Gr Sprenger Engineering Case Histories

Case History: Drilling Mud Slurry Sampler [Sprenger Continuous Solids Sampler]

Problem: High Abrasion, Slurry Sampling

BHP Copper operates a mining operation in southern Arizona. A drilling rig is used to collect samples which are used to direct mining operations and planning. The drilling mud must be sampled for every 20 feet of sample boring. The drilling mud has a wide particle size range and is abrasive.

Solution:
A Sprenger Continuous Solids Sampler, designed for slurry service, with AR 500 steel wear components and sample collection chutes, was installed in the drilling mud slurry line. All of the material flowing from the drill rig passes through the sampler. The sampler inlet is 200 gallons per minute of drilling mud. A continuous 0. 13% representative cut of the slurry (5.2 gallons every 20 minutes) is delivered to the sample receiver. This sampler was delivered to the mine in 1998 and continues to operate well.

Case History:
Molybdenum Slurry Sampler

Problem:
High Abrasion, Ball Mill Slurry Sampling

Climax Molybdenum Company operates a large-scale molybdenum mill near Parshall, Colorado. Molybdenum ore is received via rail from Empire, CO and milled in ball mills. The ball mill product is a slurry of finely ground ore which is then purified in down-stream processing operations. Collecting a representative sample of mill slurry has been a continuing problem due to the large flow volume (1,500 gpm), the abrasive nature of the slurry and presence of small amounts of trash material.

Solution:
A Sprenger Continuous Solids Sampler, specially designed for slurry service, with ceramic wear components and sample collection probes, was installed in the mill product slurry line. All of the material flowing from the mill passes through the sampler. The sampler takes a continuous 30 gpm, representative cut of the slurry which is then delivered to a secondary splitting device. This sampler was delivered to the mill in late 1997 and continues to operate well.