US897993A

US897993A - Smelting.

Info

Publication number: US897993A
Application number: US40522107A
Authority: US
Inventors: Alexander R Mckenzie
Original assignee: Individual
Current assignee: Individual
Priority date: 1907-12-05
Filing date: 1907-12-05
Publication date: 1908-09-08
Anticipated expiration: 1925-09-08

Description

No. 897,993. PATENTED SEPT. 8, 1908.

A. RVMGKENZIE.

SMELTING.

APPLICATION FILED DBO.5,1907.

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ALEXANDER R. MCKENZIE, OF GREAT FALLS, MONTANA.

SMELTIN G.

Application filed December 5, 1907.

T 0 all whom it may concern:

Be it known that'I, ALEXANDER R. Mc- KENziE, of Great Falls, in the county of Gascade and State of Montana, have invented certain new and useful Improvements in Smelting and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to improvements in smelting and more particularly to the smelting of comminuted ore, such for example as flue dust,one object of the invention being to avoid the molding of fine ore or flue dust into the form of briquets and the expense in cident thereto.

A further object is to utilize the heat of the slag and matte as it passes from a blast furnace to a settling tank, in the smelting of fine ore, such as flue dust.

With these objects in view the invention consists in certain novel steps in a smelting process as hereinafter set forth and pointed out in the 'claims.

The accompanying drawing is a view in section illustrating one embodiment of an apparatus with which my improved process may be carried into effect.

While various forms of mechanical devices might be utilized in effecting the steps of the process, I have found that an apparatus, such as illustrated in the drawing, will subserve the purposes of my invention. This apparatus I will now describe in detail.

1 represents a blast furnace which may be of any preferred form of construction and provided with the various appurtenances necessary for the operation of the furnace in smelting ore. The apparatus may also be provided with a chamber 2 communicating with the flues for containing accumulations of flue dust. The bottom of the furnace is provided with a spout 3, by means of which the slag and matte will be discharged into a suitable settler or settling tank 4,the matte which settles in the bottom of this tank being drawn off in the usual manner. Provision is also made for the drawing ofl of the slag.

In accordance with my invention, the finely divided ore or flue dust is fed to the stream of slag and matte as the latter flows from the spout 3 into the settler. A convenient means for accomplishing this, consists of a hopper 5 for the reception of the flue dust,

Specification of Letters Patent.

Patented Sept. 8, 1908.

Serial No. 405,221.

the lower end of this hopper terminating in a contracted spout 6, so disposed as to discharge the flue dust directly into the stream of slag and matte flowing into the settler. In order to regulate the feeding of the flue dust, the contracted lower portion of the hopper is provided with a suitable valve 7.

Flue dust, being fine and dry, is in proper form for smelting and as it is self-fluxing, it will generate heat in the settler. As the flue dust is fed to the slag and matte during the flow of the latter from the spout of the blast furnace to the settler, it will pass with said slag and matte into the body of molten slag under the slag crust indicated at 8 on the drawing. The heat of the slag and matte flowing from the furnace and the self-fluxing quality of the flue dust will be utilized in causing the smelting of the latter in the settling tank,the metal in the flue dust being precipitated with the metal or matte which has been smelted in the furnace and conducted to the settler.

From two to five per cent. of the contents of a charge of ore to the furnace, goes out to the dust chamber as flue dust. With my improvements all of this flue dust can be dropped into the stream of matte and slag from the furnace to the settler and smelted without the need of any added fuel.

Having fully described my invention what I claim as new and desire to secure by Lettors-Patent, is,-

1. The herein described smelting process, consisting in discharging slag and matte from a furnace to a settler, and discharging fine ore into the stream of slag and matte as tlie same flows from the furnace to the sett er.

2. The herein described process, consisting in mixing fine ore with molten slag and matte issuing from a smelting apparatus. v

3. The-herein described process, consisting in discharging molten slag and matte downwardly into a settler. and discharging fine ore into said downwardly flowing stream of molten slag and matte, whereby said fine ore will be carried by said stream into the body of molten slag and matte in the settler.

4. The herein described process, consisting in discharging flue dust with molten slag and matte into a receptacle and smelting the flue dust in said rece tacle.

. 5. The herein described process, consisting in smelting a body of ore in a furnace, dis

Q s97,99s

charging the molten sla and matte from said furnace to a receptac e, discharging flue dust or fine ore With the slag and matte into said rece tacle and utilizing the heat of said 5 molten slag and matte and the self-filming quality of the flue dust to smelt the latter in said receptacle.

Iii testimony whereof, I have signed this specification in the presence of two subscribing witnesses.

ALEXANDER R. MCKENZIE.

Witnesses:

DUNCAN M. GILLIs, ROGERS W. BERRY.