US784850A - Sulfid-ore-smelting brick and process of making same. - Google Patents

Description

No. 784,850. PATENTED MAR. 14, 1905.

' J. FURUKAWA.

SULFID ORE SMELTING BRICK AND PROCESS OF MAKING SAME.

APPLIOATIONFILED OUT. 22. 1904.

UNITED STATES Patented March 14, 1905.

JUNKICHI-FURUKAWVA, OF TOKIO, JAPAN.

SULFID-O RE-SMELTING BRICK AND PROCESS OF MAKING SAME.

SPECIFICATION formingpart of Letters Patent No. 784,850, dated March 14, 1905.

Application filed October 22, 1904. Serial No. 229,606.

To aZZ whom it may concern.-

Be it known that I, J UNKICHI FURUKAWA, a

subject of the Emperor of Japan, residing at 7 Setomonocho Nihonbashiku, Tokio, Japan, have invented a new and useful Improvement in Sulfid-Ore-Smelting Brick and Process of Making the Same, of which the following is a specification.

In a smelting-works there is always more or less fine ore and flue-dust to be smelted and smalls of coke produced by handling. These three materials I shall refer to in this specification severally and collectively as charging-material smalls. To charge such fine materials directly into the blast-furnace would cause much trouble by choking the furnace, causing irregularity, lessening capacity, requiring more blast-pressure and more coke, and producing much flue dust. To avoid these evils, it has been customary to mix this charging-material smalls with clay or with lime as a binding or cementing material and mold the mixture into bricks, which after being dried were smelted in the blast furnace; but the bricks made in this way cannot withstand breakage and are very largely broken again into fine particles by handling.

My invention consists in the process of preparing the aforesaid charging-material smalls for smelting by combining the same with matte (either copper matte or iron matte) as the binding material; and my invention also includes the brick of said charging-material smalls bound or unitized by said matte as a new article of manufacture.

In the accompanying drawings I have shown an apparatus in which my process may be carried out and my new article of manufacture produced.

Figure 1 is a vertical section of said apparatus. Fig. 2 is a section of the brick removed from the apparatus.

I perform my process by casting a shell of the matte around a core or ball of said charging-material smalls. My method is performed in the apparatus shown in Fig. 1 and produces the article of manufacture shown in Fig. 2.

In Fig. 1, a is a pot or mold, preferably of cast-steel, although cast-iron will answer. This contains an upward projection b at the bottom to constitute a rest perforated by the outlet 0. (Z is the matte-spout from the forehearth of a copper or iron matting furnace. 1n the use of this form of apparatus the fine ore or flue-dust is first moistened with water and then compressed into a ball or lump of the desired size either by machine or by hand with the assistance of a mold or otherwise. Such a ball or lump 6 is placed within the mold (0 upon the rest ,6. The molten matte from the spout (Z is then permitted to fill the space f within the mold around the ball a and allowed to congeal. The steam from the ball finds its exit through the opening 0. Then the molten matte f has congealed, the brick is removed from the mold in the form shown in Fig. 2 and then constitutes one form of my new article of manufacture, in which the matte forms a secure binding material for the fine ore or flue-dust, the whole constituting a brick that can be handled and smelted without danger of breaking whatsoever. This brick may be of various dimensions; but in practice I have made the ball of about three inches in diameter and the shell surrounding the ball of about four inches in diameter.

In applying my process to treating the smalls of coke I employ exclusively the apparatus shown in Fig. 1. I mix with the smalls of coke from ten to fifteen per cent. of the powder of caking-coal. I then moisten this mixture with a thin paste made of flour, starch, or molasses and compress into a ball or lump, around which is cast the shell of matte, as already described in connection with Fig. 1. Y

In practice a series of the molds shown in Fig. 1 will be mounted upon an endless carrier, such as a belt or table, adapted to present them in rotation under the matte-spout. I use the word "matte in its standard sig- 2. The improvement in the art of smelting which consists in forming a core of chargingmaterial smalls, and casting a shell of matte substantially all around the same.

In testimony whereof I have hereunto signed my name in the presence of two subscribing witnesses.

J UN KICH I FURUKAWA. l/Vitnesses:

HIROKIOHI MUToU, SEIIcHI KIsHI.

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