April 9, 2014
Every time I visit a mill I record and write up a report
that night. Following are my notes on the Golden Point battery near Macraes Flat, New Zealand:
We drove over to Macares Flat and found the 5-stamper, Kevin
Pearce and Helen
Jones who work for the
Department of Conservation, similar to the Forest Service in the States. We got
there at about 10:30 and they were in the middle of heating up the engine. The
engine is a kerosene engine that has to be heated up hot enough to make the
kerosene injection flash and run the engine. The engine is a Tangye Type, AA
oil engine. It took about 2 hours to
heat it up properly. The mill is a 5-stamper with a feeder that works. There
was also a shaker table that they had just restored back to operations. The
entire setup was original including the engine that the Department of
Conservation restored back to operations. This cost them $30,000 to complete. I
was a little disappointed that the stamps were not dropped, but at least I got
some good still pictures and video for my files.
There is a 5 minute You Tube video that I have and will put
it in this file of the engine and stamps being dropped. Just click on the address blow and paste into
the Internet and it will play.
The picture above shows the stamper battery with the screen
removed, exposing the stamper shoes. You can see the middle 3 shoes have fallen
off their bosses. That is one of the reasons why we did not drop the stamps
today. The picture below shows Kevin removing material from the mercury slots. This
sluice table is unlike anything in the States, since it has grooves across the table
in about one foot intervals. He uses a special spoon to get down into the slots
to remove the concentrates.
The picture above shows the engine warming up and all of the
smoke from the kerosene pre-heater. The large container on top of the engine is
the fuel tank. The picture also shows the many engine controls on the side towards
the back of the cylinder. The picture below shows you the kerosene pre-heater
fire inside the shroud. This took 2 hours to warm the engine cylinder enough to
start the engine.
Kevin showed me some original tools including a key, and two
tools for removing shoes and tappets.
Kevin set the 5 stamps on jackstands using a chain fall. This
was done since they could not drop the stamps since three of the shoes had
fallen off the stamps. Setting the stamps on the jackstands is a typical operation
performed on the stamper batteries.
The feeder device on this machine still works. The feeders
are very important since they control the level of material in the mortar
boxes. If you do not feed enough the stamps will damage the mortar box by the
metal on metal action between the stamps and the dies in the mortar box. If you
feed too much material you do not get proper crushing action, so it is very
important to maintain the correct feed rates. The feeder does this very
effectively. The picture below shows the feeder friction wheel.
There were
several parts to a Huntington Mill in the area. It had been re-assembled to
show what it looked like originally. The quartz mill crusher was driven with a
pelton wheel.
We went
into the town of Macraes Flat
and found a 3-stamper that was in pretty good shape. It was made by A & C
Price, Thames, NZ, 1896. It did not have a
feeder and there was no driver in sight.
|
No comments:
Post a Comment