Dec 15, 2018· Many individual snap konimeter samples taken at the Colonial Mill in the last 5 years of operation recorded as 1000+ ppcc, and notation of considerable quantities of asbestos fibres. In 1960 comparative dust sampling was conducted between a midget impinger (10 min samples) and a konimeter (4 snap shots during the 10 min).
Dust Control in the. Y~ne. Sampling and Counting Procedure ... on human beings of dust in mine air is well-known. It is the. duty. of engineers, therefore, to take measures to elimi- ... three types of instruments are commonly used in the mining industry, viz. Konimeter, Widget Impinger., and the rrhermal Precipitator*. *For.
1. Ann Occup Hyg. 1977 Dec;20(4):333-44. Simultaneous airborne dust samples with konimeter, thermal precipitator and dosimeter in asbestos mines.
The sampler followed a route to, and a criss-cross through, the zone, keeping on the move, more or less continuously, without following the same route twice. Wherever people were encountered, air was sampled for dust counts, using a konimeter, at the rate of roughly one konimeter spot per two persons, whether they were at work, resting or walking.
For diatomaceous earth industry could therefore be also epidemiological purposes, not the quartz content of the Journal of Exposure Science and Environmental Epidemiology (2008) 18(5) 453 Dahmann et al. Silica dust assessment in epidemiological studies parent material but of the dust samples is the relevant Sampling of Respirable Dust information.
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 …
The sampler followed a route to, and a criss-cross through, the zone, keeping on the move, more or less continuously, without fol-lowing the same route twice. Wherever people were encountered, air was sampled for dust counts, using a konimeter, at the rate of roughly one konimeter spot per two persons, whether they were at work, resting or walking.
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. See Also: dust sampling.
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 …
Mar 03, 1987· 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 were used: the Florida State University streaker sampler, the single orifice cascade impactor and the stacked filter unit (SFU).
In the first section of this paper, dust counts obtained with a konimeter at 10-second intervals over a period of 30 minutes or longer are used for an elementary statistical analysis to determine how accurately the mean of any stated number of ...
Medical definition of konimeter: a device for estimating the dust content of air (as in a mine or a cement mill).
The nylon cyclone is shown to be an acceptable respirable dust sampler for the Ontario hard-rock mining environment. ... In the uranium mine, the Witwatersrand konimeter gave a 25% lower ...
Supervised soil and groundwater sampling at leaking underground storage tank (LUST) sites. ... underground miner at East Mine and trend analysis of quarterly konimeter dust …
The inhalable dust sampler (IOM) collects a larger size distribution and corresponds to the ACGIH sampling criteria for inhalable particulate mass. In this experiment you will take simultaneous samples with the cascade impactor, the respirable dust filter sampling train, the inhalable sampler and the total dust sampling train in order to compare and interpret their results.
This is a motor-driven konimeter which takes 30 separate dust samples at regular intervals, which can be varied from 4 to 60 minutes, giving total sampling times between 2 and 30 hours. The dust spots are arranged on the circumference of a glass plate. The apparatus is said to be an improvement on the recording konimeter made by Zeiss, Jena, which produces a continuous dust trace.
Quantitating the efficiency of the coal mine personal respirable dust sampler for sampling oxide fumes. Tomb TF, Beckert AJ, Treaftis HN. Am Ind Hyg Assoc J, 37(8):459-463, 01 Aug 1976 Cited by: 0 …
Nov 01, 1987· In the uranium mine, the Witwatersrand konimeter gave a 25% lower measurement of dust concentration than the Gathercole. The pre-impactor reduced the particle concentration measurement of the Witwatersrand konimeter by about 4%, but the result was not statistically significant. The Devers and Gathercole konimeters gave similar measurements.
