# Calculating Coal Relative Density

#### Estimating tons of coal on a property,Kentucky

Sep 19, 2019 If the purpose of the calculation is to obtain a general estimate for the tonnage of coal on a property or a regional average resource estimate, site-specific information (the details of coal composition) are not needed and an average coal density is commonly used for the calculation. Relative coal density is measured as specific gravity.get price

#### Relative density Wikipedia

Relative density(RD) or specific gravity (SG) is a dimensionless quantity, as it is the ratio of either densities or weights $${\displaystyle {\mathit {RD}}={\frac {\rho _{\mathrm {substance} }}{\rho _{\mathrm {reference} }}}\,}$$where RD is relative density, ρsubstance is the density of the substance being measured, and ρreference is the density of the reference. (By convention ρ, the Greek letter rho, denotes density.) The reference material can be indicated using subscripts: RDsubstance/reference, which meaget price

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Relative density(RD) or specific gravity (SG) is a dimensionless quantity, as it is the ratio of either densities or weights $${\displaystyle {\mathit {RD}}={\frac {\rho _{\mathrm {substance} }}{\rho _{\mathrm {reference} }}}\,}$$where RD is relative density, ρsubstance is the density of the substance being measured, and ρreference is the density of the reference. (By convention ρ, the Greek letter rho, denotes density.) The reference material can be indicated using subscripts: RDsubstance/reference, which means "the relative density of substance with respect to reference". If the reference is not explicitly stated then it is normally assumed to be water at 4 °C (or, more precisely, 3.98 °C, which is the temperature at which water reaches its maximum density). In SI units, the density of water is (approximately) 1000 kg/m or 1 g/cm,which makes relative density calculations particularly convenient: the density of the object only needs to be divided by 1000 or 1, depending on the units. The relative density of gases is often measured with respect to dry air at a temperature of 20 °C and a pressure of 101.325 kPa absolute, which has a density of 1.205 kg/m . Relative density with respect to air can be obtained by $${\displaystyle {\mathit {RD}}={\frac {\rho _{\mathrm {gas} }}{\rho _{\mathrm {air} }}}\approx {\frac {M_{\mathrm {gas} }}{M_{\mathrm {air} }}}}$$Where M is the molar mass and the approximately equal sign is used because equality pertains only if 1 mol of the gas and 1 mol of air occupy the same volume at a given temperature and pressure i.e. they are both Ideal gases. Ideal behaviour is usually only seen at very low pressure. For example, one mol of an ideal gas occupies 22.414 L at 0 °C and 1 atmosphere whereas carbon dioxidehas a molar volume of 2get price

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#### Coal assay Wikipedia

OverviewPhysical and mechanical propertiesChemical properties of coalSpecial combustion testsCoal classification by rankExternal links

Relative density or specific gravity of the coal depends on the rank of the coal and degree of mineral impurity. Knowledge of the density of each coal play is necessary to determine the properties of composites and blends. The density of the coal seam is necessary for conversion of resources into reserves. Relative density is normally determined by the loss of a sample's weight in water. This is best achieved get price

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#### The apparent relative density of New Zealand coals

Calculations of moist and dry coal density and of moist and dry mineral density are made from these figures. Dry coal density displays a linear relationship with coal rank (as measured by moist mineral free specific energy) over the range ofcoals studied. The results provide a means of more accurate calculation ofcoal quantities and a guide toget price

#### Coal Density an overview ScienceDirect Topics

Coal density is among the important parameters for reservoir engineering purposes and is inserted as an input property in simulation studies. Coal density is typically less than that of conventional reservoirs and differs from seam to seam based on the given coal rank and purity [2].The bulk density of a coal consists of the matrix and the void space, with the latter being expectedly filledget price

#### ASTM D3588 98(2017)e1 Standard Practice for Calculating

1.1 This practice covers procedures for calculating heating value, relative density, and compressibility factor at base conditions (14.696 psia and 60°F (15.6°C)) for natural gas mixtures from compositional analysis. 2 It applies to all common types of utility gaseous fuels, for example, dry natural gas, reformed gas, oil gas (both high and low Btu), propane-air, carbureted water gas, cokeget price

#### Slurry Densities

ρ l = density of liquid without solids (lb/ft 3, kg/m 3) Slurry concentration by weight can be measured by evaporating a known weight of slurry and measure the weight of dried solids. Example Calculating Slurry Density. The density of a slurry where. the density of the solids is 2500 kg/m 3; the density of the liquid is 1000 kg/m 3get price

#### Estimation of In-Situ Density from Apparent Relative

The field measurement of in situ density adapted the standard civil engineering technique described in AS 1289.5.3.2_1993 which explicitly measures the volume of the void left after removing a carefully weighed mass of coal using a graded sand of known bulk density.get price

