The sampler was tested with microbeads, dust, and Escherichia coli, and the sampling efficiency was found to be 28.04% for the wet cyclone air sampler and 87.68% for the DC impedance sampler, with an overall efficiency of 24.59%.
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Nuclear Instruments and Methods in Physics Research B22 (1987) 325-330 North-Holland, Amsterdam 325 PIXE CHARACTERIZATION OF AIRBORNE DUST IN THE MINING ENVIRONMENT H.J. ANNEGARN*, A. ZUCCHIATTI** and J.P.F. SELLSCHOP Wits-CSIR Schonland Research Center for Nuclear Sciences, University …
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The purpose of this project was to apply PIXE analytical techniques to the characterization of airborne dust in the underground gold mining environment.Three particle samplers …
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Mar 16, 2020· konimeter dust sampler mining; Konimeter Article about konimeter by The Free Dictionary. An air-sampling device used to measure dust as in a cement mill or a mine a measured volume of air drawn through a jet impacts on a glycerin-jelly-coated glass surface the particles are counted with a .
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Definition of konimeter. Apparatus used to measure dust in mine atmosphere. A measured volume of air is drawn through a jet so as to impinge on a glass surface coated with glycerin jelly. The adherent dust is then examined and the particles are counted under the microscope. Also called Zeiss konimeter.
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Most dust measurements are made for the first of these reasons -to evaluate dust hazards so that they may be controlled. For this purpose, four quite different assessment techniques have been in widespread use for many years. ... One of these is based on the konimeter, an instrument familiar to most .Canadian mining men; a second on the ...
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Personal dust monitor (PDM) allows real-time measuring dust. In these systems, there is a dust sampler and a cap lamp. The system has an exchangeable filter cartridge mounted on the end of the tapered element collects particles as a sample stream flows through a hollow tube. The tapered element oscillates at a frequency that
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Simultaneous airborne dust samples with konimeter, thermal precipitator and dosimeter in asbestos mines Ann Occup Hyg. 1977 Dec;20(4):333-44. doi: 10.1093/annhyg/20.4.333. Authors R S du Toit, T ... Mining* Occupational Medicine Substances Air Pollutants ...
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Describes methods of dust-sampling such as weighing the dust caught on cotton-wool, the sugar tube, konimeter, circular konimeter and the thermal precipitator. Covers the work of mine dust inspectors, the Miners' Phthisis Prevention Committee and the Chamber of Mines Dust Department.
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century with initial dust sampling techniques employing the konimeter, the use of the real-time Hund Tyndallometer, and later the introduction of gravimetric sampling in the mid-1990s, despite ... flow rate is 2.2 L/min (Kenny, Baldwin and Maynard, 1998). Currently, mine dust sampler pumps draw 2.2 L/min of air through a mini-cyclone, which ...
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Learn how to use the konimeter, a device that collects dust from a small volume of air by impingement on a glass plate, for occupational safety and health purposes. The web …
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Gravimetric Dust Sampler • Provides time-weighted-average respirable dust concentration • Dorr-Oliver cyclone separates respirable and oversize dust • Pump …
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The results quoted show that there is no constant factor connecting the dust counts, the ratio of konimeter count to thermal precipitator count varying from O�ll to 3�82, The dependence of this ratio on the collecting efficiency of the konimeter, on the effect of acid treatment, and on the method of counting the samples is discussed.
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In China, during 1988–1989, airborne dust samples were collected for conversion factors using US 10-mm nylon cyclone, multistage cassette impactor (used in USA), and Chinese total dust sampler with parallel sampling in the industries (Wu et al., 1992), where an epidemiological cohort study was conducted. The conversion factor is …
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Describes methods of dust-sampling such as weighing the dust caught on cotton-wool, the sugar tube, konimeter, circular konimeter and the thermal precipitator. Covers the work of mine dust inspectors, the Miners' Phthisis Prevention Committee and the Chamber of Mines Dust Department.
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MINE HAZARD & SAFETY LAB SL. NO NAME OF EXPERIMENT PHOTOGRAPHS LIST OF EQUIPMENTS 1 Estimation of CH 4 in air sample using ... 7 Study & uses of Konimeter. 8 Sampling of dust by gravimetric dust sampler. 9 Study of Rescue Apparatus FULL FACE MASK FIRE RESCUE MASK BREATHING APPARATUS
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DEPARTMENT OF MINING ENGINEERING DEMONSTRATION PLAN Discipline: ... Group2(3p) Study & uses of Konimeter. 8th Group1/3p) EXPT-8-RECORD EVALUATION/SESSIONAL/VIVA VOCE Group2(3p) EXPT-8-RECORD EVALUATION/SESSIONAL/VIVA VOCE Group1(3p) Sampling of dust by gravimetric …
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The "miner" was equipped with a person-carried respirable and an inhalable sampler. A static measurement site was then erected at about 10–20 m downstream of the mining (e.g., drilling) site. ... [Konimeter Modell 10, VEB Carl-Zeiss (TGL 22311/01 1977; TGL 109–7014 1967)], ... respectively. As the general dust load of the mine air ...
