Volume 24 (1872) (424 pages)

Soi on Arve Net cer) 7 Me PN JiLrusTRATED JOURNAL OF SCIENTIFIC AND ‘ ee a 5 Arts and BY DEWEY & COoO., Patont Sullcltors, . , ae ( a fk rd ba Lechanre ‘2) ‘neentions, SAN FRANCISCO, SATURDAY, APRIL 13, 1872. VOLUME XXIV. WNumber 15. Improved Furnace for Roasting and Chloridizing Crushed Ores in Bulk. Onr illustration represents a sectional view of an improved furnace for roasting nictallio ores to be nsed in connection with an improved proccess for so doing, hy the same inventor. The peculiarity of the invention consists in opening passages for the cirenlation of the heat and gascsneeded in the reduction and purification of metallie ores, throughout a mass of pulyerized ore,in the reducing chamber of a furnace, to facilitate and insnro its epeody desulphurization and reduction. In roasting pulverized ores, heretofore, difficulty has heen experienced from the fact, that owing to tho fineness of the particles, tho ore when in mass packs 80 Sar closely as to Q Hu Hy prevent a aa draught and hs init passage of heat; ce and of the reducing gases through the eame. To obyiate this difficulty various expedients have heen resorted to, sueh as moulding the ore into hricke or halls,preparatory to suhmitting the tat ta same to the acSe tion of the fire; Ay sifting the ore ie Laue eta i sa ae co Ma i A a A uunatt i Ht ti Li “és Hy i i Hy AT lira hy ih Ih Hing lTtn pa tte ee yl ti MAH THE MAT iH . C, fastened toa frame work, above the fnrnace. They are secnred in position en tep hy light hoop iron guides, GG, on the side eo that the whole can he lifted np in one piece when the poles are to he removed. To prepare the furnace fora charge of ord, the first step is to place the wooden rods in an upright position, the lower ends being in the holes in the tiles and the upper secured by the guides. When the rods are all in, tho side doors, D, are closed, and the furnace is ready for work. The tiles, 6, of the floor are laid on fire-brick set on edge, # FE, and they in tnrn are eet on the fire-arch. On each side of each = Sa Le ed eos Se=s=s=525225 guides removed, the poles drawn and the fire started. The wet pulvorized ore is of euch consistency that it packs clesely in the chamher above tho upright reds and will not crnmhle. When the rods are withdrawn and the fire started it penetrates through the passagce left by their withdrawal, reaches the straw or fibrous material, speedily consuming it, and opening thousand of new passagee for the flame, heat and gas, This produces an exceedingly porous condition in the mass which is favorable to the epeedy and effective action of the agents for its decomposition and reduction. The proportion of straw which is found ATUL aA ERI EL . i ls one set of guides and polos will answer fer all. The furnace is ee cheap as to he within the reach of all, and can bo builtin any locality with materials always at hand, as with careful usage common brick will do instead of fire-hrick. No power is required and any mason can erect it. This precess is now in no sense an experiment, it having been thoroughly and practically tested heth in Northern Nevada and Colorado. It was tried alsofor some time at the mines in Nerth Carolina, and is said to have worked well. Parties wishing further information concerning it can addrese the inventor, I. W. Croshy, Georgetown, Colorado, or Messrs. Taft and Smeeton, Ophir City, U. T. Col.«C. §. Drew, 728 Howard St., in this city, is agent for California. EAsTERNn SENSATIONALISM, — Our Eastern eotem peraries are cirenlating nunwarranted reports with regard to the late Inyo earthquakes, such as leave the impression on distantreaders that the entire State was severely shaken, when the fact wae through c¢nrrents of flame and gases, etc., all of which have proveu to be tedious and expensive in their nature. The object seught for in this invention is to provide a simple, cheap and effective method of roasting and chloridizing gold and silver ores in bulk, and is specially designed for ores, slimes and tailings that have been wet crushed. ‘I'o effect this by any other means now in vogue requires that the ore shall he firet dried and re-pulverized, an expense that few ores of that class can hear, The furnace, as the cut shows, is substantially a large rectangular ore chamber with ordinary fireplaces underneath, the fines, A A, from which lead directly under the fleor of the chamber containing the ore. This floor, B, is constructed of tiles shout six inches square, each one having a two-inch hole in its center so as to allow the heat and flames te pass from the fire helow to the ore chamber—above. A number of round wooden poles—two inches in diameter, to fit into the holes in the tiles of the floor, are made sufficiently long to permit their upper ends to extend CROSBY'S fire-arch are a series of flues, A A, which permit the heat and flame to pass up through the floor into the chamber ahove. The grate bars and doors are constructed in the ordinary manner. A staging is erected heside the furnace npon which is a floer, J, connecting it with the settling tanks, H, and providing a convenient place to charge the furnace. This, however, would he unnecessary when the furnace could he erected beside a hill. The ore is run into settling tanks at a convenient distance from-the furnace and then thrown on to the mixing floor. Chopped hay or straw or any hollow vegetahle matter (straw is preferable) cut into lengths of from two to three inches, is thoroughly mixed with the ore, with a proportion of salt according to the characof the ore. The furnace being prepared as above described, the mixed ore is sheyelled into the ore chamber