What is mining tonnage?
The tonnage factor provides the mechanism for the conversion from volume of ore to weight of ore. In the English system, the tonnage factor is normally expressed as cubic feet per ton of ore. In the metric system, the tonnage factor is the specific gravity of the ore.
What does G t mean in mining?
Grams per tonne
Grams per tonne of milled ore, or g/t, is the most common metric used to represent the grade of ore. The value of a precious metals mine is determined by its total estimated weight, the grade of the ore, and how difficult it is to extract and distribute.
What is grade of an ore?
The grade of ore refers to the concentration of the desired material it contains. The value of the metals or minerals a rock contains must be weighed against the cost of extraction to determine whether it is of sufficiently high grade to be worth mining, and is therefore considered an ore.
How do I know the tonnage of my truck?
Subtract the maximum allowed fully loaded weight from the curb weight to get the maximum tonnage or payload. Refrain from overloading your truck or van for safety and optimum operation of the vehicle.
How much area does a ton of riprap cover?
35 to 40 linear feet
The average is usually from about 3″ to 8″ in size. One ton of rip rap will usually cover an area of 35 to 40 linear feet, spread 3′ wide.
What’s the highest grade gold?
Technically speaking, the highest grade of gold would be nuggets, which are some of the only naturally occurring deposits of gold. Even these tend not to be pure 24-carat gold, but are certainly the highest grade found naturally….Open Pit:
| Low grade | 0 – 0.5 gold grams per tonne |
|---|---|
| High grade | 1.5 + gold grams per tonne |
Which is the best definition of the word tonnage?
Definition of tonnage. 1a : the cubical content of a merchant ship in units of 100 cubic feet. b : the displacement of a warship. 2a : total weight in tons shipped, carried, or produced. b : impressively large amount or weight. 3 : a duty formerly levied on every tun of wine imported into England.
How is the gross tonnage of a ship calculated?
What is Gross Tonnage: Gross Tonnage is a measure of the ships total interior volume and is calculated by multiplying the interior volume “V” of the ship in cubic meters by a variable known as “K” (which varies depending on the ships overall volume). Gross Tonnage is not to be confused with Gross Registered Tonnage which is explained below.
How to calculate the tonnage of an ore sample?
The standard method of making these estimates is to find the cubic contents of triangular prisms, in the apexes of which the drill holes are placed, by multiplying the surface area by the average depth of the ore in the three drill holes and then multiplying the cubic contents by the specific gravity of the ore or rock to find the tonnage.
What do you mean by deadweight tonnage on a ship?
What is Deadweight Tonnage: Deadweight tonnage is the weight (in tons) of all the cargo, fuel, dry provisions, supplies, etc. carried on board the ship. In other words, it is the “displacement tonnage” of the vessel minus the “lightweight tonnage” (see lightweight tonnage below).