C&D Waste

Rockster’s DUPLEX System as Ideal Solution for Processing Lead Ore

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The Rockster Jaw Crusher R800 crushes lead ore in Chunya to a size of 0-40 mm using screenbox and return belt

The P.B. Mining Company in Tanzania chose the “2-in-1” machine for crushing this highly abrasive rock.

The P.B. MINING COMPANY LTD was founded in 2014 and is specialized in the excavation of lead glance also named Galena. Galena is the natural mineral form of lead sulfide. It is the most important ore of lead and usually contains about 1–2% silver, a byproduct that far outweighs the main lead ore in revenue. Because of its low melting point, it is easily separated through smelting.

The mining company has many different sites in the Mbeya Region in the United Republic of Tanzania, working in a territory of about 80 square kilometers. Exploration works are carried out by excavation as well as using vertical and inclined directional drilling, driving of trenches as well as vertical and inclined holes.

Machine operator Markus Silly, CEO Oskar Preinig and Customer Relations Wolfgang Tischler in front of their new R1000 impact crusher.

Excavation and Crushing of Valuable Rock

One of the sites is located near Chunya (Mbeya Region, Tanzania), and it went into operation in May 2017. It all started by excavating the upper layers of the soil and taking out the first samples of ore for analysis. After positive results of the geological tests the extraction could begin.

In this situation, the Rockster R800 jaw crusher is needed to crush the Galena to 0-40 mm. Screenbox RS83 and return belt RB75 that came with the crushing plant are a must when it comes to production of precisely defined final product. After the change of the crushing chambers, from jaw to impact, the R900 impact crusher continues to crush previously obtained 0-40mm material down to 0-5 mm. This end material is sent to a leaching company to separate the pure ore which is then used to produce concentrates based on polymetallic ores.

Efficient processing with the R1000S crusher – GK processes an average of 230 tons of C&D waste per hour, producing a clean 0/63mm (minus 2 ½ inch) end product.

With the DUPLEX-System you save wear, transport costs and investment for another crusher

Rockster rep Maksim Perminov commissioned the machine and did the training and hand-over in Tanzania. He says: “After finding out the requirements of the P.B. Mining Company I was sure that the Rockster Duplex-System would be the best solution to produce the final material quality they need with the lowest costs possible. The uniformity of the ore mass is very important for them. Since Galena rock has a very high abrasiveness, it requires a primary crushing on the jaw crusher to reduce the wear of blow bars when working on a rotary crusher.”

The P.B. Mining Company is highly satisfied with their “2-in-1” crushing plant. It is simply the right system for the production of the 0-5mm final product without the need to purchase, maintain and transport 2 separate crushers. By using the jaw as primary crusher they save on wear and maintenance costs. The secondary impact crusher guarantees the best product shape and quality so that they can finally crush their Galena rock in the most cost-efficient way.