USRE1052E - Improvement in heating ores - Google Patents

Description

UNITED STATES PATENT OFFICE.

AUGU'srns o. van DYKE, or Gnnnsnrsnae, KENTUCKY.

IMPROVEMENT INA HEATING 'oaEs'L specification forming part of Letters Patent No. 28,025,- aateaaprnai, leso, Reissue No.1,o52, dates y 'October 2, Y1860;

' To afl-Z whom t mie-Ly concern.-

Be it known that I, AUGUSTUS C. VAN DYKE, of Greenupsburg, Greenup county, Kentucky, have invented a certain new and Improved Apparatus for Heating Ore and Charging Iron-Furnaces; and I hereby-declare the following to be a full, clear, and exact description of the same, reference being had to the accompanying drawings, making part of this specification.

The, said improvement consists in the peculiar construction and arrangement of heating grate or basket, conical or bell-shaped open'- Work valve, and feeddoors in connection with the tunnel-head of aniron-furnace, as hereinafter explained.

In the accompanying drawings, Figure l is a vertical section of the apparatus embodying my improvements. Fig. 2 is an external elevation at right angles to Fig. l. y

A is that portion'ot a blast or smelting furnace which forms the discharging-outlet for the waste heat and resultant gases, and is commonly known as the tunnel-head. B is a charging box or hopper placed immediately over the tunnel-head, from whichit flares up-i ward so as to facilitate the descent of ,the

charges. This hopper is completely closed iny on every side, except an opening, b, at thebottom, corresponding to that of the tunnel-head A, to admit the heat and gases from the furnace, and .a side opening, b, through which the said gases, having acted to heat the ore,

escape into the flue C of the boiler C", which generates the steam that aiords the blast power.` D is a door in theside ofthe hopper to admit the coal, and Dl is a door in its top to admit the ore and ilux. These doors, except in the act of charging, are kept constantly closed. Depending from the top of the hopper B, so as to hang immediately over and to in tercept the waste heat and gases from the tun-- nel-head, is an open-work basket grate, E, having the general form of an inverted conoidal frustum, having at its lower end `a large circular aperture, c, which, except lat the moment of discharging the ore from the grate, is

close by the'conical or bell-shaped open-work gate F, which, being of open work like the grateE and extending upward into said grate,

greatly facilitates theentranee of the waste' heat and gases and their diffusion through the ore in the basket. v

It is evident .that the gate F may be made more bell-shaped or .more tapering, and that it may be extendedA upward into the interior of the basket vto the center ,or even to near the 'top of the same. of judgment inconstruction, and does hot affect the principle of my improvement. In practice I-have found it well to extend it beyond the center.

IThe gate F is operated by` a rod, G, and

lever H, or their equivalents, which, being held in place by a cable or otherwise, keep the grate closed.

Operation A charge of coal having lbeen ,/made through the door D, and said door being thenl closed, the .door D' is opened anda charge of properly 'broken and mingled ore andftlux is thrown into the grate E, and the door' D' also being then closed, the ore andflux are confined o'n all sides as in a close furnace whose flames quicklyr permeate the entire mass. The ore, being thus brought into actual and intimate contact with the ames,

reaches a red heat by the time another charge is necessary, when the door D being again temporarily opened, another charge of coal'is thrown in, and the lever H being liberated the gate F falls and allows the red-'hot mass of ore and flux to descend into the furnace. The gate F` being then closed, the door D is opened and another lot of ore and ilux in#l serted as before.

I am aware that abasket or roaster has been used'for deoxidizing ore at the tunnel-head,

and also that drop-valves or false bottoms -have been applied 'to ore-heaters for introducing the ore into the furnace; but y I claim as new and of my inventionl. The described arrangement of the oreheater E, gate F, rod G, and doors D'and D' `in connection with the tunnel-head A, the

whole being constructed, combined, and operated in the manner and for the purposes herein set forth. A'

2. The open-work basket-grate E in combination with the conical or bell-shaped openwork gateA F, when used iu connection with v This is, however, a matter.

e l y x 1,052

the tunnel-head of tially as described.

I 3. The* conical onheil-shaped 'open-work gate F, for lche purpose of more readily diffusa blast-furnace, su'bstnlning the heat and gases through the ore and of discharging the ore into the furnace when heated, substantially as described.

In testimony of which invenfion I hereunto set my hand. A. e. VAN DYKE.

Witnesses:

J. PoLLocK, I. E. WiNN.

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