US979349A

US979349A - Furnace for roasting ores.

Info

Publication number: US979349A
Application number: US558?5710A
Authority: US
Inventors: Xavier De Spirlet
Original assignee: Individual
Current assignee: Individual
Publication date: 1910-12-20
Anticipated expiration: 1927-12-20

Description

I which has hitherto been carried out practisrarns rar XAVIER DE SPIBL', or BRUSSELS, BELGIUM.

FUBNACE FOB ROASTING QRES.

Application led April 30, 1910. Serial No. 558,1157.'

engineer, 8 Avenue Rogier, Brussels, in the Kingdom of Belgium, have invented new and useful Improvements in or Relating to Furnaces for Roasting Ores, for which ap-A plication has beenmade in Belgium May 5, 1909.

This invention relates to a mechanical furnace for roasting sulfurous ores, more particularly blende (zinc sultid), a4 process cally only by hand labor.

A constructional form of the roasting furnace according toy this invention is il1ustrated, by way of example, in the accompanying drawing in which,

Figure 1 is a vertical section ofthe furnace on the line 11 of Fig. 2 and Fig. 2 is a horizontal cross-section on the line `2 2 of Fig. 1. I

The furnace comprises a certain number of superposed horizontal circular' plates forming hearths or soles arranged in floors and completely independent of each other. In the example illustrated, the number of plates or hearths is assumed to be nine, but it is obvious that any desired number may be used, such number varying 'in accordance with the circumstances, such as the kind of the ore to be treated, means for heating, etc. Alternate plates, as 1, 3, 5, 7, 9 are stationary, while the others, as 2, 4, 6, 8 are movable around an imaginary axis coinciding with the vertical axis of the furnace. The

fixed plates are carried by columns 10 ar-t ranged `on the angles of a polygon formed by connecting bars 11 circumscribing thefurnace. The columns 10, of which there are six in the, example illustrated, support also the movable plates by means of a toothed driving ring 12 provided with rollers 13 traveling on rails 14' secured to the said columns.

The upper fixed plate l which closes the furnace, is lined with. a suitable non-conducting material in order to prevent loss of heat and provided'with a suitable distribut-4 ing apparatus for the ore. An opening 15 made in the center, vis used for carrying away the sulfurous gasesthrough a suitable conduit 16.

The movable plates 2, 4, 6, 8 are rotated by mean-s of a vertical spindle 17 carrying toothed pinions 18 engaging with the rings 12, the said spindle being driven from the toothed ring top or the bottom by means of suitable transmission gear. The speed of rotation is preferably the same for all the movable plates, but it might be varied from one plate to another, for instance, it might decreasef from the top downward. It would be suicient for the purpose' to vary suitably the proportion between the pinions 18 and the Both the fixed and the movable plates consist of ring-like plates 19 of special crosssection, formin the beginnings of very low arches and are ormed of refractory material of suitable composition and quality. Each 70 plate is provided with a series of teeth 20, also of suitable refractory material, secured in the arch, the said teeth being shaped and arranged so as to move the ore spread on the plate or hearth immediately below in the 7 5 desired direction, either from the center toward the circumference or from the circumference toward the center. Thusn the example illustrated, the cover plate 1 is pro 'vided with teeth designed and arranged sol 80 as to move the ore supplied by the distributer at the center of the plate 2,1from the center toward the'circumference merely by the rotation of the said plate. The said ore arriving at the circumference of plate 2, falls through openings 21 on the xed plate 3. The teeth vprovided on the arch 2, bring the ore back from the circumference of the plate 3 toward a central hole 22'Whenceit falls on to the plate 4, and so on .from one plate to another, through the

holes

23, 24, 25, 26, 27 and 28. The gases follow a reverse path through the same holes 28, 27, 26, etc., until they are carried away.

The joints between ythe different plates, which are completely ,independent of each other,l are obtained'bty-,means of annular troughs or channels 29V constituted b a ring or hoop with which engages the e ge of a cylindrical projection 30 of the ring ofthe 100 plate immediately higher. The channels are filled with tine ore, sand or any'other suitable material in powdered form, or even'. with liquid, for obtaining thebest possible joint preventing the escape of gases or en-l trance of air. 1 f

The working of the furnace can be at will either absolutely continuous or intermittent accordin to circumstances, the speed or the speeds og in every particular case.

