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NIR method development | NIR Calibration Model
Based on this, we have developed a complete technology platform (Time to Market) that covers the entire process from sending NIR + Lab data, to NIR Calibration as a Service, from online purchase of calibrations, to NIR Predictor software that directly evaluates newly measured NIR data locally and generates result reports.
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Effects of Prenatal Exposure to Coal-Burning Pollutants on Children's ...
The method complies with U.S. EPA method 7473. A reference standard, BCR 40 (mercury concentration, 0.35 ± 0.06 μg/g), which was developed by the Commission of the European Community (2008), was used to ensure the validity of the method. As required by the method, the first working curve range set by the instrument was used for calibration.
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A new distance correction method for sulfur analysis in coal using ...
When X-ray fluorescence (XRF) technology is used to measure the sulfur concentration in coal online, the measurement accuracy is affected by the coal's uneven surface and the particle size. In order to improve the accuracy of sulfur concentration measurement, an online measurement system, consisting of a portable X-ray fluorescence instrument and an auxiliary distance correction module, was developed in this paper.
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Review of Horizontal Surface Movements Due to Longwall Coal Mining ...
statistical methods are often limited in use to locations where the mining geometry and overburden lithology are similar to the mining areas from which the monitoring data were collected. Research is currently being undertaken to improve the predictive methods for horizontal movement and strain at the surface due to longwall coal mining.
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Calibration of a computerized SEM-EDS system for its use in the ...
The specific goal was the development of procedures to calibrate the system components involved in the collection of x-ray intensities, and of software to collect and process, under controlled conditions, the information required to calculate the average composition in the sample volume excited by the electron beam.
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ISO - ISO/IEC 17025 — Testing and calibration laboratories
ISO/IEC 17025 is useful for any organization that performs testing, sampling or calibration and wants reliable results. This includes all types of laboratories, whether they be owned and operated by government, industry or, in fact, any other organization. The standard is also useful to universities, research centres, governments, regulators ...
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US20140238906A1 - Automated system for coal spiral - Google
An apparatus and method for sensor and control system, which automatically adjusts a product splitter position of a full-scale spiral. An electrical conductivity-based automation system is described and claimed herein and has been successfully developed and demonstrated as illustrated herein. The system includes a sensor and a microprocessor based and controlled servo or gear motor that is ...
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Coal drying technology | Triple Innovation
Ahrko Systems has developed a revolutionary low cost method to dry brown coals, mineral sands and ores. Background Coal energy generation requires wet coals like brown coals to be dried before use. Brown coal is a soft material that has a much higher moisture content than black coal. High moisture content increases the energy content
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Online analysis and coal-fired power plants - ICSC
The coal-based, power generation process has many stages that require data monitoring and analysis. Figure 1 shows a layout of a coal-fired power plant and Table 1 lists the various stages in such a facility. In this report, online analysers used in stages 1 to 6 will be discussed. Continuous coal-flow measurement and control application (stage ...
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Online X-ray Elemental Analysis of Coal and Bulky Minerals
Indutech started in 1997 to develop an online coal analyzer based on the X-ray fluorescence (XRF) technology. The main topic was in the beginning to determine the ash - and sulfur content of coal. At that time nuclear methods based on the dependence of the absorption coefficient of soft gamma rays were mainly used for ash determination.
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Field Calibration of DP Flowmeters: Best Practices
A common method to verify that a DP transmitter is operating in the square-root mode is to look for a 50% output (12 mA) when the input pressure is 25% of range, using the relationship shown here: √0.25 (input) = 0.50 (output) -or- 0.25 (input) = 0.50 2 (output)
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Determination of polycyclic aromatic hydrocarbons in food samples by ...
Using the in-tube SPME HPLC-FLD method, good linearity of the calibration curve (r>0.9972) was obtained in the concentration range of 0.05-2.0 ng/mL, and the detection limits (S/N=3) of PAHs were 0.32-4.63 pg/mL. The in-tube SPME method showed 18-47 fold higher sensitivity than the direct injection method.
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Development of a video-based slurry sensor for on-line ash analysis ...
Recently, researchers at VPI&SU have developed an optical sensor for phosphate analysis. The sensor uses image processing technology to analyze video images of phosphate ore. It is currently being used by Texasgulf for off-line analysis of dry flotation concentrates.
