Platts therefore no longer specifies the Conradson Carbon Residue (CCR) measurement used in some of Platt's fuel oil assessments in order to remain consistent with the ISO 8217:2010 standard. The two measuring bases express the results of two different, but
where μ s is the coefficient of static friction and μ k is the coefficient of kinetic friction. The value of μ s is generally higher than the value of μ k for a given combination of materials.. Coefficients of friction between materials are best determined through testing. However, it is possible to find tables in the literature for friction coefficients between …
LNG. View our key LNG price assessment Platts JKM™ for spot physical cargoes delivered ex-ship into Japan and South Korea (with normalized prices for spot cargoes to China and Taiwan also included) alongside JKM™ swaps. Access daily LNG spot market assessments: delivered ex-ship prices for Northwest (NWE) and Mediterranean (MED), …
The texture coefficient, Vickers hardness, and Schmidt hammer rebound number were tested and assigned to each rock type. After that, a set of laboratory drilling tests were carried out on each sample using a new test rig developed for this purpose. As a standard method for vibration analysis, the "root mean square (RMS)" value was applied ...
Coefficient of friction Compression set after 24 hr at 175C % Compressive modulus GPa Compressive strength MPa Elongation at break % Hardness - Rockwell Izod impact strengt h J m-1 Poisson's ratio Tear strength N mm-1 Tensile modulus GPa Tensile strength MPa Cellulose Acetate Butyrate CAB - - - - - 60 99 260 - - 0.3-2.0 20-60 Ethylene-
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The results show that there is a "concave" quadratic relationship between the filling step and the maximum displacement of the floor, and there is a "convex" quadratic relationship …
With an inclined width of 195 m and a mining depth of 1000 m, with the working face had an inclination angle of 3 to 10 and the Platts hardness coefficient of …
Since the coefficient of hardness mainly reflects only fracturing under compressive loads, and in real conditions tensile and shearing forces are often used, it becomes necessary to introduce ...
The Platts hardness factor of coal seam is less than 1 (f < 1), and the structure is simple. The inclination angle is between 27° and 55°, with an average of 45°. ... a 13 are polynomial coefficients, constants, as shown in Table 3. Table 3 Polynomial coefficient values of coal face displacement prediction model. Full size table.
A technology of mechanical properties and ore, used in the application of stable shear force to test the strength of materials, grain processing, testing the hardness of materials, etc. Pulverization and other problems, to achieve the effect of reducing the content of particle size, reasonable composition, and increasing the content of the intermediate easily …
DOI: 10.1016/J.JAFREARSCI.2015.01.005 Corpus ID: 129311365; Correlation between Schmidt hardness and coefficient of restitution of rocks @article{Ansari2015CorrelationBS, title={Correlation between Schmidt hardness and coefficient of restitution of rocks}, author={M. K. Ansari and M S Ahmad and Rajesh …
Iron ore is one of the most important mineral resources supporting national economy development,whether we can make economical ues of it,which is in relation to the healthy development of steel industry and industry security.But with the mass exploiting of iron ore,the iron ore with the high grade and easy to separate have became scarcity,so ...
1, the mining object high hardness (Platts hardness coefficient =16 18), the material block degree (weight>500 kgaccounted for 30%), the Qing (eating) foundation work, this is the worst condition. As in Lianyungangportconstruction, mining rock are gneissic granite, bucket teeth service life is very short, only 8 – 12 days.
S&P Global Platts (Platts), the leading independent provider of information, analytics and benchmark prices for the commodities and energy markets, today announced that commencing October 1st, it will launch the first ever daily carbon offset premiums alongside monthly carbon intensity calculations for 14 major crude fields around the world. The …
The hardness of the ore is expressed by the compressive strength of the ore or the Platts hardness coefficient (The compressive strength divided by 100 is …
In the study by Sachpazis (1990), equations with high correlation coefficients between the USC and the SHH for the calcium carbonate rocks were determined. ... Hardness is an empirical test used to identify and classify materials and therefore the hardness value of rock varies according to the applied hardness method. …
Material 4140 coefficients of linear thermal expansion: Temperature, °C (°F) Value (10-6 /K) Treatment or condition: 20-100 (68-212) 12.2: Oil hardened, tempered: 20-200 (68-392) 12.6: ... and the corresponding Rockwell hardness can be obtained. Forging. Material 4140 forging temperature is about 1232 °C (2250 °F).