#### Specific Gravity Calculator Formula Definition

The specific gravity calculator determines the relative density of a substance compared to cold freshwater; very useful for knowing if a material floats or sinks, or estimating the amount of alcohol in your homebrew beer.. The article explains how to find specific gravity by providing the specific gravity formula, explores what is specific gravity at all, and compares specific gravity vs. density.get price

#### Density Calculator

This free density calculator determines any of the three variables in the density equation given the other two. In addition, explore hundreds of other calculators including topics such as finance, math, health, fitness, weather, and even transportation.get price

#### What is the density of coal? Answers

Density of Coal may vary, depends on the type (structure) and form. Below are some density of coal : Coal, Anthracite, solid 1.506 gr/ml Coal, Anthracite, broken 1.105 gr/ml Coal, Bituminousget price

#### Estimation of In-Situ Density from Apparent Relative

The field measurement of in situ density adapted the standard civil engineering technique described in AS 1289.5.3.2_1993 which explicitly measures the volume of the void left after removing a carefully weighed mass of coal using a graded sand of known bulk density.get price

#### How to Determine the Relative Density of Soils

To determine the relative density, it is necessary to determine the specific gravity of soils in order to calculate the void ratio from dry density in the loosest, in-situ, and densest states. It is useful to express relative density directly in terms of dry density in loosest, in-situ, and densest states, so get price

#### Coal Calculations Mining SGS

Seyler’s calculation is only valid for most bituminous coals. Note 1. NOT valid when the estimated Hdb is less than 3% Note 2. NOT valid when the Odaf content is greater than 15% Note 3. NOT valid for estimation of H if coal shipments are a blend of low rank coal, get price

#### Absolute Density an overview ScienceDirect Topics

The absolute density or specific mass is the mass per unit volume of fluid and is represented by ρ. Relative density is defined as the quotient between the specific mass of the liquid under study and the density of pure water at 3.98 ° C, which value is 1 g/cm 3.The densities are in general calculated from methods involving determination of mass in a known volume of liquid pycnometerget price

#### Calculation of density from relative density Physics

Calculation of density from relative density. Suppose we have measured the relative density of a liquid as described above and found it to be 0.8. If we now assume that 1 cm ‘ of water has a mass of 1 g, it follows that the mass of any volume of water is numerically the same as its volume in cm ‘.get price

#### The Density of Common Rocks and Minerals

Jan 23, 2020 The densities of rocks and minerals are normally expressed as specific gravity, which is the density of the rock relative to the density of water. This isn't as complex as you may think because water's density is 1 gram per cubic centimeter or 1 g/cm 3. Therefore, these numbers translate directly to g/cm 3, or tonnes per cubic meter (t/m 3).get price

#### ASTM Standard Volume 05.06 Gaseous Fuels, Coal and Coke

D3180-89(2002) Standard Practice for Calculating Coal and Coke Analyses from As-Determined to Different Bases; D3302-02 Standard Test Method for Total Moisture in Coal; D3402-93(2001) Standard Test Method for Tumbler Test for Coke; D3588-98 Standard Practice for Calculating Heat Value, Compressibility Factor, and Relative Density of Gaseous Fuelsget price

#### Float-Sink (Washability) Test, Coal Analysis, Kentucky

Jul 27, 2020 The single float-sink test defines the relative amount of float-product and sink-reject that should result from the coal being washed in that preparation plant. The second type of float-sink analysis tests a coal sample in a succession of density baths to determine the optimal density for separation of the coal from rocks and minerals.get price

#### Bulk Density Chart Anval

Bulk Density Chart ANVAL VALVES PVT LTD. Material Lbs/cu.ft Kgs/cu.m Abrasive Compound 148 2371 Abrasive Mix 153 2451 Acetate 35 561 Acetate Flakes 21 336 Acrylic Fibres Cinders, Coal, Ashes & Clinker 40 641 Cinnamon Powder 35 561 Citric Acid 48 769 Clay 50 801 Clay (Bentonite) 50 801 Clay (Calcined) 30 481 Clay (Fine) 62 993get price

#### How is the bulk density of coal determined? Quora

Jul 05, 2018 Bulk Density of Coal depends on Size.Grade or Quality and Moisture in Coal. In a laboratory, Bulk Density is measured by filling the Coal in an empty Vessel of size one Metre height,length and breadth. The nett weight of coal gives the bulk densit...get price

#### Calculating Physical Properties Of Slurries Cheresources

Mar 15, 2013 Calculate the viscosity of a slurry mixture consisting of salt (50 percent by weight) in saturated brine assuming a newtonian fluid. The viscosity of brine is 2.0 cP, and the density of brine is 1200 kg/m 3 and that of salt is 2082 kg/m 3. Calculations: Inputs: Liquid Density, ρ L = 1200 kg/m 3 Solid Density, ρ s = 2082 kg/m 3 C w = 50% Results:get price

#### ISO 23499:2013(en), Coal ? Determination of bulk density

The bulk density of coal is influenced by its physical characteristics, such as relative density, shape and size distribution of the coal particles, on the coal moisture content as well as on the dimensions of the measuring container.get price

