Milling / Screening


The jaw crusher reduces the slag as it passes through the crushing plates.  Feeding action is moving the material through the crusher.  The cheek plates reduce material instantly, most of it to ½” spec size.  Feeding action is moving the material from a hopper to the crusher.


Just Refiners USA, Inc. uses a Universal #2 Jaw Crusher with an approximate opening of 8” X 10” and 21” long cheek plates.


In processing materials such as slags, crucibles, furnace linings, etc. the gold and silver minerals must be released from the surrounding host before the gold and silver minerals can be captured during the sampling process.


Milling: Particular care is taken when processing furnace linings, graphite crucibles and borax slag containing metallic gold and silver.  Not only do we homogenize the by-product materials by crushing to reduce the particle size to less than 10 mm (1/2 inch) in size for sampling purposes, we proceed to feed the crushed materials through a rubber lined, vibratory, ball mill.  We reduce the material size to less than minus 60 mesh. All of the material are screened through a Sweco vibratory screen, separating the metallic oversize from the milled material.  The metallic oversize is melted in the JRI induction furnaces.


Just Refiners has the capacity to crush 10 tons of borax slag to minus half inch per day. Each batch of slag is weighed before sampling.  The mine, or a representative of the mine is present during weigh-in and sampling.  After crushing the entire lot of borax slag, it is passed through a 3 tier riffle splitter to obtain a representative sample for evaluation purposes.  The customer receives a sealed sample to have their materials analyzed independently.

Bobby Boekhoud
Beve Boekhoud
Carmen Arbizo
Marco Barragan
Logan Zimmerman
Kim Walker