DEPARTMENT OF MINING ENGINEERING M.TECH (MINE PLANNING) PTPG SYLLABUS 1 ... Konimeter, gravimetric dust sampler and personal dust sampler. Title: Microsoft Word - M. Tech _Mine Planning_ Syllabus Author: KUNL Created Date: 3/30/2021 4:53:08 PM ...
operations in the mines were made using the konimeter. GCA respirable dust monitoring The survey of environmental conditions in 12 operating mines was made in 1976. This was a special sunzey, where more than 400 operations were sampled with both the GCA direct reading gravimetric dust sampler and the konimeter.
Konimeter Dust Sampler Mining. FOB Reference Price: Get Latest Price. 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 ...
air-sampling techniques for dust analysis used in his time, namely the sugar tube method and the konimeter. KEYWORDS History of chemistry, mine air analysis, dust-sampling in the early 1900s. 1. Introduction James Moir (1874–1929) played a leading role in the field of chemistry in South Africa in the early 1900s. His activities as a
konimeter (Zeiss, 1950), shown in Fig. 3, could collect 30 dust samples on a single glass disk, which was rotated to permit the immcdiate examination of the spots under the built-in microscope. Cascade Impactors An important improvement in the field of dust sampling was provided by an instrument
Sep 28, 2010· mining • Sampling methods to quantify dust sources . Dust Standards for Metal/Nonmetal Mining (Federal Mine Safety and Health Act of 1977) 10.0 mg/m 3 total airborne dust . If silica > 1%: respirable standard = 10 / (% silica + 2) Gravimetric Dust Sampler
Reported dust exposure measurements at the two mines were of a cross-sectional design. At each mine, bulk and personal respirable dust samples were collected at scheduled areas. Scheduled areas are production areas of the mine where mining regulations of the Zambian mining regulatory authorities apply. In these areas, the main production
Definition of photometric method. A dust-sampling method in which samples of dust are collected on filter paper and then placed in a photometer. The instrument shows the intensity of a beam of light after it has passed through the paper, and the fall in intensity is a direct measure of the dust concentration.
Mining 51 Copper 51 Lead 51 Zinc 51 Coal 52 Potteries 52 Rock drilling, blasting, excavating 52 Sand blasting 53 Sandstone quarrying 53 Slate milling 53 Spraycoating 53 Talc mining 54 Trap rock quarrying 54 Chapter V—Prevention ofSilicosis 55 Analysisofdustfor freesilica 55 Dust sampling methods 55 Konimeter 50. Table of Contents 7 PAGE ...
Africa since the 1930s, dust was collected with a konimeter (Le Roux, 1970; Cherrie and Aitken, 1999). A small volume of air (e.g., 5 cm. 3. captured in less than a second) was collected (impacted) onto a small area of a glass slide coated with adhesive. Total dust particles were counted and expressed as dust particles per cubic centimeter.
Environmental Laboratory established in the department is all in one facility covering all aspects mine environment (air, water), underground mine ventilation and climate engineering . It is a state of the art laboratory with advanced equipment's like X-ray Fluorescence Spectrometer (XRF), Digital Gas Chromatograph, Gravimetric dust sampler ...
Dec 01, 1977· Simultaneous airborne dust samples were taken with three types of instruments: konimeter, thermal precipitator and dosimeter (personal sampler with membrane filter) in eight asbestos mines producing four types of asbestos (Cape crocidolite, Transvaal crocidolite, amosite and …
13. Konimeter/ Personnel Dust Sampler Complete with rotometer (can be used as gravimetric dust sampler) DGMS Approved, along with charger. 14. Stone dust barrier study model Size: 64 cm × 46 cm × height 20 cm approx. 15. Booster fan 16. Sirocco fan 17. Airlock for up cast shaft MINE MACHINARY LAB (5th SEM, Mining) SL. NO SPECIFICATION OF ITEM
.2 Dust measurement.h .3 The konimster. n.4 General correlations between konimeter counts and silicouis. k The Main Investigation. 3.1 Dust counts at strategic points..2 Variation of counts with calendar years. *.3 Clawaifioution of mine workers into main classes..4 Duration of underground rbii'ts of main classes of workers.