A glossary of mining and metallurgical terms
A glossary of mining and metallurgical terms
A glossary of mining and metallurgical terms
You also want an ePaper? Increase the reach of your titles
YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.
A GLOSSARY OF MINING AND METALLURGICAL TERMS. 71<br />
chiefly <strong>of</strong> metallic sulphides. In this sense it is synonymous with<br />
matt, or the Germ. Stein. Antimony regidns is metallic antimony.<br />
Rencl-roch. See Explosives.<br />
Renk, Newc. The average distance coal is brough by the putter.'^.<br />
RrMs. The arrangement at the top <strong>and</strong> bottom <strong>of</strong> a pit for sup-<br />
porting the shaft-cage while changing the tubs or cars.<br />
Retorting. Removing the mercury from an amalgam by volatil-<br />
izing it in an iron retort, conducting it away, <strong>and</strong> condensing it.<br />
Reverberatory furnace. A furnace in whicii ores are submitted to<br />
the action <strong>of</strong> flame, without contact with the fuel. The flame enters<br />
from the side or end, passes upward over a low wall or bridge, strikes<br />
the ro<strong>of</strong> {arch) <strong>of</strong> the furnace, <strong>and</strong> is reverberated downward upon<br />
the charge.<br />
Reversing rolh. See Three-high train.<br />
Rib. 1. In coal <strong>mining</strong>, the solid coal on the side <strong>of</strong> a gallery or<br />
long wall face; a pillar or barrier <strong>of</strong> coal left for support. 2. The<br />
solid ore <strong>of</strong> a vein ; an elongated pillar left to support the hanging-<br />
wall, in working out a vein.<br />
Ribbed. Containing bone.<br />
Ribbon-borer. A boring-tool consisting <strong>of</strong> a twisted flat steel<br />
blade.<br />
Rich, Penn. An open heap or pile in which coal is coked.<br />
Riddle, Corn, <strong>and</strong> Scot. A sieve. The large pieces <strong>of</strong> ore <strong>and</strong><br />
rock picked out by h<strong>and</strong> are called knockings. The riddlings remain<br />
on the riddle; the /W/ goes through.<br />
Rider. See Morse.<br />
Riffle. A groove or interstice, or a cleat or block so placed as to<br />
produce the same effect, in the bottom <strong>of</strong> a sluice, to catch free gold.<br />
Rim-rock. The bed-rock rising to form the boundary <strong>of</strong> a placer<br />
or gravel deposit.<br />
Ring, Kewc. A gutter cut around a shaft to catch <strong>and</strong> conduct<br />
away the water.<br />
Ringe. See Cowl.<br />
Rise or Riser, Corn. A shaft or winze excavated upward.<br />
Rise-heading. See Heading, in long-urdl.<br />
Rivelaine. A pick with one or two points, formed <strong>of</strong> flat iron,<br />
used to undercut coal by scraping instead <strong>of</strong> striking.<br />
Roa.^ting. Calcination, usually with o.xidation. Good, dead, or<br />
sweet roasting is complete roasting, /. e., carried on until sulj)hurous<br />
<strong>and</strong> arsenious fumes cease to be given <strong>of</strong>f. Kernel-roasting is a pro-<br />
cess <strong>of</strong> treating poor sulphuretted copper ores, by roasting in lumps,