#### What Is the Bulk Density of Coal? Reference

Apr 04, 2020 The three types of coal are anthracite coal, bituminous coal and lignite coal. Anthracite coal has a bulk density of 50 to 58 pounds per cubic feet, or 800 to 929 kilograms per cubic meter. It is a mature coal and is very hard and shiny. Bituminous coal has a bulk density of 42 to 57 pounds per cubic feet, or 673 to 913 kilograms per cubic meter.get price

#### ASTM-D3588 Standard Practice for Calculating Heat Value

Scope. 1.1 This practice covers procedures for calculating from compositional analyses, the following properties of natural gas mixtures: heating value, relative density and compressibility factor at base conditions (14.696 psia and 60°F).get price

#### Absolute Density an overview ScienceDirect Topics

The absolute density or specific mass is the mass per unit volume of fluid and is represented by ρ. Relative density is defined as the quotient between the specific mass of the liquid under study and the density of pure water at 3.98 ° C, which value is 1 g/cm 3.The densities are in general calculated from methods involving determination of mass in a known volume of liquid pycnometerget price

#### The Density of Common Rocks and Minerals

Jan 23, 2020 The densities of rocks and minerals are normally expressed as specific gravity, which is the density of the rock relative to the density of water. This isn't as complex as you may think because water's density is 1 gram per cubic centimeter or 1 g/cm 3. Therefore, these numbers translate directly to g/cm 3, or tonnes per cubic meter (t/m 3).get price

#### Calculation of density from relative density Physics

Calculation of density from relative density. Suppose we have measured the relative density of a liquid as described above and found it to be 0.8. If we now assume that 1 cm ‘ of water has a mass of 1 g, it follows that the mass of any volume of water is numerically the same as its volume in cm ‘.get price

#### ASTM D 3588 : 1998 : R2017 Standard Practice for

1.1 This practice covers procedures for calculating heating value, relative density, and compressibility factor at base conditions (14.696 psia and 60°F (15.6°C)) for natural gas mixtures from compositional analysis. 2 It applies to all common types of utility gaseous fuels, for example, dry natural gas, reformed gas, oil gas (both high and low Btu), propane-air, carbureted water gas, cokeget price

#### U. S. DEPARTMENT OF THE INTERIOR GEOLOGICAL SURVEY

Bulk density the weight in air of a unit volume of a solid including both the permeable and impermeable voids which are normal to the material at a stated temperature (ASTM, 1979a). The most common methods of measuring true density of coal use helium as get price

#### ISO 23499:2013(en), Coal ? Determination of bulk density

The bulk density of coal is influenced by its physical characteristics, such as relative density, shape and size distribution of the coal particles, on the coal moisture content as well as on the dimensions of the measuring container.get price

#### How do you calculate density and relative density? Answers

Density is the ratio of an object's mass divided by its volume. The standard international unit to measure density is kilograms per cubic meter (kg/m3). The addition of "relative" to the term isget price

#### What Is the Bulk Density of Coal? Reference

Apr 04, 2020 The three types of coal are anthracite coal, bituminous coal and lignite coal. Anthracite coal has a bulk density of 50 to 58 pounds per cubic feet, or 800 to 929 kilograms per cubic meter. It is a mature coal and is very hard and shiny. Bituminous coal has a bulk density of 42 to 57 pounds per cubic feet, or 673 to 913 kilograms per cubic meter.get price

#### (PDF) An optimization study of yield for a coal washing

The results of the float-sink tests showed that the most convenient washing operating density was 1.6 g/cm3, and the weight yield of the clean coal was 53.16%wt. (70.94% coal recovery) with 16.46%get price

#### Relative Density of SLM-Produced Aluminum Alloy Parts

particularly related to the choice of reference materials for calculating relative density. It can be observed, for example, that, depending on the experimental conditions, the calculation can lead to relative densities higher than 100%, which is inconsistent. This article shows that it is essential that aget price

#### Percent Solids to Specific Gravity Conversion of Slurry

Here is the formula for specific gravity of a slurry, S is: S = specific gravity of slurry Si= specific gravity of liquid phase Ss= specific gravity of solids phase Cw = concentration of solids by weight Cv= concentration of solids by volume EXAMPLE: if the liquid has a specific gravity of 1.2 and the concentration of solids by weight is 35% with the solids having a specific gravity of 2.2get price

#### How to calculate density and relative density Quora

May 31, 2018 Density is given by the product of relative density and the reference density, which is usually the density of water. $\rho=\rho_{(relative)}$×[math]\rhoget price

#### ASTM D 3588 : 1998 Standard Practice for Calculating

CONTAINED IN VOL. 05.06, 2017 Defines procedures for calculating heating value, relative density, and compressibility factor at base conditions (14.696 psia and 60 degrees F (15.6 degrees C)) for natural gas mixtures from compositional analysis.get price