so as to fill it nearly to the top. The charge is left as loose as possihle and no tamping done. The upper surface should he somewhut smoothed and levelled down, the IMPROVED FURNACE. to work the best is 20 to 30 pounds to the ton of ore; the amount of salt will vary, with silver ores, from one to three per cent.; in good ores of course no salt is used. The charge can be quite wet, hut is hest when hut little moister than molder’s sand. In silver ores the salt is hrought into direct ‘contact with the ore and # more perfect chlorination is reached with a much less quantity than by other methods. The cost of 2 20-ton furnace of this description will vary from $400 to $800, exclusive of the right of use, according to locality. The lining of the fire hoxes with the arch and floor of the chamher should be of fire hrick hut the rest of the furnace can be made of almost any kind of etone or common brick. No iron work is necessary except grate hars and doers and the light guideframes. The furnace may be made of almost any capacity, but experience has ehown that those capahle of treating from 20 to 30 tons of ore at a charge are the most convenient to operate. Where there are fwo or more fnrnaces near each other eorrectly telegraphed from this city that the eeverity of the “‘tremhlor” was confined to a comparatively limited region, in a distant and thinly peopled portion of the State. With the exception of a natural sympathy in behalf of the Inyo sufferers, who were intimately connected in business and personal relations with our citizens, no more thought was given the earthquake in this city, or indeed throughout nineteen-twentieths of the State than though it had occurred in South America. DETERrIoRaTIoN or Waeat Lanps.—Russia seems to he following in the footsteps of this country in the neglect of her wheat lands, and, as a consequence, cofaplainte are already being made that the average yield of her grain crops is constantly growing less. Itis said that there, as in California, valuahle farm yard manure is, in many places, being conducted to the nearest waste gronnd or stream as a nuisance. Still, Russia is huying largely of reaping and threshing machines, netwithstanding, as well as ether agricultural machiuery, on a large scale. Bustvess neglected is husiness loet,

Soi on Arve Net cer) 7 Me PN JiLrusTRATED JOURNAL OF SCIENTIFIC AND ‘ ee a 5 Arts and BY DEWEY & COoO., Patont Sullcltors, . , ae ( a fk rd ba Lechanre ‘2) ‘neentions, SAN FRANCISCO, SATURDAY, APRIL 13, 1872. VOLUME XXIV. WNumber 15. Improved Furnace for Roasting and Chloridizing Crushed Ores in Bulk. Onr illustration represents a sectional view of an improved furnace for roasting nictallio ores to be nsed in connection with an improved proccess for so doing, hy the same inventor. The peculiarity of the invention consists in opening passages for the cirenlation of the heat and gascsneeded in the reduction and purification of metallie ores, throughout a mass of pulyerized ore,in the reducing chamber of a furnace, to facilitate and insnro its epeody desulphurization and reduction. In roasting pulverized ores, heretofore, difficulty has heen experienced from the fact, that owing to tho fineness of the particles, tho ore when in mass packs 80 Sar closely as to Q Hu Hy prevent a aa draught and hs init passage of heat; ce and of the reducing gases through the eame. To obyiate this difficulty various expedients have heen resorted to, sueh as moulding the ore into hricke or halls,preparatory to suhmitting the tat ta same to the acSe tion of the fire; Ay sifting the ore ie Laue eta i sa ae co Ma i A a A uunatt i Ht ti Li “és Hy i i Hy AT lira hy ih Ih Hing lTtn pa tte ee yl ti MAH THE MAT iH . C, fastened toa frame work, above the fnrnace. They are secnred in position en tep hy light hoop iron guides, GG, on the side eo that the whole can he lifted np in one piece when the poles are to he removed. To prepare the furnace fora charge of ord, the first step is to place the wooden rods in an upright position, the lower ends being in the holes in the tiles and the upper secured by the guides. When the rods are all in, tho side doors, D, are closed, and the furnace is ready for work. The tiles, 6, of the floor are laid on fire-brick set on edge, # FE, and they in tnrn are eet on the fire-arch. On each side of each = Sa Le ed eos Se=s=s=525225 guides removed, the poles drawn and the fire started. The wet pulvorized ore is of euch consistency that it packs clesely in the chamher above tho upright reds and will not crnmhle. When the rods are withdrawn and the fire started it penetrates through the passagce left by their withdrawal, reaches the straw or fibrous material, speedily consuming it, and opening thousand of new passagee for the flame, heat and gas, This produces an exceedingly porous condition in the mass which is favorable to the epeedy and effective action of the agents for its decomposition and reduction. The proportion of straw which is found ATUL aA ERI EL . i ls one set of guides and polos will answer fer all. The furnace is ee cheap as to he within the reach of all, and can bo builtin any locality with materials always at hand, as with careful usage common brick will do instead of fire-hrick. No power is required and any mason can erect it. This precess is now in no sense an experiment, it having been thoroughly and practically tested heth in Northern Nevada and Colorado. It was tried alsofor some time at the mines in Nerth Carolina, and is said to have worked well. Parties wishing further information concerning it can addrese the inventor, I. W. Croshy, Georgetown, Colorado, or Messrs. Taft and Smeeton, Ophir City, U.

