Method of and device for the removal of burden samples

摘要

To remove burden samples from a furnace shaft, a tubular lance containing a sampler displaceable relative to the lance, is inserted into the shaft so that the inner end of the lance is spaced at a maximum distance inwardly from the inside surface of the shaft. The lance is withdrawn from the shaft relative to the sampler and the sampler takes samples representative of a cross-section of the furnace burden between the point of maximum distance inwardly from the shaft to the inside surface of the shaft.