Skip to main content
Hide Articles List

19 articles on this Page


[No title]




[No title]







BRONFLOYD. The following is from the Mi ning Journal Dear Sir,-Permit me a small space in your Jour- nal to thank your Birmingham correspondent (whose letter appeared in your last issue,) for the compliment therein expressed but in so doing to admit that personally I should much prefer, instead of these oft- repeated confidences, that he and other members of the Bronfloyd Company-whirb is certainly leading the van in the improvements oflead dressing—would attend some of the meetings on the Mine, and inspect the change (as compared with eighteen months back) which Bronfloyd now presents rather than view everything, with so much confidence, through what may perchance, prove to be my I-rose-coloured spectacles." An especially good opportunity will present itself for this at the Annual General Meeting which is proposed to be held on the mine on Tuesday, the 23rd proximo and, Sir, I may then ask you to allow one of the intelligent and scientific staff of your Journal to favor me with an independent critique on our works; as by that time, barring bad weather-I hope to have the re arrangement of Bronfloyd floors complete, the Steam engine No. 3 Shaft will also be at work, that shaft sunk to the 100, the new 24-ft. water-wheel on the north side of the floors driving three quarters of a mile of Hodgon's Patent Wire Tramway with its suspended buckets of dressed-ore traversing from the floors of the mine over a nearly level piece of ground to a new storehouse near to the village of Penrhyncoch, and also driving two of Dingey'# Patent Pulverizers, and reducing to fine powder the daily accumulation of lead Skimpings or Raggings, hitherto thrown away. The following is a copy of one of many Assays of these Raggings — Callington, July, 1871. "Sample Lead Ore Skimpings from Bronfloyd contains 3:1 per cent. of Pig Lead. "JOHN JENKIN." The Bronfloyd ore is disseminated in fine strings through a very wide lode (nearly 40 ft ) from 25to 30 tons of this lode-stuff is operated upon daity by Blake's Stone Breaker, and by a pair of 38-inch and another pair of 24-inch Crushers, from which most of it passes into the German Jiggers, and by this improved appliance, say, four tons of clean lead ore is separated and finally cleansed by the flat buddies -the remainder known as "Skimpings," consist of cnbes of lode-stuff varying from one-sixteenth to one-eighth of an inch, in which is imbedded minute particles, more or less, of lead ore. This mass of stuff has hitherto been thrown away :-our arrangements hereafter will carry this waste by a natural fall through six-inch pipes a distance of say 65 feet into the Pulverizer house, and be operated upon by the newly-patented machine just referred to. The Western Chronicle of Science says of this machine It has long been a question with all Tinners as to the best means of reducing tin stuff (called rows') to such a degree of fineness as to extract the tin as completely as possible. The usual plan of stomping the rows' a second and perhaps a third time is tedious, requires pondprous machinery, and a great amount of power to produce little effect:—this machine, it says GRINDS THE Rows.' A public trial at Wheal Jane, in Cornwall, was made 27th February last, when it is reported to have reduced to great fineness hard tin-rows stuff at the rate of 9 tons in 12 hours Mr Matthew Loam. C E., of Liskeard had the machine tried (as reported to me) on Lead Skimpings from West Chiverton, which was ground at the rate of 15 cwts. per hour to a very fine and uniform size. The two machines we are about erecting at Bron- floyd will, it is assumed, reduce all the lead Skimp- ings made on the mine without any manual labour so reduced it will flow from the Pulverizer house into, and pass through (like our other slime ores) a spi/fcial set of brick-encased pits, with carefully constructed coke screens and I shall be disappointed if my Company does not in result reap something like five tons of marketable and rich silver-lead ore per week, from these Raggings, at a mere minimum of extra cost. Not being accustomed to sail under false colors I must beg leave to refer to your correspondent's figures to say, that the value of our improved process of lead-dressing, so far, will not bear quite so favourably as the averages shewn by hini-sin his late letter :-the seven sales of Bronfloyd for 1870 are given correctly and the average is 13[. 6s. Od. per ton but the nearest corresponding dates of sallit by the Van Company should be as follows Feb. 24. 15 6 July 19, 1870, at fl2 12 6 Mar.24, 13 14 0 Aug. 18, „ 14 4 0 May 19, 18 5 0 Sept. 29, 12 16 0 Dec. 29, 1870, at £ 12 4 ) the average of which is X13 4s. 6d. not £ 13 7s. 3d -Thus the real advantage in our mode of dressing, as evidenced by the sale of Bronfloyd on the 24th ultimo at 413 6s Od and the average sale by the Van Compauy on the 30th ultimo at £ 12 10s. 3d would appear to be 15s. 9d. per ton and from that, sum should be deducted Is. 6d per ton, the difference on the 1870 averages, not plus Is. 3d per ton as given by your correspondent.—Yours faithfully, J. B BALCOMUE, Bryn-y-mor, Aberystwyth Managing Director. 20th Dec. 1871.





[No title]

[No title]