Coefficients of average lateral stress are from 0.48 to 1.44; their regression curve falls between the Hoek–Brown outer envelope and the Hoek–Brown median envelope. Introduction. With expanding economic development and the growing demand for energy, coal will remain the main energy source in China well into the future (Yuan, …
The hardness is low (Platts hardness: 1– 3), and the particles are fragile. The hydraulic permeability coefficient is relatively small: 1 × 10 −13 – 2 × 10 −9: ... The characteristics of the selected substrate include high porosity and permeability coefficient, stable chemical properties, strong decontamination ability, etc., which ...
After many evolutions, in 1950, M.M. Protochi Yakonov (who was the son of the elder Platts scholar) proposed the "mashing method" [4-6]. This method was used only to determine the consistent coefficient of the coal. The method was later widely used by many researchers to determine the firmness coefficient of rock.
The rock firmness coefficient (also known as the Platts coefficient) proposed by Protokyakonov is still widely used in mining operations and exploration and …
Platts is constantly reevaluating this model, discussing industry feedback and trends to make the Platts Analytics Yields and Netbacks valuations more accurate. Where Platts Analytics Yields and Netbacks can be found Platts Analytics Yields and Netbacks calculations are produced every day for all locations. They are available through several
In the test, the hard granite, a kind of solid and compact rock with the Platts hardness coefficient of 15–17, was selected as the grinding material. The mass loss of …
1, the mining object high hardness (Platts hardness coefficient =16 18), the material block degree (weight>500 kgaccounted for 30%), the Qing (eating) foundation work, this is the worst condition. As in Lianyungangportconstruction, mining rock are gneissic granite, bucket teeth service life is very short, only 8 – 12 days.
By size Platts hardness coefficient can be divided into five ore hardness level> Platts hardness grade ore ore hardness coefficient is very soft, for example <2 bituminous coal, lignite, water quenched slag, ash, clay, mix 2-4 soft limestone, shale, clayey sandstone, slag, coal gangue 4-8 in a hard limestone, gypsum, quartz sandstones, fluorite ...
The Platts hardness factor of coal seam is less than 1 (f < 1), and the structure is simple. The inclination angle is between 27° and 55°, with an average of 45°. …
The flushing effect also will be very low when the Platts coefficient of coal near the flushing hole is very high. ... Generally, coal with high hardness is commonly considered to be a non-outburst risk; however, several coal mines with hard coal seams in China have experienced coal and gas outbursts. Coals with different degrees of ...
The experimental values of compressive strength of argillaceous sandstone and sandy mudstone are 20~42 MPa, platts hardness coefficient f = 3.2, and the roof …
Table 1 shows experimental data on the correspondence of the hardness coefficient according to M. M. Protodyakonov to the specific drilling energy and the specific blasting energy [11,12,13 ...
Hardness and thickness are important dimensions of plating materials because the effectiveness, longevity, and cost of the final product depend, not only on the …
1, the mining object high hardness (Platts hardness coefficient =16 18), the material block degree (weight>500 kgaccounted for 30%), the Qing (eating) foundation work, this is the worst condition. As in Lianyungangportconstruction, mining rock are gneissic granite, bucket teeth service life is very short, only 8 – 12 days.
The global Iron Ore specifications guide contains the primary specifications and methodologies for Platts Iron Ore global catalogue of price assessments. The various sections of this guide are designed to give S&P Global Commodity Insights subscribers as much detail as possible about a wide range of methodology and specification issues.