sluice box उदाहरण वाक्य

A single shipment of gold in 1866, representing a short run of gold bearing gravel through the sluice boxes weighed two tons and was valued at $ 900, 000.00.
Larger commercial placer mining operations employ screening plants, or trommels, to remove the larger alluvial materials such as boulders and gravel, before concentrating the remainder in a sluice box or jig plant.
Reeves interrupted the conversation to refer a customer to another store, because he had only one $ 100 sluice box, which is used to wash earth and gravel away from the heavier gold.
There are also displays of old " treasure boxes " that held gold nuggets, old saddles and horse rigs, gold pans and sluice boxes, bank notes and ledgers that toted up the miners'bounty.
The internal mechanics were not very sophisticated they duplicated, on a larger scale, many of the devices used by placer mining throughout the gold rush, such as the gold pan and the sluice box.

Sluice boxes can be as short as a few feet, or more than ten feet ( a common term for one that is over six feet + /-is a " Long Tom " ).
In college, Chris met another folk musician, banjo player, Steve Elliott, and they later formed a bluegrass band, The Granite Mountain Sluice Box Boys named after a local landmark and played College venues and parties.
At the claim about a mile from their home they showed off a sluice box that after a week of operations contained up to $ 40, 000 worth of gold, mixed with a lot of dirt and gravel.
The same principle may be employed on a larger scale by constructing a short sluice box, with barriers along the bottom called riffles to trap the heavier gold particles as water washes them and the other material along the box.
Once it is clear that the volume of gold-bearing sediment is larger than a few cubic metres, the placer miners will build rockers or sluice boxes, with which a small group can wash gold from the sediment many times faster than using gold pans.