Overview

The jaw crusher has been a staple of the hardrock mining industry since its invention. It is used as a primary crusher for all types of ores. The jaw typically takes the larger run of mine product and produces a sized discharge for feed to a secondary crusher such as a cone crusher, ball mill, or hammer mill. We have sold our jaw crushers to many different industries over the years, but the hard rock mining industry is still the #1 purchaser of our jaw crushers and other equipment such as turn-key ore processors.

The hammer mill takes the <3/4″ discharge from the jaw crusher and pulverizes it to liberate the values in the ore (usually gold), and is a component of our turn-key ore processor. The size of the powder from the hammer mill is controlled by the size of the openings in the screen, and the discharge is processed on the shaker table. If additional size reduction is needed for the shaker table tailings, those can be classified with a spiral classifier, and the oversized discharge returned to the hammer mill for additional grinding.

When concentrating gold ore, our shaker table will get a high percentage of the free gold >325 mesh, even down to less than 400 mesh, equaling or out­-performing any table on the market. The shaker table is a component of our turnkey ore processor and it makes quite clean cuts of <16 mesh slurry between the free gold, sulfides and tailings. The operator can sell the free gold and send the sulfides to the refiner if they contain additional values.

The spiral classifier separates the shaker table tailings into fine and coarse fractions. The coarse material is directed back to the grinding circuit to liberate more values, and the fine material is directed to the waste settling pond. The classifier works as follows: the slurry flows into the basin at the bottom, which is a settling pond. The larger, heavy material settles to the bottom of the pool, to be augered up the incline by the screw. The finer material in the tank does not have a chance to settle and is discharged out of the side of the pool from one of several ports. By varying the incoming slurry density and volume, and adjusting the height of the water level in the pool, the incoming slurry is classified into fine (as fine as 150 mesh) and coarse fractions. This is useful in ore milling, since finely ground ore is barren of values and must be separated and directed to the waste pond. The coarse material is separated from the fine material and is returned to the grinding circuit to liberate additional values.

The spiral classifier is also useful as a simple dewatering device when water is in short supply. When the water level in the classifier basin is high, only the very finest of material is discharged from the tank, and the maximum amount of material is augered up the incline, draining the water as it climbs to the upper discharge point.

The MBMMLLC turn-key ore processor is made up of several modules and provides the operator with a reasonably priced, automated system to recover values with little operator involvement. The ore is loaded at the front end with a bucket and the gold and values­-bearing sulfides are recovered off the shaker table. These are offered in 1, 2 and 4 ton/hr models.

 

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Turn-Key Ore Processor

For the small scale miner, these are the most cost effective, industrial grade processors available for continuous operation. The jaw crusher, hammer mill and fine gold shaker table form the heart of the processor

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The owners have been very helpful and have always taken the time to answer our questions and advise us on how best to make the most efficient and productive use of their equipment. We are very satisfied with the products and services that we have gotten from Mount Baker Mining and Metals...

— Bill Stiles III (Washington, USA)

Why MBMM?

  • Made in the USA
  • Used worldwide
  • Precision Results

Contact us with questions or any project needs.