Ying Wang
Keyword(s):  
Thin Film ◽  
Food Packaging ◽  
Substrate Surface ◽  
Aluminum Foil ◽  
Packaging Material ◽  
Research Progress ◽  
Current Status ◽  
High Polymer ◽  
New Type ◽  
Reactive Gases

Food Packaging material requires an excellent barrier ability to humidity and oxygen.SiOx barrier thin film deposited on high polymer substrate can compare beauty with aluminum foil in the barrier quality,even more SiOx barrier thin film is obviously allowing microwave permeating directly and it also provide a chance for merchant to vision their production in shelf life.SiOx film as barrier packaging material is becoming a high light.The current status and research progress of new type high barrier thin film packaging material were overviewed and production technology was introduced. The various influencing factors were discussed, including background vacuum, reactive gases, and pretreatment of the substrate surface and properties.

Effect of reintroduced manual mowing on biodiversity in abandoned fen meadows

Biologia ◽  
2015 ◽  
Vol 70 (1) ◽  
Author(s):  
Jakub Horak ◽  
Lenka Safarova
Keyword(s):  
Restoration Ecology ◽  
Conservation Value ◽  
High Conservation ◽  
New Type ◽  
Surrounding Landscape ◽  
Flower Visiting ◽  
Short Time ◽  
Positive Effect ◽  
Insect Group

AbstractWetlands have recently become of high environmental interest. The restoration effects on habitats like fens are one of the main topics of recent restoration ecology, especially due to their interconnection with other ecosystems. We studied the manual mowing effect on abandoned fen using the response of three study taxa: diurnal butterflies, flower-visiting beetles and vascular plants. Our results showed that butterflies seems to be quickly-responding indicator taxon for evaluation and that restored management had a positive effect on both species richness and composition of this insect group. The results indicated that the manual mowing effect could be rapid. In comparison with the surrounding landscape, we found that: (i) the manually mowed site was most similar to strictly protected area, (ii) some species of high conservation value could reach higher abundance in restored than protected site, and (iii) manual mowing could bring a new type of habitat (i.e., spatial heterogeneity) compared to the other management types (abandonment, conservation and agri-environmental mowing). The main implication seems to be optimistic for practice: The manual mowing of long-term abandoned fen is leading to the creation of habitat with high conservation value in a relatively short time.

Effect of on-farm interventions in the aftermath of an outbreak of hypervirulent verocytotoxin-producing Escherichia coli O157:H7 in Sweden

2018 ◽  
Vol 182 (18) ◽  
pp. 516-516 ◽  
Author(s):  
Lena-Mari Tamminen ◽  
Helena Fransson ◽  
Madeleine Tråvén ◽  
Anna Aspán ◽  
Stefan Alenius ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Control Measures ◽  
Processing Plant ◽  
Escherichia Coli O157 ◽  
Meat Processing ◽  
Cattle Farm ◽  
Human Infections ◽  
On Farm

In 2007, human infections with a hypervirulent strain of verocytotoxin-producing Escherichia coli O157:H7 increased in Sweden and especially in the Halland County. A connection between the cases and a local beef cattle farm with an on-farm abattoir and meat processing plant was established. In this observational study the control measures implemented on the infected farm and the dynamics of infection in the herd are described. In May 2008, when measures were initiated and animals put to pasture, the prevalence of positive individuals was 40 per cent and 18 carcasses out of 24 slaughtered animals were contaminated. During summer the monthly prevalence of positive carcasses varied between 8 and 41 per cent and at turning-in 22 out of 258 individually sampled animals were shedding the pathogen. After January 2009 no positive carcasses were found at slaughter and follow-up samplings of environment and individuals remained negative until the study period ended in May 2010. The results indicate that on-farm measures have potential to reduce the prevalence of the pathogen in a long-term perspective. However, as self-clearance cannot be excluded the effectiveness of the suggested measures needs to be confirmed.

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