T. Col.«C. §. Drew, 728 Howard St., in this city, is agent for California. EAsTERNn SENSATIONALISM, — Our Eastern eotem peraries are cirenlating nunwarranted reports with regard to the late Inyo earthquakes, such as leave the impression on distantreaders that the entire State was severely shaken, when the fact wae through c¢nrrents of flame and gases, etc., all of which have proveu to be tedious and expensive in their nature. The object seught for in this invention is to provide a simple, cheap and effective method of roasting and chloridizing gold and silver ores in bulk, and is specially designed for ores, slimes and tailings that have been wet crushed. ‘I'o effect this by any other means now in vogue requires that the ore shall he firet dried and re-pulverized, an expense that few ores of that class can hear, The furnace, as the cut shows, is substantially a large rectangular ore chamber with ordinary fireplaces underneath, the fines, A A, from which lead directly under the fleor of the chamber containing the ore. This floor, B, is constructed of tiles shout six inches square, each one having a two-inch hole in its center so as to allow the heat and flames te pass from the fire helow to the ore chamber—above. A number of round wooden poles—two inches in diameter, to fit into the holes in the tiles of the floor, are made sufficiently long to permit their upper ends to extend CROSBY'S fire-arch are a series of flues, A A, which permit the heat and flame to pass up through the floor into the chamber ahove. The grate bars and doors are constructed in the ordinary manner. A staging is erected heside the furnace npon which is a floer, J, connecting it with the settling tanks, H, and providing a convenient place to charge the furnace. This, however, would he unnecessary when the furnace could he erected beside a hill. The ore is run into settling tanks at a convenient distance from-the furnace and then thrown on to the mixing floor. Chopped hay or straw or any hollow vegetahle matter (straw is preferable) cut into lengths of from two to three inches, is thoroughly mixed with the ore, with a proportion of salt according to the characof the ore. The furnace being prepared as above described, the mixed ore is sheyelled into the ore chamber so as to fill it nearly to the top. The charge is left as loose as possihle and no tamping done. The upper surface should he somewhut smoothed and levelled down, the IMPROVED FURNACE. to work the best is 20 to 30 pounds to the ton of ore; the amount of salt will vary, with silver ores, from one to three per cent.; in good ores of course no salt is used. The charge can be quite wet, hut is hest when hut little moister than molder’s sand. In silver ores the salt is hrought into direct ‘contact with the ore and # more perfect chlorination is reached with a much less quantity than by other methods. The cost of 2 20-ton furnace of this description will vary from $400 to $800, exclusive of the right of use, according to locality. The lining of the fire hoxes with the arch and floor of the chamher should be of fire hrick hut the rest of the furnace can be made of almost any kind of etone or common brick. No iron work is necessary except grate hars and doers and the light guideframes. The furnace may be made of almost any capacity, but experience has ehown that those capahle of treating from 20 to 30 tons of ore at a charge are the most convenient to operate. Where there are fwo or more fnrnaces near each other eorrectly telegraphed from this city that the eeverity of the “‘tremhlor” was confined to a comparatively limited region, in a distant and thinly peopled portion of the State. With the exception of a natural sympathy in behalf of the Inyo sufferers, who were intimately connected in business and personal relations with our citizens, no more thought was given the earthquake in this city, or indeed throughout nineteen-twentieths of the State than though it had occurred in South America. DETERrIoRaTIoN or Waeat Lanps.—Russia seems to he following in the footsteps of this country in the neglect of her wheat lands, and, as a consequence, cofaplainte are already being made that the average yield of her grain crops is constantly growing less. Itis said that there, as in California, valuahle farm yard manure is, in many places, being conducted to the nearest waste gronnd or stream as a nuisance. Still, Russia is huying largely of reaping and threshing machines, netwithstanding, as well as ether agricultural machiuery, on a large scale. Bustvess neglected is husiness loet,