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Tackling Australia's Coal Mine Methane Problem | Ember
Australia's coal mines have a methane problem. In 2019, they released 68% of Australia's methane emissions from the energy industry overall, making coal mines a larger contributor than both oil and gas. What's more, new evidence suggests emissions are underreported and are actually significantly higher than this.
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An On-Line Integrated Control System for Reducing Coal Costs and Coal ...
The U.S. Department of Energy's Office of Scientific and Technical Information
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Elemental and proximate analysis of coal by x-ray fluorescence assisted ...
Although laser-induced breakdown spectroscopy (LIBS), as a fast on-line analysis technology, has great potential and competitiveness in the analysis of chemical composition and proximate analysis results of coal in thermal power plants, the measurement repeatability of LIBS needs to be further improved due to the difficulty in controlling the stability of the generated plasmas at present.
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(PDF) Method development for the determination of thallium in coal ...
Method development was carried out was determined by the availability of reliable reference using aqueous calibration solutions in 5% v/v nitric acid, values, was too small to arrive at a final conclusion. and with BCR-180 coal RM as a model substance for direct However, both the inconsistent results obtained without a solid sample analysis.
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Online X-ray Elemental Analysis of Coal with a ... - Online - Inline
Fig. 2: Volatiles of the received coal Fig. 3: Volatiles of the blended coal Using the model developed in the laboratory it was discovered that all 6 of these varying coal types could be calibrated into one calibration curve, as shown in fig. 2. The accuracy for the volatiles is 1.5 wt.-% at one sigma.
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A method to calibrate a camera using ... - Semantic Scholar
This work proposes a calibration method using the perpendicularity of the lines on a 2D target in the world coordinate system and achieves a relatively higher calibration precision. Camera calibration based on point features leads the main trends in vision-based measurement systems for both fundamental researches and potential applications. However, the calibration results tend to be affected ...
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The Integral Benefits of Iron Monitoring for Steam Generation Chemistry ...
Based on the method of oxygenated treatment (OT) that arose in Europe in the early 1970s, EPRI developed a program to replace AVT(R) for drum units, known as AVT(O), which stands for all-volatile ...
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Coal Ash Companies (Waste and Recycling) - Environmental-Expert.Com
SonoAsh LLC. based in Vancouver, BRITISH COLUMBIA (CANADA) Since 2009, SonoAsh has worked to create a new, sustainable twenty-first century narrative for Coal Ash. There is a better way of processing and liberating the hidden value of Coal Ash. SonoAsh's proprietary technology allows for the processing of ...
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Technical data on nucleonic gauges - IAEA
FIG. 1. Principle of transmission method. Dual energy gamma-ray transmission (DUET) This technique is probably the most common nucleonic method for on-the-belt determination of ash content in coal. Ash content is determined by measuring the transmission through coal of narrow beams of low and high-energy gamma rays (Fig. 2).
WhatsApp:+8617329420102Industrial at-line analysis of coal properties using laser-induced ...
A fully automatic LIBS system was developed for at-line, in-situ industrial coal analysis. • A series of techniques were integrated to improve measurement accuracy and repeatability. • Synergic regression was proposed to improve quantification performance and model interpretability. •
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The sustainable development of coal mines by new cutting ... - Journals
In order to reduce the size of coal pillars and improve the coal recovery rate in coal mines, the small-pillar method has been developed. It is designed to arrange the roadway in the stress reduction area of the surrounding rock. The width of small coal pillars is generally between 3 and 6 m [6].
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On-Conveyor Belt Determination of Ash in Coal
non-linear calibration methods is the need with the latter for a much larger amount of data to allow cross-validation or testing of the derived calibration equation on a new set of data. 5. PRELIMINARY MEASUREMENTS ON SIMULATED COAL SAMPLES Preliminary tests were first carried out on 18 simulated coal samples, each of mass 30 kg,
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Porosity Analysis Based on CT Images of Coal Under Uniaxial Loading
2. Materials and Methods. 2.1. Coal Sample . The coal samples from Datong in Shanxi Province, that consisted of 92% non-crystalline, 3.7% clay minerals, 2.7% boehmite, and 1.6% gibbsite, were used in these experiments. These samples were taken at depth of 395 m below the surface. With mercury intrusion method, the porosity and the
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Journal of Analytical Methods in Chemistry - Hindawi
The 1000 μ g/ml standard 103 Rh stock solution (GSB 04-1746-2004, National Center of Analysis and Testing for Nonferrous Metals and Electronic Materials) was used to prepare the internal standard (10 μ g/L) for online addition during ICP-MS analytical process.
