Define Washing Curve

Coal washing is accomplished by one of two major processes, by density separation or by froth flotation. This density curve will be applied to all the attributes, and save to a StrataCalc Datasheet STC file, so that the selected float level density of attributes can be gridded and saved in the geologic model. Define Washing Curve is a prerequisite for Apply Wash to define the wash curve for the desired density interval, attributes, and their values. The data is entered here to define the minimum and maximum float levels, the interval for the density. The total mass of the sample is shown in the total material field. All attributes are custom entered based on what is in the sample report. This algorithm assigns each strata/bed interval value to a washing file, saved out as a *.WASH file. 

The Units are custom defined by the user and can be lbs/ft3 or Kg/m3. The mass can be custom defined to Kg, pounds, or anything the user wants. The Float Density is a specific gravity or relative density. The Sink is the material that is higher than the density, and sinks to the bottom. The attributes in the columns are the values of each, when washed to the density, removing any heavy waste rock.

Material Source: Selecting a drillhole graphically is optional, but is useful in going through each drillhole's strata/bed entry and finding the best fit between wash file raw material, and drillhole strata/bed values. Preselecting the drillhole will limit the scope of the best-fit search within that drillhole.  If the drill hole is not selected, each strata/bed interval will be checked against every wash file to find the best fit.  This is why preselecting the Source Drillhole is an optional input but does give the potential of speeding up the process.  The output summary from Apply Wash shows the wash file and drillhole strata/bed match up, and the associated fitting error, a lower number indicates closer match between raw and drillhole values.

Testing Source: These fields are used to identify the Lab Name, ID# and Date of the sample. This is saved in the WASH file for later reporting and review.

Add Float Level: This adds a new row to insert a new density.

Add Attribute: This adds a new column for a new attribute. The name will be incremental, such as "Attribute5".

Edit Attribute Title: This option will rename the newly added attribute to the desired name.

Delete Float: This removes the selected row of the selected density.

Delete Attribute: This removes the selected attribute column.

Clear Data: This option deletes all the rows and columns of float levels and attributes for starting over.

Save/SaveAs/Load: This command creates a *.WASH file that is then used for Apply Wash. Each seam sample is saved as its own wash file. The format is comma delimited and is shown here. This format could also be edited or created in Excel, if the user prefers.

Source Drillhole,DH-01CPY
Data Mode,0,0 : Fractional   1 : Cumulative
Row Names,Float Density,Mass,Inherent Moisture,Ash Content,Volatile Matter,Fixed Carbon,Calorific Value,Total Sulphur
Unit Type,Kg/m3,Kg,%(ad),%(ad),%(ad),%(ad),MJ/kg,%(ad)
Total Material,1.6832,1.2800,2.2203,34.3625,20.2891,43.1281,19.6049,0.9196
Float 1,1.5000,0.2200,2.5000,15.1000,32.2000,50.2000,27.5000,1.7800
Float 2,1.5500,0.1100,2.2000,23.2000,25.0000,49.6000,24.9000,0.0670
Float 3,1.6000,0.0900,2.2000,26.5000,21.0000,50.3000,22.5600,0.7600
Float 4,1.6500,0.0800,2.3000,28.5000,19.4000,49.8000,20.7700,0.3800
Float 5,1.7000,0.1600,2.4000,32.8000,17.7000,47.1000,20.0100,0.4400
Float 6,1.7500,0.2000,2.3000,38.3000,16.5000,42.9000,17.6100,0.5500
Float 7,1.8000,0.1300,2.1000,42.2000,15.9000,39.8000,16.3500,0.3800
Sink,1.8000,0.2900,1.9000,51.9000,15.5000,30.7000,12.9800,1.5500

Shown here in Excel:

Prompts

Command: C:DEFINEWASH
Define Washing Curve Dialog

Drop-Down Menu Location: StrataCalc ->Wash Filter->Define Washing Curve
Keyboard Command: definewash