Coal storage density standard

Does bulk density of coal vary within a stockpile?

The bulk density of coal can vary within a stockpile as it is dependent on the degree of compaction and the coal properties, including moisture and particle size. Thus the choice of the measurement locations is important.

What is the value of coal stored in stockpiles?

The value of coal stored in stockpiles can form a significant part of the end user’s costs. For instance, coal represents 60–80% of a power plant’s operating costs. Capital tied up in the stockpiles gives no return on investment and one way to reduce costs is to optimise coal inventories.

How is coal stockpile tonnage determined?

The coal stockpile tonnage is determined by measuring the volume and density of the stockpiled coal. This value is then used as the reference against which to compare the book inventory. Book inventories are maintained from recorded weights of coal going into and coming out of the stockpile.

How do you measure dustiness of coal?

By knowing the dustiness potential of the coal, appropriate control measures can be implemented. The test method must be appropriate to the particular dust problem. Dust generated from a falling stream of coal within an enclosed chamber provides a measure of the dust arising during stockpile stacking.

What is a coal storage system?

The system provides a storage capacity for 180,000 t of coal (equivalent to a ship load) and has a diameter of 120 m. The roof is made of aluminium attached to a concrete retaining wall (Bulk Solids Handling, 1998). Covers have also been constructed in concrete, air-supported fabrics and galvanised steel.

What is a physical inventory of tons of coal?

Access your content now. 4.1 The physical inventory of tons of coal in a stockpile, as calculated by this practice, may be used for accounting and tax purposes. 4.2 The inventory results may be compared to other estimates of the inventory, such as: 4.2.1 Tons from a previous inventory less tons shipped or consumed.