New Reverse Circulation kit for Atlas Copco’s DM45

2014 Jan 08

Atlas Copco has expanded the capabilities of its DM45/50 and DML blasthole drill rigs with a new reverse circulation (RC) kit.

The new RC kit for DM and DML drill rigs has been designed to meet demands for increased flexibility, enabling these drills to be used for in-pit grade control as well as blasthole drilling.

Based on proven systems, components, and technology, the optional RC kit  includes a cyclone arm for sampling from the ground or platform level, which can be vertically raised or lowered. A cyclone rotation of 160 degrees provides safe access for cleaning, maintenance, and attaching new sample hoses from ground level.

Cyclone RC KitThe cyclone is a heavy duty system featuring a hydraulic upper knife valve and pneumatic lower knife valve for collecting and isolating the sample. It has a hydraulic hinge between the dump box and the cone splitter that allows for easy cleaning and a fixed cone splitter with primary and duplicate sample chutes. All cyclone and sample functions are easily controlled from the operator’s cab.

A 66 liter dump box, with a steep cone for limiting sample hang up is part of the sample collection feature, and the primary and duplicate ports can easily be adjusted from 4–15%. Other components include a blast box/discharge, a blow-down valve that offers internal valving (does not require external 3–way valving or hosing above or around the rotation head), an overhead dual swivel, and a fully integrated sample hose management system.

DM45 and DML reverse circulation drill rigs offer hole diameters ranging from 114 mm to 146 mm (4½–5¾”) and have carousels for four 4.5 inch drill pipes, giving maximum hole depths of 44 m (145 ft).

The kit can also be retrofitted on rigs currentl­y in the field.

Epiroc operated under the trademark “Atlas Copco” prior to January 1, 2018.