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CALIBRATION OF ONLINE ANALYZERS USING NEURAL NETWORKS - UNT Digital Library
Neural networks were used to calibrate an online ash analyzer at the Usibelli Coal Mine, Healy, Alaska, by relating the Americium and Cesium counts to the ash content. A total of 104 samples were collected from the mine, with 47 being from screened coal, and the rest being from unscreened coal.
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Frontiers | Calibration of Water Inrush Channel and Numerical ...
The surrounding rock of a coal mine roof fractures with the excavation of the underground working face in coal mining. These mining-induced fractures are connected and extended upward to form water inrush channels. A water inrush accident may occur when there is a sufficiently large water source. To elucidate the formation mechanisms of the roof water inrush channel and the characteristics of ...
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Comparative Study of Four Chemometric Methods for the Quantitative ...
Coal is a heterogeneous mineral substance mainly composed of carbon, along with various amounts of other elements. The carbon content is an important and pertinent parameter for coal quality. To achieve the rapid and accurate online measurement of the carbon content in coal, four different calibration strategies are applied to coal analysis by laser-induced breakdown spectroscopy (LIBS). Four ...
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Multi loop magnetisation based method for detecting coal ... - Preprints
electromagnetic detection, and developed the MTC, GDJY, and a series of other wire rope detectors that can realise quantitative identification of broken wires [10-12]. The wire rope flaw detector jointly developed by the Harbin University of Technology and Fushun branch of the China Coal Research Institute can detect both LF and LMA damage [13].
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JPCS Flow meter calibration - Institute of Physics
Calibration method The meter was calibrated in first moment by weighing method. For this method were used two equal balances with capacity of 300 kg and 2 g resolution [Fig. 1]. The balances were calibrated before and after of meter calibration. One 350 L capacity container was positioned on each balance. The totalized
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Bulk material analyzer calibration block - Gamma-metrics
such method includes the steps of (a) inserting within the activation region a calibration block that includes a block of a solidified homogeneous mixture of known materials in known proportions, wherein the materials do not react chemically with one another; (b) taking measurements with the bulk material analyzer while the calibration block is .
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Ash-Moisture Coal Analyzer - Nevco
DF-5756A Online Non-radioactive Ash-Moisture Analyzer is a safe and reliable online analytical instrument with distinguished performance. It can be applied to the real-time online measurement on ash content and moisture content in coal, and give out reference value corresponded with CV through calculation. The instrument measures ash content by ...
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Coal-fired power plant carbon emission on-line monitoring method based ...
the coal-fired power plant carbon emission on-line monitoring method based on the laser induced breakdown spectroscopy combines the libs detection method with the carbon balance method, which can realize continuous online measurement, and has the advantages that the analysis speed is high, the sensitivity is high, the preparation of samples is .
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University of Wollongong Research Online
calibrated using triaxial test data. Simulation of the LTCC process used a Particle Flow Code (PFC) model of coal behaviour based on the SRM results embedded within a FLAC model to allow simulation of both far field and near field effects. This allows the influence of depth, mining induced stresses, goaf
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Developing and using empirical models for geotechnical design in ...
modelling and analysis techniques utilised in the Australian underground coal industry to assist in geotechnical design and in particular ground support design. Furthermore it is hoped that this paper can make a significant contribution (moving forward) that allows geotechnical practitioners to better understand that an empirical method based on
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Digital holographic sizer for coal powder size distribution measurement ...
The variety of coal burnt in the power plant makes it difficult for electrical and ultrasonic methods to calibrate and ensure the measurement accuracy. The piezoelectric method, one of the electrical methods, measures the electric signal generated by a particle impacting a piezoelectric sensor and inverts the particle size by means of a ...
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Overview of Industrial Materials Detection Based on Prompt Gamma ...
Prompt gamma neutron activation analysis (PGNAA) is a non-destructive online measurement nuclear analysis method. With its unique advantages, it has been widely used in online analysis of industrial materials such as coal, cement, and minerals in recent years. However, there are many kinds of literature on PGNAA in the field of industrial materials detection, and there are still a few ...
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Multicomponent Measurement of Respirable Quartz, Kaolinite and Coal ...
A comparison of the predicted quartz concentrations obtained from the samples in the PCR calibration set containing coal dust and kaolinite was made with those values obtained following MDHS 101 method . MDHS 101 uses a calibration based on the Beer-Lambert law i.e. the absorbance response is directly proportional to the concentrations of ...
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