What is ore tonnage calculation?

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 …

What is the tonnage factor?

Tonnage factors In the metric system, the tonnage factor is the density, or specific gravity. In the English system, the tonnage factor is usually expressed in cubic feet per short ton (cu ft/st). When the volume in cubic feet is divided by cu ft/st, the resulting figure is in English short tons.

How is ore measured?

Developed ore usually is calculated first for each of the different areas or blocks bounded by drifts, raises, winzes, and outlines of stoped areas. The volume of each block is its area times the average thickness of the ore in the block.

How is assay calculated?

The industry-accepted formula for assay on anhydrous basis = (assay on as-is basis×100)/(100-\%water).

How do you determine tonnage factor?

T = A x cf. For example, the projected area of the molded part is 150 sq/in times a clamp factor of 3 (tonnage needed/square inch from material data sheet). 150 x 3 = 450 tons needed. If you are running in a 500-ton press, try starting at 450 tons.

What is the tonnage of a ship?

tonnage, in shipping, the total number of tons registered or carried or the total carrying capacity. Deadweight tonnage is a measurement of total contents of a ship including cargo, fuel, crew, passengers, food, and water aside from boiler water. It is expressed in long tons of 2,240 pounds (1,016.0469088 kilograms).

What are the 3 types of mineral resources?

Minerals in general have been categorized into three classes’ fuel, metallic and non-metallic. Fuel minerals like coal, oil and natural gas have been given prime importance as they account for nearly 87\% of the value of mineral production whereas metallic and non-metallic constitutes 6 to 7\%.

What is assay value?

i. The quantity of an ore’s valuable constituents, determined by multiplying its assay grade or percentage of valuable constituents by its dimensions. The figure for precious metals is generally given in troy ounces per ton of ore, or per assay ton.