US428747A

US428747A - Charles

Info

Publication number: US428747A
Authority: US
Publication date: 1890-05-27
Anticipated expiration: 1907-05-27

Description

To all whom it may concern:

UNITED STATES PAT NT OrFIcE.

CHARLES J. nnnns, on NEW YQBK, ,N. Y.

BOTTOM FOR REDUCING-FURNACES.

SPECIFICATION formingpart of Letters Patent No. 428,747, dated May 27, 1890. A raise filed January 30,1890. Serial No. 338,683- (No model.)

Be it known that I, CHARLES J. EAMES, a citizen of the United States, residing at New York city, in the county and State of New York, have invented certain new and useful Improvements in Bottoms for Reducing-Eurnaces; and I hereby declare the following to be a full, clear, arid exact description-of the same, such as will enable'others to apply the invention.

My invention relatestothe production of certain neutral or basic compositions for the formation of the bottoms of reducing and othenmetallurgic furnaces, and has for its object to obtain a smooth, durable, non-wearing bottoni; on which metallurgic operationssuch as the reduction of ore, desulphuriza tion and dephosphorizat-ion of ore, drew-can be conducted without any irregular cutting or destruction of the bottom, and without. such waste ,of the bottom as shall modify," change, aife'ct, or delaythe metallurgic pro-' cesses conducted in said furnaces.

To this end my invention, generally stated, consists in aniisture or compound forfur nace bottoms wherein dolomite or magnel. sia-n limestpne and a solid carbon, the carbon acting to excludeoxygen fromtheflime and retard waste, arecombiued with one or more surface for spar to complete the mass and obtain a glazed-- the bottom, all substantially as hereinafter more fully appear.

1 will now proceed to describe the preferi'ed proportions of the elements, as well as the preferred manner of uniting and applying the same, so as to enable others skilled in the art to carry out the invention; but I distinctly disclaim limitation to said propor In carrying out my lnvention I preferably take seventy-five per cent.,'(7 5 by weight,

of dolomite, ten per cent, (10%,) by weight, of a solid carbon, preferably one devoid of hydrocarbons, such as coke or graphit-ic carbon, seven per cent. (7%) of fire-sand, six per cent. (6%) fire-clay, and two per cent. (2%) fluor-spar.

Such of the above elements as require itviz., the. carbon, dolomite, and fluor-sparare reduced to a granular condition by any suitable means, and all the elements are then intimately mixed and worked into a plastic mass by means of a pug or other suitable mill and ,the addition of a. suitable liquid, I preferably a weak solution of silicate of sodasay one .(1) pint silicate of soda to about five (5) gallons of water; and the mixture or mass "thus'fornid is then applied-to the furnacebottorn. in a layer varying from four (4) to ten' (10) inches in depth, according to the size of the furnace and character of metallurgic process to be conducted in said furnace. The said mixture is applied to the cold furn'ac'e and'the furnace gradually fired or heated toy-drive elf the moisture, the heat being finally raisedtovitrify or glaze -the surface of the bottom.

w The nietallurgic processes subsequently conducted in'afurnac'e having such a bottom will ultimately fuse the bottom for adepth .of perhaps half an inch or so; but, owing to the protection afforded to the dolomite by the carbon and the virtual exclusion of oxygen from the dolomite, the waste of the bottom is exceedingly slow and so slight with each charge. as to have no material effect on the charge,

The bottom hereinbefore described is exeeedingly durable, and, as it retains a glazed uniform surface, facilitates the handling of the charge worked thereon.

Having thus described my invention, what;

I claim, and desire ent, isv 1. A composition for furnace-bottoms, composed of dolomite, carbon, and binders, including fluor-spar, substantially as and for the purposes specified.

to secureby Letters Patf 2. A composition for furnace-bottoms, com )9 5 posed of dolomite, carbon, and the binders fluor spar, fire. clay, and, fire sand, substantially as and-for the purposes specified.