Vanning

~ -- Under this head are classed the method of assaying tin ores, known as vanning, and the amalgamation assay for gold. ❋ Cornelius Beringer (1886)

The process of assaying tin ores adopted in the mines of Cornwall is a mechanical one known as "vanning," the object of which is to find the percentage of "black tin," which, it is well to remember, is not pure cassiterite, much less pure oxide of tin. ❋ Cornelius Beringer (1886)

Me, I just returned with my not fat 81-year-old body from six months camper vanning through Europe, walking a few miles every day. ❋ Unknown (2007)

Buckle up and check out these photo links for a glimpse into the world of Japanese vanning. ❋ Unknown (2007)

See, the thing is, I was planning to bring my laptop vanning with me this week. ❋ Fulfilled (2003)

Tin, 271 _See also Black tin_ assay for, by vanning, 273 copper in, 204 ❋ Cornelius Beringer (1886)

Black tin, 271 an analysis of, 287 assay of, 276 copper in, 204 examination of, 285 separation by vanning, 272 ❋ Cornelius Beringer (1886)

The difficulty which beginners find in obtaining satisfactory results, and any loss of metal which those not accustomed to the process may incur, will invariably occur in the vanning of the powdered slag for the fine tin, the rest of the operations being easy of execution, and requiring only the ordinary care necessary for all metallurgical work. ❋ Cornelius Beringer (1886)

For the following information, as well as for much of that already given about vanning, we are indebted to ❋ Cornelius Beringer (1886)

As already pointed out, the object of vanning is to determine the proportion of black tin in the lode stuff. ❋ Cornelius Beringer (1886)

If the ore to be operated on does not contain this quantity of metal, then the sample (if coarse) must be reduced to a fine state, the gangue being removed by vanning, and the ore saved for the fire assay. ❋ Cornelius Beringer (1886)

The vanning results were obtained by a Cornish vanner of recognised ability, and the wet assays by two London firms of the highest standing: -- ❋ Cornelius Beringer (1886)

The weighed portion of the ore is placed on the vanning shovel. ❋ Cornelius Beringer (1886)

The relation between the actual content in oxide of tin and the produce got by vanning has been tested on several occasions with results which show a fair degree of approximation. ❋ Cornelius Beringer (1886)

Revenues from satellite wagering fund several racing-related programs, including off-site stabling and vanning in each half of the state. ❋ By (2010)

It's far harder to justify to owners staying at Churchill Downs - and paying $7 a day per horse in stall rent, plus the cost of vanning horses to races - for the summer.

When gold occurs in particles of any size, it is readily detected by its appearance, but when finely disseminated through a large quantity of rock, it is separated and detected by the amalgamation assay -- described below -- or by a process of washing somewhat similar to vanning, or by the following test: -- Powder and, if necessary, roast 50 to 100 grams of the ore, put on it three or four crystals of iodine and enough alcohol to cover it; allow to stand for half an hour; a piece of filter paper moistened with the liquid and burnt leaves an ash with a distinctly purple tint if any gold is present. ❋ Cornelius Beringer (1886)

There is no doubt that if low percentage ores containing silica are assayed in this manner, low results are obtained, as it is impossible to reduce the whole of the tin in the presence of free silica; with this class of ores, care should be taken to remove some of the silica by preliminary vanning, or some flux should be added which will combine with the silica, and so prevent its entering into combination with the tin. ❋ Cornelius Beringer (1886)

It is quickly performed; with ores of good quality it gives results not to be excelled by any other process; and it gives the smelter the actual alloy and quality of metal he may expect to get in the smelting of the ore, which no other mode of assaying will do: against which may be set the skill required to obtain accurate results with the vanning shovel; the loss of metal in poor ores containing an excess of silica; and the high results from ores containing a large quantity of metallic impurities. ❋ Cornelius Beringer (1886)

The water-box for vanning in should be at least 4 feet long, 2 feet 6 inches wide, and 8 inches deep. " ❋ Cornelius Beringer (1886)