Each apparatus can be heated independ-` rotation being naturally adjustable 1 '10 `rif/irais ently or a battery or series ot apparatus can be heated from one and the same source. Only one plate is heated, but air for oxidation purposes is introduced into the furnace at an ad]ust-able high temperature.

Mechanical furnaces constructed as hereinbefore described have the following important advantages. @Wing to the use of rotary rolling plates, the furnace can be iven a suilicient diameter orkeeping Within advantageous limits the losses by radlation per unit of a useful surface. @Wing to this construction, it is, moreover, possible to avoid altogether'. the use in the interior of the urnaceof metal parts which, in a sulurous atmosphere are unable to standthe high temperature required for roasting blende, and become completely corroded in spite of the cooling devices designed for preventing it, when a lower temperature may be maintained, as for instance in roasting pyrites. Moreover this construction renders any cooling superfluous and thuseconomizes the fuel. The construction of the furnace makes repairs easy, as taking to pieces and rerecting can be effected quickly. Finally, the arrangement enables the costota roasting installation to be reduced owing to the large diameters which may be given to the roasting plates and the greater output resulting therefrom.

I declare that what l claim is:

l. )in ore roaster comprising in combination, a series ot superposed lates of retractory material spaced apart rom each other to form intervening chambers, said plates having openings 'for successive delivery of one' plate to the next lowerinost plate, said plates having means tor moving the material toward said openings, means for moving certain ot said plates with respect to the remaining plates, and means forming closed joints at the outer margins ot said plates.

2. An ore roaster comprising in combination, a series ot snperposed plates of refractory material spaced apart from each other to form intervening chambers, said plates having openings for successive delivery of one plate to the next lowcrmost plate with the openings of adjacent plates out ot alinement, teeth for said plates for moving the material toward said openings, means for rotating certain of said plates with respect. to the remaining plates, and annular inter-f fitting joint members closing the openings between said plates at the outerv margins thereof.

3. An ore roaster comprising incombination, a housing, a sci-ies oi superposed plates therein spaced apart trom each other to form intervening chambers', means for moving certain of said plates vvith respect to other plates, and' means carried by the plates and disposed wholly within said housing for moving the material on said plates toward a discharging position.

y 4. An ore roaster comprising in combination, a series of superposed plates spaced apart from each other to form intervening chambers, certain of said plates being stationary, means for moving some of said plates, and means carried by said stationary plates for causing the material to move toward a discharging position upon movement of the movable plates.

5. An ore roaster comprising in combination, a series of superposed plates spaced apart from each other to form intervening chambers, certain of said platesY being stationary, means for moving other of said plates with respect to the stationary plates. and means carried by the stationary and movable plates for causing the material to advance toward a discharge position upon actuation o'f the movable plates.

. 6. An ore roaster comprising in combination, a series of superposed plates spaced apart from each other toforin intervening chambers, said plates having openings for successive delivery of the material of'one plate to the next lowermost plate, means for moving certain of said plates with respect to the remaining plates, -certain of said plates carrying means for advancing the operation of the movable plate.

7. An ore roaster comprising in'combination, a series vof superposed plates spaced apart from each other to form interve chambers, means for moving certain of ld plates with respect to the remaining plaies. said plates carrying means for moving or advancing the i, "t rial in different directions to a dischargng pcution,

An ore roaster compi sing ii combination, a series of superposed plates spaced apart from each other to form intervening chambers. means for moving certain oi said plates with respect to the remaining` plates. certain of said plates carrying means for moving the material toward the center thereof' and other of said plates carrying means for moving the material toward the periphery thereof uponl movement ot' certain of said plates.

ln testimony Whereot'v l ailix my signaturiin presence of two witnesses.

. XAVIER Dlt SPIRLET.

v\Vitnesses L. 'Paiin'r'rm lanceur Pnnniv llO