|
| Fahrenheit (F) |
| |
The temperature scale in which water freezes at 32 degrees F and boils at 212 degrees F under normal atmospheric conditions. °F = (°C x 1.8) + 32.
|
|
| Fan pitch |
| |
The angle of the fan blades measured one-third of the fan radius in from the tip.
|
|
| Fans, variable-speed |
| |
Fans whose motors turn at infinitely variable speeds by varying the line frequency of the power source.
|
|
| Feasibility study |
| |
The financial or economic evaluation of the entire costs of building, putting a mine into production and whether the mine can make a profit at current/future mineral prices.
|
|
| Feldspar |
| |
A crystalline mineral consisting of aluminum silicates and other elements that is an essential ingredient for the ceramics industry, and also is used in the glass and paint industries.
|
|
| Ferrous |
| |
Adjective used to indicate the presence of iron.
|
|
| Fill |
| |
Material put back in place of extracted ore to provide ground support.
|
|
| Filter |
| |
A device whose primary function is the retention by a porous media of insoluble contaminants from a fluid.
|
|
| Fineness |
| |
Content of gold expressed in parts per thousand.
|
|
| Fire damp |
| |
Flammable gas found in mines created by decomposition of coal or other carbonaceous matter. Often refers to methane gas which is explosive at concentrations between 5% and 15%.
|
|
| Fissile |
| |
Ability to split or remove in sheets. Slate and mica are examples.
|
|
| Fixed assets |
| |
Buildings, machinery and land which are unlikely to be converted to cash during the normal business cycle.
|
|
| Flight |
| |
Metal crossbar attached to the chain of a drag chain or flight conveyor.
|
|
| Flotation |
| |
Milling process that uses bubbles to capture valuable minerals particles that float to the surface, thereby separating them from waste which sinks to the bottom.
|
|
| Flow control valve |
| |
A valve which controls the rate of oil flow.
|
|
| Flow rate |
| |
The volume, mass, or weight of a fluid passing through any conductor per unit of time.
|
|
| Fluid |
| |
1. A liquid or gas.
2. A liquid that is specially compounded for use as a power-transmitting medium in a hydraulic
system.
|
|
| Flume |
| |
A trough used to convey water.
|
|
| Follow valve |
| |
A control valve which ports oil to an actuator so the resulting output motion is proportional to the input motion to the valve.
|
|
| Foot (ft) |
| |
A linear unit of length equal to 12 inches or a third of a yard (0.3048 m).
|
|
| FOPS |
| |
Falling object protective structure.
|
|
| Force |
| |
Any push or pull measured in units of weight. In hydraulics, total force is expressed by the product P (force per unit area) and the area of the surface on which the pressure acts. F = P x A.
|
|
| Four-way valve |
| |
A directional valve having four flow paths.
|
|
| FPM |
| |
Feet per minute.
|
|
| Free gold |
| |
Small particles (gold dust) or even nuggets, which are usually found on riverbeds or close to the surface when erosion or weathering has exposed deposits.
|
|
| Free milling |
| |
Used to describe recovery of gold or silver from ore using only concentrating methods (crushing, gravity separation or amalgamation).
|
|
| Frequency |
| |
1. The number of cycles per second of alternating current (example: 60 cycles per second or 60
hertz per second).
2. The number of times an action occurs in a unit of time. Frequency is the basis of all sound.
A pump or motor's basic frequency is equal to its speed in revolutions per second multiplied
by the number of pumping chambers.
|
|
| Friable |
| |
Easy to break or crumbling naturally.
|
|
| Front connected |
| |
A condition wherein piping connections are on normally exposed surfaces of hydraulic components.
|
|
| Full flow |
| |
In a filter, the condition where all the fluid must pass through the filter element or medium.
|
|
| Furnace |
| |
Equipment for roasting or smelting ores.
|
|
| Fuse |
| |
Cord shaped substance that is entrained with black powder that when lit, burns along the cord at a set rate. Used in the ignition of explosives.
|