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Correlation of dust-count results by Zeiss konimeter and midget i.pdf - Free ebook download as PDF File (.pdf), Text File (.txt) or read book online for free. Scribd is the world's largest social reading and publishing site.
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Semantic Scholar extracted view of "An Automatic Dust Sampler based on the Konimeter Principle." by J. Schedling. Skip to search form Skip to main content Skip to account menu. Semantic Scholar's Logo. Search 218,872,084 papers from all fields of science. Search.
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Download scientific diagram | 2 A schematic diagram of a konimeter dust sampler (copyright Cleaver-Hume Press Limited) from publication: MONITORING FOR SAFETY AND HEALTH | | ResearchGate, the ...
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respirable dust concentration indicated by a sampler that has an aero-dynamic size selector. ... L. C. Richards, W. Stefanich, T. S. Cochrane, Program Coordinator, Mining Research Centre, Mines Branch, Department of Energy, Mines and Resources. ... The Effect of Heat Treatment and Acid Wash on Konimeter Dust Estimates 3-. 16 …
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Currently South African coal mines must perform two types of dust sampling. In terms of the DME guideline for the assessment of personal exposure to airborne pollutants …
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A device for measuring airborne dust concentration in which samples are obtained by sucking.... Click for English pronunciations, examples sentences, video.
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a device for estimating the dust content of air (as in a mine or a cement mill)… See the full definition
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The current personal dust sampler used to measure exposure to coal mine dust uses a person-wearable pump, a cyclone that separates dust that can enter the inner lung, and a filter to collect dust that is then weighed [MSHA 1989]. Knowing the volume of air sampled and the mass of dust collected, a concentration is cal-culated.
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The measurement of dust concentration in Ontario mines since 1926 has been accomplished by konimetry, based on South African experience and methods. The introduction of a voluntary program of semi-annual surveys of air conditions at all operations throughout Ontario mines created a need for an instrument that would assess …
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Simultaneous airborne dust samples were taken with five types of instrument, namely, konimeter, thermal precipitator, membrane filter, tyndallometer and VC 25 gravimetric sampler, on the surface and underground at two types of asbestos mine, producing amosite and Cape crocidolite respectively.
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Simultaneous airborne dust samples were taken with five types of instrument, namely, konimeter, thermal precipitator, membrane filter, tyndallometer and VC 25 …
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This is a Carl Zeiss konimeter in the collection of an instrument collector in Catalonia. A konimeter is an instrument for measuring the dust content of a sample of air. A measured volume of air is drawn through a jet, to impinge on a surface coated with a glycerin jelly. The dust adheres to the surface and the particles are counted under a ...
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Major hazards in an underground coal mine include methane and coal dust explosions and personal exposure to dust. Based on the first ever recorded coal mine explosion in Southern Africa in Natal in 1891, it can be inferred that underground coal mines have been operational for over 125 years [1].Considering where the global coal mining …
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konimeter dust sampler mining – Grinding Mill China. Limitations to the Use of the Konimeter CAB Direct. The konimeter has been used for dust investigations in British mines, and is still being used, Results have .....
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Describes methods of dust-sampling such as weighing the dust caught on cotton-wool, the sugar tube, konimeter, circular konimeter and the thermal precipitator. Covers the work …
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"Dust samplers are based on different principles. The konimeter is based on the number of particles counted; mining applications are based on routine sampling; and the photometrical evaluation of samples is used after the pre-separation of particles above 5 micron by the mining konimeter. In special cases, the Draeger sampler is used for …
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Konimeter Dust Sampler Mining exarteu During earlier investigations in coal mines the author and his colleagues observed that there were limitations to the use Of the konimeter for sampling airborne coal dust The konimeter has been used for dust investigations in British konimeter (1927) the Owens jet sampler (1923) and others 35000 miners ...
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The Hill and Kotzé units were developed for testing air scrubbers and dust in mining atmospheres, respectively. In 1917, ... and strapped to a workers chest to serve as a personal dust sampler ... The developments of the Hill dust counter, the Kotzé konimeter, the Owens' jet dust counter, and the Greenburg-Smith impinger in the early …
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