US250544A - johnson - Google Patents

Description

(No Model.) 2 Sheets-Sheet 1.

P. G. JOHNSON.

ORE SEPARATOR.

INVENTOR SSBS N. PETERS PholuLilhvgmphflr. Washington. D. c.

ORE SEPA-RATOR.

- Patented Dec. 6,1881.

N. PETERS. Pholo-Lv'moguphw, Wahinglon, o. c.

UNITE STATES PATENT Fries.

FRANK G. JOHNSON, OF BROOKLYN, NEW YORK. i

ORE-SEPARATO R.

SPEGIFI GATTON forming part of Letters Patent No. 250,544, dated December 6, 1881. Application filed August 19, 1881. (No model.)

To all whom it may concern:

Be it known that I, FRANK G. J OHNSON, a citizen of the United States, residing in the city of Brooklyn, in the county of Kings and State of New York, have invented new and useful Improvements in Ore-Separators, of which the following is a specification, reference being had to the accompanying drawings.

Myinvention relates to that class of machines for separating ores known as dry separators.

The general plan upon which my device is constructed and the principles upon which it operates are such as to submit the properly pulverized ores to a process of tumbling and at the same time to the action of two separate currents or blasts of air, the one blast being made to act over the surface of the pulverized ores, while the other blast acts from beneath the bed on which the ores are being tumbled.

Referring to the drawings, Figure 1 represents a transverse view through the line :v w of Fig. 2; Fig. 2, a longitudinal elevation through the line 3 y of Fig. 1 Fig. 3, a general view, with certain parts removed to bring to view other parts, as will be hereinafter explained; Fig. 4, an enlarged view through the line 2 z of Fig. 3.

Like letters refer to like parts.

A detailed description of the several figures and the parts which they severally represent is as follows:

A is a cylinder, of suitable diameter and length, with-open ends, mounted on the journals J and d, which are held by the uprights of the frame F. This cylinderis free to be rotated upon its journals by means of a belt pass ing around it, or other suitable contrivance. At P 1? this cylinder projects over and surrounds the end of the dome-shaped funnel B with a close-fittin g but working joint. This cylinder A consists of several parts, and it is peculiarly constructed.

First. a a, its outer wall, is a simple plain cylindermade ofanysuitablematerial,as wood, or sheet or boiler iron.

Second. dd d are longitudinal strips of wood, placed at suitable intervals from each other, but breakingjoints, iusteadof each one extending the whole length of the cylinder, and are fastened to the inner surface of the outer cylinder, a. a a.

Third. I) 1) bis a cylinder of lattice-work, consisting of wooden or metallic strips, willowwork, or wire, or strings, or very coarse cloth, and is securely fastened to the wooden bars at dd.

Fourth. g g g is a cylinder of flannel cloth of the proper texture, which rests on the lattice-work b b b, and with it is fastened to the bars (1 d d by means of the screws h h h, Fig.

4. This lattice-work b I) b and flannel cloth g g 9, taken together for convenience, may be termed the inner wall of the cylinder A, and a a a the outer wall.

Fifth. c e e are thin ribs at suitable intervals from each other, with their outer edges fastened to the inner surface of the inner cylinder, which ribs extend from one end to the other of the cylinder, and pass around in the cylinder in a diagonal or spiral direction, like the thread of a common nut.

Sixth. '5 i i are thin and quite narrow strips placed at considerable distancefrom each other, and standing in a line with the cylinder, and between the spiral ribs 6 c e, with their outer edges resting on the inner surface of the inner cylinder, and their inner edges directed to the central line of the cylinder. The spiral ribs 1: e e and the longitudinal strips it 1' may be fastened to the inner surface of the inner cylinder in various ways-for instance, by means of angle-irons b b attached thereto and fastened to the wall of the inner cylinder by simple bolts b I), as shown in Fig. 4.

Seventh. c c 0 represent the space between the outer and inner cylinders.

Eighth. f f f represent the spiral spaces between the spiral ribs 6 e c.

Ninth. The outer and inner cylinders are so joined together at the two ends as to form an air-chamber between the outer .and inner cylinders, as shown in thedrawings, Figs. 2and 3. Tenth. Z Z Z, Fig. 3, are small openings through the outer cylinder, at a a, at or near the right-hand end, and fora short distance back from this end of the cylinder, opposite to these openings l l l, the flannel cloth is omitted, for reasons hereinafter explained.

B is a dome-shaped cap or funnel, which covers the left end of the cylinder A, the stanchion of the corresponding end of the frame F passing up through its lower side and. fitted therein air-tight. At the center of the outer or dome end of the funnel B is a suitable tubular opening, B, for the object hereinafter explained.

D D is an air-pipe passing through the lower side of the tunnel B and through the journal-box d, and after passing through the journal-box d it divides or branches and extends in opposite directions to and communicates with the air-chamber between the outer and inner cylinders, as indicated by the arrows opposite to P 1?. Within this journalbox at this air-pipe D D is cut or divided transversely, as shown by the dark line at, Fig. 3, to admit of the rotating, of the cylinder A.

C is a suitable hopper, into which is placed the suitably-pulverized ore which is to be separated.

O is the feed-pipe or passage-way from the hopper to the interior of the cylinder A.

G is a suitable faucet or gate, which can be more or less opened to regulate the flow of the ore to the cylinder A. This faucet or gate can be constructed in various ways.

