US138781A - Improvement in compounds for tuyeres - Google Patents

Description

UNITED STATES PATENT OEEIoE.

JAMES E. ATWOOD, OF PITTSBURG, PENNSYLVANIA.

IMPROVEMENT IN COMPOUNDS FOR TUYERES.

Specification forming part of Letters Patent No. 138,781, dated May 13, 1873 5 application filed May 5, 1873.

To all whom it may concern:

Be it known that I, JAMEs E. ATWOOD, of Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented an Improved Oompound for Making Tuyeres, of which the following is a specification:

This invention relates to the tuyeres of Bessemer, Kelly, or other converters which are molded from a plastic refractory material; and it consists in a compound formed from plumbago, preferably old crucibles, old firebrick, German or other plastic clays, burned or unburned sand, and stone clays, preferably Mount Savage, which is a fire-brick clay, which materials are intimately mixed and thorough- 1y worked in the manner hereinafter specified.

Take of plumbago or old crucibles about thirty parts; fire-brick, thirty parts; German or other plastic clay, twenty parts; sand, burned or unburned, ten parts; and stone clay, Mount Savage, ten parts; mix them thoroughly and put them. in any of the well-known mills, grinding them together until intimately mixed and sufficiently fine for the purpose required. The mass is then dampened with water until sufficiently plastic to be readily molded, when the tuyere can be made in the manner commonly practised in the art.

Tuyeres-he'retofore made from the several fire-clays, compounds of the same, ganister, 850., would at the best last but from three to five heats or blows, when the tuyere as well as the bottom lining of the converter required repairing. The size and unwieldiness of the converter rendered repairing a severe tax upon the workmen, while the time required for the converter to cool was another loss to the manufacturer. As a consequence large establishments have kept a supply of spare converters to replace others as the lining burned out. My present compound will remedy this to a great extent, as a tuyere molded from it will last from twelve to twenty-four heats or blows.

What I claim is 1. A compound consisting of old crucibles, fire-brick, German clay, and burned or nu burned sand, for forming converter-tuyeres, as set forth.

2. A compound consisting of plumbago, firebriek, Germ an clay, sand burned or unburned, and Mount Savage stone clay, as set forth, for forming the tuyeres of Bessemer or other converters.

JAMES E. ATWOOD.

Witnesses:

CHARLES ZIMMERMAN, LUTHER MARTINN.