US1606666A

US1606666A - Apparatus for the heat treatment of materials by means of molten metal

Info

Publication number: US1606666A
Application number: US709622A
Authority: US
Inventors: Rider Douglas
Original assignee: Thermal Ind & Chem Tic Res Co
Current assignee: Thermal Ind & Chem Tic Res Co; THERMAL INDUSTRIAL AND CHEMICAL (T I C) RESEARCH Co Ltd
Priority date: 1923-06-04
Filing date: 1924-04-28
Publication date: 1926-11-09
Anticipated expiration: 1943-11-09

Description

. 1,606,666 D. RIDER 1 APPARATUS FOR THE HEAT TREATMENT OF MATERIALS BY MEANS OF MOLTEN METAL Filed, April 2s 19 4 2 Sheets-Sheet 1 Nov. 9 1926.'

Nov. 9 1926.

D. RIDER A APPARATUS FOR THE HEAT TREATMENT OF MATERIALS BY MEANS OF MOLTEN METAL 4 FIG. 2.

Filed April 1924 6 III m 5 I u g 2 Sheebs-Sheet 2 Patented N 0v. 9, 1926.

UNITED' STATES 1,606,666 PATENT orrics.

DOUGLAS RIDER, OF LONDON, ENGLAND, LASSIGNOR TO THERMAL INDUSTRIAL AND CHEMICAL (T. I. 0.) RESEARCH COMPANY BRITISH COMPANY.

LIMITED, OF LONDON, ENGLAND, A

APPARATUS FOR/THE HEAT TREATMENT OF MATERIALS BY MEANS OF MOLTEN METAL.

Application filed April 28, 1924, Serial No.

This invention relates to apparatus for causing materials to travel through molten metal while spread in the form of a thin layer on the surface of a revolving disc.

6 It is an object of the invention to provide an apparatus in which the time of contact of the material with the molten metal shall be prolonged notwithstanding that the total length of the bath of metal through which the material travels is comparatively small and the throughput of the apparatus is comparatively large.

With this and other objects in view. ap-

. paratus has been constructed, an embodiment of which is illustrated in the accompanying drawings.

Apparatus forming the subject-matter of the invention is suitable, for example, for the distillation of subdivided solid material,

suchas sawdust, or for the drying of powders.

Fig. 1 is a longitudinal vertical section on line 1-1 of Fig. 2 through an apparatus constructed according to the invention; Fig.

2 is a plan, the cover having been removed; gig. 3 is a cross section on line 3-3 of Fig. 4 is a detail of a driving gear, and Figs. 5, .6 and 7 are enlarged views of a detail, Fig. 5 being an elevation, Fig. 6 a plan I %nd Fig. 7 a cross section' on line 7-7 of i 5. i

The apparatus shown is intended primarily-for use as a still for destructively distilling subdivided solidmaterial, but is useful for other purposes for which it may be adapted, and comprises a chamber (1 having a rotary charging device 6, an outlet 0 for volatile products and a discharge chute d having a water seal 6. The still contains molten metal to the level f. Just above this level are shafts g turning in bearings in the sides of the still and carrying so as to rotate with them the naves h of discs 2'. These discs are constructed of a material which is not wetted by the molten metal; for example, mild steel or machined cast-iron is suitable when a bath of molten lead is used. The discs on each shaft are in staggered relationship to those on adjacent shafts. Above the discs, bars k extend across'the still and to these are fixed the depending 709,622, and in Great Britain June 4, 1923.

scrapers shown in'detail in Figs. 5, 6 and 7. The scraper consists of a strip of metal Z bent at right angles and of width substantially equal to the distance between two discs on the same shaft. The vertical portion extends to a level just below the surface of the molten metal so that it forms a baflie preventing travel of material along the said surface. The horizontal portion is forked to accommodate the disc on the shaft in advance of that carrying the discs to which the scraper is applied. Each prong of the fork is higher at its inner edge than at its outer edge as indicated in Fig. 7, so that the outer edge of the prong forms a knife edge scraping the surface of the disc adjacent to it, while the inner edge forms a guide ensuring feed of the material to the re-entrant angle between the surface of the molten metal and that of the disc, thedirection of rotation of which is indicated by the arrows in Fig. 1.

The shafts g are preferably driven by ratchet wheels m and lever pawls n, the 1 latter being connected together by rod 0 which receives a reciprocating movement from the eccentric p.

Having thus fully described the nature of the said invention and the best means I know-for carrying the same into practical effect, I claim':' I

1.;Apparatus of the kind herein described comprising a chamber to contain molten .metal, a plurality of substantially parallel not wetted by the molten metal mounted on each shaft, the shafts being spaced apart by less than the diameter of a disc and the discs b ing mounted on the'shafts so that pair of discs on an adjaeach disc on one shaft extends in part between a pair of discs on an adjacent shaftand means for rotating the discs on their axes. 3. Apparatus of the kind herein described comprising a chamber to contain molten metal, a plurality of substantially parallel horizontal shafts mounted within the cham-.v ber, a plurality of similar discs 'ofmaterial not wetted by the molten metal mounted on each shaft, the shafts being spaced apart by less than the diameter of a disc and the discs being mounted on the shafts so that comprising a chamber to contain moltenmetal, a plurality of substantially parallel horizontal shafts mounted within the chamher, a plurality of similar discs of material notwetted by the molten metal mounted on each shaft, the 'shafts being spaced apart by less than the diameter ,of a disc and the 'discs being mounted on the shafts so that each disc on one shaft extends in part between a pair of discs on an adjacent shaft, partitions extending between the discs on each shaft and extending at least to the surv face'of the metal and means for rotating the discs on their axes.

I 5. Apparatus of the kind herein described comprising a chamber to contain molten metal, a plurality of substantially parallel horizontal shafts mounted within the chamber, a plurality of similar discs of material not wetted by the molten metal mounted on each shaft, the shafts being spaced apart by less than the diameter of a disc' and the discs being mounted on the shafts so that each-disc on one shaft extends in part be tween a pair of discs on an adjacent shaft,

partitions extending between the discs on each shaft and extending at "least to the surface of the metal, means for rotating the discs on their axes and means below the surface of the metal for scraping each face of each disc.

6. Apparatusiof the kind herein described comprising a chamber to contain molten metal, a plurality of substantially parallel horizontal shafts mounted within the chamber, a plurality of similar discs of material not wetted by the molten metal mounted on each shaft, the shafts being spaced apart by less than 'the diameter of a disc and the discs being mounted on the shafts so that each disc on one shaft extends in part between a pair of discson an adjacent shaft, partitions extending between the discs on each shaft and extending at least to the surface of the metal, means for rotating the discs on their axes and means carried by the said partitions and extending below the surface of the metal for scraping each face of each disc.

7. Apparatus of the kind herein described comprising a chamber to contain molten metal, a plurality of substantially parallel horizontal shafts mounted within the chamber, a plurality of similar discs of material not wetted by the molten metal on each shaft, the shafts being spaced apart by less we r than the diameter of a disc and the discs the said discs on their axes.

' In testimony whereof I have 'slgned my name to this specification.

DOUGLAS RIDER.