There are to be attached to the air-tube'D D and the tubular opening B in the funnel B suitable air-forcing machines, as steam fanblowers or air-pumps or reservoirs of compressed air constantly supplied under suitable pressure, bymeans of which a sufficiently powerful current or blast of air can be produced, for the purposes hereinafter explained.

The specific function of each of the several parts of my device and the general operation of the machine are described as follows:

The machine is set in motion by steam or other powerby rotating the cylinder A and forcing a'powe'rful current of air into the pipes D D and B, Figs. 2 and 3. Then the valve or gate 0 is opened and the pulverized ore is admitted into the cylinder A.

Theoperation and effect of the machine upon the ore are:

First. To blow a large portion of all the lighter and worthless material directly through the cylinder A by the direct blastor current of air driven'into the air-tube B, Figs. 2 and 3, while the heavier and valuable portion of the material falls on the lower side of the interior of the cylinder, still mixed with worthless matter.

Second. That portion of theore not blown directly through and out of the cylinder is rolled and tumbled upon itself by the rotating of the cylinder, the effect of which is to bring the lighter and worthless portions to the top and'leave the heavier and valuable parts: at

the bottom, which submits the lighter and worthless portion to the direct blast of air, which is constantly carrying portions of it through thecylinder. This tumbling process goes on until the spiral ribs 0 c e have worked it along from the left hand to the right hand, or from the ingress to the egress end of the cylinder.

Third. The purpose of the thin narrow 1ongitudinal strips 6 i 2' between the spiral ribs e e e is to partially lift up the material as the cylinder revolves, so as to cause a portion of it (more or less) to fall across the space within the cylinder, to better enable the direct blast of air through the cylinder to catch and blow out still more of the lighter and worthless portions of it, as it (the mass of ore) is being mechanically worked along through the cylinder.

Fourth. To still further separate thelighter and worthless part of the ore from the heavier and valuable portion constitutes the object of the inner cylinder and the outer current or blast of air which passes through the air-pipe D D into the space or air-chamber c c c between the outer and inner cylinders. That portion of the mass of ore which is not at first and ultimately carried directly through and out of the cylinder by the direct blast through the pipe B is also submitted, as it (the ore) is being worked along and tumbled upon itself within the spiral spaces between the spiral ribs 6 e e, to a powerful blast or current of air from underneath itself, which most effectually blows up into the centralpart of the cylinder all the remaining lighter and worthless portions, which, in turn, are caught by the direct blastor current through B and carried through and out of the cylinder.

'Fifth. By the time a given quantity of ore has passed from the ingress to the egress end of the cylinder the combined effect of the tumbling of the ore and its exposure to the direct blast and indirect or under blast of air will have not only separated the lighter and worthless portions t'rom the heavier and valuable portions, but itwill have carried all the worthless portions of the ore through and out of the cylinder, and left the heavy and valuable portions resting in the cylinder along between the spiral'ribs e e 0.

Sixth. As the cylinder is continuously fed with theme and kept revolving and supplied with the two separate blasts of air, the heavy and valuable portions of the ore will finally accumulate and be worked along by the'spiral ribs 6 e eand at last be deposited through the small openings 1 l I, Fig. 3, near the egress end of the cylinder, after passing through the inner wall of the cylinder, where the flannel cloth is left 011' for this purpose 5 and where the flannel cloth terminates a transverse air-tight partitionym m, Figs. 2 and 3, is placed between the outer and inner walls of the cylinder, to prevent the blast of air between the two walls from passing out of the holes l Z Z.

Seventh. What small part of the valueless portion of the ore may remain in the'cylinder by the time it reaches these small openings 1 ll will be the coarser bits, which will not pass through the finer lattice-work at this end of the inner wall of the cylinder A, but will be ejected out of the cylinder by its rotating, while the heavy and valuable particles of the ore, being very finely triturated, will pass through the finer lattice-work at this end of the inner wall and be deposited between the two walls, and thence pass out of the cylinder through the smallopenings l Zlin the outer wall of the cylinder A.

Eighth. If it is found more effective to break the blast of the outer current of air, or the direct blast, or both, and so cause a broken and sudden action of either or both blasts of air, this can be easily provided for by any suitable method for suddenly cutting off and letting on the currents or blasts of .air. To hasten or retard the passage of the ore through the spiral spaces ff f between the spiral ribs 0 e c, as occasion may require, it is only necessary to raise or lower the frame F at one or the other end.

I do not limit myself to a perfectly round cylinder, as the cylinder A may be formed of several flat sides, making a sort of polygonal cylinder, and thereby produce the same, if not slightly better, results.

I am aware that the application of puffs or a current of air to the lower surface of pulverized ore while it (the ore) is being agitated in an open vessel for the purpose ot' separation is not new. Therefore I do not claim, broadly, the application of a current of air to the lower cylinder, leaving an air-chamber, c c 0, between the two walls ofthe two cylinders, theinner Wall being composed of the lattice-work b I) b and a flannel or other suitable cloth, ggg, substantially in the manner and for the purposes described.

2. In an ore-separator, the combination of the lifting-strips i i i, the spiral ribs 6 e e, and double-walled cylinder A, substantially in the manner and for the purposes set forth.

3. In an ore-separator, the combination of the funnel B, air-pipe B, air-pipe D D, feed 'pipe or box 0, and double-walled cylinder A,

substantially in the manner and for the purposes described. a

. FRANK G. JOHNSON.' Witnesses:

J NO. J. MALMAR,

N. O. HALSTED.

Images